= WeeChat plugin API reference
:author: Sébastien Helleu
:email: flashcode@flashtux.org
:lang: en
:toc: left
:toclevels: 4
:sectnums:
:sectnumlevels: 3
:docinfo1:


This manual documents WeeChat chat client, it is part of WeeChat.

Latest version of this document can be found on this page:
https://weechat.org/doc


[[introduction]]
== Introduction

WeeChat (Wee Enhanced Environment for Chat) is a free chat client, fast and
light, designed for many operating systems.

This manual documents WeeChat plugins API, used by C plugins to interact with
WeeChat core.

[[plugins_in_weechat]]
== Plugins in WeeChat

A plugin is a C program which can call WeeChat functions defined in an
interface.

This C program does not need WeeChat sources to compile and can be dynamically
loaded into WeeChat with command `/plugin`.

The plugin has to be a dynamic library, for dynamic loading by operating
system.
Under GNU/Linux, the file has ".so" extension, ".dll" under Windows.

The plugin has to include "weechat-plugin.h" file (available in WeeChat source
code).
This file defines structures and types used to communicate with WeeChat.

In order to call WeeChat functions in the format displayed in <<plugin_api>>,
the following global pointer must be declared and initialized in the function
<<_weechat_plugin_init,weechat_plugin_init>>:

[source,C]
----
struct t_weechat_plugin *weechat_plugin;
----

[[macros]]
=== Macros

The plugin must use some macros (to define some variables):

WEECHAT_PLUGIN_NAME("name")::
    the plugin name

WEECHAT_PLUGIN_DESCRIPTION("description")::
    a short description of plugin

WEECHAT_PLUGIN_VERSION("1.0")::
    the plugin version

WEECHAT_PLUGIN_LICENSE("GPL3")::
    the plugin license

WEECHAT_PLUGIN_PRIORITY(1000)::
    the plugin priority (optional, see below)

[[main_functions]]
=== Main functions

The plugin must use two functions:

* weechat_plugin_init
* weechat_plugin_end

==== weechat_plugin_init

This function is called when plugin is loaded by WeeChat.

Prototype:

[source,C]
----
int weechat_plugin_init (struct t_weechat_plugin *plugin,
                         int argc, char *argv[]);
----

Arguments:

* _plugin_: pointer to WeeChat plugin structure, used to initialize the
  convenience global pointer `weechat_plugin`
* _argc_: number of arguments for plugin
* _argv_: arguments for plugin (see below)

Return value:

* _WEECHAT_RC_OK_ if successful (plugin will be loaded)
* _WEECHAT_RC_ERROR_ if error (plugin will NOT be loaded)

[[plugin_arguments]]
===== Plugin arguments

When the plugin is loaded by WeeChat, it receives the list of arguments
in parameter `argv` and the number of arguments in `argc`.

The arguments can be:

* command line arguments when running the WeeChat binary,
* arguments given to the command `/plugin load xxx`, when the plugin is manually
  loaded by the user.

When the arguments come from the command line, only these arguments are sent to
the plugin:

*-a*, *--no-connect*::
    Disable auto-connect to servers when WeeChat is starting.

*-s*, *--no-script*::
    Disable scripts auto-load.

*plugin:option*::
    Option for a plugin: only the plugin-related options are sent, for example
    only the options starting with `irc:` are sent to the plugin called "irc".

[[plugin_priority]]
===== Plugin priority

When plugins are auto-loaded (for example on startup), WeeChat first loads all
plugins, and then calls the _init_ functions, using the priority defined in
each plugin. A high priority means that the _init_ function is called first.

Default priority is 1000 (with such priority, the plugin is loaded after all
default plugins).

The default WeeChat plugins are initialized in this order:

include::autogen/plugin_api/plugins_priority.adoc[]

==== weechat_plugin_end

This function is called when plugin is unloaded by WeeChat.

Prototype:

[source,C]
----
int weechat_plugin_end (struct t_weechat_plugin *plugin);
----

Arguments:

* _plugin_: pointer to WeeChat plugin structure

Return value:

* _WEECHAT_RC_OK_ if successful
* _WEECHAT_RC_ERROR_ if error

[[compile_plugin]]
=== Compile plugin

Compile does not need WeeChat sources, only file _weechat-plugin.h_ is
required.

To compile a plugin which has one file "toto.c" (under GNU/Linux):

----
$ gcc -fPIC -Wall -c toto.c
$ gcc -shared -fPIC -o toto.so toto.o
----

[[load_plugin]]
=== Load plugin

Copy file _toto.so_ into system plugins directory (for example
_/usr/local/lib/weechat/plugins_) or into user's plugins directory (for example
_/home/xxx/.weechat/plugins_).

Under WeeChat:

----
/plugin load toto
----

[[plugin_example]]
=== Plugin example

Full example of plugin, which adds a command `/double`: displays two times
arguments on current buffer, or execute two times a command (OK that's not
very useful, but that's just an example!):

[source,C]
----
#include <stdlib.h>

#include "weechat-plugin.h"

WEECHAT_PLUGIN_NAME("double");
WEECHAT_PLUGIN_DESCRIPTION("Test plugin for WeeChat");
WEECHAT_PLUGIN_AUTHOR("Sébastien Helleu <flashcode@flashtux.org>");
WEECHAT_PLUGIN_VERSION("0.1");
WEECHAT_PLUGIN_LICENSE("GPL3");

struct t_weechat_plugin *weechat_plugin = NULL;


/* callback for command "/double" */

int
command_double_cb (const void *pointer, void *data,
                   struct t_gui_buffer *buffer,
                   int argc, char **argv, char **argv_eol)
{
    /* make C compiler happy */
    (void) pointer;
    (void) data;
    (void) buffer;
    (void) argv;

    if (argc > 1)
    {
        weechat_command (NULL, argv_eol[1]);
        weechat_command (NULL, argv_eol[1]);
    }

    return WEECHAT_RC_OK;
}

int
weechat_plugin_init (struct t_weechat_plugin *plugin,
                     int argc, char *argv[])
{
    weechat_plugin = plugin;

    weechat_hook_command ("double",
                          "Display two times a message "
                          "or execute two times a command",
                          "message | command",
                          "message: message to display two times\n"
                          "command: command to execute two times",
                          NULL,
                          &command_double_cb, NULL, NULL);

    return WEECHAT_RC_OK;
}

int
weechat_plugin_end (struct t_weechat_plugin *plugin)
{
    /* make C compiler happy */
    (void) plugin;

    return WEECHAT_RC_OK;
}
----

[[plugin_api]]
== Plugin API

Following chapters describe functions in API, sorted by category.

For each function, we give:

* description of function,
* C prototype,
* detail of arguments,
* return value,
* C example,
* example in Python script (syntax for other scripting languages is similar).

[[registering]]
=== Registering

Functions to register a script: used only by scripting API, not the C API.

==== register

Register the script.

For more information, see the
link:weechat_scripting.en.html#register_function[WeeChat scripting guide].

Script (Python):

[source,python]
----
# prototype
weechat.register(name, author, version, license, description, shutdown_function, charset)
----

[NOTE]
This function is not available in the C API.

[[plugins]]
=== Plugins

Functions to get infos about plugins.

==== plugin_get_name

Get plugin name.

Prototype:

[source,C]
----
const char *weechat_plugin_get_name (struct t_weechat_plugin *plugin);
----

Arguments:

* _plugin_: pointer to WeeChat plugin structure (can be NULL)

Return value:

* name of plugin, "core" for WeeChat core (if plugin pointer is NULL)

C example:

[source,C]
----
const char *name = weechat_plugin_get_name (plugin);
----

Script (Python):

[source,python]
----
# prototype
name = weechat.plugin_get_name(plugin)

# example
plugin = weechat.buffer_get_pointer(weechat.current_buffer(), "plugin")
name = weechat.plugin_get_name(plugin)
----

[[strings]]
=== Strings

Many string functions below are already available thru standard C functions,
but it's recommended to use functions in this API because they are OK with
UTF-8 and locale.

==== charset_set

Set new plugin charset (default charset is _UTF-8_, so if your plugin uses
_UTF-8_, you don't need to call this function).

Prototype:

[source,C]
----
void weechat_charset_set (const char *charset);
----

Arguments:

* _charset_: new charset to use

C example:

[source,C]
----
weechat_charset_set ("iso-8859-1");
----

Script (Python):

[source,python]
----
# prototype
weechat.charset_set(charset)

# example
weechat.charset_set("iso-8859-1")
----

==== iconv_to_internal

Convert string to WeeChat internal charset (UTF-8).

Prototype:

[source,C]
----
char *weechat_iconv_to_internal (const char *charset, const char *string);
----

Arguments:

* _charset_: charset to convert
* _string_: string to convert

Return value:

* converted string (must be freed by calling "free" after use)

C example:

[source,C]
----
char *str = weechat_iconv_to_internal ("iso-8859-1", "iso string: é à");
/* ... */
free (str);
----

Script (Python):

[source,python]
----
# prototype
str = weechat.iconv_to_internal(charset, string)

# example
str = weechat.iconv_to_internal("iso-8859-1", "iso string: é à")
----

==== iconv_from_internal

Convert string from internal WeeChat charset (UTF-8) to another.

Prototype:

[source,C]
----
char *weechat_iconv_from_internal (const char *charset, const char *string);
----

Arguments:

* _charset_: target charset
* _string_: string to convert

Return value:

* converted string (must be freed by calling "free" after use)

C example:

[source,C]
----
char *str = weechat_iconv_from_internal ("iso-8859-1", "utf-8 string: é à");
/* ... */
free (str);
----

Script (Python):

[source,python]
----
# prototype
str = weechat.iconv_from_internal(charset, string)

# example
str = weechat.iconv_from_internal("iso-8859-1", "utf-8 string: é à")
----

==== gettext

Return translated string (depends on local language).

Prototype:

[source,C]
----
const char *weechat_gettext (const char *string);
----

Arguments:

* _string_: string to translate

Return value:

* translated string or _string_ if there is no translation available in local language

C example:

[source,C]
----
char *str = weechat_gettext ("hello");
----

Script (Python):

[source,python]
----
# prototype
str = weechat.gettext(string)

# example
str = weechat.gettext("hello")
----

==== ngettext

Return translated string, using single or plural form, according to _count_
argument.

Prototype:

[source,C]
----
const char *weechat_ngettext (const char *string, const char *plural,
                              int count);
----

Arguments:

* _string_: string to translate, single form
* _plural_: string to translate, plural form
* _count_: used to choose between single and plural form (choice is made
  according to local language)

Return value:

* translated string or _string_ / _plural_ if there is no translation available
  in local language

C example:

[source,C]
----
char *str = weechat_ngettext ("file", "files", num_files);
----

Script (Python):

[source,python]
----
# prototype
str = weechat.ngettext(string, plural, count)

# example
num_files = 2
str = weechat.ngettext("file", "files", num_files)
----

==== strndup

Return duplicated string, with _length_ chars max.

Prototype:

[source,C]
----
char *weechat_strndup (const char *string, int length);
----

Arguments:

* _string_: string to duplicate
* _length_: max chars to duplicate

Return value:

* duplicated string (must be freed by calling "free" after use)

C example:

[source,C]
----
char *str = weechat_strndup ("abcdef", 3);  /* result: "abc" */
/* ... */
free (str);
----

[NOTE]
This function is not available in scripting API.

==== string_tolower

Convert UTF-8 string to lower case.

Prototype:

[source,C]
----
void weechat_string_tolower (char *string);
----

Arguments:

* _string_: string to convert

C example:

[source,C]
----
char str[] = "AbCdé";
weechat_string_tolower (str);  /* str is now: "abcdé" */
----

[NOTE]
This function is not available in scripting API.

==== string_toupper

Convert UTF-8 string to upper case.

Prototype:

[source,C]
----
void weechat_string_toupper (char *string);
----

Arguments:

* _string_: string to convert

C example:

[source,C]
----
char str[] = "AbCdé";
weechat_string_toupper (str);  /* str is now: "ABCDé" */
----

[NOTE]
This function is not available in scripting API.

==== strcasecmp

_Updated in 1.0._

Locale and case independent string comparison.

Prototype:

[source,C]
----
int weechat_strcasecmp (const char *string1, const char *string2);
----

Arguments:

* _string1_: first string for comparison
* _string2_: second string for comparison

Return value:

* -1 if string1 < string2
* 0 if string1 == string2
* 1 if string1 > string2

C example:

[source,C]
----
int diff = weechat_strcasecmp ("aaa", "CCC");  /* == -2 */
----

[NOTE]
This function is not available in scripting API.

==== strcasecmp_range

_WeeChat ≥ 0.3.7, updated in 1.0._

Locale and case independent string comparison, using a range for case
comparison.

Prototype:

[source,C]
----
int weechat_strcasecmp_range (const char *string1, const char *string2, int range);
----

Arguments:

* _string1_: first string for comparison
* _string2_: second string for comparison
* _range_: number of chars in case comparison, for example:
** 26: `+A-Z+` are lowered to `+a-z+`
** 29: `+A-Z [ \ ]+` are lowered to `+a-z { | }+`
** 30: `+A-Z [ \ ] ^+` are lowered to `+a-z { | } ~+`

[NOTE]
Values 29 and 30 are used by some protocols like IRC.

Return value:

* -1 if string1 < string2
* 0 if string1 == string2
* 1 if string1 > string2

C example:

[source,C]
----
int diff = weechat_strcasecmp_range ("nick{away}", "NICK[away]", 29);  /* == 0 */
----

[NOTE]
This function is not available in scripting API.

==== strncasecmp

_Updated in 1.0._

Locale and case independent string comparison, for _max_ chars.

Prototype:

[source,C]
----
int weechat_strncasecmp (const char *string1, const char *string2, int max);
----

Arguments:

* _string1_: first string for comparison
* _string2_: second string for comparison
* _max_: max chars to compare

Return value:

* -1 if string1 < string2
* 0 if string1 == string2
* 1 if string1 > string2

C example:

[source,C]
----
int diff = weechat_strncasecmp ("aabb", "aacc", 2);  /* == 0 */
----

[NOTE]
This function is not available in scripting API.

==== strncasecmp_range

_WeeChat ≥ 0.3.7, updated in 1.0._

Locale and case independent string comparison, for _max_ chars, using a range
for case comparison.

Prototype:

[source,C]
----
int weechat_strncasecmp_range (const char *string1, const char *string2, int max, int range);
----

Arguments:

* _string1_: first string for comparison
* _string2_: second string for comparison
* _max_: max chars to compare
* _range_: number of chars in case comparison, for example:
** 26: `+A-Z+` are lowered to `+a-z+`
** 29: `+A-Z [ \ ]+` are lowered to `+a-z { | }+`
** 30: `+A-Z [ \ ] ^+` are lowered to `+a-z { | } ~+`

[NOTE]
Values 29 and 30 are used by some protocols like IRC.

Return value:

* -1 if string1 < string2
* 0 if string1 == string2
* 1 if string1 > string2

C example:

[source,C]
----
int diff = weechat_strncasecmp_range ("nick{away}", "NICK[away]", 6, 29);  /* == 0 */
----

[NOTE]
This function is not available in scripting API.

==== strcmp_ignore_chars

_Updated in 1.0._

Locale (and optionally case independent) string comparison, ignoring some
chars.

Prototype:

[source,C]
----
int weechat_strcmp_ignore_chars (const char *string1, const char *string2,
                                 const char *chars_ignored,
                                 int case_sensitive);
----

Arguments:

* _string1_: first string for comparison
* _string2_: second string for comparison
* _chars_ignored_: string with chars to ignored
* _case_sensitive_: 1 for case sensitive comparison, otherwise 0

Return value:

* -1 if string1 < string2
* 0 if string1 == string2
* 1 if string1 > string2

C example:

[source,C]
----
int diff = weechat_strcmp_ignore_chars ("a-b", "--a-e", "-", 1);  /* == -3 */
----

[NOTE]
This function is not available in scripting API.

==== strcasestr

_Updated in 1.3._

Locale and case independent string search.

Prototype:

[source,C]
----
const char *weechat_strcasestr (const char *string, const char *search);
----

Arguments:

* _string_: string
* _search_: string to search in _string_

Return value:

* pointer to string found, or NULL if not found
  (_WeeChat ≥ 1.3_: pointer returned is a _const char *_ instead of _char *_)

C example:

[source,C]
----
const char *pos = weechat_strcasestr ("aBcDeF", "de");  /* result: pointer to "DeF" */
----

[NOTE]
This function is not available in scripting API.

==== strlen_screen

_WeeChat ≥ 0.4.2._

Return number of chars needed on screen to display UTF-8 string.
Non-printable chars have a width of 1 (this is the difference with the function
<<_utf8_strlen_screen,utf8_strlen_screen>>).

Prototype:

[source,C]
----
int weechat_strlen_screen (const char *string);
----

Arguments:

* _string_: string

Return value:

* number of chars needed on screen to display UTF-8 string

C example:

[source,C]
----
int length_on_screen = weechat_strlen_screen ("é");  /* == 1 */
----

Script (Python):

[source,python]
----
# prototype
length = weechat.strlen_screen(string)

# example
length = weechat.strlen_screen("é")  # 1
----

==== string_match

_Updated in 1.0._

Check if a string matches a mask.

Prototype:

[source,C]
----
int weechat_string_match (const char *string, const char *mask,
                          int case_sensitive);
----

Arguments:

* _string_: string
* _mask_: mask with wildcards (`+*+`), each wildcard matches 0 or more chars in
  the string
* _case_sensitive_: 1 for case sensitive comparison, otherwise 0

[NOTE]
Since version 1.0, wildcards are allowed inside the mask
(not only beginning/end of mask).

Return value:

* 1 if string matches mask, otherwise 0

C example:

[source,C]
----
int match1 = weechat_string_match ("abcdef", "abc*", 0);   /* == 1 */
int match2 = weechat_string_match ("abcdef", "*dd*", 0);   /* == 0 */
int match3 = weechat_string_match ("abcdef", "*def", 0);   /* == 1 */
int match4 = weechat_string_match ("abcdef", "*de*", 0);   /* == 1 */
int match5 = weechat_string_match ("abcdef", "*b*d*", 0);  /* == 1 */
----

Script (Python):

[source,python]
----
# prototype
match = weechat.string_match(string, mask, case_sensitive)

# examples
match1 = weechat.string_match("abcdef", "abc*", 0)   # == 1
match2 = weechat.string_match("abcdef", "*dd*", 0)   # == 0
match3 = weechat.string_match("abcdef", "*def", 0)   # == 1
match4 = weechat.string_match("abcdef", "*de*", 0)   # == 1
match5 = weechat.string_match("abcdef", "*b*d*", 0)  # == 1
----

==== string_match_list

_WeeChat ≥ 2.5._

Check if a string matches a list of masks where negative mask is allowed
with the format "!word". A negative mask has higher priority than a standard
mask.

Prototype:

[source,C]
----
int weechat_string_match_list (const char *string, const char **masks,
                               int case_sensitive);
----

Arguments:

* _string_: string
* _masks_: list of masks, with a NULL after the last mask in list; each mask
  is compared to the string with the function <<_string_match,string_match>>
* _case_sensitive_: 1 for case sensitive comparison, otherwise 0

Return value:

* 1 if string matches list of masks (at least one mask matches and no negative
  mask matches), otherwise 0

C example:

[source,C]
----
const char *masks[3] = { "*", "!abc*", NULL };
int match1 = weechat_string_match_list ("abc", masks, 0);     /* == 0 */
int match2 = weechat_string_match_list ("abcdef", masks, 0);  /* == 0 */
int match3 = weechat_string_match_list ("def", masks, 0);     /* == 1 */
----

Script (Python):

[source,python]
----
# prototype
match = weechat.string_match_list(string, masks, case_sensitive)

# examples
match1 = weechat.string_match("abc", "*,!abc*", 0)     # == 0
match2 = weechat.string_match("abcdef", "*,!abc*", 0)  # == 0
match3 = weechat.string_match("def", "*,!abc*", 0)     # == 1
----

==== string_expand_home

_WeeChat ≥ 0.3.3._

Replace leading `+~+` by string with home directory. If string does not start
with `+~+`, then same string is returned.

Prototype:

[source,C]
----
char *weechat_string_expand_home (const char *path);
----

Arguments:

* _path_: path

Return value:

* path with leading `+~+` replaced by home directory (must be freed by calling
  "free" after use)

C example:

[source,C]
----
char *str = weechat_string_expand_home ("~/file.txt");
/* result: "/home/xxx/file.txt" */
/* ... */
free (str);
----

[NOTE]
This function is not available in scripting API.

==== string_eval_path_home

_WeeChat ≥ 1.3._

Evaluate a path in 3 steps:

. replace leading `%h` by WeeChat home directory,
. replace leading `+~+` by user home directory (call to
  <<_string_expand_home,string_expand_home>>),
. evaluate variables (see <<_string_eval_expression,string_eval_expression>>).

Prototype:

[source,C]
----
char *weechat_string_eval_path_home (const char *path,
                                     struct t_hashtable *pointers,
                                     struct t_hashtable *extra_vars,
                                     struct t_hashtable *options);
----

Arguments:

* _path_: path
* _pointers_: hashtable for call to function
  <<_string_eval_expression,string_eval_expression>>
* _extra_vars_: hashtable for call to function
  <<_string_eval_expression,string_eval_expression>>
* _options_: hashtable for call to function
  <<_string_eval_expression,string_eval_expression>>

Return value:

* evaluated path (must be freed by calling "free" after use)

C example:

[source,C]
----
char *str = weechat_string_eval_path_home ("%h/test", NULL, NULL, NULL);
/* result: "/home/xxx/.weechat/test" */
/* ... */
free (str);
----

Script (Python):

[source,python]
----
# prototype
path = weechat.string_eval_path_home(path, pointers, extra_vars, options)

# example
path = weechat.string_eval_path_home("%h/test", {}, {}, {})
# path == "/home/xxx/.weechat/test"
----

==== string_remove_quotes

Remove quotes at beginning and end of string (ignore spaces if there are before
first quote or after last quote).

Prototype:

[source,C]
----
char *weechat_string_remove_quotes (const char *string, const char *quotes);
----

Arguments:

* _string_: string
* _quotes_: string with list of quotes

Return value:

* string without quotes at beginning/end (must be freed by calling "free"
  after use)

C example:

[source,C]
----
char *str = weechat_string_remove_quotes (string, " 'I can't' ", "'");
/* result: "I can't" */
/* ... */
free (str);
----

[NOTE]
This function is not available in scripting API.

==== string_strip

Strip chars at beginning and/or end of string.

Prototype:

[source,C]
----
char *weechat_string_strip (const char *string, int left, int right,
                            const char *chars);
----

Arguments:

* _string_: string
* _left_: strip left chars if different from 0
* _right_: strip right chars if different from 0
* _chars_: string with chars to strip

Return value:

* stripped string (must be freed by calling "free" after use)

C example:

[source,C]
----
char *str = weechat_string_strip (".abc -", 0, 1, "- .");  /* result: ".abc" */
/* ... */
free (str);
----

[NOTE]
This function is not available in scripting API.

==== string_convert_escaped_chars

_WeeChat ≥ 1.0._

Convert escaped chars to their value:

* `+\"+`: double quote
* `+\\+`: backslash
* `+\a+`: alert (BEL)
* `+\b+`: backspace
* `+\e+`: escape
* `+\f+`: form feed
* `+\n+`: new line
* `+\r+`: carriage return
* `+\t+`: horizontal tab
* `+\v+`: vertical tab
* `+\0ooo+`: char as octal value (`ooo` is 0 to 3 digits)
* `+\xhh+`: char as hexadecimal value (`hh` is 1 to 2 digits)
* `+\uhhhh+`: unicode char as hexadecimal value (`hhhh` is 1 to 4 digits)
* `+\Uhhhhhhhh+`: unicode char as hexadecimal value (`hhhhhhhh` is 1 to 8 digits)

Prototype:

[source,C]
----
char *weechat_string_convert_escaped_chars (const char *string);
----

Arguments:

* _string_: string

Return value:

* string with escaped chars replaced by their value (must be freed by calling
  "free" after use)

C example:

[source,C]
----
char *str = weechat_string_convert_escaped_chars ("snowman: \\u2603");
/* str == "snowman: ☃" */
/* ... */
free (str);
----

[NOTE]
This function is not available in scripting API.

==== string_mask_to_regex

Return a regex, built with a mask, where only special char is `+*+`. All other
special chars for regex are escaped.

Prototype:

[source,C]
----
char *weechat_string_mask_to_regex (const char *mask);
----

Arguments:

* _mask_: mask

Return value:

* regular expression, as string (must be freed by calling "free" after use)

C example:

[source,C]
----
char *str_regex = weechat_string_mask_to_regex ("test*mask");
/* result: "test.*mask" */
/* ... */
free (str_regex);
----

Script (Python):

[source,python]
----
# prototype
regex = weechat.string_mask_to_regex(mask)

# example
regex = weechat.string_mask_to_regex("test*mask")  # "test.*mask"
----

==== string_regex_flags

_WeeChat ≥ 0.3.7._

Get pointer on string after flags and mask with flags to compile regular
expression.

Prototype:

[source,C]
----
const char *weechat_string_regex_flags (const char *regex, int default_flags, int *flags)
----

Arguments:

* _regex_: POSIX extended regular expression
* _default_flags_: combination of following values (see `man regcomp`):
** REG_EXTENDED
** REG_ICASE
** REG_NEWLINE
** REG_NOSUB
* _flags_: pointer value is set with flags used in regular expression (default
  flags + flags set in regular expression)

Flags must be at beginning of regular expression. Format is:
"(?eins-eins)string".

Allowed flags are:

* _e_: POSIX extended regular expression (_REG_EXTENDED_)
* _i_: case insensitive (_REG_ICASE_)
* _n_: match-any-character operators don't match a newline (_REG_NEWLINE_)
* _s_: support for substring addressing of matches is not required (_REG_NOSUB_)

Return value:

* pointer in _regex_, after flags

C example:

[source,C]
----
const char *regex = "(?i)test";
int flags;
const char *ptr_regex = weechat_string_regex_flags (regex, REG_EXTENDED, &flags);
/* ptr_regex == "test", flags == REG_EXTENDED | REG_ICASE */
----

[NOTE]
This function is not available in scripting API.

==== string_regcomp

_WeeChat ≥ 0.3.7._

Compile a POSIX extended regular expression using optional flags at beginning
of string (for format of flags, see
<<_string_regex_flags,string_regex_flags>>).

Prototype:

[source,C]
----
int weechat_string_regcomp (void *preg, const char *regex, int default_flags)
----

Arguments:

* _preg_: pointer to _regex_t_ structure
* _regex_: POSIX extended regular expression
* _default_flags_: combination of following values (see `man regcomp`):
** REG_EXTENDED
** REG_ICASE
** REG_NEWLINE
** REG_NOSUB

Return value:

* same return code as function `regcomp` (0 if OK, other value for error,
  see `man regcomp`)

C example:

[source,C]
----
regex_t my_regex;
if (weechat_string_regcomp (&my_regex, "(?i)test", REG_EXTENDED) != 0)
{
    /* error */
}
----

[NOTE]
This function is not available in scripting API.

==== string_has_highlight

Check if a string has one or more highlights, using list of highlight words.

Prototype:

[source,C]
----
int weechat_string_has_highlight (const char *string,
                                  const char highlight_words);
----

Arguments:

* _string_: string
* _highlight_words_: list of highlight words, separated by comma

Return value:

* 1 if string has one or more highlights, otherwise 0

C example:

[source,C]
----
int hl = weechat_string_has_highlight ("my test string", "test,word2");  /* == 1 */
----

Script (Python):

[source,python]
----
# prototype
highlight = weechat.string_has_highlight(string, highlight_words)

# example
highlight = weechat.string_has_highlight("my test string", "test,word2")  # 1
----

==== string_has_highlight_regex

_WeeChat ≥ 0.3.4._

Check if a string has one or more highlights, using a POSIX extended regular
expression. +
For at least one match of regular expression on string, it must be surrounded
by delimiters (chars different from: alphanumeric, `+-+`, `+_+` and `+|+`).

Prototype:

[source,C]
----
int weechat_string_has_highlight_regex (const char *string, const char *regex);
----

Arguments:

* _string_: string
* _regex_: POSIX extended regular expression

Return value:

* 1 if string has one or more highlights, otherwise 0

C example:

[source,C]
----
int hl = weechat_string_has_highlight_regex ("my test string", "test|word2");  /* == 1 */
----

Script (Python):

[source,python]
----
# prototype
highlight = weechat.string_has_highlight_regex(string, regex)

# example
highlight = weechat.string_has_highlight_regex("my test string", "test|word2")  # 1
----

==== string_replace

Replace all occurrences of a string by another string.

Prototype:

[source,C]
----
char *weechat_string_replace (const char *string, const char *search,
                              const char *replace);
----

Arguments:

* _string_: string
* _search_: string to replace
* _replace_: replacement for string _search_

Return value:

* string with _search_ replaced by _replace_ (must be freed by calling "free"
  after use)

C example:

[source,C]
----
char *str = weechat_string_replace ("test", "s", "x");  /* result: "text" */
/* ... */
free (str);
----

[NOTE]
This function is not available in scripting API.

==== string_replace_regex

_WeeChat ≥ 1.0._

Replace text in a string using a regular expression, replacement text and
optional callback.

Prototype:

[source,C]
----
char *weechat_string_replace_regex (const char *string, void *regex,
                                    const char *replace, const char reference_char,
                                    char *(*callback)(void *data, const char *text),
                                    void *callback_data);
----

Arguments:

* _string_: string
* _regex_: pointer to a regular expression (_regex_t_ structure) compiled with
  WeeChat function <<_string_regcomp,string_regcomp>> or regcomp (see `man regcomp`)
* _replace_: replacement text, where following references are allowed:
** `+$0+` to `+$99+`: match 0 to 99 in regular expression (0 is the whole match,
   1 to 99 are groups captured between parentheses)
** `+$++`: the last match (with highest number)
** `+$.*N+`: match `+N+` (can be `+++` or `+0+` to `+99+`), with all chars
   replaced by `+*+` (the `+*+` char can be any char between space (32) and
   `+~+` (126))
* _reference_char_: the char used for reference to match (commonly `+$+`)
* _callback_: an optional callback called for each reference in _replace_
  (except for matches replaced by a char); the callback must return:
** newly allocated string: it is used as replacement text (it is freed after
   use)
** NULL: the text received in callback is used as replacement text (without
   changes)
* _callback_data_: pointer given to callback when it is called

Return value:

* string with text replaced, NULL if problem (must be freed by calling "free"
  after use)

C example:

[source,C]
----
regex_t my_regex;
char *string;
if (weechat_string_regcomp (&my_regex, "([0-9]{4})-([0-9]{2})-([0-9]{2})",
                            REG_EXTENDED) == 0)
{
    string = weechat_string_replace_regex ("date: 2014-02-14", &my_regex,
                                           "$3/$2/$1", '$', NULL, NULL);
    /* string == "date: 14/02/2014" */
    if (string)
        free (string);
    regfree (&my_regex);
}
----

[NOTE]
This function is not available in scripting API.

==== string_split

_Updated in 2.5, 2.6._

Split a string according to one or more delimiter(s).

Prototype:

[source,C]
----
char **weechat_string_split (const char *string, const char *separators,
                             const char *strip_items, int flags,
                             int num_items_max, int *num_items);
----

Arguments:

* _string_: string to split
* _separators_: delimiters used for split
* _strip_items_: chars to strip from returned items (left/right);
  optional, can be NULL
* _flags_: combination values to change the default behavior; if the value is 0,
  the default behavior is used (no strip of separators at beginning/end of string,
  multiple separators are kept as-is so empty strings can be returned);
  the following flags are accepted:
** WEECHAT_STRING_SPLIT_STRIP_LEFT: strip separators on the left
   (beginning of string)
** WEECHAT_STRING_SPLIT_STRIP_RIGHT: strip separators on the right
   (end of string)
** WEECHAT_STRING_SPLIT_COLLAPSE_SEPS: collapse multiple consecutive separators
   into a single one
** WEECHAT_STRING_SPLIT_KEEP_EOL: keep end of line for each value
* _num_items_max_: maximum number of items created (0 = no limit)
* _num_items_: pointer to int which will contain number of items created

[NOTE]
With WeeChat ≤ 2.4, the _flags_ argument was called _keep_eol_ and took other
values, which must be converted like that:
[width="100%",cols="1,10",options="header"]
|===
| keep_eol | flags
| 0        | WEECHAT_STRING_SPLIT_STRIP_LEFT \| WEECHAT_STRING_SPLIT_STRIP_RIGHT \| WEECHAT_STRING_SPLIT_COLLAPSE_SEPS
| 1        | WEECHAT_STRING_SPLIT_STRIP_LEFT \| WEECHAT_STRING_SPLIT_STRIP_RIGHT \| WEECHAT_STRING_SPLIT_COLLAPSE_SEPS \| WEECHAT_STRING_SPLIT_KEEP_EOL
| 2        | WEECHAT_STRING_SPLIT_STRIP_LEFT \| WEECHAT_STRING_SPLIT_COLLAPSE_SEPS \| WEECHAT_STRING_SPLIT_KEEP_EOL
|===

Return value:

* array of strings, NULL if problem (must be freed by calling
  <<_string_free_split,string_free_split>> after use)

C example:

[source,C]
----
char **argv;
int argc;

argv = weechat_string_split ("abc de  fghi ", " ", NULL, 0, 0, &argc);
/* result: argv[0] == "abc"
           argv[1] == "de"
           argv[2] == ""
           argv[3] == "fghi"
           argv[4] = ""
           argv[5] == NULL
           argc == 5
*/
weechat_string_free_split (argv);

argv = weechat_string_split ("abc de  fghi ", " ", NULL,
                             WEECHAT_STRING_SPLIT_STRIP_LEFT
                             | WEECHAT_STRING_SPLIT_STRIP_RIGHT
                             | WEECHAT_STRING_SPLIT_COLLAPSE_SEPS,
                             0, &argc);
/* result: argv[0] == "abc"
           argv[1] == "de"
           argv[2] == "fghi"
           argv[3] == NULL
           argc == 3
*/
weechat_string_free_split (argv);

argv = weechat_string_split ("abc de  fghi ", " ", NULL,
                             WEECHAT_STRING_SPLIT_STRIP_LEFT
                             | WEECHAT_STRING_SPLIT_STRIP_RIGHT
                             | WEECHAT_STRING_SPLIT_COLLAPSE_SEPS
                             | WEECHAT_STRING_SPLIT_KEEP_EOL,
                             0, &argc);
/* result: argv[0] == "abc de  fghi"
           argv[1] == "de  fghi"
           argv[2] == "fghi"
           argv[3] == NULL
           argc == 3
*/
weechat_string_free_split (argv);

argv = weechat_string_split ("abc de  fghi ", " ", NULL,
                             WEECHAT_STRING_SPLIT_STRIP_LEFT
                             | WEECHAT_STRING_SPLIT_COLLAPSE_SEPS
                             | WEECHAT_STRING_SPLIT_KEEP_EOL,
                             0, &argc);
/* result: argv[0] == "abc de  fghi "
           argv[1] == "de  fghi "
           argv[2] == "fghi "
           argv[3] == NULL
           argc == 3
*/
weechat_string_free_split (argv);

argv = weechat_string_split (" abc, de,, fghi ", ",", " ",
                             WEECHAT_STRING_SPLIT_STRIP_LEFT
                             | WEECHAT_STRING_SPLIT_STRIP_RIGHT
                             | WEECHAT_STRING_SPLIT_COLLAPSE_SEPS,
                             0, &argc);
/* result: argv[0] == "abc"
           argv[1] == "de"
           argv[2] == "fghi"
           argv[3] == NULL
           argc == 3
*/
weechat_string_free_split (argv);
----

[NOTE]
This function is not available in scripting API.

==== string_split_shell

_WeeChat ≥ 1.0._

Split a string like the shell does for a command with arguments.

This function is a C conversion of Python class "shlex" (file: Lib/shlex.py in
Python repository), see: https://docs.python.org/3/library/shlex.html.

Prototype:

[source,C]
----
char **weechat_string_split_shell (const char *string, int *num_items);
----

Arguments:

* _string_: string to split
* _num_items_: pointer to int which will contain number of items created

Return value:

* array of strings, NULL if problem (must be freed by calling
  <<_string_free_split,string_free_split>> after use)

C example:

[source,C]
----
char **argv;
int argc;
argv = weechat_string_split_shell ("test 'first arg'  \"second arg\"", &argc);
/* result: argv[0] == "test"
           argv[1] == "first arg"
           argv[2] == "second arg"
           argv[3] == NULL
           argc == 3
*/
weechat_string_free_split (argv);
----

[NOTE]
This function is not available in scripting API.

==== string_free_split

Free memory used by a split string.

Prototype:

[source,C]
----
void weechat_string_free_split (char **split_string);
----

Arguments:

* _split_string_: string split by function <<_string_split,string_split>>

C example:

[source,C]
----
char *argv;
int argc;
argv = weechat_string_split (string, " ", 0, 0, &argc);
/* ... */
weechat_string_free_split (argv);
----

[NOTE]
This function is not available in scripting API.

==== string_build_with_split_string

Build a string with a split string.

Prototype:

[source,C]
----
char *weechat_string_build_with_split_string (char **split_string,
                                              const char *separator);
----

Arguments:

* _split_string_: string split by function <<_string_split,string_split>>
* _separator_: string used to separate strings

Return value:

* string built with split string (must be freed by calling "free" after use)

C example:

[source,C]
----
char **argv;
int argc;
argv = weechat_string_split ("abc def ghi", " ", 0, 0, &argc);
char *str = weechat_string_build_with_split_string (argv, ";");
/* str == "abc;def;ghi" */
/* ... */
free (str);
----

[NOTE]
This function is not available in scripting API.

==== string_split_command

Split a list of commands separated by _separator_ (which can be escaped by `+\+`
in string).

Prototype:

[source,C]
----
char **weechat_string_split_command (const char *command, char separator);
----

Arguments:

* _command_: command to split
* _separator_: separator

Return value:

* array of strings, NULL if problem (must be freed by calling
  <<_free_split_command,free_split_command>> after use)

C example:

[source,C]
----
char **argv = weechat_string_split_command ("/command1 arg;/command2", ';');
/* result: argv[0] == "/command1 arg"
           argv[1] == "/command2"
           argv[2] == NULL
*/
weechat_free_split_command (argv);
----

[NOTE]
This function is not available in scripting API.

==== string_free_split_command

Free memory used by a split command.

Prototype:

[source,C]
----
void weechat_string_free_split_command (char **split_command);
----

Arguments:

* _split_command_: command split by <<_string_split_command,string_split_command>>

C example:

[source,C]
----
char **argv = weechat_string_split_command ("/command1 arg;/command2", ';');
/* ... */
weechat_free_split_command (argv);
----

[NOTE]
This function is not available in scripting API.

==== string_format_size

Build a string with formatted file size and a unit translated to local
language.

Prototype:

[source,C]
----
char *weechat_string_format_size (unsigned long long size);
----

Arguments:

* _size_: size (in bytes)

Return value:

* formatted string (must be freed by calling "free" after use)

C examples:

[source,C]
----
/* examples with English locale */

char *str = weechat_string_format_size (0);  /* str == "0 bytes" */
/* ... */
free (str);

char *str = weechat_string_format_size (1);  /* str == "1 byte" */
/* ... */
free (str);

char *str = weechat_string_format_size (200);  /* str == "200 bytes" */
/* ... */
free (str);

char *str = weechat_string_format_size (15200);  /* str == "15.2 KB" */
/* ... */
free (str);

char *str = weechat_string_format_size (2097152);  /* str == "2.10 MB" */
/* ... */
free (str);
----

Script (Python), _WeeChat ≥ 2.2_:

[source,python]
----
# prototype
str = weechat.string_format_size(size)

# example
str = weechat.string_format_size(15200)  # == "15.2 KB"
----

==== string_remove_color

Remove WeeChat colors from a string.

Prototype:

[source,C]
----
char *weechat_string_remove_color (const char *string,
                                   const char *replacement);
----

Arguments:

* _string_: string
* _replacement_: if not NULL and not empty, WeeChat color codes are replaced by
  first char of this string, otherwise WeeChat color codes and following chars
  (if related to color) are removed from string

Return value:

* string without color (must be freed by calling "free" after use)

C examples:

[source,C]
----
/* remove color codes */
char *str = weechat_string_remove_color (my_string1, NULL);
/* ... */
free (str);

/* replace color codes by "?" */
char *str = weechat_string_remove_color (my_string2, "?");
/* ... */
free (str);
----

Script (Python):

[source,python]
----
# prototype
str = weechat.string_remove_color(string, replacement)

# example
str = weechat.string_remove_color(my_string, "?")
----

==== string_base_encode

_WeeChat ≥ 2.4._

Encode a string in base 16, 32, or 64.

Prototype:

[source,C]
----
int weechat_string_base_encode (int base, const char *from, int length, char *to);
----

Arguments:

* _base_: 16, 32, or 64
* _from_: string to encode
* _length_: length of string to encode (for example `strlen(from)`)
* _to_: pointer to string to store result (must be long enough, result is
  longer than initial string)

Return value:

* length of string stored in _*to_ (does not count final `\0`), -1 if error

C example:

[source,C]
----
char *string = "abcdefgh", result[128];
int length;
length = weechat_string_base_encode (16, string, strlen (string), result);
/* length == 16, result == "6162636465666768" */
length = weechat_string_base_encode (32, string, strlen (string), result);
/* length == 16, result == "MFRGGZDFMZTWQ===" */
length = weechat_string_base_encode (64, string, strlen (string), result);
/* length == 12, result == "YWJjZGVmZ2g=" */
----

[NOTE]
This function is not available in scripting API.

==== string_base_decode

_WeeChat ≥ 2.4._

Decode a string encoded in base 16, 32, or 64.

Prototype:

[source,C]
----
int weechat_string_base_decode (int base, const char *from, char *to);
----

Arguments:

* _base_: 16, 32, or 64
* _from_: string to decode
* _to_: pointer to string to store result (must be long enough, result is
  shorter than initial string)

Return value:

* length of string stored in _*to_ (does not count final `\0`), -1 if error

C example:

[source,C]
----
char result[128];
int length;
length = weechat_string_base_decode (16, "6162636465666768", result);
/* length == 8, result == "abcdefgh" */
length = weechat_string_base_decode (32, "MFRGGZDFMZTWQ===", result);
/* length == 8, result == "abcdefgh" */
length = weechat_string_base_decode (64, "YWJjZGVmZ2g=", result);
/* length == 8, result == "abcdefgh" */
----

[NOTE]
This function is not available in scripting API.

==== string_hex_dump

_WeeChat ≥ 1.4._

Display a dump of data as hexadecimal and ascii bytes.

Prototype:

[source,C]
----
char *string_hex_dump (const char *data, int data_size, int bytes_per_line,
                       const char *prefix, const char *suffix);
----

Arguments:

* _data_: the data to dump
* _data_size_: number of bytes to dump in _data_
* _bytes_per_line_: number of bytes to display in each line
* _prefix_: the prefix to display at the beginning of each line
  (optional, can be NULL)
* _suffix_: the suffix to display at the end of each line
  (optional, can be NULL)

Return value:

* string with dump of data (must be freed by calling "free" after use)

C example:

[source,C]
----
char *string = "abc def-ghi";
char *dump = weechat_string_hex_dump (string, strlen (string), 8, " >> ", NULL);
/* dump == " >> 61 62 63 20 64 65 66 2D   a b c   d e f - \n"
           " >> 67 68 69                  g h i           "  */
----

[NOTE]
This function is not available in scripting API.

==== string_is_command_char

_WeeChat ≥ 0.3.2._

Check if first char of string is a command char (default command char is `+/+`).

Prototype:

[source,C]
----
int weechat_string_is_command_char (const char *string);
----

Arguments:

* _string_: string

Return value:

* 1 if first char of string is a command char, otherwise 0

C examples:

[source,C]
----
int command_char1 = weechat_string_is_command_char ("/test");  /* == 1 */
int command_char2 = weechat_string_is_command_char ("test");   /* == 0 */
----

Script (Python):

[source,python]
----
# prototype
is_cmdchar = weechat.string_is_command_char(string)

# examples
command_char1 = weechat.string_is_command_char("/test")  # == 1
command_char2 = weechat.string_is_command_char("test")   # == 0
----

==== string_input_for_buffer

_WeeChat ≥ 0.3.2._

Return pointer to input text for buffer (pointer inside "string" argument), or
NULL if it's a command.

Prototype:

[source,C]
----
const char *weechat_string_input_for_buffer (const char *string);
----

Arguments:

* _string_: string

Return value:

* pointer into "string", or NULL

C examples:

[source,C]
----
const char *str1 = weechat_string_input_for_buffer ("test");    /* "test"  */
const char *str2 = weechat_string_input_for_buffer ("/test");   /* NULL    */
const char *str3 = weechat_string_input_for_buffer ("//test");  /* "/test" */
----

Script (Python):

[source,python]
----
# prototype
str = weechat.string_input_for_buffer(string)

# examples
str1 = weechat.string_input_for_buffer("test")    # "test"
str2 = weechat.string_input_for_buffer("/test")   # ""
str3 = weechat.string_input_for_buffer("//test")  # "/test"
----

==== string_eval_expression

_WeeChat ≥ 0.4.0, updated in 0.4.2, 0.4.3, 1.0, 1.1, 1.2, 1.3, 1.6, 1.8, 2.0, 2.2, 2.3 and 2.7._

Evaluate an expression and return result as a string.
Special variables with format `+${variable}+` are expanded (see table below).

[NOTE]
Since version 1.0, nested variables are supported, for example:
`+${color:${variable}}+`.

Prototype:

[source,C]
----
char *weechat_string_eval_expression (const char *expr,
                                      struct t_hashtable *pointers,
                                      struct t_hashtable *extra_vars,
                                      struct t_hashtable *options);
----

Arguments:

* _expr_: the expression to evaluate (see <<eval_conditions,conditions>> and
  <<eval_variables,variables>>)
* _pointers_: hashtable with pointers (keys must be string, values must be
  pointer); pointers "window" and "buffer" are automatically added if they are
  not in hashtable (with pointer to current window/buffer) (can be NULL):
** _regex_: pointer to a regular expression (_regex_t_ structure) compiled with
   WeeChat function <<_string_regcomp,string_regcomp>> or regcomp (see `man regcomp`);
   this option is similar to _regex_ in hashtable _options_ (below),
   but is used for better performance
* _extra_vars_: extra variables that will be expanded (can be NULL)
* _options_: a hashtable with some options (keys and values must be string)
  (can be NULL):
** _type_: default behavior is just to replace values in expression, other
   types can be selected:
*** _condition_: the expression is evaluated as a condition: operators and
    parentheses are used, result is a boolean ("0" or "1")
** _prefix_: prefix before variables to replace (default: `+${+`)
** _suffix_: suffix after variables to replace (default: `+}+`)
** _extra_: default behavior is to just replace extra variables (_extra_vars_),
   other behavior can be selected:
*** _eval_: extra variables (_extra_vars_) are evaluated themselves before
    replacing _(WeeChat ≥ 1.6)_
** _regex_: a regex used to replace text in _expr_ (which is then not
   evaluated)
** _regex_replace_: the replacement text to use with _regex_, to replace
   text in _expr_ (the _regex_replace_ is evaluated on each match of _regex_
   against _expr_, until no match is found)

Return value:

* evaluated expression (must be freed by calling "free" after use), or NULL
  if problem (invalid expression or not enough memory)

C examples:

[source,C]
----
/* conditions */
struct t_hashtable *options1 = weechat_hashtable_new (8,
                                                      WEECHAT_HASHTABLE_STRING,
                                                      WEECHAT_HASHTABLE_STRING,
                                                      NULL,
                                                      NULL);
weechat_hashtable_set (options1, "type", "condition");
char *str1 = weechat_string_eval_expression ("${window.win_width} > 100", NULL, NULL, options1);  /* "1" */
char *str2 = weechat_string_eval_expression ("abc =~ def", NULL, NULL, options1);                 /* "0" */

/* simple expression */
char *str3 = weechat_string_eval_expression ("${buffer.full_name}", NULL, NULL, NULL);  /* "core.weechat" */

/* replace with regex */
struct t_hashtable *options2 = weechat_hashtable_new (8,
                                                      WEECHAT_HASHTABLE_STRING,
                                                      WEECHAT_HASHTABLE_STRING,
                                                      NULL,
                                                      NULL);
/* add brackets around URLs */
weechat_hashtable_set (options2, "regex", "[a-zA-Z0-9_]+://[^ ]+");
weechat_hashtable_set (options2, "regex_replace", "[ ${re:0} ]");
char *str4 = weechat_string_eval_expression ("test: https://weechat.org", NULL, NULL, NULL);  /* "test: [ https://weechat.org ]" */

/* hide passwords */
weechat_hashtable_set (options2, "regex", "(password=)([^ ]+)");
weechat_hashtable_set (options2, "regex_replace", "${re:1}${hide:*,${re:2}}");
char *str5 = weechat_string_eval_expression ("password=abc password=def", NULL, NULL, NULL);  /* "password=*** password=***" */
----

Script (Python):

[source,python]
----
# prototype
str = weechat.string_eval_expression(expr, pointers, extra_vars, options)

# examples

# conditions
str1 = weechat.string_eval_expression("${window.win_width} > 100", {}, {}, {"type": "condition"})  # "1"
str2 = weechat.string_eval_expression("abc =~ def", {}, {}, {"type": "condition"})                 # "0"

# simple expression
str3 = weechat.string_eval_expression("${buffer.full_name}", {}, {}, {}) # "core.weechat"

# replace with regex: add brackets around URLs
options = {
    "regex": "[a-zA-Z0-9_]+://[^ ]+",
    "regex_replace": "[ ${re:0} ]",
}
str4 = weechat.string_eval_expression("test: https://weechat.org", {}, {}, options)  # "test: [ https://weechat.org ]"

# replace with regex: hide passwords
options = {
    "regex": "(password=)([^ ]+)",
    "regex_replace": "${re:1}${hide:*,${re:2}}",
}
str5 = weechat.string_eval_expression("password=abc password=def", {}, {}, options)  # "password=*** password=***"
----

[[eval_conditions]]
===== Conditions

List of logical operators that can be used in conditions (by order of priority,
from first used to last):

[width="100%",cols="2,8,4,4",options="header"]
|===
| Operator | Description | Examples | Results

| `+&&+` |
  Logical "and" |
  `+25 && 77+` +
  `+25 && 0+` |
  `+1+` +
  `+0+`

| `+\|\|+` |
  Logical "or" |
  `+25 \|\| 0+` +
  `+0 \|\| 0+` |
  `+1+` +
  `+0+`
|===

List of comparison operators that can be used in conditions (by order of priority,
from first used to last):

[width="100%",cols="2,8,4,4",options="header"]
|===
| Operator | Description | Examples | Results

| `+=~+` |
  Is matching POSIX extended regex (optional flags are allowed, see function <<_string_regcomp,string_regcomp>>) |
  `+abc def =~ ab.*ef+` +
  `+abc def =~ y.*z+` |
  `+1+` +
  `+0+`

| `+!~+` |
  Is NOT matching POSIX extended regex (optional flags are allowed, see function <<_string_regcomp,string_regcomp>>) |
  `+abc def !~ ab.*ef+` +
  `+abc def !~ y.*z+` |
  `+0+` +
  `+1+`

| `+=*+` +
  _(WeeChat ≥ 1.8)_ |
  Is matching mask where "*" is allowed (see function <<_string_match,string_match>>) |
  `+abc def =* a*f+` +
  `+abc def =* y*z+` |
  `+1+` +
  `+0+`

| `+!*+` +
  _(WeeChat ≥ 1.8)_ |
  Is NOT wildcard mask where "*" is allowed (see function <<_string_match,string_match>>) |
  `+abc def !* a*f+` +
  `+abc def !* y*z+` |
  `+0+` +
  `+1+`

| `+==+` |
  Equal |
  `+test == test+` +
  `+test == string+` |
  `+1+` +
  `+0+`

| `+!=+` |
  Not equal |
  `+test != test+` +
  `+test != string+` |
  `+0+` +
  `+1+`

| `+<=+` |
  Less or equal |
  `+abc <= defghi+` +
  `+abc <= abc+` +
  `+defghi <= abc+` +
  `+15 <= 2+` |
  `+1+` +
  `+1+` +
  `+0+` +
  `+0+`

| `+<+` |
  Less |
  `+abc < defghi+` +
  `+abc < abc+` +
  `+defghi < abc+` +
  `+15 < 2+` |
  `+1+` +
  `+0+` +
  `+0+` +
  `+0+`

| `+>=+` |
  Greater or equal |
  `+defghi >= abc+` +
  `+abc >= abc+` +
  `+abc >= defghi+` +
  `+15 >= 2+` |
  `+1+` +
  `+1+` +
  `+0+` +
  `+1+`

| `+>+` |
  Greater |
  `+defghi > abc+` +
  `+abc > abc+` +
  `+abc > defghi+` +
  `+15 > 2+` |
  `+1+` +
  `+0+` +
  `+0+` +
  `+1+`
|===

The comparison is made using floating point numbers if the two expressions are
valid numbers, with one of the following formats:

* integer (examples: 5, -7)
* floating point number (examples: 5.2, -7.5, 2.83e-2) _(WeeChat ≥ 2.0)_
* hexadecimal number (examples: 0xA3, -0xA3) _(WeeChat ≥ 2.0)_

To force a string comparison, you can add double quotes around each expression,
for example:

* `50 > 100` returns 0 (number comparison)
* `"50" > "100"` returns 1 (string comparison)

[[eval_variables]]
===== Variables

List of variables expanded in expression (by order of priority, from first
expanded to last):

[width="100%",cols="2,8,4,4",options="header"]
|===
| Format | Description | Examples | Results

| `+${name}+` |
  Variable `name` from hashtable _extra_vars_. |
  `+${name}+` |
  `+value+`

| `+${eval:xxx}+` +
  _(WeeChat ≥ 1.3)_ |
  String to evaluate. |
  `+${eval:${date:${weechat.look.buffer_time_format}}}+` |
  `+19:02:45+` (with colors if there are color codes in the option
  weechat.look.buffer_time_format)

| `+${esc:xxx}+` +
  `+${\xxx}+` +
  _(WeeChat ≥ 1.0)_ |
  String with escaped chars. |
  `+${esc:prefix\tmessage}+` +
  `+${\ua9}+` |
  `+prefix<TAB>message+` +
  `+©+`

| `+${hide:x,string}+` +
  _(WeeChat ≥ 1.1)_ |
  String with hidden chars (all chars in `string` replaced by `x`). |
  `+${hide:*,password}+` |
  `+********+`

| `+${cut:max,suffix,string}+` +
  `+${cut:+max,suffix,string}+` +
  _(WeeChat ≥ 1.8)_ |
  String with `max` chars, and optional `suffix` if string is cut. +
  With the format `+max`, the suffix is counted in max length. |
  `+${cut:4,…,this is a test}+` +
  `+${cut:+4,…,this is a test}+` +
  `+${cut:2,>>,こんにちは世界}+` |
  `+this…+` +
  `+t…+` +
  `+こん>>+`

| `+${cutscr:max,suffix,string}+` +
  `+${cutscr:+max,suffix,string}+` +
  _(WeeChat ≥ 1.8)_ |
  String with `max` chars displayed on screen, and optional `suffix` if string is cut. +
  With the format `+max`, the suffix is counted in max length. |
  `+${cutscr:4,…,this is a test}+` +
  `+${cutscr:+4,…,this is a test}+` +
  `+${cutscr:2,>>,こんにちは世界}+` |
  `+this…+` +
  `+thi…+` +
  `+こ>>+`

| `+${rev:xxx}+` +
  _(WeeChat ≥ 2.2)_ |
  Reversed string (color codes are reversed, so the string should not contain
  color codes). |
  `+${rev:Hello, world!}+` +
  `+${rev:Hello, ${color:red}world!}+` |
  `+!dlrow ,olleH+` +
  `+!dlrow30F ,olleH+` (no color, the color code is reversed)

| `+${revscr:xxx}+` +
  _(WeeChat ≥ 2.7)_ |
  Reversed string for screen, color codes are not reversed. |
  `+${revscr:Hello, world!}+` +
  `+${revscr:Hello, ${color:red}world!}+` |
  `+!dlrow ,olleH+` +
  `+!dlrow ,olleH+` (`pass:[ ,olleH]` in red)

| `+${repeat:count,string}+` +
  _(WeeChat ≥ 2.3)_ |
  Repeated string. |
  `+${repeat:5,-}+` |
  `+-----+`

| `+${length:xxx}+` +
  _(WeeChat ≥ 2.7)_ |
  Length of string (number of UTF-8 chars), color codes are ignored. |
  `+${length:test}+` +
  `+${length:こんにちは世界}+` |
  `+4+` +
  `+7+`

| `+${lengthscr:xxx}+` +
  _(WeeChat ≥ 2.7)_ |
  Length of string displayed on screen, color codes are ignored. |
  `+${lengthscr:test}+` +
  `+${lengthscr:こんにちは世界}+` |
  `+4+` +
  `+14+`

| `+${re:N}+` +
  _(WeeChat ≥ 1.1)_ |
  Regex captured group: `0` = whole string matching, `1` to `99` = group
  captured, `+++` = last group captured,
  `#` = index of last group captured _(WeeChat ≥ 1.8)_. |
  `+${re:0}+` +
  `+${re:1}+` +
  `+${re:2}+` +
  `+${re:+}+` +
  `+${re:#}+` |
  `+test1 test2+` +
  `+test1+` +
  `+test2+` +
  `+test2+` +
  `+2+`

| `+${color:name}+` +
  _(WeeChat ≥ 0.4.2)_ |
  WeeChat color code (the name of color has optional attributes),
  see function <<_color,color>> for supported formats. |
  `+${color:red}red text+` +
  `+${color:*214}bold orange text+` |
  `+red text+` (in red) +
  `+bold orange text+` (in bold orange)

| `+${modifier:name,data,string}+` +
  _(WeeChat ≥ 2.7)_ |
  Result of a modifier, see function
  <<_hook_modifier_exec,hook_modifier_exec>>. |
  `+${modifier:eval_path_home,,~}+` +
  `+${modifier:eval_path_home,,%h/python}+` |
  `+/home/xxx+` +
  `+/home/xxx/.weechat/python+`

| `+${info:name}+` +
  `+${info:name,arguments}+` +
  _(WeeChat ≥ 0.4.3)_ |
  Info from WeeChat or a plugin, see function
  <<_info_get,info_get>>. |
  `+${info:version}+` +
  `+${info:nick_color_name,foo}+` |
  `+1.0+` +
  `+lightblue+`

| `+${date}+` +
  `+${date:xxx}+` +
  _(WeeChat ≥ 1.3)_ |
  Current date/time, with custom format (see `man strftime`),
  default format is `%F %T`. |
  `+${date}+` +
  `+${date:%H:%M:%S}+` |
  `+2015-06-30 19:02:45+` +
  `+19:02:45+`

| `+${env:NAME}+` +
  _(WeeChat ≥ 1.2)_ |
  Value of the environment variable `NAME`. |
  `+${env:HOME}+` |
  `+/home/user+`

| `+${if:condition}+` +
  `+${if:condition?true}+`
  `+${if:condition?true:false}+`
  _(WeeChat ≥ 1.8)_ |
  Ternary operator with a condition, a value if the condition is true (optional)
  and another value if the condition is false (optional). If values are not
  given, "1" or "0" are returned, according to the result of the condition. |
  `+${if:${info:term_width}>80?big:small}+` |
  `+big+`

| `+${calc:xxx}+` +
  _(WeeChat ≥ 2.7)_ |
  Result of expression, where parentheses and the following operators are
  supported: +
  `+++`: addition +
  `+-+`: subtraction +
  `+*+`: multiplication +
  `+/+`: division +
  `+//+`: result of division without fractional part +
  `+%+`: remainder of division +
  `+**+`: power. |
  `+${calc:5+2*3}+` +
  `+${calc:(5+2)*3}+` +
  `+${calc:10/4}+` +
  `+${calc:10//4}+` +
  `+${calc:9.2%3}+` +
  `+${calc:2**16}+` |
  `+11+` +
  `+21+` +
  `+2.5+` +
  `+2+` +
  `+0.2+` +
  `+65536+`

| `+${sec.data.name}+` |
  Value of the secured data `name`. |
  `+${sec.data.freenode_pass}+` |
  `+my_password+`

| `+${file.section.option}+` |
  Value of the option. |
  `+${weechat.look.buffer_time_format}+` |
  `+%H:%M:%S+`

| `+${name}+` |
  Value of local variable `name` in buffer. |
  `+${nick}+` |
  `+FlashCode+`

| `+${hdata.var1.var2...}+` +
  `+${hdata[list].var1.var2...}+` |
  Hdata value (pointers `window` and `buffer` are set by default with current
  window/buffer). |
  `+${buffer[gui_buffers].full_name}+` +
  `+${window.buffer.number}+` |
  `+core.weechat+` +
  `+1+`
|===

==== string_dyn_alloc

_WeeChat ≥ 1.8._

Allocate a dynamic string, with a variable length. +
Internally, a structure is allocated with the string pointer, the allocated size
and current length of string.

Only the pointer to string pointer (_**string_) is used in all the
_pass:[string_dyn_*]_ functions.

Prototype:

[source,C]
----
char **weechat_string_dyn_alloc (int size_alloc);
----

Arguments:

* _size_alloc_: the initial allocated size (must be greater than zero)

Return value:

* pointer to the dynamic string

C example:

[source,C]
----
char **string = weechat_string_dyn_alloc (256);
----

[NOTE]
This function is not available in scripting API.

==== string_dyn_copy

_WeeChat ≥ 1.8._

Copy a string in a dynamic string.

The pointer _*string_ can change if the string is reallocated (if there is
not enough space to copy the string).

Prototype:

[source,C]
----
int weechat_string_dyn_copy (char **string, const char *new_string);
----

Arguments:

* _string_: pointer to dynamic string
* _new_string_: the string to copy

Return value:

* 1 if OK, 0 if error

C example:

[source,C]
----
char **string = weechat_string_dyn_alloc (256);
if (weechat_string_dyn_copy (string, "test"))
{
    /* OK */
}
else
{
    /* error */
}
----

[NOTE]
This function is not available in scripting API.

==== string_dyn_concat

_WeeChat ≥ 1.8._

Concatenate a string to a dynamic string.

The pointer _*string_ can change if the string is reallocated (if there is
not enough space to concatenate the string).

Prototype:

[source,C]
----
int weechat_string_dyn_concat (char **string, const char *add);
----

Arguments:

* _string_: pointer to dynamic string
* _add_: the string to add

Return value:

* 1 if OK, 0 if error

C example:

[source,C]
----
char **string = weechat_string_dyn_alloc (256);
if (weechat_string_dyn_copy (string, "test"))
{
    if (weechat_string_dyn_concat (string, "abc"))
    {
        /* ... */
    }
}
----

[NOTE]
This function is not available in scripting API.

==== string_dyn_free

_WeeChat ≥ 1.8._

Free a dynamic string.

Prototype:

[source,C]
----
char *weechat_string_dyn_free (char **string, int free_string);
----

Arguments:

* _string_: pointer to dynamic string
* _free_string_: free the string itself; if 0, the content of _*string_ remains
  valid after the call to this function

Return value:

* string pointer if _free_string_ is 0, otherwise NULL

C example:

[source,C]
----
char **string = weechat_string_dyn_alloc (256);
if (weechat_string_dyn_concat (string, "test"))
{
    /* OK */
}
else
{
    /* error */
}
/* ... */
weechat_string_dyn_free (string, 1);
----

[NOTE]
This function is not available in scripting API.

[[utf-8]]
=== UTF-8

Some UTF-8 string functions.

==== utf8_has_8bits

Check if a string has 8-bits chars.

Prototype:

[source,C]
----
int weechat_utf8_has_8bits (const char *string);
----

Arguments:

* _string_: string

Return value:

* 1 if string has 8-bits chars, 0 if only 7-bits chars

C example:

[source,C]
----
if (weechat_utf8_has_8bits (string))
{
    /* ... */
}
----

[NOTE]
This function is not available in scripting API.

==== utf8_is_valid

_Updated in 1.4._

Check if a string is UTF-8 valid.

Prototype:

[source,C]
----
int weechat_utf8_is_valid (const char *string, int length, char **error);
----

Arguments:

* _string_: string
* _length_: max number of UTF-8 chars to check; if ≤ 0, the whole string is
  checked _(WeeChat ≥ 1.4)_
* _error_: if not NULL, _*error_ is set with pointer to first non valid UTF-8
  char in string, if any

Return value:

* 1 if UTF-8 string is valid, otherwise 0

C example:

[source,C]
----
char *error;
if (weechat_utf8_is_valid (string, -1, &error))
{
    /* ... */
}
else
{
    /* "error" points to first invalid char */
}
----

[NOTE]
This function is not available in scripting API.

==== utf8_normalize

Normalize UTF-8 string: remove non UTF-8 chars and replace them by a char.

Prototype:

[source,C]
----
void weechat_utf8_normalize (char *string, char replacement);
----

Arguments:

* _string_: string
* _replacement_: replacement char for invalid chars

C example:

[source,C]
----
weechat_utf8_normalize (string, '?');
----

[NOTE]
This function is not available in scripting API.

==== utf8_prev_char

_Updated in 1.3._

Return pointer to previous UTF-8 char in a string.

Prototype:

[source,C]
----
const char *weechat_utf8_prev_char (const char *string_start,
                                    const char *string);
----

Arguments:

* _string_start_: start of string (function will not return a char before this
  pointer)
* _string_: pointer to string (must be ≥ _string_start_)

Return value:

* pointer to previous UTF-8 char, NULL if not found (start of string reached)
  (_WeeChat ≥ 1.3_: pointer returned is a _const char *_ instead of _char *_)

C example:

[source,C]
----
const char *prev_char = weechat_utf8_prev_char (string, ptr_in_string);
----

[NOTE]
This function is not available in scripting API.

==== utf8_next_char

_Updated in 1.3._

Return pointer to next UTF-8 char in a string.

Prototype:

[source,C]
----
const char *weechat_utf8_next_char (const char *string);
----

Arguments:

* _string_: string

Return value:

* pointer to next UTF-8 char, NULL if not found (end of string reached)
  (_WeeChat ≥ 1.3_: pointer returned is a _const char *_ instead of _char *_)

C example:

[source,C]
----
const char *next_char = weechat_utf8_next_char (string);
----

[NOTE]
This function is not available in scripting API.

==== utf8_char_int

Return UTF-8 char as integer.

Prototype:

[source,C]
----
int weechat_utf8_char_int (const char *string);
----

Arguments:

* _string_: string

Return value:

* UTF-8 char as integer

C example:

[source,C]
----
int char_int = weechat_utf8_char_int ("être");  /* "ê" as integer */
----

[NOTE]
This function is not available in scripting API.

==== utf8_char_size

Return UTF-8 char size (in bytes).

Prototype:

[source,C]
----
int weechat_utf8_char_size (const char *string);
----

Arguments:

* _string_: string

Return value:

* UTF-8 char size (in bytes)

C example:

[source,C]
----
int char_size = weechat_utf8_char_size ("être");  /* == 2 */
----

[NOTE]
This function is not available in scripting API.

==== utf8_strlen

Return UTF-8 string length (in UTF-8 chars).

Prototype:

[source,C]
----
int weechat_utf8_strlen (const char *string);
----

Arguments:

* _string_: string

Return value:

* UTF-8 string length (number of UTF-8 chars)

C example:

[source,C]
----
int length = weechat_utf8_strlen ("chêne");  /* == 5 */
----

[NOTE]
This function is not available in scripting API.

==== utf8_strnlen

Return UTF-8 string length (in UTF-8 chars), for max _bytes_ in string.

Prototype:

[source,C]
----
int weechat_utf8_strnlen (const char *string, int bytes);
----

Arguments:

* _string_: string
* _bytes_: max bytes

Return value:

* UTF-8 string length (number of UTF-8 chars)

C example:

[source,C]
----
int length = weechat_utf8_strnlen ("chêne", 4);  /* == 3 */
----

[NOTE]
This function is not available in scripting API.

==== utf8_strlen_screen

Return number of chars needed on screen to display UTF-8 string.

Prototype:

[source,C]
----
int weechat_utf8_strlen_screen (const char *string);
----

Arguments:

* _string_: string

Return value:

* number of chars needed on screen to display UTF-8 string

C example:

[source,C]
----
int length_on_screen = weechat_utf8_strlen_screen ("é");  /* == 1 */
----

[NOTE]
This function is not available in scripting API.

==== utf8_charcmp

_Updated in 1.0._

Compare two UTF-8 chars.

Prototype:

[source,C]
----
int weechat_utf8_charcmp (const char *string1, const char *string2);
----

Arguments:

* _string1_: first string for comparison
* _string2_: second string for comparison

Return value:

* -1 if string1 < string2
* 0 if string1 == string2
* 1 if string1 > string2

C example:

[source,C]
----
int diff = weechat_utf8_charcmp ("aaa", "ccc");  /* == -2 */
----

[NOTE]
This function is not available in scripting API.

==== utf8_charcasecmp

_Updated in 1.0._

Compare two UTF-8 chars, ignoring case.

Prototype:

[source,C]
----
int weechat_utf8_charcasecmp (const char *string1, const char *string2);
----

Arguments:

* _string1_: first string for comparison
* _string2_: second string for comparison

Return value:

* -1 if string1 < string2
* 0 if string1 == string2
* 1 if string1 > string2

C example:

[source,C]
----
int diff = weechat_utf8_charcasecmp ("aaa", "CCC");  /* == -2 */
----

[NOTE]
This function is not available in scripting API.

==== utf8_char_size_screen

Return number of chars needed on screen to display UTF-8 char.

Prototype:

[source,C]
----
int weechat_utf8_char_size_screen (const char *string);
----

Arguments:

* _string_: string

Return value:

* number of chars needed on screen to display UTF-8 char

C example:

[source,C]
----
int length_on_screen = weechat_utf8_char_size_screen ("é");  /* == 1 */
----

[NOTE]
This function is not available in scripting API.

==== utf8_add_offset

_Updated in 1.3._

Move forward N chars in an UTF-8 string.

Prototype:

[source,C]
----
const char *weechat_utf8_add_offset (const char *string, int offset);
----

Arguments:

* _string_: string
* _offset_: number of chars

Return value:

* pointer to string, N chars after (NULL if it's not reachable)
  (_WeeChat ≥ 1.3_: pointer returned is a _const char *_ instead of _char *_)

C example:

[source,C]
----
const char *str = "chêne";
const char *str2 = weechat_utf8_add_offset (str, 3);  /* points to "ne" */
----

[NOTE]
This function is not available in scripting API.

==== utf8_real_pos

Return real position in UTF-8 string.

Prototype:

[source,C]
----
int weechat_utf8_real_pos (const char *string, int pos);
----

Arguments:

* _string_: string
* _pos_: position (number of chars)

Return value:

* real potision (in bytes)

C example:

[source,C]
----
int pos = weechat_utf8_real_pos ("chêne", 3);  /* == 4 */
----

[NOTE]
This function is not available in scripting API.

==== utf8_pos

Return position in UTF-8 string.

Prototype:

[source,C]
----
int weechat_utf8_pos (const char *string, int real_pos);
----

Arguments:

* _string_: string
* _real_pos_: position (bytes)

Return value:

* position (number of chars)

C example:

[source,C]
----
int pos = weechat_utf8_pos ("chêne", 4);  /* == 3 */
----

[NOTE]
This function is not available in scripting API.

==== utf8_strndup

Return duplicate string, with _length_ chars max.

Prototype:

[source,C]
----
char *weechat_utf8_strndup (const char *string, int length);
----

Arguments:

* _string_: string
* _length_: max chars to duplicate

Return value:

* duplicated string (must be freed by calling "free" after use)

C example:

[source,C]
----
char *string = weechat_utf8_strndup ("chêne", 3);  /* returns "chê" */
/* ... */
free (string);
----

[NOTE]
This function is not available in scripting API.

[[crypto]]
=== Cryptography

Some cryptographic functions.

==== crypto_hash

_WeeChat ≥ 2.8._

Compute hash of data.

Prototype:

[source,C]
----
int weechat_crypto_hash (const void *data, int data_size, const char *hash_algo,
                         void *hash, int *hash_size);
----

Arguments:

* _data_: the data to hash
* _data_size_: number of bytes to hash in _data_
* _hash_algo_: the hash algorithm, see table below
* _hash_: pointer to the hash variable, which is used to store the resulting hash
  (the buffer must be large enough, according to the algorithm, see table below)
* _hash_size_: pointer to a variable used to store the size of the hash computed
  (in bytes) (can be NULL)

[[crypto_hash_algorithms]]
Supported hash algorithms:

[width="100%",cols="2,2,3,6",options="header"]
|===
| Value        | Algorithm | Hash size           | Notes
| `+crc32+`    | CRC32     | 4 bytes (32 bits)   | Not a hash algorithm in the cryptographic sense.
| `+md5+`      | MD5       | 16 bytes (128 bits) | *Weak*, not recommended for cryptography usage.
| `+sha1+`     | SHA-1     | 20 bytes (160 bits) | *Weak*, not recommended for cryptography usage.
| `+sha224+`   | SHA-224   | 28 bytes (224 bits) |
| `+sha256+`   | SHA-256   | 32 bytes (256 bits) |
| `+sha384+`   | SHA-384   | 48 bytes (384 bits) |
| `+sha512+`   | SHA-512   | 64 bytes (512 bits) |
| `+sha3-224+` | SHA3-224  | 28 bytes (224 bits) | Algorithm available with libgcrypt ≥ 1.7.0.
| `+sha3-256+` | SHA3-256  | 32 bytes (256 bits) | Algorithm available with libgcrypt ≥ 1.7.0.
| `+sha3-384+` | SHA3-384  | 48 bytes (384 bits) | Algorithm available with libgcrypt ≥ 1.7.0.
| `+sha3-512+` | SHA3-512  | 64 bytes (512 bits) | Algorithm available with libgcrypt ≥ 1.7.0.
|===

Return value:

* 1 if OK, 0 if error

C example:

[source,C]
----
const char *data = "abcdefghijklmnopqrstuvwxyz";
char hash[256 / 8];
int rc, hash_size;
rc = weechat_crypto_hash (data, strlen (data), "sha256", hash, &hash_size);
/* rc == 1, hash_size == 32 and hash is a buffer with:
   71 c4 80 df 93 d6 ae 2f 1e fa d1 44 7c 66 c9 52 5e 31 62 18 cf 51 fc 8d 9e d8 32 f2 da f1 8b 73 */
----

[NOTE]
This function is not available in scripting API.

==== crypto_hash_pbkdf2

_WeeChat ≥ 2.8._

Compute PKCS#5 Passphrase Based Key Derivation Function number 2 (PBKDF2) hash
of data.

Prototype:

[source,C]
----
int weechat_crypto_hash_pbkdf2 (const void *data, int data_size,
                                const char *hash_algo,
                                const void *salt, int salt_size,
                                int iterations,
                                void *hash, int *hash_size);
----

Arguments:

* _data_: the data to hash
* _data_size_: number of bytes to hash in _data_
* _hash_algo_: hash algorithm used by the key derivation function, see table
  in function <<crypto_hash_algorithms,crypto_hash>>
* _salt_: the salt
* _salt_size_: number of bytes in _salt_
* _iterations_: number of iterations
* _hash_: pointer to the hash variable, which is used to store the resulting hash
  (the buffer must be large enough, according to the algorithm, see table in
  function <<crypto_hash_algorithms,crypto_hash>>)
* _hash_size_: pointer to a variable used to store the size of the hash computed
  (in bytes) (can be NULL)

Return value:

* 1 if OK, 0 if error

C example:

[source,C]
----
const char *data = "abcdefghijklmnopqrstuvwxyz";
const char *salt = "12345678901234567890123456789012";  /* 32 bytes */
char hash[256 / 8];
int rc, hash_size;
rc = weechat_crypto_hash_pbkdf2 (data, strlen (data), "sha256", salt, strlen (salt), 100000,
                                 hash, &hash_size);
/* rc == 1, hash_size == 32 and hash is a buffer with:
   99 b3 5e 42 53 d1 a7 a8 49 c1 dc 2c e2 53 c2 b6 6d a1 8b dc 6e 78 a7 06 e0 ef 34 db 0a 7a a2 bb */
----

[NOTE]
This function is not available in scripting API.

[[directories]]
=== Directories

Some functions related to directories.

==== mkdir_home

Create a directory in WeeChat home.

Prototype:

[source,C]
----
int weechat_mkdir_home (char *directory, int mode);
----

Arguments:

* _directory_: name of directory to create
* _mode_: mode for directory

Return value:

* 1 if directory was successfully created, 0 if an error occurred

C example:

[source,C]
----
if (!weechat_mkdir_home ("temp", 0755))
{
    /* error */
}
----

Script (Python):

[source,python]
----
# prototype
weechat.mkdir_home(directory, mode)

# example
weechat.mkdir_home("temp", 0755)
----

==== mkdir

Create a directory.

Prototype:

[source,C]
----
int weechat_mkdir (char *directory, int mode);
----

Arguments:

* _directory_: name of directory to create
* _mode_: mode for directory

Return value:

* 1 if directory was successfully created, 0 if an error occurred

C example:

[source,C]
----
if (!weechat_mkdir ("/tmp/mydir", 0755))
{
    /* error */
}
----

Script (Python):

[source,python]
----
# prototype
weechat.mkdir(directory, mode)

# example
weechat.mkdir("/tmp/mydir", 0755)
----

==== mkdir_parents

Create a directory and make parent directories as needed.

Prototype:

[source,C]
----
int weechat_mkdir_parents (char *directory, int mode);
----

Arguments:

* _directory_: name of directory to create
* _mode_: mode for directory

Return value:

* 1 if directory was successfully created, 0 if an error occurred

C example:

[source,C]
----
if (!weechat_mkdir_parents ("/tmp/my/dir", 0755))
{
    /* error */
}
----

Script (Python):

[source,python]
----
# prototype
weechat.mkdir_parents(directory, mode)

# example
weechat.mkdir_parents("/tmp/my/dir", 0755)
----

==== exec_on_files

_Updated in 1.5, 2.0._

Find files in a directory and execute a callback on each file.

Prototype:

[source,C]
----
void weechat_exec_on_files (const char *directory,
                            int recurse_subdirs,
                            int hidden_files,
                            void (*callback)(void *data,
                                             const char *filename),
                            void *callback_data);
----

Arguments:

* _directory_: directory for searching files
* _recurse_subdirs_: 1 to recurse into sub-directories _(WeeChat ≥ 2.0)_
* _hidden_files_: 1 to include hidden files, otherwise 0
* _callback_: function called for each file found, arguments:
** _void *data_: pointer
** _const char *filename_: filename found
* _callback_data_: pointer given to callback when it is called by WeeChat

C example:

[source,C]
----
void callback (void *data, const char *filename)
{
    /* ... */
}
...
weechat_exec_on_files ("/tmp", 0, 0, &callback, NULL);
----

[NOTE]
This function is not available in scripting API.

==== file_get_content

_WeeChat ≥ 0.3.1._

Get content of text file in a string.

Prototype:

[source,C]
----
char *weechat_file_get_content (const char *filename);
----

Arguments:

* _filename_: path and file name

Return value:

* content of file as string (must be freed by calling "free" after use)

C example:

[source,C]
----
char *content;

content = weechat_file_get_content ("/tmp/test.txt");
/* ... */
free (content);
----

[NOTE]
This function is not available in scripting API.

[[util]]
=== Util

Some useful functions.

==== util_timeval_cmp

Compare two "timeval" structures.

Prototype:

[source,C]
----
int weechat_util_timeval_cmp (struct timeval *tv1, struct timeval *tv2);
----

Arguments:

* _tv1_: first "timeval" structure
* _tv2_: second "timeval" structure

Return value:

* -1 if tv1 < tv2
* zero if tv1 == tv2
* +1 if tv1 > tv2

C example:

[source,C]
----
if (weechat_util_timeval_cmp (&tv1, &tv2) > 0)
{
    /* tv1 > tv2 */
}
----

[NOTE]
This function is not available in scripting API.

==== util_timeval_diff

_Updated in 1.1._

Return difference (in microseconds) between two "timeval" structures.

Prototype:

[source,C]
----
long long weechat_util_timeval_diff (struct timeval *tv1, struct timeval *tv2);
----

Arguments:

* _tv1_: first "timeval" structure
* _tv2_: second "timeval" structure

Return value:

* difference in microseconds

[NOTE]
With WeeChat ≤ 1.0, the returned value was in milliseconds.

C example:

[source,C]
----
long long diff = weechat_util_timeval_diff (&tv1, &tv2);
----

[NOTE]
This function is not available in scripting API.

==== util_timeval_add

_Updated in 1.1._

Add interval (in microseconds) to a timeval structure.

Prototype:

[source,C]
----
void weechat_util_timeval_add (struct timeval *tv, long long interval);
----

Arguments:

* _tv_: timeval structure
* _interval_: interval (in microseconds)

[NOTE]
With WeeChat ≤ 1.0, the interval was expressed in milliseconds.

C example:

[source,C]
----
weechat_util_timeval_add (&tv, 2000000);  /* add 2 seconds */
----

[NOTE]
This function is not available in scripting API.

==== util_get_time_string

_WeeChat ≥ 0.3.2, updated in 1.3._

Get date/time as a string built with "strftime" and the format defined in
option _weechat.look.time_format_.

Prototype:

[source,C]
----
const char *weechat_util_get_time_string (const time_t *date);
----

Arguments:

* _date_: pointer to date

Return value:

* pointer to a string with date/time

C example:

[source,C]
----
time_t date = time (NULL);
weechat_printf (NULL, "date: %s",
                weechat_util_get_time_string (&date));
----

[NOTE]
This function is not available in scripting API.

==== util_version_number

_WeeChat ≥ 0.3.9._

Convert a string with WeeChat version to a number.

Prototype:

[source,C]
----
int weechat_util_version_number (const char *version);
----

Arguments:

* _version_: WeeChat version as string (example: "0.3.9" or "0.3.9-dev")

C example:

[source,C]
----
version_number = weechat_util_version_number ("0.3.8");      /* == 0x00030800 */
version_number = weechat_util_version_number ("0.3.9-dev");  /* == 0x00030900 */
version_number = weechat_util_version_number ("0.3.9-rc1");  /* == 0x00030900 */
version_number = weechat_util_version_number ("0.3.9");      /* == 0x00030900 */
----

[NOTE]
This function is not available in scripting API.

[[sorted_lists]]
=== Sorted lists

Sorted list functions.

==== list_new

Create a new list.

Prototype:

[source,C]
----
struct t_weelist *weechat_list_new ();
----

Return value:

* pointer to new list

C example:

[source,C]
----
struct t_weelist *list = weechat_list_new ();
----

Script (Python):

[source,python]
----
# prototype
list = weechat.list_new()

# example
list = weechat.list_new()
----

==== list_add

Add an item in a list.

Prototype:

[source,C]
----
struct t_weelist_item *weechat_list_add (struct t_weelist *weelist,
                                         const char *data,
                                         const char *where,
                                         void *user_data);
----

Arguments:

* _weelist_: list pointer
* _data_: data to insert in list
* _where_: position in list:
** _WEECHAT_LIST_POS_SORT_: add in list, keeping list sorted
** _WEECHAT_LIST_POS_BEGINNING_: add to beginning of list
** _WEECHAT_LIST_POS_END_: add to end of list
* _user_data_: any pointer

Return value:

* pointer to new item

C example:

[source,C]
----
struct t_weelist_item *my_item =
    weechat_list_add (list, "my data", WEECHAT_LIST_POS_SORT, NULL);
----

Script (Python):

[source,python]
----
# prototype
item = weechat.list_add(list, data, where, user_data)

# example
item = weechat.list_add(list, "my data", weechat.WEECHAT_LIST_POS_SORT, "")
----

==== list_search

Search an item in a list.

Prototype:

[source,C]
----
struct t_weelist_item *weechat_list_search (struct t_weelist *weelist,
                                            const char *data);
----

Arguments:

* _weelist_: list pointer
* _data_: data to search in list

Return value:

* pointer to item found, NULL if item was not found

C example:

[source,C]
----
struct t_weelist_item *item = weechat_list_search (list, "my data");
----

Script (Python):

[source,python]
----
# prototype
item = weechat.list_search(list, data)

# example
item = weechat.list_search(list, "my data")
----

==== list_search_pos

_WeeChat ≥ 0.3.4._

Search an item position in a list.

Prototype:

[source,C]
----
int weechat_list_search_pos (struct t_weelist *weelist,
                             const char *data);
----

Arguments:

* _weelist_: list pointer
* _data_: data to search in list

Return value:

* position of item found, -1 if item was not found

C example:

[source,C]
----
int pos_item = weechat_list_search_pos (list, "my data");
----

Script (Python):

[source,python]
----
# prototype
pos_item = weechat.list_search_pos(list, data)

# example
pos_item = weechat.list_search_pos(list, "my data")
----

==== list_casesearch

Search an item in a list, ignoring case.

Prototype:

[source,C]
----
struct t_weelist_item *weechat_list_casesearch (struct t_weelist *weelist,
                                                const char *data);
----

Arguments:

* _weelist_: list pointer
* _data_: data to search in list

Return value:

* pointer to item found, NULL if item was not found

C example:

[source,C]
----
struct t_weelist_item *item = weechat_list_casesearch (list, "my data");
----

Script (Python):

[source,python]
----
# prototype
item = weechat.list_casesearch(list, data)

# example
item = weechat.list_casesearch(list, "my data")
----

==== list_casesearch_pos

_WeeChat ≥ 0.3.4._

Search an item position in a list, ignoring case.

Prototype:

[source,C]
----
int weechat_list_casesearch_pos (struct t_weelist *weelist,
                                 const char *data);
----

Arguments:

* _weelist_: list pointer
* _data_: data to search in list

Return value:

* position of item found, -1 if item was not found

C example:

[source,C]
----
int pos_item = weechat_list_casesearch_pos (list, "my data");
----

Script (Python):

[source,python]
----
# prototype
pos_item = weechat.list_casesearch_pos(list, data)

# example
pos_item = weechat.list_casesearch_pos(list, "my data")
----

==== list_get

Return an item in a list by position.

Prototype:

[source,C]
----
struct t_weelist_item *weechat_list_get (struct t_weelist *weelist,
                                         int position);
----

Arguments:

* _weelist_: list pointer
* _position_: position in list (first item is 0)

Return value:

* pointer to item found, NULL if item was not found

C example:

[source,C]
----
struct t_weelist_item *item = weechat_list_get (list, 0);  /* first item */
----

Script (Python):

[source,python]
----
# prototype
item = weechat.list_get(list, position)

# example
item = weechat.list_get(list, 0)
----

==== list_set

Set new value for an item.

Prototype:

[source,C]
----
void weechat_list_set (struct t_weelist_item *item, const char *value);
----

Arguments:

* _item_: item pointer
* _value_: new value for item

C example:

[source,C]
----
weechat_list_set (item, "new data");
----

Script (Python):

[source,python]
----
# prototype
weechat.list_set(item, value)

# example
weechat.list_set(item, "new data")
----

==== list_next

Return next item in list.

Prototype:

[source,C]
----
struct t_weelist_item *weechat_list_next (struct t_weelist_item *item);
----

Arguments:

* _item_: item pointer

Return value:

* pointer to next item, NULL if pointer was last item in list

C example:

[source,C]
----
struct t_weelist_item *next_item = weechat_list_next (item);
----

Script (Python):

[source,python]
----
# prototype
item = weechat.list_next(item)

# example
item = weechat.list_next(item)
----

==== list_prev

Return previous item in list.

Prototype:

[source,C]
----
struct t_weelist_item *weechat_list_prev (struct t_weelist_item *item);
----

Arguments:

* _item_: item pointer

Return value:

* pointer to previous item, NULL if pointer was first item in list

C example:

[source,C]
----
struct t_weelist_item *prev_item = weechat_list_prev (item);
----

Script (Python):

[source,python]
----
# prototype
item = weechat.list_prev(item)

# example
item = weechat.list_prev(item)
----

==== list_string

Return string value of an item.

Prototype:

[source,C]
----
const char *weechat_list_string (struct t_weelist_item *item);
----

Arguments:

* _item_: item pointer

Return value:

* string value of item

C example:

[source,C]
----
weechat_printf (NULL, "value of item: %s", weechat_list_string (item));
----

Script (Python):

[source,python]
----
# prototype
value = weechat.list_string(item)

# example
weechat.prnt("", "value of item: %s" % weechat.list_string(item))
----

==== list_user_data

_WeeChat ≥ 2.6._

Return pointer to the user data of an item.

Prototype:

[source,C]
----
void *weechat_list_user_data (struct t_weelist_item *item);
----

Arguments:

* _item_: item pointer

Return value:

* pointer to the user data of item

C example:

[source,C]
----
weechat_printf (NULL, "user data of item: 0x%lx", weechat_list_user_data (item));
----

[NOTE]
This function is not available in scripting API.

==== list_size

Return size of list (number of items).

Prototype:

[source,C]
----
char *weechat_list_size (struct t_weelist *weelist);
----

Arguments:

* _weelist_: list pointer

Return value:

* size of list (number of items), 0 if list is empty

C example:

[source,C]
----
weechat_printf (NULL, "size of list: %d", weechat_list_size (list));
----

Script (Python):

[source,python]
----
# prototype
size = weechat.list_size(list)

# example
weechat.prnt("", "size of list: %d" % weechat.list_size(list))
----

==== list_remove

Remove an item in a list.

Prototype:

[source,C]
----
void weechat_list_remove (struct t_weelist *weelist,
                          struct t_weelist_item *item);
----

Arguments:

* _weelist_: list pointer
* _item_: item pointer

C example:

[source,C]
----
weechat_list_remove (list, item);
----

Script (Python):

[source,python]
----
# prototype
weechat.list_remove(list, item)

# example
weechat.list_remove(list, item)
----

==== list_remove_all

Remove all items from a list.

Prototype:

[source,C]
----
void weechat_list_remove_all (struct t_weelist *weelist);
----

Arguments:

* _weelist_: list pointer

C example:

[source,C]
----
weechat_list_remove_all (list);
----

Script (Python):

[source,python]
----
# prototype
weechat.list_remove_all(list)

# example
weechat.list_remove_all(list)
----

==== list_free

Free a list.

Prototype:

[source,C]
----
void weechat_list_free (struct t_weelist *weelist);
----

Arguments:

* _weelist_: list pointer

C example:

[source,C]
----
weechat_list_free (list);
----

Script (Python):

[source,python]
----
# prototype
weechat.list_free(list)

# example
weechat.list_free(list)
----

[[array_lists]]
=== Array lists

Array list functions.

An array list is a list of pointers with a dynamic size and optional sort.

==== arraylist_new

_WeeChat ≥ 1.8._

Create a new array list.

Prototype:

[source,C]
----
struct t_arraylist *weechat_arraylist_new (int initial_size,
                                           int sorted,
                                           int allow_duplicates,
                                           int (*callback_cmp)(void *data,
                                                               struct t_arraylist *arraylist,
                                                               void *pointer1,
                                                               void *pointer2),
                                           void *callback_cmp_data,
                                           void (*callback_free)(void *data,
                                                                 struct t_arraylist *arraylist,
                                                                 void *pointer),
                                           void *callback_free_data);
----

Arguments:

* _initial_size_: initial size of the array list (not the number of items)
* _sorted_: 1 to sort the array list, 0 for no sort
* _allow_duplicates_: 1 to allow duplicate entries, 0 to prevent a same entry
  to be added again
* _callback_cmp_: callback used to compare two items (optional), arguments and
  return value:
** _void *data_: pointer
** _struct t_arraylist *arraylist_: array list pointer
** _void *pointer1_: pointer to first item
** _void *pointer2_: pointer to second item
** return value:
*** negative number if first item is less than second item
*** 0 if first item equals second item
*** positive number if first item is greater than second item
* _callback_cmp_data_: pointer given to callback when it is called by WeeChat
* _callback_free_: callback used to free an item (optional), arguments:
** _void *data_: pointer
** _struct t_arraylist *arraylist_: array list pointer
** _void *pointer_: pointer to item
* _callback_free_data_: pointer given to callback when it is called by WeeChat

Return value:

* pointer to new array list

C example:

[source,C]
----
int
cmp_cb (void *data, struct t_arraylist *arraylist,
        void *pointer1, void *pointer2)
{
    if (...)
        return -1;
    else if (...)
        return 1;
    else
        return 0;
}

struct t_arraylist *list = weechat_arraylist_new (32, 1, 1,
                                                  &cmp_cb, NULL, NULL, NULL);
----

[NOTE]
This function is not available in scripting API.

==== arraylist_size

_WeeChat ≥ 1.8._

Return size of array list (number of item pointers).

Prototype:

[source,C]
----
int weechat_list_size (struct t_arraylist *arraylist);
----

Arguments:

* _arraylist_: array list pointer

Return value:

* size of array list (number of items), 0 if array list is empty

C example:

[source,C]
----
weechat_printf (NULL, "size of array list: %d", weechat_arraylist_size (arraylist));
----

[NOTE]
This function is not available in scripting API.

==== arraylist_get

_WeeChat ≥ 1.8._

Return an item pointer by position.

Prototype:

[source,C]
----
void *weechat_arraylist_get (struct t_arraylist *arraylist, int index);
----

Arguments:

* _arraylist_: array list pointer
* _index_: index in list (first pointer is 0)

Return value:

* pointer found, NULL if pointer was not found

C example:

[source,C]
----
void *pointer = weechat_arraylist_get (arraylist, 0);  /* first item */
----

[NOTE]
This function is not available in scripting API.

==== arraylist_search

_WeeChat ≥ 1.8._

Search an item in an array list.

Prototype:

[source,C]
----
void *weechat_arraylist_search (struct t_arraylist *arraylist, void *pointer,
                                int *index, int *index_insert);
----

Arguments:

* _arraylist_: array list pointer
* _pointer_: pointer to the item to search in array list
* _index_: pointer to integer that will be set to the index found, or -1 if not found
  (optional)
* _index_insert_: pointer to integer that will be set with the index that must be
  used to insert the element in the arraylist (to keep arraylist sorted) (optional)

Return value:

* pointer to item found, NULL if item was not found

C example:

[source,C]
----
int index, index_insert;
void *item = weechat_arraylist_search (arraylist, pointer, &index, &index_insert);
----

[NOTE]
This function is not available in scripting API.

==== arraylist_insert

_WeeChat ≥ 1.8._

Insert an item in an array list.

Prototype:

[source,C]
----
int weechat_arraylist_insert (struct t_arraylist *arraylist, int index, void *pointer);
----

Arguments:

* _arraylist_: array list pointer
* _index_: position of the item in array list or -1 to add at the end
  (this argument is used only if the array list is not sorted, it is ignored if
  the array list is sorted)
* _pointer_: pointer to the item to insert

Return value:

* index of new item (>= 0), -1 if error.

C example:

[source,C]
----
int index = weechat_arraylist_insert (arraylist, -1, pointer);  /* insert at the end if not sorted */
----

[NOTE]
This function is not available in scripting API.

==== arraylist_add

_WeeChat ≥ 1.8._

Add an item in an array list.

Prototype:

[source,C]
----
int weechat_arraylist_add (struct t_arraylist *arraylist, void *pointer);
----

Arguments:

* _arraylist_: array list pointer
* _pointer_: pointer to the item to add

Return value:

* index of new item (>= 0), -1 if error.

C example:

[source,C]
----
int index = weechat_arraylist_add (arraylist, pointer);
----

[NOTE]
This function is not available in scripting API.

==== arraylist_remove

_WeeChat ≥ 1.8._

Remove an item from an array list.

Prototype:

[source,C]
----
int weechat_arraylist_remove (struct t_arraylist *arraylist, int index);
----

Arguments:

* _arraylist_: array list pointer
* _index_: index of the item to remove

Return value:

* index of item removed, -1 if error.

C example:

[source,C]
----
int index_removed = weechat_arraylist_remove (arraylist, index);
----

[NOTE]
This function is not available in scripting API.

==== arraylist_clear

_WeeChat ≥ 1.8._

Remove all items from an array list.

Prototype:

[source,C]
----
int weechat_arraylist_clear (struct t_arraylist *arraylist);
----

Arguments:

* _arraylist_: array list pointer

Return value:

* 1 if OK, 0 if error

C example:

[source,C]
----
if (weechat_arraylist_clear (arraylist))
{
    /* OK */
}
----

[NOTE]
This function is not available in scripting API.

==== arraylist_free

_WeeChat ≥ 1.8._

Free an array list.

Prototype:

[source,C]
----
void weechat_arraylist_free (struct t_arraylist *arraylist);
----

Arguments:

* _arraylist_: array list pointer

C example:

[source,C]
----
weechat_arraylist_free (arraylist);
----

[NOTE]
This function is not available in scripting API.

[[hashtables]]
=== Hashtables

Hashtable functions.

==== hashtable_new

_WeeChat ≥ 0.3.3._

Create a new hashtable.

Prototype:

[source,C]
----
struct t_hashtable *weechat_hashtable_new (int size,
                                           const char *type_keys,
                                           const char *type_values,
                                           unsigned long long (*callback_hash_key)(struct t_hashtable *hashtable,
                                                                                   const void *key),
                                           int (*callback_keycmp)(struct t_hashtable *hashtable,
                                                                  const void *key1,
                                                                  const void *key2));
----

Arguments:

* _size_: size of internal array to store hashed keys, a high value uses more
  memory, but has better performance (this is *not* a limit for number of items
  in hashtable)
* _type_keys_: type for keys in hashtable:
** _WEECHAT_HASHTABLE_INTEGER_
** _WEECHAT_HASHTABLE_STRING_
** _WEECHAT_HASHTABLE_POINTER_
** _WEECHAT_HASHTABLE_BUFFER_
** _WEECHAT_HASHTABLE_TIME_
* _type_values_: type for values in hashtable:
** _WEECHAT_HASHTABLE_INTEGER_
** _WEECHAT_HASHTABLE_STRING_
** _WEECHAT_HASHTABLE_POINTER_
** _WEECHAT_HASHTABLE_BUFFER_
** _WEECHAT_HASHTABLE_TIME_
* _callback_hash_key_: callback used to "hash" a key (key as integer value), can
  be NULL if key type is not "buffer" (a default hash function is used),
  arguments and return value:
** _struct t_hashtable *hashtable_: hashtable pointer
** _const void *key_: key
** return value: hash of the key
* _callback_keycmp_: callback used to compare two keys, can be NULL if key type
  is not "buffer" (a default comparison function is used), arguments and return
  value:
** _struct t_hashtable *hashtable_: hashtable pointer
** _const void *key1_: first key
** _const void *key2_: second key
** return value:
*** negative number if _key1_ is less than _key2_
*** 0 if _key1_ equals _key2_
*** positive number if _key1_ is greater than _key2_

Return value:

* pointer to new hashtable, NULL if an error occurred

C example:

[source,C]
----
struct t_hashtable *hashtable = weechat_hashtable_new (8,
                                                       WEECHAT_HASHTABLE_STRING,
                                                       WEECHAT_HASHTABLE_STRING,
                                                       NULL,
                                                       NULL);
----

[NOTE]
This function is not available in scripting API.

==== hashtable_set_with_size

_WeeChat ≥ 0.3.3, updated in 0.4.2._

Add or update item in a hashtable with size for key and value.

Prototype:

[source,C]
----
struct t_hashtable_item *weechat_hashtable_set_with_size (struct t_hashtable *hashtable,
                                                          const void *key, int key_size,
                                                          const void *value, int value_size);
----

Arguments:

* _hashtable_: hashtable pointer
* _key_: key pointer
* _key_size_: size of key (in bytes), used only if type of keys in hashtable
  is "buffer"
* _value_: value pointer
* _value_size_: size of value (in bytes), used only if type of values in
  hashtable is "buffer"

Return value:

* pointer to item created/updated, NULL if error

C example:

[source,C]
----
weechat_hashtable_set_with_size (hashtable, "my_key", 0,
                                 my_buffer, sizeof (my_buffer_struct));
----

[NOTE]
This function is not available in scripting API.

==== hashtable_set

_WeeChat ≥ 0.3.3, updated in 0.4.2._

Add or update item in a hashtable.

Prototype:

[source,C]
----
struct t_hashtable_item *weechat_hashtable_set (struct t_hashtable *hashtable,
                                                const void *key, const void *value);
----

Arguments:

* _hashtable_: hashtable pointer
* _key_: key pointer
* _value_: value pointer

Return value:

* pointer to item created/updated, NULL if error

C example:

[source,C]
----
weechat_hashtable_set (hashtable, "my_key", "my_value");
----

[NOTE]
This function is not available in scripting API.

==== hashtable_get

_WeeChat ≥ 0.3.3._

Get value associated with a key in a hashtable.

Prototype:

[source,C]
----
void *weechat_hashtable_get (struct t_hashtable *hashtable, void *key);
----

Arguments:

* _hashtable_: hashtable pointer
* _key_: key pointer

Return value:

* value for key, NULL if key is not found

C example:

[source,C]
----
void *value = weechat_hashtable_get (hashtable, "my_key");
----

[NOTE]
This function is not available in scripting API.

==== hashtable_has_key

_WeeChat ≥ 0.3.4._

Check if a key is in the hashtable.

Prototype:

[source,C]
----
int weechat_hashtable_has_key (struct t_hashtable *hashtable, void *key);
----

Arguments:

* _hashtable_: hashtable pointer
* _key_: key pointer

Return value:

* 1 if key is in hashtable, 0 if key is not in hashtable

C example:

[source,C]
----
if (weechat_hashtable_has_key (hashtable, "my_key"))
{
    /* key is in hashtable */
    /* ... */
}
----

[NOTE]
This function is not available in scripting API.

==== hashtable_map

_WeeChat ≥ 0.3.3._

Call a function on all hashtable entries.

Prototype:

[source,C]
----
void weechat_hashtable_map (struct t_hashtable *hashtable,
                            void (*callback_map)(void *data,
                                                 struct t_hashtable *hashtable,
                                                 const void *key,
                                                 const void *value),
                            void *callback_map_data);
----

Arguments:

* _hashtable_: hashtable pointer
* _callback_map_: function called for each entry in hashtable
* _callback_map_data_: pointer given to map callback when it is called

C example:

[source,C]
----
void
map_cb (void *data, struct t_hashtable *hashtable,
        const void *key, const void *value)
{
    /* display key and value (they are both strings here) */
    weechat_printf (NULL, "key: '%s', value: '%s'",
                    (const char *)key,
                    (const char *)value);
}
/* ... */
weechat_hashtable_map (hashtable, &map_cb, NULL);
----

[NOTE]
This function is not available in scripting API.

==== hashtable_map_string

_WeeChat ≥ 0.3.7._

Call a function on all hashtable entries, sending keys and values as strings.

Prototype:

[source,C]
----
void weechat_hashtable_map_string (struct t_hashtable *hashtable,
                                   void (*callback_map)(void *data,
                                                        struct t_hashtable *hashtable,
                                                        const char *key,
                                                        const char *value),
                                   void *callback_map_data);
----

Arguments:

* _hashtable_: hashtable pointer
* _callback_map_: function called for each entry in hashtable
* _callback_map_data_: pointer given to map callback when it is called

[NOTE]
The strings _key_ and _value_ sent to callback are temporary strings, they
are deleted after call to callback.

C example:

[source,C]
----
void
map_cb (void *data, struct t_hashtable *hashtable,
        const char *key, const char *value)
{
    /* display key and value */
    weechat_printf (NULL, "key: '%s', value: '%s'",
                    key, value);
}
/* ... */
weechat_hashtable_map_string (hashtable, &map_cb, NULL);
----

[NOTE]
This function is not available in scripting API.

==== hashtable_dup

_WeeChat ≥ 1.0._

Duplicate a hashtable.

Prototype:

[source,C]
----
struct t_hashtable *weechat_hashtable_dup (struct t_hashtable *hashtable);
----

Arguments:

* _hashtable_: hashtable pointer

Return value:

* duplicated hashtable

C example:

[source,C]
----
struct t_hashtable *new_hashtable = weechat_hashtable_dup (hashtable);
----

[NOTE]
This function is not available in scripting API.

==== hashtable_get_integer

_WeeChat ≥ 0.3.3._

Return integer value of a hashtable property.

Prototype:

[source,C]
----
int weechat_hashtable_get_integer (struct t_hashtable *hashtable,
                                   void *property);
----

Arguments:

* _hashtable_: hashtable pointer
* _property_: property name:
** _size_: size of internal array "htable" in hashtable
** _items_count_: number of items in hashtable

Return value:

* integer value of property

C example:

[source,C]
----
int items_count = weechat_hashtable_get_integer (hashtable, "items_count");
----

[NOTE]
This function is not available in scripting API.

==== hashtable_get_string

_WeeChat ≥ 0.3.4._

Return string value of a hashtable property.

Prototype:

[source,C]
----
const char *weechat_hashtable_get_string (struct t_hashtable *hashtable,
                                          const char *property);
----

Arguments:

* _hashtable_: hashtable pointer
* _property_: property name:
** _type_keys_: type for keys:
*** _integer_: integer
*** _string_: string
*** _pointer_: pointer
*** _buffer_: buffer
*** _time_: time
** _type_values_: type for values:
*** _integer_: integer
*** _string_: string
*** _pointer_: pointer
*** _buffer_: buffer
*** _time_: time
** _keys_: string with list of keys (format: "key1,key2,key3")
** _keys_sorted_: string with list of sorted keys (format: "key1,key2,key3")
** _values_: string with list of values (format: "value1,value2,value3")
** _keys_values_: string with list of keys and values
   (format: "key1:value1,key2:value2,key3:value3")
** _keys_values_sorted_: string with list of keys and values (sorted by keys)
   (format: "key1:value1,key2:value2,key3:value3")

Return value:

* string value of property

C examples:

[source,C]
----
weechat_printf (NULL, "keys are type: %s",
                weechat_hashtable_get_string (hashtable, "type_keys"));
weechat_printf (NULL, "list of keys: %s",
                weechat_hashtable_get_string (hashtable, "keys"));
----

[NOTE]
This function is not available in scripting API.

==== hashtable_set_pointer

_WeeChat ≥ 0.3.4._

Set pointer value of a hashtable property.

Prototype:

[source,C]
----
void weechat_hashtable_set_pointer (struct t_hashtable *hashtable,
                                    const char *property, void *pointer);
----

Arguments:

* _hashtable_: hashtable pointer
* _property_: property name:
** _callback_free_key_: set callback function used to free keys in hashtable
   _(WeeChat ≥ 0.4.2)_
** _callback_free_value_: set callback function used to free values in hashtable
* _pointer_: new pointer value for property

C example:

[source,C]
----
void
my_free_value_cb (struct t_hashtable *hashtable, const void *key, void *value)
{
    /* ... */
}

void
my_free_key_cb (struct t_hashtable *hashtable, void *key)
{
    /* ... */
}

weechat_hashtable_set_pointer (hashtable, "callback_free_value", &my_free_value_cb);
weechat_hashtable_set_pointer (hashtable, "callback_free_key", &my_free_key_cb);
----

[NOTE]
This function is not available in scripting API.

==== hashtable_add_to_infolist

_WeeChat ≥ 0.3.3._

Add hashtable items to an infolist item.

Prototype:

[source,C]
----
int weechat_hashtable_add_to_infolist (struct t_hashtable *hashtable,
                                       struct t_infolist_item *infolist_item,
                                       const char *prefix);
----

Arguments:

* _hashtable_: hashtable pointer
* _infolist_item_: infolist item pointer
* _prefix_: string used as prefix for names in infolist

Return value:

* 1 if OK, 0 if error

C example:

[source,C]
----
weechat_hashtable_add_to_infolist (hashtable, infolist_item, "testhash");

/* if hashtable contains:
     "key1" => "value 1"
     "key2" => "value 2"
   then following variables will be added to infolist item:
     "testhash_name_00000"  = "key1"
     "testhash_value_00000" = "value 1"
     "testhash_name_00001"  = "key2"
     "testhash_value_00001" = "value 2"
*/
----

[NOTE]
This function is not available in scripting API.

==== hashtable_add_from_infolist

_WeeChat ≥ 2.2._

Add infolist items in a hashtable.

Prototype:

[source,C]
----
int weechat_hashtable_add_from_infolist (struct t_hashtable *hashtable,
                                         struct t_infolist *infolist,
                                         const char *prefix);
----

Arguments:

* _hashtable_: hashtable pointer
* _infolist_: infolist pointer
* _prefix_: string used as prefix for names in infolist

Return value:

* 1 if OK, 0 if error

C example:

[source,C]
----
weechat_hashtable_add_from_infolist (hashtable, infolist, "testhash");

/* if infolist contains:
     "testhash_name_00000"  = "key1"
     "testhash_value_00000" = "value 1"
     "testhash_name_00001"  = "key2"
     "testhash_value_00001" = "value 2"
   then following variables will be added to hashtable:
     "key1" => "value 1"
     "key2" => "value 2"
*/
----

[NOTE]
This function is not available in scripting API.

==== hashtable_remove

_WeeChat ≥ 0.3.3._

Remove an item from a hashtable.

Prototype:

[source,C]
----
void weechat_hashtable_remove (struct t_hashtable *hashtable, const void *key);
----

Arguments:

* _hashtable_: hashtable pointer
* _key_: key pointer

C example:

[source,C]
----
weechat_hashtable_remove (hashtable, "my_key");
----

[NOTE]
This function is not available in scripting API.

==== hashtable_remove_all

_WeeChat ≥ 0.3.3._

Remove all items from a hashtable.

Prototype:

[source,C]
----
void weechat_hashtable_remove_all (struct t_hashtable *hashtable);
----

Arguments:

* _hashtable_: hashtable pointer

C example:

[source,C]
----
weechat_hashtable_remove_all (hashtable);
----

[NOTE]
This function is not available in scripting API.

==== hashtable_free

_WeeChat ≥ 0.3.3._

Free a hashtable.

Prototype:

[source,C]
----
void weechat_hashtable_free (struct t_hashtable *hashtable);
----

Arguments:

* _hashtable_: hashtable pointer

C example:

[source,C]
----
weechat_hashtable_free (hashtable);
----

[NOTE]
This function is not available in scripting API.

[[configuration_files]]
=== Configuration files

Functions for configuration files.

==== config_new

_Updated in 1.5._

Create a new configuration file.

Prototype:

[source,C]
----
struct t_config_file *weechat_config_new (const char *name,
                                          int (*callback_reload)(const void *pointer,
                                                                 void *data,
                                                                 struct t_config_file *config_file),
                                          const void *callback_reload_pointer,
                                          void *callback_reload_data);
----

Arguments:

* _name_: name of configuration file (without path or extension)
* _callback_reload_: function called when configuration file is reloaded with
  `/reload` (optional, can be NULL, see below), arguments and return value:
** _const void *pointer_: pointer
** _void *data_: pointer
** _struct t_config_file *config_file_: configuration file pointer
** return value:
*** _WEECHAT_CONFIG_READ_OK_
*** _WEECHAT_CONFIG_READ_MEMORY_ERROR_
*** _WEECHAT_CONFIG_READ_FILE_NOT_FOUND_
* _callback_reload_pointer_: pointer given to callback when it is called by
  WeeChat
* _callback_reload_data_: pointer given to callback when it is called by
  WeeChat; if not NULL, it must have been allocated with malloc (or similar
  function) and it is automatically freed when the configuration file is freed

Reload callback:

* The callback must only call the function <<_config_reload,config_reload>>,
  it must not remove the configuration file.
* A callback is needed only if it does some things before and/or after the
  call to the function <<_config_reload,config_reload>>. +
  If no callback is given, WeeChat will call its internal reload function,
  so the configuration file will be reloaded in all cases.

Return value:

* pointer to new configuration file, NULL if an error occurred

[NOTE]
File is NOT created on disk by this function. It will be created by call to
function <<_config_write,config_write>>.
You should call this function only after adding some sections (with
<<_config_new_section,config_new_section>>) and options (with
<<_config_new_option,config_new_option>>).

C example:

[source,C]
----
int
my_config_reload_cb (const void *pointer, void *data,
                     struct t_config_file *config_file)
{
    /* ... */

    return WEECHAT_RC_OK;
}

struct t_config_file *config_file = weechat_config_new ("test",
                                                        &my_config_reload_cb,
                                                        NULL, NULL);
----

Script (Python):

[source,python]
----
# prototype
config_file = weechat.config_new(name, callback_reload, callback_reload_data)

# example
def my_config_reload_cb(data, config_file):
    # ...
    return weechat.WEECHAT_RC_OK

config_file = weechat.config_new("test", "my_config_reload_cb", "")
----

==== config_new_section

_Updated in 1.5._

Create a new section in configuration file.

Prototype:

[source,C]
----
struct t_config_section *weechat_config_new_section (
    struct t_config_file *config_file,
    const char *name,
    int user_can_add_options,
    int user_can_delete_options,
    int (*callback_read)(const void *pointer,
                         void *data,
                         struct t_config_file *config_file,
                         struct t_config_section *section,
                         const char *option_name,
                         const char *value),
    const void *callback_read_pointer,
    void *callback_read_data,
    int (*callback_write)(const void *pointer,
                          void *data,
                          struct t_config_file *config_file,
                          const char *section_name),
    const void *callback_write_pointer,
    void *callback_write_data,
    int (*callback_write_default)(const void *pointer,
                                  void *data,
                                  struct t_config_file *config_file,
                                  const char *section_name),
    const void *callback_write_default_pointer,
    void *callback_write_default_data,
    int (*callback_create_option)(const void *pointer,
                                  void *data,
                                  struct t_config_file *config_file,
                                  struct t_config_section *section,
                                  const char *option_name,
                                  const char *value),
    const void *callback_create_option_pointer,
    void *callback_create_option_data,
    int (*callback_delete_option)(const void *pointer,
                                  void *data,
                                  struct t_config_file *config_file,
                                  struct t_config_section *section,
                                  struct t_config_option *option),
    const void *callback_delete_option_pointer,
    void *callback_delete_option_data);
----

Arguments:

* _config_file_: configuration file pointer
* _name_: name of section
* _user_can_add_options_: 1 if user can create new options in section, or 0 if
  it is forbidden
* _user_can_delete_options_: 1 if user can delete options in section, or 0 if
  it is forbidden
* _callback_read_: function called when an option in section is read from disk
  (should be NULL in most cases, except if options in section need custom
  function), arguments and return value:
** _const void *pointer_: pointer
** _void *data_: pointer
** _struct t_config_file *config_file_: configuration file pointer
** _struct t_config_section *section_: section pointer
** _const char *option_name_: name of option
** _const char *value_: value
** return value:
*** _WEECHAT_CONFIG_READ_OK_
*** _WEECHAT_CONFIG_READ_MEMORY_ERROR_
*** _WEECHAT_CONFIG_READ_FILE_NOT_FOUND_
* _callback_read_pointer_: pointer given to callback when it is called by
  WeeChat
* _callback_read_data_: pointer given to callback when it is called by WeeChat;
  if not NULL, it must have been allocated with malloc (or similar function)
  and it is automatically freed when the section is freed
* _callback_write_: function called when section is written in file (should be
  NULL for most cases, except if section needs to be written by a custom
  function), arguments and return value:
** _const void *pointer_: pointer
** _void *data_: pointer
** _struct t_config_file *config_file_: configuration file pointer
** _struct t_config_section *section_: section pointer
** _const char *section_name_: name of section
** return value:
*** _WEECHAT_CONFIG_WRITE_OK_
*** _WEECHAT_CONFIG_WRITE_ERROR_
*** _WEECHAT_CONFIG_WRITE_MEMORY_ERROR_
* _callback_write_pointer_: pointer given to callback when it is called by
  WeeChat
* _callback_write_data_: pointer given to callback when it is called by WeeChat;
  if not NULL, it must have been allocated with malloc (or similar function)
  and it is automatically freed when the section is freed
* _callback_write_default_: function called when default values for section
  must be written in file, arguments and return value:
** _const void *pointer_: pointer
** _void *data_: pointer
** _struct t_config_file *config_file_: configuration file pointer
** _const char *section_name_: name of section
** return value:
*** _WEECHAT_CONFIG_WRITE_OK_
*** _WEECHAT_CONFIG_WRITE_ERROR_
*** _WEECHAT_CONFIG_WRITE_MEMORY_ERROR_
* _callback_write_default_pointer_: pointer given to callback when it is called
  by WeeChat
* _callback_write_default_data_: pointer given to callback when it is called by
  WeeChat; if not NULL, it must have been allocated with malloc (or similar
  function) and it is automatically freed when the section is freed
* _callback_create_option_: function called when a new option is created in
  section (NULL if section does not allow new options to be created),
  arguments and return value:
** _const void *pointer_: pointer
** _void *data_: pointer
** _struct t_config_file *config_file_: configuration file pointer
** _struct t_config_section *section_: section pointer
** _const char *option_name_: name of option
** _const char *value_: value
** return value:
*** _WEECHAT_CONFIG_OPTION_SET_OK_CHANGED_
*** _WEECHAT_CONFIG_OPTION_SET_OK_SAME_VALUE_
*** _WEECHAT_CONFIG_OPTION_SET_ERROR_
*** _WEECHAT_CONFIG_OPTION_SET_OPTION_NOT_FOUND_
* _callback_create_option_pointer_: pointer given to callback when it is called
  by WeeChat
* _callback_create_option_data_: pointer given to callback when it is called by
  WeeChat; if not NULL, it must have been allocated with malloc (or similar
  function) and it is automatically freed when the section is freed
* _callback_delete_option_: function called when an option is deleted in
  section (NULL if section does not allow options to be deleted),
  arguments and return value:
** _const void *pointer_: pointer
** _void *data_: pointer
** _struct t_config_file *config_file_: configuration file pointer
** _struct t_config_section *section_: section pointer
** _struct t_config_option *option_: option pointer
** return value:
*** _WEECHAT_CONFIG_OPTION_UNSET_OK_NO_RESET_
*** _WEECHAT_CONFIG_OPTION_UNSET_OK_RESET_
*** _WEECHAT_CONFIG_OPTION_UNSET_OK_REMOVED_
*** _WEECHAT_CONFIG_OPTION_UNSET_ERROR_
* _callback_delete_option_pointer_: pointer given to callback when it is called
  by WeeChat
* _callback_delete_option_data_: pointer given to callback when it is called by
  WeeChat; if not NULL, it must have been allocated with malloc (or similar
  function) and it is automatically freed when the section is freed

Return value:

* pointer to new section in configuration file, NULL if an error occurred

C example:

[source,C]
----
int
my_section_read_cb (const void *pointer, void *data,
                    struct t_config_file *config_file,
                    struct t_config_section *section,
                    const char *option_name,
                    const char *value)
{
    /* ... */

    return WEECHAT_CONFIG_READ_OK;
    /* return WEECHAT_CONFIG_READ_MEMORY_ERROR; */
    /* return WEECHAT_CONFIG_READ_FILE_NOT_FOUND; */
}

int
my_section_write_cb (const void *pointer, void *data,
                     struct t_config_file *config_file,
                     const char *section_name)
{
    /* ... */

    return WEECHAT_CONFIG_WRITE_OK;
    /* return WEECHAT_CONFIG_WRITE_ERROR; */
    /* return WEECHAT_CONFIG_WRITE_MEMORY_ERROR; */
}

int
my_section_write_default_cb (const void *pointer, void *data,
                             struct t_config_file *config_file,
                             const char *section_name)
{
    /* ... */

    return WEECHAT_CONFIG_WRITE_OK;
    /* return WEECHAT_CONFIG_WRITE_ERROR; */
    /* return WEECHAT_CONFIG_WRITE_MEMORY_ERROR; */
}

int
my_section_create_option_cb (const void *pointer, void *data,
                             struct t_config_file *config_file,
                             struct t_config_section *section,
                             const char *option_name,
                             const char *value)
{
    /* ... */

    return WEECHAT_CONFIG_OPTION_SET_OK_CHANGED;
    /* return WEECHAT_CONFIG_OPTION_SET_OK_SAME_VALUE; */
    /* return WEECHAT_CONFIG_OPTION_SET_ERROR; */
    /* return WEECHAT_CONFIG_OPTION_SET_OPTION_NOT_FOUND; */
}

int
my_section_delete_option_cb (const void *pointer, void *data,
                             struct t_config_file *config_file,
                             struct t_config_section *section,
                             struct t_config_option *option)
{
    /* ... */

    return WEECHAT_CONFIG_OPTION_UNSET_OK_REMOVED;
    /* return WEECHAT_CONFIG_OPTION_UNSET_OK_NO_RESET; */
    /* return WEECHAT_CONFIG_OPTION_UNSET_OK_RESET; */
    /* return WEECHAT_CONFIG_OPTION_UNSET_ERROR; */
}

/* standard section, user can not add/delete options */
struct t_config_section *new_section1 =
    weechat_config_new_section (config_file, "section1", 0, 0,
                                NULL, NULL, NULL,
                                NULL, NULL, NULL,
                                NULL, NULL, NULL,
                                NULL, NULL, NULL,
                                NULL, NULL, NULL);

/* special section, user can add/delete options, and options need
   callback to be read/written */
struct t_config_section *new_section2 =
    weechat_config_new_section (config_file, "section2", 1, 1,
                                &my_section_read_cb, NULL, NULL,
                                &my_section_write_cb, NULL, NULL,
                                &my_section_write_default_cb, NULL, NULL,
                                &my_section_create_option_cb, NULL, NULL,
                                &my_section_delete_option_cb, NULL, NULL);
----

Script (Python):

[source,python]
----
# prototype
section = weechat.config_new_section(config_file, name,
    user_can_add_options, user_can_delete_options,
    callback_read, callback_read_data,
    callback_write, callback_write_data,
    callback_create_option, callback_create_option_data,
    callback_delete_option, callback_delete_option_data)

# example
def my_section_read_cb(data, config_file, section, option_name, value):
    # ...
    return weechat.WEECHAT_CONFIG_OPTION_SET_OK_CHANGED
    # return weechat.WEECHAT_CONFIG_OPTION_SET_OK_SAME_VALUE
    # return weechat.WEECHAT_CONFIG_OPTION_SET_OPTION_NOT_FOUND
    # return weechat.WEECHAT_CONFIG_OPTION_SET_ERROR

def my_section_write_cb(data, config_file, section_name):
    # ...
    return weechat.WEECHAT_CONFIG_WRITE_OK

def my_section_write_default_cb(data, config_file, section_name):
    # ...
    return weechat.WEECHAT_CONFIG_WRITE_OK

def my_section_create_option_cb(data, config_file, section, option_name, value):
    # ...
    return weechat.WEECHAT_CONFIG_OPTION_SET_OK_SAME_VALUE

def my_section_delete_option_cb(data, config_file, section, option):
    # ...
    return weechat.WEECHAT_CONFIG_OPTION_UNSET_OK_REMOVED

section = weechat.config_new_section(config_file, "section1", 1, 1,
    "my_section_read_cb", "",
    "my_section_write_cb", "",
    "my_section_write_default_cb", "",
    "my_section_create_option_cb", "",
    "my_section_delete_option_cb", "")
----

==== config_search_section

Search a section in a configuration file.

Prototype:

[source,C]
----
struct t_config_section *weechat_config_search_section (
    struct t_config_file *config_file,
    const char *section_name);
----

Arguments:

* _config_file_: configuration file pointer
* _section_name_: name of section to search

Return value:

* pointer to section found, NULL if section was not found

C example:

[source,C]
----
struct t_config_section *section = weechat_config_search_section (config_file,
                                                                  "section");
----

Script (Python):

[source,python]
----
# prototype
section = weechat.config_search_section(config_file, section_name)

# example
section = weechat.config_search_section(config_file, "section")
----

==== config_new_option

_Updated in 1.5._

Create a new option in a section of a configuration file.

Prototype:

[source,C]
----
struct t_config_option *weechat_config_new_option (
    struct t_config_file *config_file,
    struct t_config_section *section,
    const char *name,
    const char *type,
    const char *description,
    const char *string_values,
    int min,
    int max,
    const char *default_value,
    const char *value,
    int null_value_allowed,
    int (*callback_check_value)(const void *pointer,
                                void *data,
                                struct t_config_option *option,
                                const char *value),
    const void *callback_check_value_pointer,
    void *callback_check_value_data,
    void (*callback_change)(const void *pointer,
                            void *data,
                            struct t_config_option *option),
    const void *callback_change_pointer,
    void *callback_change_data,
    void (*callback_delete)(const void *pointer,
                            void *data,
                            struct t_config_option *option),
    const void *callback_delete_pointer,
    void *callback_delete_data);
----

Arguments:

* _config_file_: configuration file pointer
* _section_: section pointer
* _name_: name of option; with WeeChat ≥ 1.4, the name can include a parent
  option name (the value of parent option will be displayed in `/set` command
  output if this option is "null"), the syntax is then:
  "name << file.section.option"
* _type_: type of option:
** _boolean_: boolean value (on/off)
** _integer_: integer value (with optional strings for values)
** _string_: string value
** _color_: color
* _description_: description of option
* _string_values_: values as string (separated by `+|+`), used for type
  _integer_ (optional)
* _min_: minimum value (for type _integer_)
* _max_: maximum value (for type _integer_)
* _default_value_: default value for option (used when option is reset)
* _value_: value for option
* _null_value_allowed_: 1 if _null_ (undefined value) is allowed for option,
  otherwise 0
* _callback_check_value_: function called to check new value for option
  (optional), arguments and return value:
** _const void *pointer_: pointer
** _void *data_: pointer
** _struct t_config_option *option_: option pointer
** _const char *value_: new value for option
** return value:
*** 1 if value is OK
*** 0 if value is invalid
* _callback_check_value_pointer_: pointer given to check_value callback when it
  is called by WeeChat
* _callback_check_value_data_: pointer given to callback when it is called by
  WeeChat; if not NULL, it must have been allocated with malloc (or similar
  function) and it is automatically freed when the option is freed
* _callback_change_: function called when value of option has changed
  (optional), arguments:
** _const void *pointer_: pointer
** _void *data_: pointer
** _struct t_config_option *option_: option pointer
* _callback_change_pointer_: pointer given to change callback when it is called
  by WeeChat
* _callback_change_data_: pointer given to callback when it is called by
  WeeChat; if not NULL, it must have been allocated with malloc (or similar
  function) and it is automatically freed when the option is freed
* _callback_delete_: function called when option will be deleted (optional),
  arguments:
** _const void *pointer_: pointer
** _void *data_: pointer
** _struct t_config_option *option_: option pointer
* _callback_delete_pointer_: pointer given to delete callback when it is called
  by WeeChat
* _callback_delete_data_: pointer given to callback when it is called by
  WeeChat; if not NULL, it must have been allocated with malloc (or similar
  function) and it is automatically freed when the option is freed

Return value:

* pointer to new option in section, NULL if an error

C example:

[source,C]
----
/* boolean */
struct t_config_option *option1 =
    weechat_config_new_option (config_file, section, "option1", "boolean",
                               "My option, type boolean",
                               NULL,
                               0, 0,
                               "on",
                               "on",
                               0,
                               NULL, NULL, NULL,
                               NULL, NULL, NULL,
                               NULL, NULL, NULL);

/* integer */
struct t_config_option *option2 =
    weechat_config_new_option (config_file, section, "option2", "integer",
                               "My option, type integer",
                               NULL,
                               0, 100,
                               "15",
                               "15",
                               0,
                               NULL, NULL, NULL,
                               NULL, NULL, NULL,
                               NULL, NULL, NULL);

/* integer (with string values) */
struct t_config_option *option3 =
    weechat_config_new_option (config_file, section, "option3", "integer",
                               "My option, type integer (with string values)",
                               "top|bottom|left|right",
                               0, 0,
                               "bottom",
                               "bottom",
                               0,
                               NULL, NULL, NULL,
                               NULL, NULL, NULL,
                               NULL, NULL, NULL);

/* string */
struct t_config_option *option4 =
    weechat_config_new_option (config_file, section, "option4", "string",
                               "My option, type string",
                               NULL,
                               0, 0,
                               "test",
                               "test",
                               1,
                               NULL, NULL, NULL,
                               NULL, NULL, NULL,
                               NULL, NULL, NULL);

/* color */
struct t_config_option *option5 =
    weechat_config_new_option (config_file, section, "option5", "color",
                               "My option, type color",
                               NULL,
                               0, 0,
                               "lightblue",
                               "lightblue",
                               0,
                               NULL, NULL, NULL,
                               NULL, NULL, NULL,
                               NULL, NULL, NULL);
----

Script (Python):

[source,python]
----
# prototype
option = weechat.config_new_option(config_file, section, name, type, description,
    string_values, min, max, default_value, value, null_value_allowed,
    callback_check_value, callback_check_value_data,
    callback_change, callback_change_data,
    callback_delete, callback_delete_data)

# example
def option4_check_value_cb(data, option, value):
    # ...
    return 1
    # return 0

def option4_change_cb(data, option):
    # ...

def option4_delete_cb(data, option):
    # ...

option1 = weechat.config_new_option(config_file, section, "option1", "boolean",
    "My option, type boolean",
    "", 0, 0, "on", "on", 0,
    "", "",
    "", "",
    "", "")

option2 = weechat.config_new_option(config_file, section, "option2", "integer",
    "My option, type integer",
    "", 0, 100, "15", "15", 0,
    "", "",
    "", "",
    "", "")

option3 = weechat.config_new_option(config_file, section, "option3", "integer",
    "My option, type integer (with string values)",
    "top|bottom|left|right",
    0, 0, "bottom", "bottom", 0,
    "", "",
    "", "",
    "", "")

option4 = weechat.config_new_option(config_file, section, "option4", "string",
    "My option, type string",
    "", 0, 0, "test", "test", 1,
    "option4_check_value_cb", "",
    "option4_change_cb", "",
    "option4_delete_cb", "")

option5 = weechat.config_new_option(config_file, section, "option5", "color",
    "My option, type color",
    "", 0, 0, "lightblue", "lightblue", 0,
    "", "",
    "", "",
    "", "")
----

[NOTE]
In Ruby, the 3 callbacks + data (6 strings) must be given in an array of 6
strings (due to a Ruby limitation of 15 arguments by function), see the
link:++weechat_scripting.en.html#_ruby++[WeeChat scripting guide] for more info
_(fixed in version 0.4.1)_.

==== config_search_option

Search an option in a section of a configuration file.

Prototype:

[source,C]
----
struct t_config_option *weechat_config_search_option (
    struct t_config_file *config_file,
    struct t_config_section *section,
    const char *option_name);
----

Arguments:

* _config_file_: configuration file pointer
* _section_: section pointer
* _name_: name of option to search

Return value:

* pointer to option found, NULL if option was not found

C example:

[source,C]
----
struct t_config_option *option =
    weechat_config_search_option (config_file, section, "option");
----

Script (Python):

[source,python]
----
# prototype
option = weechat.config_search_option(config_file, section, option_name)

# example
option = weechat.config_search_option(config_file, section, "option")
----

==== config_search_section_option

Search a section and an option in a configuration file or section.

Prototype:

[source,C]
----
void weechat_config_search_section_option (struct t_config_file *config_file,
                                           struct t_config_section *section,
                                           const char *option_name,
                                           struct t_config_section **section_found,
                                           struct t_config_option **option_found);
----

Arguments:

* _config_file_: configuration file pointer
* _section_: section pointer
* _option_name_: option name
* _section_found_: pointer to section pointer, will be set to section of option,
  if found
* _option_found_: pointer to an option pointer, will be set to option pointer,
  if found

C example:

[source,C]
----
struct t_config_section *ptr_section;
struct t_config_option *ptr_option;

weechat_config_search_section_option(config_file,
                                     section,
                                     "option",
                                     &ptr_section,
                                     &ptr_option);
if (ptr_option)
{
    /* option found */
}
else
{
    /* option not found */
}
----

[NOTE]
This function is not available in scripting API.

==== config_search_with_string

Get file/section/option info about an option with full name.

Prototype:

[source,C]
----
void weechat_config_search_with_string (const char *option_name,
                                        struct t_config_file **config_file,
                                        struct t_config_section **section,
                                        struct t_config_option **option,
                                        char **pos_option_name);
----

Arguments:

* _option_name_: full option name (format: "file.section.option")
* _config_file_: pointer to configuration file pointer, will be set with
  pointer to configuration file of option found
* _section_: pointer to section pointer, will be set to section of option, if
  found
* _option_: pointer to an option pointer, will be set to option pointer, if
  found
* _pos_option_name_: pointer to a string pointer, will be set to pointer to
  name of option, if found

C example:

[source,C]
----
struct t_config_file *ptr_config_file;
struct t_config_section *ptr_section;
struct t_config_option *ptr_option;
char *option_name;

weechat_config_search_with_string ("file.section.option",
                                   &ptr_config_file,
                                   &ptr_section,
                                   &ptr_option,
                                   &option_name);
if (ptr_option)
{
    /* option found */
}
else
{
    /* option not found */
}
----

[NOTE]
This function is not available in scripting API.

==== config_string_to_boolean

Check if a text is "true" or "false", as boolean value.

Prototype:

[source,C]
----
int weechat_config_string_to_boolean (const char *text);
----

Arguments:

* _text_: text to analyze

Return value:

* 1 if text is "true" ("on", "yes", "y", "true", "t", "1")
* 0 if text is "false" ("off", "no", "n", "false", "f", "0")

C example:

[source,C]
----
if (weechat_config_string_to_boolean (option_value))
{
    /* value is "true" */
}
else
{
    /* value is "false" */
}
----

Script (Python):

[source,python]
----
# prototype
value = weechat.config_string_to_boolean(text)

# example
if weechat.config_string_to_boolean(text):
    # ...
----

==== config_option_reset

Reset an option to its default value.

Prototype:

[source,C]
----
int weechat_config_option_reset (struct t_config_option *option,
                                 int run_callback);
----

Arguments:

* _option_: option pointer
* _run_callback_: 1 for calling callback if value of option is changed,
  otherwise 0

Return value:

* _WEECHAT_CONFIG_OPTION_SET_OK_CHANGED_ if option value has been reset
* _WEECHAT_CONFIG_OPTION_SET_OK_SAME_VALUE_ if value was not changed
* _WEECHAT_CONFIG_OPTION_SET_ERROR_ if an error occurred

C example:

[source,C]
----
switch (weechat_config_option_reset (option, 1))
{
    case WEECHAT_CONFIG_OPTION_SET_OK_CHANGED:
        /* .... */
        break;
    case WEECHAT_CONFIG_OPTION_SET_OK_SAME_VALUE:
        /* .... */
        break;
    case WEECHAT_CONFIG_OPTION_SET_ERROR:
        /* .... */
        break;
}
----

Script (Python):

[source,python]
----
# prototype
rc = weechat.config_option_reset(option, run_callback)

# example
rc = weechat.config_option_reset(option, 1)
if rc == weechat.WEECHAT_CONFIG_OPTION_SET_OK_CHANGED:
    # ...
elif rc == weechat.WEECHAT_CONFIG_OPTION_SET_OK_SAME_VALUE:
    # ...
elif rc == weechat.WEECHAT_CONFIG_OPTION_SET_ERROR:
    # ...
----

==== config_option_set

Set new value for an option.

Prototype:

[source,C]
----
int weechat_config_option_set (struct t_config_option *option,
                               const char *value, int run_callback);
----

Arguments:

* _option_: option pointer
* _value_: new value for option, special values are possible according to the
  type of option:
** _boolean_:
*** `toggle`: toggle the current value
** _integer_ or _color_:
*** `++N`: add `N` (any integer) to the current value
*** `--N`: subtract `N` (any integer) from the current value
* _run_callback_: 1 for calling change callback if value of option is changed,
  otherwise 0

Return value:

* _WEECHAT_CONFIG_OPTION_SET_OK_CHANGED_ if option value has been changed
* _WEECHAT_CONFIG_OPTION_SET_OK_SAME_VALUE_ if value was not changed
* _WEECHAT_CONFIG_OPTION_SET_ERROR_ if an error occurred

C example:

[source,C]
----
switch (weechat_config_option_set (option, "new_value", 1))
{
    case WEECHAT_CONFIG_OPTION_SET_OK_CHANGED:
        /* .... */
        break;
    case WEECHAT_CONFIG_OPTION_SET_OK_SAME_VALUE:
        /* .... */
        break;
    case WEECHAT_CONFIG_OPTION_SET_ERROR:
        /* .... */
        break;
}
----

Script (Python):

[source,python]
----
# prototype
rc = weechat.config_option_set(option, value, run_callback)

# example
rc = weechat.config_option_set(option, "new_value", 1)
if rc == weechat.WEECHAT_CONFIG_OPTION_SET_OK_CHANGED:
    # ...
elif rc == weechat.WEECHAT_CONFIG_OPTION_SET_OK_SAME_VALUE:
    # ...
elif rc == weechat.WEECHAT_CONFIG_OPTION_SET_ERROR:
    # ...
----

==== config_option_set_null

Set null (undefined value) for an option.

Prototype:

[source,C]
----
int weechat_config_option_set_null (struct t_config_option *option,
                                    int run_callback);
----

Arguments:

* _option_: option pointer
* _run_callback_: 1 for calling change callback if value of option is changed
  (if it was not null), otherwise 0

[NOTE]
You can set value to null only if it is allowed for option (see
<<_config_new_option,config_new_option>>).

Return value:

* _WEECHAT_CONFIG_OPTION_SET_OK_CHANGED_ if option value has been changed
* _WEECHAT_CONFIG_OPTION_SET_OK_SAME_VALUE_ if value was not changed
* _WEECHAT_CONFIG_OPTION_SET_ERROR_ if an error occurred

C example:

[source,C]
----
switch (weechat_config_option_set_null (option, 1))
{
    case WEECHAT_CONFIG_OPTION_SET_OK_CHANGED:
        /* .... */
        break;
    case WEECHAT_CONFIG_OPTION_SET_OK_SAME_VALUE:
        /* .... */
        break;
    case WEECHAT_CONFIG_OPTION_SET_ERROR:
        /* .... */
        break;
}
----

Script (Python):

[source,python]
----
# prototype
rc = weechat.config_option_set_null(option, run_callback)

# example
rc = weechat.config_option_set_null(option, 1)
if rc == weechat.WEECHAT_CONFIG_OPTION_SET_OK_CHANGED:
    # ...
elif rc == weechat.WEECHAT_CONFIG_OPTION_SET_OK_SAME_VALUE:
    # ...
elif rc == weechat.WEECHAT_CONFIG_OPTION_SET_ERROR:
    # ...
----

==== config_option_unset

Unset/reset option.

Prototype:

[source,C]
----
int weechat_config_option_unset (struct t_config_option *option);
----

Arguments:

* _option_: option pointer

Return value:

* _WEECHAT_CONFIG_OPTION_UNSET_OK_NO_RESET_ if option value has not been reset
* _WEECHAT_CONFIG_OPTION_UNSET_OK_RESET_ if option value has been reset
* _WEECHAT_CONFIG_OPTION_UNSET_OK_REMOVED_ if option has been removed
* _WEECHAT_CONFIG_OPTION_UNSET_ERROR_ if an error occurred

C example:

[source,C]
----
switch (weechat_config_option_unset (option))
{
    case WEECHAT_CONFIG_OPTION_UNSET_OK_NO_RESET:
        /* .... */
        break;
    case WEECHAT_CONFIG_OPTION_UNSET_OK_RESET:
        /* .... */
        break;
    case WEECHAT_CONFIG_OPTION_UNSET_OK_REMOVED:
        /* .... */
        break;
    case WEECHAT_CONFIG_OPTION_UNSET_ERROR:
        /* .... */
        break;
}
----

Script (Python):

[source,python]
----
# prototype
rc = weechat.config_option_unset(option)

# example
rc = weechat.config_option_unset(option)
if rc == weechat.WEECHAT_CONFIG_OPTION_UNSET_OK_NO_RESET:
    # ...
elif rc == weechat.WEECHAT_CONFIG_OPTION_UNSET_OK_RESET:
    # ...
elif rc == weechat.WEECHAT_CONFIG_OPTION_UNSET_OK_REMOVED:
    # ...
elif rc == weechat.WEECHAT_CONFIG_OPTION_UNSET_ERROR:
    # ...
----

==== config_option_rename

Rename an option.

Prototype:

[source,C]
----
void weechat_config_option_rename (struct t_config_option *option,
                                   const char *new_name);
----

Arguments:

* _option_: option pointer
* _new_name_: new name for option

C example:

[source,C]
----
weechat_config_option_rename (option, "new_name");
----

Script (Python):

[source,python]
----
# prototype
weechat.config_option_rename(option, new_name)

# example
weechat.config_option_rename(option, "new_name")
----

==== config_option_get_string

_WeeChat ≥ 1.9._

Return string value of an option property.

Prototype:

[source,C]
----
const char *weechat_config_option_get_string (struct t_config_option *option,
                                              const char *property);
----

Arguments:

* _option_: option pointer
* _property_: property name:
** _config_name_: file name
** _section_name_: section name
** _name_: option name
** _parent_name_: name of parent option
** _type_: option type, one of:
*** _boolean_
*** _integer_
*** _string_
*** _color_
** _description_: option description

Return value:

* string value of property

C example:

[source,C]
----
const char *type = weechat_config_option_get_string (option, "type");
----

[NOTE]
This function is not available in scripting API.

==== config_option_get_pointer

Return a pointer on an option property.

Prototype:

[source,C]
----
void *weechat_config_option_get_pointer (struct t_config_option *option,
                                         const char *property);
----

Arguments:

* _option_: option pointer
* _property_: property name:
** _config_file_: configuration file pointer (_struct t_config_file *_)
** _section_: section pointer (_struct t_config_section *_)
** _name_: option name (_char *_)
** _parent_name_: name of parent option (_char *_) _(WeeChat ≥ 1.4)_
** _type_: option type (_int *_)
** _description_: option description (_char *_)
** _string_values_: string values (_char *_)
** _min_: minimum value (_int *_)
** _max_: maximum value (_int *_)
** _default_value_: default value (depends on type)
** _value_: current value (depends on type)
** _prev_option_: previous option pointer (_struct t_config_option *_)
** _next_option_: next option pointer (_struct t_config_option *_)

Return value:

* pointer to property asked

C example:

[source,C]
----
char *description = weechat_config_option_get_pointer (option, "description");
----

[NOTE]
This function is not available in scripting API.

==== config_option_is_null

Check if an option is "null" (undefined value).

Prototype:

[source,C]
----
int weechat_config_option_is_null (struct t_config_option *option);
----

Arguments:

* _option_: option pointer

Return value:

* 1 if value of option is "null"
* 0 if value of option is not "null"

C example:

[source,C]
----
if (weechat_config_option_is_null (option))
{
    /* value is "null" */
}
else
{
    /* value is not "null" */
}
----

Script (Python):

[source,python]
----
# prototype
is_null = weechat.config_option_is_null(option)

# example
if weechat.config_option_is_null(option):
    # ...
----

==== config_option_default_is_null

Check if default value for an option is "null" (undefined value).

Prototype:

[source,C]
----
int weechat_config_option_default_is_null (struct t_config_option *option);
----

Arguments:

* _option_: option pointer

Return value:

* 1 if default value of option is "null"
* 0 if default value of option is not "null"

C example:

[source,C]
----
if (weechat_config_option_default_is_null (option))
{
    /* default value is "null" */
}
else
{
    /* default value is not "null" */
}
----

Script (Python):

[source,python]
----
# prototype
is_null = weechat.config_option_default_is_null(option)

# example
if weechat.config_option_default_is_null(option):
    # ...
----

==== config_boolean

Return boolean value of option.

Prototype:

[source,C]
----
int weechat_config_boolean (struct t_config_option *option);
----

Arguments:

* _option_: option pointer

Return value, depending on the option type:

* _boolean_: boolean value of option (0 or 1)
* _integer_: 0
* _string_: 0
* _color_: 0

C example:

[source,C]
----
struct t_config_option *option = weechat_config_get ("plugin.section.option");
if (weechat_config_boolean (option))
{
    /* value is "true" */
}
else
{
    /* value is "false" */
}
----

Script (Python):

[source,python]
----
# prototype
value = weechat.config_boolean(option)

# example
option = weechat.config_get("plugin.section.option")
if weechat.config_boolean(option):
    # ...
----

==== config_boolean_default

Return default boolean value of option.

Prototype:

[source,C]
----
int weechat_config_boolean_default (struct t_config_option *option);
----

Arguments:

* _option_: option pointer

Return value, depending on the option type:

* _boolean_: default boolean value of option (0 or 1)
* _integer_: 0
* _string_: 0
* _color_: 0

C example:

[source,C]
----
struct t_config_option *option = weechat_config_get ("plugin.section.option");
if (weechat_config_boolean_default (option))
{
    /* value is "true" */
}
else
{
    /* value is "false" */
}
----

Script (Python):

[source,python]
----
# prototype
value = weechat.config_boolean_default(option)

# example
option = weechat.config_get("plugin.section.option")
if weechat.config_boolean_default(option):
    # ...
----

==== config_integer

Return integer value of option.

Prototype:

[source,C]
----
int weechat_config_integer (struct t_config_option *option);
----

Arguments:

* _option_: option pointer

Return value, depending on the option type:

* _boolean_: boolean value of option (0 or 1)
* _integer_: integer value of option
* _string_: 0
* _color_: color index

C example:

[source,C]
----
struct t_config_option *option = weechat_config_get ("plugin.section.option");
int value = weechat_config_integer (option);
----

Script (Python):

[source,python]
----
# prototype
value = weechat.config_integer(option)

# example
option = weechat.config_get("plugin.section.option")
value = weechat.config_integer(option)
----

==== config_integer_default

Return default integer value of option.

Prototype:

[source,C]
----
int weechat_config_integer_default (struct t_config_option *option);
----

Arguments:

* _option_: option pointer

Return value, depending on the option type:

* _boolean_: default boolean value of option (0 or 1)
* _integer_: default integer value of option
* _string_: 0
* _color_: default color index

C example:

[source,C]
----
struct t_config_option *option = weechat_config_get ("plugin.section.option");
int value = weechat_config_integer_default (option);
----

Script (Python):

[source,python]
----
# prototype
value = weechat.config_integer_default(option)

# example
option = weechat.config_get("plugin.section.option")
value = weechat.config_integer_default(option)
----

==== config_string

Return string value of option.

Prototype:

[source,C]
----
const char *weechat_config_string (struct t_config_option *option);
----

Arguments:

* _option_: option pointer

Return value, depending on the option type:

* _boolean_: "on" if value is true, otherwise "off"
* _integer_: string value if the option is an integer with string values,
  otherwise NULL
* _string_: string value of option
* _color_: name of color

C example:

[source,C]
----
struct t_config_option *option = weechat_config_get ("plugin.section.option");
const char *value = weechat_config_string (option);
----

Script (Python):

[source,python]
----
# prototype
value = weechat.config_string(option)

# example
option = weechat.config_get("plugin.section.option")
value = weechat.config_string(option)
----

==== config_string_default

Return default string value of option.

Prototype:

[source,C]
----
const char *weechat_config_string_default (struct t_config_option *option);
----

Arguments:

* _option_: option pointer

Return value, depending on the option type:

* _boolean_: "on" if default value is true, otherwise "off"
* _integer_: default string value if the option is an integer with string
  values, otherwise NULL
* _string_: default string value of option
* _color_: name of default color

C example:

[source,C]
----
struct t_config_option *option = weechat_config_get ("plugin.section.option");
const char *value = weechat_config_string_default (option);
----

Script (Python):

[source,python]
----
# prototype
value = weechat.config_string_default(option)

# example
option = weechat.config_get("plugin.section.option")
value = weechat.config_string_default(option)
----

==== config_color

Return color value of option.

Prototype:

[source,C]
----
const char *weechat_config_color (struct t_config_option *option);
----

Arguments:

* _option_: option pointer

Return value, depending on the option type:

* _boolean_: NULL
* _integer_: NULL
* _string_: NULL
* _color_: name of color

C example:

[source,C]
----
struct t_config_option *option = weechat_config_get ("plugin.section.option");
const char *color = weechat_config_color (option);
----

Script (Python):

[source,python]
----
# prototype
value = weechat.config_color(option)

# example
option = weechat.config_get("plugin.section.option")
value = weechat.config_color(option)
----

==== config_color_default

Return default color value of option.

Prototype:

[source,C]
----
const char *weechat_config_color_default (struct t_config_option *option);
----

Arguments:

* _option_: option pointer

Return value, depending on the option type:

* _boolean_: NULL
* _integer_: NULL
* _string_: NULL
* _color_: name of default color

C example:

[source,C]
----
struct t_config_option *option = weechat_config_get ("plugin.section.option");
const char *color = weechat_config_color_default (option);
----

Script (Python):

[source,python]
----
# prototype
value = weechat.config_color_default(option)

# example
option = weechat.config_get("plugin.section.option")
value = weechat.config_color_default(option)
----

==== config_write_option

Write a line in a configuration file with option and its value (this function
should be called only in "write" or "write_default" callbacks for a section).

Prototype:

[source,C]
----
void weechat_config_write_option (struct t_config_file *config_file,
                                  struct t_config_option *option);
----

Arguments:

* _config_file_: configuration file pointer
* _option_: option pointer

C example:

[source,C]
----
int
my_section_write_cb (const void *pointer, void *data,
                     struct t_config_file *config_file,
                     const char *section_name)
{
    weechat_config_write_line (config_file, "my_section", NULL);

    weechat_config_write_option (config_file, option);

    return WEECHAT_RC_OK;
}
----

Script (Python):

[source,python]
----
# prototype
weechat.config_write_option(config_file, option)

# example
def my_section_write_cb(data, config_file, section_name):
    weechat.config_write_line(config_file, "my_section", "")
    weechat.config_write_option(config_file, option)
    return weechat.WEECHAT_RC_OK
----

==== config_write_line

Write a line in a configuration file (this function should be called only in
"write" or "write_default" callbacks for a section).

Prototype:

[source,C]
----
void weechat_config_write_line (struct t_config_file *config_file,
                                const char *option_name,
                                const char *value, ...);
----

Arguments:

* _config_file_: configuration file pointer
* _option_name_: option name
* _value_: value (if NULL, then line with section name is written, for
  example: "[section]")

C example:

[source,C]
----
int
my_section_write_cb (const void *pointer, void *data,
                     struct t_config_file *config_file,
                     const char *section_name)
{
    weechat_config_write_line (config_file, "my_section", NULL);

    weechat_config_write_line (config_file, "option", "%s;%d",
                               "value", 123);

    return WEECHAT_RC_OK;
}
----

Script (Python):

[source,python]
----
# prototype
weechat.config_write_line(config_file, option_name, value)

# example
def my_section_write_cb(data, config_file, section_name):
    weechat.config_write_line(config_file, "my_section", "")
    weechat.config_write_line(config_file, "option", "value")
    return weechat.WEECHAT_RC_OK
----

==== config_write

Write configuration file to disk.

Prototype:

[source,C]
----
int weechat_config_write (struct t_config_file *config_file);
----

Arguments:

* _config_file_: configuration file pointer

Return value:

* _WEECHAT_CONFIG_WRITE_OK_ if configuration was written
* _WEECHAT_CONFIG_WRITE_MEMORY_ERROR_ if there was not enough memory
* _WEECHAT_CONFIG_WRITE_ERROR_ if another error occurred

C example:

[source,C]
----
switch (weechat_config_write (config_file))
{
    case WEECHAT_CONFIG_WRITE_OK:
        /* ... */
        break;
    case WEECHAT_CONFIG_WRITE_MEMORY_ERROR:
        /* ... */
        break;
    case WEECHAT_CONFIG_WRITE_ERROR:
        /* ... */
        break;
}
----

Script (Python):

[source,python]
----
# prototype
rc = weechat.config_write(config_file)

# example
rc = weechat.config_write(config_file)
if rc == weechat.WEECHAT_CONFIG_WRITE_OK:
    # ...
elif rc == weechat.WEECHAT_CONFIG_WRITE_MEMORY_ERROR:
    # ...
elif rc == weechat.WEECHAT_CONFIG_WRITE_ERROR:
    # ...
----

==== config_read

Read configuration file from disk.

Prototype:

[source,C]
----
int weechat_config_read (struct t_config_file *config_file);
----

Arguments:

* _config_file_: configuration file pointer

Return value:

* _WEECHAT_CONFIG_READ_OK_ if configuration was loaded
* _WEECHAT_CONFIG_READ_MEMORY_ERROR_ if there was not enough memory
* _WEECHAT_CONFIG_READ_FILE_NOT_FOUND_ if file was not found

C example:

[source,C]
----
switch (weechat_config_read (config_file))
{
    case WEECHAT_CONFIG_READ_OK:
        /* ... */
        break;
    case WEECHAT_CONFIG_READ_MEMORY_ERROR:
        /* ... */
        break;
    case WEECHAT_CONFIG_READ_FILE_NOT_FOUND:
        /* ... */
        break;
}
----

Script (Python):

[source,python]
----
# prototype
rc = weechat.config_read(config_file)

# example
rc = weechat.config_read(config_file)
if rc == weechat.WEECHAT_CONFIG_READ_OK:
    # ...
elif rc == weechat.WEECHAT_CONFIG_READ_MEMORY_ERROR:
    # ...
elif rc == weechat.WEECHAT_CONFIG_READ_FILE_NOT_FOUND:
    # ...
----

==== config_reload

Reload configuration file from disk.

Prototype:

[source,C]
----
int weechat_config_reload (struct t_config_file *config_file);
----

Arguments:

* _config_file_: configuration file pointer

Return value:

* _WEECHAT_CONFIG_READ_OK_ if configuration was reloaded
* _WEECHAT_CONFIG_READ_MEMORY_ERROR_ if there was not enough memory
* _WEECHAT_CONFIG_READ_FILE_NOT_FOUND_ if file was not found

C example:

[source,C]
----
switch (weechat_config_reload (config_file))
{
    case WEECHAT_CONFIG_READ_OK:
        /* ... */
        break;
    case WEECHAT_CONFIG_READ_MEMORY_ERROR:
        /* ... */
        break;
    case WEECHAT_CONFIG_READ_FILE_NOT_FOUND:
        /* ... */
        break;
}
----

Script (Python):

[source,python]
----
# prototype
rc = weechat.config_reload(config_file)

# example
rc = weechat.config_reload(config_file)
if rc == weechat.WEECHAT_CONFIG_READ_OK:
    # ...
elif rc == weechat.WEECHAT_CONFIG_READ_MEMORY_ERROR:
    # ...
elif rc == weechat.WEECHAT_CONFIG_READ_FILE_NOT_FOUND:
    # ...
----

==== config_option_free

Free an option.

Prototype:

[source,C]
----
void weechat_config_option_free (struct t_config_option *option);
----

Arguments:

* _option_: option pointer

C example:

[source,C]
----
weechat_config_option_free (option);
----

Script (Python):

[source,python]
----
# prototype
weechat.config_option_free(option)

# example
weechat.config_option_free(option)
----

==== config_section_free_options

Free all options in a section.

Prototype:

[source,C]
----
void weechat_config_section_free_options (struct t_config_section *section);
----

Arguments:

* _section_: section pointer

C example:

[source,C]
----
weechat_config_section_free_options (section);
----

Script (Python):

[source,python]
----
# prototype
weechat.config_section_free_options(section)

# example
weechat.config_section_free_options(section)
----

==== config_section_free

Free a section.

Prototype:

[source,C]
----
void weechat_config_section_free (struct t_config_section *section);
----

Arguments:

* _section_: section pointer

C example:

[source,C]
----
weechat_config_section_free (section);
----

Script (Python):

[source,python]
----
# prototype
weechat.config_section_free(section)

# example
weechat.config_section_free(section)
----

==== config_free

Free a configuration file.

Prototype:

[source,C]
----
void weechat_config_free (struct t_config_file *config_file);
----

Arguments:

* _config_file_: configuration file pointer

C example:

[source,C]
----
weechat_config_free (config_file);
----

Script (Python):

[source,python]
----
# prototype
weechat.config_free(config_file)

# example
weechat.config_free(config_file)
----

==== config_get

Search an option with full name.

Prototype:

[source,C]
----
struct t_config_option *weechat_config_get (const char *option_name);
----

Arguments:

* _option_name_: full option name (format: "file.section.option")

Return value:

* pointer to option found, NULL if option was not found

C example:

[source,C]
----
struct t_config_option *option = weechat_config_get ("weechat.look.item_time_format");
----

Script (Python):

[source,python]
----
# prototype
option = weechat.config_get(option_name)

# example
option = weechat.config_get("weechat.look.item_time_format")
----

==== config_get_plugin

Search an option in plugins configuration file (plugins.conf).

Prototype:

[source,C]
----
const char *weechat_config_get_plugin (const char *option_name);
----

Arguments:

* _option_name_: option name, WeeChat will add prefix "plugins.var.xxx."
  (where "xxx" is current plugin name)

Return value:

* value of option found, NULL if option was not found

C example:

[source,C]
----
/* if current plugin is "test", then look for value of option
   "plugins.var.test.option" in file plugins.conf */
char *value = weechat_config_get_plugin ("option");
----

Script (Python):

[source,python]
----
# prototype
value = weechat.config_get_plugin(option_name)

# example
value = weechat.config_get_plugin("option")
----

==== config_is_set_plugin

Check if option is set in plugins configuration file (plugins.conf).

Prototype:

[source,C]
----
int weechat_config_is_set_plugin (const char *option_name);
----

Arguments:

* _option_name_: option name, WeeChat will add prefix "plugins.var.xxx."
  (where "xxx" is current plugin name)

Return value:

* 1 if option is set, 0 if option does not exist

C example:

[source,C]
----
if (weechat_config_is_set_plugin ("option"))
{
    /* option is set */
}
else
{
    /* option does not exist */
}
----

Script (Python):

[source,python]
----
# prototype
value = weechat.config_is_set_plugin(option_name)

# example
if weechat.config_is_set_plugin("option"):
    # option is set
    # ...
else:
    # option does not exist
    # ...
----

==== config_set_plugin

Set new value for option in plugins configuration file (plugins.conf).

Prototype:

[source,C]
----
int weechat_config_set_plugin (const char *option_name, const char *value);
----

Arguments:

* _option_name_: option name, WeeChat will add prefix "plugins.var.xxx."
  (where "xxx" is current plugin name)
* _value_: new value for option

Return value:

* _WEECHAT_CONFIG_OPTION_SET_OK_CHANGED_ if option value has been changed
* _WEECHAT_CONFIG_OPTION_SET_OK_SAME_VALUE_ if value was not changed
* _WEECHAT_CONFIG_OPTION_SET_OPTION_NOT_FOUND_ if option was not found
* _WEECHAT_CONFIG_OPTION_SET_ERROR_ if other error occurred

C example:

[source,C]
----
switch (weechat_config_set_plugin ("option", "test_value"))
{
    case WEECHAT_CONFIG_OPTION_SET_OK_CHANGED:
        /* ... */
        break;
    case WEECHAT_CONFIG_OPTION_SET_OK_SAME_VALUE:
        /* ... */
        break;
    case WEECHAT_CONFIG_OPTION_SET_OPTION_NOT_FOUND:
        /* ... */
        break;
    case WEECHAT_CONFIG_OPTION_SET_ERROR:
        /* ... */
        break;
}
----

Script (Python):

[source,python]
----
# prototype
rc = weechat.config_set_plugin(option_name, value)

# example
rc = weechat.config_set_plugin("option", "test_value")
if rc == weechat.WEECHAT_CONFIG_OPTION_SET_OK_CHANGED:
    # ...
elif rc == weechat.WEECHAT_CONFIG_OPTION_SET_OK_SAME_VALUE:
    # ...
elif rc == weechat.WEECHAT_CONFIG_OPTION_SET_OPTION_NOT_FOUND:
    # ...
elif rc == weechat.WEECHAT_CONFIG_OPTION_SET_ERROR:
    # ...
----

==== config_set_desc_plugin

_WeeChat ≥ 0.3.5._

Set description for option in plugins configuration file (plugins.conf).

Prototype:

[source,C]
----
void weechat_config_set_desc_plugin (const char *option_name,
                                     const char *description);
----

Arguments:

* _option_name_: option name, WeeChat will add prefix "plugins.desc.xxx."
  (where "xxx" is current plugin name)
* _description_: description for option

[NOTE]
It is not a problem if option (plugins.var.xxx.option_name) does not exist.
A future creation of option with this name will use this description.

C example:

[source,C]
----
weechat_config_set_desc_plugin ("option", "description of option");
----

Script (Python):

[source,python]
----
# prototype
weechat.config_set_desc_plugin(option_name, description)

# example
version = weechat.info_get("version_number", "") or 0
if int(version) >= 0x00030500:
    weechat.config_set_desc_plugin("option", "description of option")
----

==== config_unset_plugin

Unset option in plugins configuration file (plugins.conf).

Prototype:

[source,C]
----
int weechat_config_unset_plugin (const char *option_name);
----

Arguments:

* _option_name_: option name, WeeChat will add prefix "plugins.var.xxx."
  (where xxx is current plugin name)

Return value:

* _WEECHAT_CONFIG_OPTION_UNSET_OK_NO_RESET_ if option value has not been reset
* _WEECHAT_CONFIG_OPTION_UNSET_OK_RESET_ if option value has been reset
* _WEECHAT_CONFIG_OPTION_UNSET_OK_REMOVED_ if option has been removed
* _WEECHAT_CONFIG_OPTION_UNSET_ERROR_ if an error occurred

C example:

[source,C]
----
switch (weechat_config_unset_plugin ("option"))
{
    case WEECHAT_CONFIG_OPTION_UNSET_OK_NO_RESET:
        /* ... */
        break;
    case WEECHAT_CONFIG_OPTION_UNSET_OK_RESET:
        /* ... */
        break;
    case WEECHAT_CONFIG_OPTION_UNSET_OK_REMOVED:
        /* ... */
        break;
    case WEECHAT_CONFIG_OPTION_UNSET_ERROR:
        /* ... */
        break;
}
----

Script (Python):

[source,python]
----
# prototype
rc = weechat.config_unset_plugin(option_name)

# example
rc = weechat.config_unset_plugin("option")
if rc == weechat.WEECHAT_CONFIG_OPTION_UNSET_OK_NO_RESET:
    # ...
elif rc == weechat.WEECHAT_CONFIG_OPTION_UNSET_OK_RESET:
    # ...
elif rc == weechat.WEECHAT_CONFIG_OPTION_UNSET_OK_REMOVED:
    # ...
elif rc == weechat.WEECHAT_CONFIG_OPTION_UNSET_ERROR:
    # ...
----

[[key_bindings]]
=== Key bindings

Functions for key bindings.

==== key_bind

_WeeChat ≥ 0.3.6, updated in 1.8._

Add new key bindings.

[NOTE]
Unlike command `/key bind`, this function will never change an existing key
binding, only new keys are created. To remove a key binding, use <<_key_unbind,key_unbind>>.

Prototype:

[source,C]
----
int weechat_key_bind (const char *context, struct t_hashtable *keys);
----

:key_bind_quiet: __quiet

Arguments:

* _context_: context for keys:
** _default_: default context (common actions)
** _search_: search context (when searching text in buffer)
** _cursor_: free movement of cursor on screen
** _mouse_: keys for mouse events
* _keys_: hashtable with key bindings; it can contain following special keys:
** _{key_bind_quiet}_: do not display the keys added in _core_ buffer
   _(WeeChat ≥ 1.8)_

Return value:

* number of key bindings added

C example:

[source,C]
----
struct t_hashtable *keys = weechat_hashtable_new (8,
                                                  WEECHAT_HASHTABLE_STRING,
                                                  WEECHAT_HASHTABLE_STRING,
                                                  NULL,
                                                  NULL);
if (keys)
{
    weechat_hashtable_set (keys, "@chat(plugin.buffer):button1", "hsignal:test_mouse");
    weechat_hashtable_set (keys, "@chat(plugin.buffer):wheelup", "/mycommand up");
    weechat_hashtable_set (keys, "@chat(plugin.buffer):wheeldown", "/mycommand down");
    weechat_key_bind ("mouse", keys);
    weechat_hashtable_free (keys);
}
----

Script (Python):

[source,python]
----
# prototype
num_keys = weechat.key_bind(context, keys)

# example
keys = {"@chat(python.test):button1": "hsignal:test_mouse",
        "@chat(python.test):wheelup": "/mycommand up",
        "@chat(python.test):wheeldown": "/mycommand down"}
weechat.key_bind("mouse", keys)
----

==== key_unbind

_WeeChat ≥ 0.3.6, updated in 2.0._

Remove key binding(s).

[WARNING]
When calling this function, ensure that you will not remove a user key binding.

Prototype:

[source,C]
----
int weechat_key_unbind (const char *context, const char *key);
----

Arguments:

* _context_: context for keys (see <<_key_bind,key_bind>>)
* _key_: key to remove or a special value "area:XXX" to remove all keys having
  _XXX_ as first or second area; if the key starts with "quiet:", the keys
  removed are not displayed in _core_ buffer _(WeeChat ≥ 2.0)_.

Return value:

* number of key bindings removed

C examples:

[source,C]
----
/* remove a single key */
weechat_key_unbind ("mouse", "@chat(plugin.buffer):button1");

/* remove all keys with area "chat(plugin.buffer)" */
weechat_key_unbind ("mouse", "area:chat(plugin.buffer)");
----

Script (Python):

[source,python]
----
# prototype
num_keys = weechat.key_unbind(context, key)

# examples

# remove a single key
weechat.key_unbind("mouse", "@chat(plugin.buffer):button1")

# remove all keys with area "chat(python.test)"
weechat.key_unbind("mouse", "area:chat(python.test)")
----

[[display]]
=== Display

Functions to display text in buffers.

==== prefix

Return a prefix.

Prototype:

[source,C]
----
const char *weechat_prefix (const char *prefix);
----

Arguments:

* _prefix_: name of prefix (see table below)

Return value:

* prefix value (string with prefix and color codes), empty string if prefix is
  not found

List of prefixes:

[width="70%",cols="^2m,^1,^3,5",options="header"]
|===
| Prefix  | Value   | Color      | Description
| error   | `+=!=+` | yellow     | Error message.
| network | `+--+`  | magenta    | Message from network.
| action  | `+*+`   | white      | Self action.
| join    | `+-->+` | lightgreen | Someone joins current chat.
| quit    | `+<--+` | lightred   | Someone leaves current chat.
|===

[NOTE]
Values and colors can be customized with command `/set`.

C example:

[source,C]
----
weechat_printf (NULL, "%sThis is an error...", weechat_prefix ("error"));
----

Script (Python):

[source,python]
----
# prototype
value = weechat.prefix(prefix)

# example
weechat.prnt("", "%sThis is an error..." % weechat.prefix("error"))
----

==== color

Return a string color code for display.

Prototype:

[source,C]
----
const char *weechat_color (const char *color_name);
----

Arguments:

* _color_name_: name of color, one of:
** WeeChat color option name (from weechat.color.xxx), for example
   _chat_delimiters_
** option name (format: file.section.option), for example
   _irc.color.message_quit_ _(WeeChat ≥ 1.2)_
** color with optional attributes/background (see below)
** attribute:
*** _bold_: set bold
*** _-bold_: remove bold
*** _reverse_: set reverse
*** _-reverse_: remove reverse
*** _italic_: set italic
*** _-italic_: remove italic
*** _underline_: set underline
*** _-underline_: remove underline
*** _emphasis_: toggle the emphasis for text (note: this should be used only in
    bars, because WeeChat uses text emphasis when searching text in buffer)
    _(WeeChat ≥ 0.4.2)_
** bar color name:
*** _bar_fg_: foreground color for bar
*** _bar_delim_: delimiters color for bar
*** _bar_bg_: background color for bar
** reset:
*** _reset_: reset color and attributes
*** _resetcolor_: reset color (keep attributes) _(WeeChat ≥ 0.3.6)_

Format of color is: attributes (optional) + color name + ",background"
(optional). Possible attributes are:

* `+*+`: bold text
* `+!+`: reverse video
* `+/+`: italic
* `+_+`: underlined text
* `+|+`: keep attributes: do not reset bold/reverse/italic/underlined when
  changing color _(WeeChat ≥ 0.3.6)_

Examples:

* `+yellow+`: yellow
* `+_green+`: underlined green
* `+*214+`: bold orange
* `+yellow,red+`: yellow on red
* `+|cyan+`: cyan (and keep any attribute which was set previously)

Return value:

* string with color code, or an empty string if color is not found

C example:

[source,C]
----
weechat_printf (NULL, "Color: %sblue %sdefault color %syellow on red",
                weechat_color ("blue"),
                weechat_color ("chat"),
                weechat_color ("yellow,red"));
----

Script (Python):

[source,python]
----
# prototype
value = weechat.color(color_name)

# example
weechat.prnt("", "Color: %sblue %sdefault color %syellow on red"
    % (weechat.color("blue"), weechat.color("chat"), weechat.color("yellow,red")))
----

==== printf

Display a message on a buffer.

Prototype:

[source,C]
----
void weechat_printf (struct t_gui_buffer *buffer, const char *message, ...);
----

This function is a shortcut for function printf_date_tags. These two calls give
exactly same result:

[source,C]
----
weechat_printf (buffer, "message");
weechat_printf_date_tags (buffer, 0, NULL, "message");
----

Arguments:

* _buffer_: buffer pointer, if NULL, message is displayed on WeeChat buffer
* _message_: message to display

[NOTE]
The first tabulation in message ("\t") is used to separate prefix from message. +
If your message has some tabs and if you don't want prefix, then use a space,
a tab, then message (see example below): this will disable prefix (the space
before tab will not be displayed).

[NOTE]
With two tabs ("\t") at beginning of message, time will not be displayed and
message will have no alignment at all. Moreover, the date in message will be
set to 0.

C example:

[source,C]
----
weechat_printf (NULL, "Hello on WeeChat buffer");
weechat_printf (buffer, "Hello on this buffer");
weechat_printf (buffer, "%sThis is an error!", weechat_prefix ("error"));
weechat_printf (buffer, " \tMessage without prefix but with \t some \t tabs");
weechat_printf (buffer, "\t\tMessage without time/alignment");
weechat_printf (buffer, "\t\t");  /* empty line (without time) */
----

Script (Python):

[source,python]
----
# prototype
weechat.prnt(buffer, message)

# example
weechat.prnt("", "Hello on WeeChat buffer")
weechat.prnt(buffer, "Hello on this buffer")
weechat.prnt(buffer, "%sThis is an error!" % weechat.prefix("error"))
weechat.prnt(buffer, " \tMessage without prefix but with \t some \t tabs")
weechat.prnt(buffer, "\t\tMessage without time/alignment")
weechat.prnt(buffer, "\t\t")  # empty line (without time)
----

[NOTE]
Function is called "print" in scripts ("prnt" in Python).

==== printf_date_tags

Display a message on a buffer, using a custom date and tags.

Prototype:

[source,C]
----
void weechat_printf_date_tags (struct t_gui_buffer *buffer, time_t date,
                               const char *tags, const char *message, ...);
----

Arguments:

* _buffer_: buffer pointer, if NULL, message is displayed on WeeChat buffer
* _date_: date for message (0 means current date/time)
* _tags_: comma separated list of tags (NULL means no tags)
* _message_: message to display

See the link:weechat_user.en.html#lines_tags[WeeChat user's guide / Lines tags]
for a list of commonly used tags in WeeChat.

C example:

[source,C]
----
weechat_printf_date_tags (NULL, time (NULL) - 120, "notify_message",
                          "Message 2 minutes ago, with a tag 'notify_message'");
----

Script (Python):

[source,python]
----
# prototype
weechat.prnt_date_tags(buffer, date, tags, message)

# example
time = int(time.time())
weechat.prnt_date_tags("", time - 120, "notify_message",
    "Message 2 minutes ago, with a tag 'notify_message'")
----

[NOTE]
Function is called "print_date_tags" in scripts ("prnt_date_tags" in Python).

==== printf_y

Display a message on a line of a buffer with free content.

Prototype:

[source,C]
----
void weechat_printf_y (struct t_gui_buffer *buffer, int y,
                       const char *message, ...);
----

Arguments:

* _buffer_: buffer pointer
* _y_: line number (first line is 0); a negative value adds a line after last
  line displayed: absolute value of _y_ is the number of lines after last line
  (for example -1 is immediately after last line, -2 is 2 lines after last line)
  _(WeeChat ≥ 1.0)_
* _message_: message to display

C example:

[source,C]
----
weechat_printf_y (buffer, 2, "My message on third line");
----

Script (Python):

[source,python]
----
# prototype
weechat.prnt_y(buffer, y, message)

# example
weechat.prnt_y("", 2, "My message on third line")
----

[NOTE]
Function is called "print_y" in scripts ("prnt_y" in Python).

==== log_printf

Write a message in WeeChat log file (weechat.log).

Prototype:

[source,C]
----
void weechat_log_printf (const char *message, ...);
----

Arguments:

* _message_: message to write

C example:

[source,C]
----
weechat_log_printf ("My message in log file");
----

Script (Python):

[source,python]
----
# prototype
weechat.log_print(message)

# example
weechat.log_print("My message in log file")
----

[NOTE]
Function is called "log_print" in scripts.

[[hooks]]
=== Hooks

[[hook_priority]]
[float]
==== Hook priority

_WeeChat ≥ 0.3.4._

In some hooks, you can set a priority. A hook with higher priority is at the
beginning of hooks list, so it will be found and executed before other hooks.
It's useful for modifiers, because execution order is important.

To set a priority, you must use this syntax, for argument where priority is
allowed: "nnn|name" where "nnn" is non-negative integer with priority and "name"
the name for argument (priority does not appear in name, it is automatically
removed from string).

Default priority is 1000.

C example:

[source,C]
----
/* hook modifier with priority = 2000 */
weechat_hook_modifier ("2000|input_text_display", &modifier_cb, NULL, NULL);
----

Following hook types allow priority: command, command_run, signal, hsignal,
config, completion, modifier, info, info_hashtable, infolist, hdata, focus.

==== hook_command

_Updated in 1.5, 1.7._

Hook a command.

Prototype:

[source,C]
----
struct t_hook *weechat_hook_command (const char *command,
                                     const char *description,
                                     const char *args,
                                     const char *args_description,
                                     const char *completion,
                                     int (*callback)(const void *pointer,
                                                     void *data,
                                                     struct t_gui_buffer *buffer,
                                                     int argc,
                                                     char **argv,
                                                     char **argv_eol),
                                     const void *callback_pointer,
                                     void *callback_data);
----

Arguments:

* _command_: command name
  (priority allowed, see note about <<hook_priority,priority>>)
* _description_: description for command (displayed with `/help command`)
* _args_: arguments for command (displayed with `/help command`)
* _args_description_: description of arguments (displayed with `/help command`)
* _completion_: completion template for command (see format below)
* _callback_: function called when command is used, arguments and return value:
** _const void *pointer_: pointer
** _void *data_: pointer
** _struct t_gui_buffer *buffer_: buffer where command is executed
** _int argc_: number of arguments given for command
** _char **argv_: arguments given for command
** _char **argv_eol_: arguments given for command (until end of line for each
   argument)
** return value:
*** _WEECHAT_RC_OK_
*** _WEECHAT_RC_ERROR_
* _callback_pointer_: pointer given to callback when it is called by WeeChat
* _callback_data_: pointer given to callback when it is called by WeeChat;
  if not NULL, it must have been allocated with malloc (or similar function)
  and it is automatically freed when the hook is deleted

The _completion_ template is a list of completions for each argument, separated
by spaces. Many completions are possible for one argument, separated by `+|+`.
Many templates are possible for same command, separated by `+||+`.

The format of a completion can be:

* _%(name)_: the completion _name_
* _%(name:arguments)_: the completion _name_ with _arguments_ sent to the
  callback _(WeeChat ≥ 1.7)_
* any string: it is used as-is in completion

For example the template `list || add %(filters_names) || del %(filters_names)|-all`
will complete with following values in command arguments:

* first argument: `list`, `add` and `del`
* second argument, depending on first argument:
** `list`: nothing
** `add`: names of filters
** `del`: names of filters and `-all`

Default completion codes are:

include::autogen/plugin_api/completions.adoc[]

Special codes:

* `+%%command+`: reuse completion template from command _command_
* `+%-+`: stop completion
* `+%*+`: repeat last completion

Return value:

* pointer to new hook, NULL if error occurred

C example:

[source,C]
----
int
my_command_cb (const void *pointer, void *data, struct t_gui_buffer *buffer,
               int argc, char **argv, char **argv_eol)
{
    /* ... */
    return WEECHAT_RC_OK;
}

/* this example is inspired by command /filter */
struct t_hook *my_command_hook =
    weechat_hook_command ("myfilter",
                          "description of myfilter",
                          "[list] | [enable|disable|toggle [name]] | "
                          "[add name plugin.buffer tags regex] | "
                          "[del name|-all]",
                          "description of arguments...",
                          "list"
                          " || enable %(filters_names)"
                          " || disable %(filters_names)"
                          " || toggle %(filters_names)"
                          " || add %(filters_names) %(buffers_plugins_names)|*"
                          " || del %(filters_names)|-all",
                          &my_command_cb, NULL, NULL);
----

For example, if command called is `/command abc def ghi`, then _argv_ and
_argv_eol_ have following values:

* _argv_:
** _argv[0]_ == "/command"
** _argv[1]_ == "abc"
** _argv[2]_ == "def"
** _argv[3]_ == "ghi"
* _argv_eol_:
** _argv_eol[0]_ == "/command abc def ghi"
** _argv_eol[1]_ == "abc def ghi"
** _argv_eol[2]_ == "def ghi"
** _argv_eol[3]_ == "ghi"

For scripts, _args_ has value "abc def ghi".

Script (Python):

[source,python]
----
# prototype
hook = weechat.hook_command(command, description, args, args_description,
    completion, callback, callback_data)

# example
def my_command_cb(data, buffer, args):
    # ...
    return weechat.WEECHAT_RC_OK

hook = weechat.hook_command("myfilter", "description of myfilter",
    "[list] | [enable|disable|toggle [name]] | [add name plugin.buffer tags regex] | [del name|-all]",
    "description of arguments...",
    "list"
    " || enable %(filters_names)"
    " || disable %(filters_names)"
    " || toggle %(filters_names)"
    " || add %(filters_names) %(buffers_plugins_names)|*"
    " || del %(filters_names)|-all",
    "my_command_cb", "")
----

==== hook_completion

_Updated in 1.5, 1.7._

Hook a completion.

Prototype:

[source,C]
----
struct t_hook *weechat_hook_completion (const char *completion_item,
                                        const char *description,
                                        int (*callback)(const void *pointer,
                                                        void *data,
                                                        const char *completion_item,
                                                        struct t_gui_buffer *buffer,
                                                        struct t_gui_completion *completion),
                                        const void *callback_pointer,
                                        void *callback_data);
----

Arguments:

* _completion_item_: name of completion item, after you can use _%(name)_
  (or _%(name:arguments)_ with WeeChat ≥ 1.7) in a command hooked
  (argument _completion_)
  (priority allowed, see note about <<hook_priority,priority>>)
* _description_: description of completion
* _callback_: function called when completion item is used (user is completing
  something using this item), arguments and return value:
** _const void *pointer_: pointer
** _void *data_: pointer
** _const char *completion_item_: name of completion item (with WeeChat ≥ 1.7 it
   can include arguments, with the format: _name:arguments_)
** _struct t_gui_buffer *buffer_: buffer where completion is made
** _struct t_gui_completion *completion_: structure used to add words for
   completion (see
   <<_hook_completion_list_add,hook_completion_list_add>>)
** return value:
*** _WEECHAT_RC_OK_
*** _WEECHAT_RC_ERROR_
* _callback_pointer_: pointer given to callback when it is called by WeeChat
* _callback_data_: pointer given to callback when it is called by WeeChat;
  if not NULL, it must have been allocated with malloc (or similar function)
  and it is automatically freed when the hook is deleted

[NOTE]
Completion names are global (shared across WeeChat and plugins). So it is
recommended to choose a name with a unique prefix, like "plugin_xxx" (where
"xxx" is your item name).

[IMPORTANT]
The callback must only call function <<_hook_completion_list_add,hook_completion_list_add>>
and must *NOT* update the command line. +
To update the command line when kbd:[Tab] is pressed, you can use the function
<<_hook_command_run,hook_command_run>> with command: `/input complete_next`
(and you must return _WEECHAT_RC_OK_EAT_ if your callback has updated the command line,
so that WeeChat will not perform the completion).

Return value:

* pointer to new hook, NULL if error occurred

C example:

[source,C]
----
int
my_completion_cb (const void *pointer, void *data, const char *completion_item,
                  struct t_gui_buffer *buffer,
                  struct t_gui_completion *completion)
{
    weechat_hook_completion_list_add (completion, "word1",
                                      0, WEECHAT_LIST_POS_SORT);
    weechat_hook_completion_list_add (completion, "test_word2",
                                      0, WEECHAT_LIST_POS_SORT);
    return WEECHAT_RC_OK;
}

struct t_hook *my_completion_hook = weechat_hook_completion ("plugin_item",
                                                             "my custom completion!",
                                                             &my_completion_cb, NULL, NULL);
----

Script (Python):

[source,python]
----
# prototype
hook = weechat.hook_completion(completion_item, description, callback, callback_data)

# example
def my_completion_cb(data, completion_item, buffer, completion):
    weechat.hook_completion_list_add(completion, "word1", 0, weechat.WEECHAT_LIST_POS_SORT)
    weechat.hook_completion_list_add(completion, "test_word2", 0, weechat.WEECHAT_LIST_POS_SORT)
    return weechat.WEECHAT_RC_OK

hook = weechat.hook_completion("plugin_item", "my custom completion!",
                               "my_completion_cb", "")
----

==== hook_completion_get_string

_WeeChat ≥ 0.3.4._

Get a completion property as string.

Prototype:

[source,C]
----
const char *weechat_hook_completion_get_string (struct t_gui_completion *completion,
                                                const char *property);
----

Arguments:

* _completion_: completion pointer
* _property_: property name:
** _base_command_: command used for completion
** _base_word_: word being completed
** _args_: command arguments (including base word)

C example:

[source,C]
----
int
my_completion_cb (const void *pointer, void *data, const char *completion_item,
                  struct t_gui_buffer *buffer,
                  struct t_gui_completion *completion)
{
    /* get arguments of command */
    const char *args = weechat_hook_completion_get_string (completion, "args");

    /* completion depending on args */
    /* ... */

    return WEECHAT_RC_OK;
}
----

Script (Python):

[source,python]
----
# prototype
value = weechat.hook_completion_get_string(completion, property)

# example
def my_completion_cb(data, completion_item, buffer, completion):
    # get arguments of command
    args = weechat.hook_completion_get_string(completion, "args")
    # completion depending on args
    # ...
    return weechat.WEECHAT_RC_OK
----

==== hook_completion_list_add

Add a word for a completion.

Prototype:

[source,C]
----
void weechat_hook_completion_list_add (struct t_gui_completion *completion,
                                       const char *word,
                                       int nick_completion,
                                       const char *where);
----

Arguments:

* _completion_: completion pointer
* _word_: word to add
* _nick_completion_: 1 if word is a nick, otherwise 0
* _where_: position where word will be inserted in list:
** _WEECHAT_LIST_POS_SORT_: any position, to keep list sorted
** _WEECHAT_LIST_POS_BEGINNING_: beginning of list
** _WEECHAT_LIST_POS_END_: end of list

C example: see <<_hook_completion,hook_completion>>.

Script (Python):

[source,python]
----
# prototype
weechat.hook_completion_list_add(completion, word, nick_completion, where)

# example: see function hook_completion above
----

==== hook_command_run

_Updated in 1.5._

Hook a command when WeeChat runs it.

Prototype:

[source,C]
----
struct t_hook *weechat_hook_command_run (const char *command,
                                         int (*callback)(const void *pointer,
                                                         void *data,
                                                         struct t_gui_buffer *buffer,
                                                         const char *command),
                                         const void *callback_pointer,
                                         void *callback_data);
----

Arguments:

* _command_: command to hook (wildcard `+*+` is allowed)
  (priority allowed, see note about <<hook_priority,priority>>)
* _callback_: function called when command is run, arguments and return value:
** _const void *pointer_: pointer
** _void *data_: pointer
** _struct t_gui_buffer *buffer_: buffer where command is executed
** _const char *command_: the command executed, with its arguments
** return value:
*** _WEECHAT_RC_OK_
*** _WEECHAT_RC_OK_EAT_: command will not be executed by WeeChat after callback
*** _WEECHAT_RC_ERROR_
* _callback_pointer_: pointer given to callback when it is called by WeeChat
* _callback_data_: pointer given to callback when it is called by WeeChat;
  if not NULL, it must have been allocated with malloc (or similar function)
  and it is automatically freed when the hook is deleted

Return value:

* pointer to new hook, NULL if error occurred

C example:

[source,C]
----
int
my_command_run_cb (const void *pointer, void *data,
                   struct t_gui_buffer *buffer, const char *command)
{
    weechat_printf (NULL, "I'm eating the completion!");
    return WEECHAT_RC_OK_EAT;
}

struct t_hook *my_command_run_hook =
    weechat_hook_command_run ("/input complete*",
                              &my_command_run_cb, NULL, NULL);
----

Script (Python):

[source,python]
----
# prototype
hook = weechat.hook_command_run(command, callback, callback_data)

# example
def my_command_run_cb(data, buffer, command):
    weechat.prnt("", "I'm eating the completion!")
    return weechat.WEECHAT_RC_OK_EAT

hook = weechat.hook_command_run("/input complete*", "my_command_run_cb", "")
----

==== hook_timer

_Updated in 1.5._

Hook a timer.

Prototype:

[source,C]
----
struct t_hook *weechat_hook_timer (long interval,
                                   int align_second,
                                   int max_calls,
                                   int (*callback)(const void *pointer,
                                                   void *data,
                                                   int remaining_calls),
                                   const void *callback_pointer,
                                   void *callback_data);
----

Arguments:

* _interval_: interval between two calls (milliseconds, so 1000 = 1 second)
* _align_second_: alignment on a second. For example, if current time is 09:00,
  if interval = 60000 (60 seconds), and align_second = 60, then timer is
  called each minute when second is 0
* _max_calls_: number of calls to timer (if 0, then timer has no end)
* _callback_: function called when time is reached, arguments and return value:
** _const void *pointer_: pointer
** _void *data_: pointer
** _int remaining_calls_: remaining calls (-1 if timer has no end)
** return value:
*** _WEECHAT_RC_OK_
*** _WEECHAT_RC_ERROR_
* _callback_pointer_: pointer given to callback when it is called by WeeChat
* _callback_data_: pointer given to callback when it is called by WeeChat;
  if not NULL, it must have been allocated with malloc (or similar function)
  and it is automatically freed when the hook is deleted

Return value:

* pointer to new hook, NULL if error occurred

C example:

[source,C]
----
int
my_timer_cb (const void *pointer, void *data, int remaining_calls)
{
    /* ... */
    return WEECHAT_RC_OK;
}

/* timer called each 20 seconds */
struct t_hook *my_timer_hook =
    weechat_hook_timer (20 * 1000, 0, 0, &my_timer_cb, NULL, NULL);
----

Script (Python):

[source,python]
----
# prototype
hook = weechat.hook_timer(interval, align_second, max_calls, callback, callback_data)

# example
def my_timer_cb(data, remaining_calls):
    # ...
    return weechat.WEECHAT_RC_OK

# timer called each 20 seconds
hook = weechat.hook_timer(20 * 1000, 0, 0, "my_timer_cb", "")
----

==== hook_fd

_Updated in 1.3, 1.5, 2.0._

Hook a file descriptor (file or socket).

Prototype:

[source,C]
----
struct t_hook *weechat_hook_fd (int fd,
                                int flag_read,
                                int flag_write,
                                int flag_exception,
                                int (*callback)(const void *pointer,
                                                void *data,
                                                int fd),
                                const void *callback_pointer,
                                void *callback_data);
----

Arguments:

* _fd_: file descriptor
* _flag_read_: 1 = catch read event, 0 = ignore
* _flag_write_: 1 = catch write event, 0 = ignore
* _flag_exception_: 1 = catch exception event, 0 = ignore
  (_WeeChat ≥ 1.3_: this argument is ignored and not used any more)
* _callback_: function called a selected event occurs for file (or socket),
  arguments and return value:
** _const void *pointer_: pointer
** _void *data_: pointer
** _int fd_: file descriptor
** return value:
*** _WEECHAT_RC_OK_
*** _WEECHAT_RC_ERROR_
* _callback_pointer_: pointer given to callback when it is called by WeeChat
* _callback_data_: pointer given to callback when it is called by WeeChat;
  if not NULL, it must have been allocated with malloc (or similar function)
  and it is automatically freed when the hook is deleted

Return value:

* pointer to new hook, NULL if error occurred

[IMPORTANT]
In scripts, with WeeChat ≥ 2.0, the callback argument _fd_ is an integer
(with WeeChat ≤ 1.9, it was a string). +
To be compatible with all versions, it is recommended to convert the argument
to integer before using it, for example in Python: `int(fd)`.

C example:

[source,C]
----
int
my_fd_cb (const void *pointer, void *data, int fd)
{
    /* ... */
    return WEECHAT_RC_OK;
}

int sock = socket (AF_INET, SOCK_STREAM, 0);
/* set socket options */
/* ... */
struct t_hook *my_fd_hook = weechat_hook_fd (sock, 1, 0, 0, &my_fd_cb, NULL, NULL);
----

Script (Python):

[source,python]
----
# prototype
hook = weechat.hook_fd(fd, flag_read, flag_write, flag_exception, callback, callback_data)

# example
def my_fd_cb(data, fd):
    # ...
    return weechat.WEECHAT_RC_OK

sock = ...
hook = weechat.hook_fd(sock, 1, 0, 0, "my_fd_cb", "")
----

==== hook_process

_Updated in 1.5._

Hook a process (launched with fork), and catch output.

[NOTE]
Since version 0.3.9.2, the shell is not used any more to execute the command.
WeeChat makes an automatic split of the command and its arguments (like the
shell does). +
If the split is not correct (according to quotes in your command), or if you
want to use shell, you can use function
<<_hook_process_hashtable,hook_process_hashtable>> with arguments in the hashtable
_options_ _(WeeChat ≥ 0.4.0)_.

Prototype:

[source,C]
----
struct t_hook *weechat_hook_process (const char *command,
                                     int timeout,
                                     int (*callback)(const void *pointer,
                                                     void *data,
                                                     const char *command,
                                                     int return_code,
                                                     const char *out,
                                                     const char *err),
                                     const void *callback_pointer,
                                     void *callback_data);
----


Arguments:

* _command_: command to launch in child process, URL _(WeeChat ≥ 0.3.7)_ or
  function _(WeeChat ≥ 1.5)_ (see below)
* _timeout_: timeout for command (in milliseconds): after this timeout, child
  process is killed (0 means no timeout)
* _callback_: function called when data from child is available, or when child
  has ended, arguments and return value:
** _const void *pointer_: pointer
** _void *data_: pointer
** _const char *command_: command executed by child
** _int return_code_: return code:
*** _>= 0_: child return code for a command, and for URL possible values are:
**** _0_: transfer OK
**** _1_: invalid URL
**** _2_: transfer error
**** _3_: not enough memory
**** _4_: error with a file
*** _< 0_:
**** _WEECHAT_HOOK_PROCESS_RUNNING_: data available, but child still running)
**** _WEECHAT_HOOK_PROCESS_ERROR_: error when launching command
**** _WEECHAT_HOOK_PROCESS_CHILD_: callback is called in the child process
** _out_: standard output of command (stdout)
** _err_: error output of command (stderr)
** return value:
*** _WEECHAT_RC_OK_
*** _WEECHAT_RC_ERROR_
*** child process return code (in case of function with "func:" in command)
* _callback_pointer_: pointer given to callback when it is called by WeeChat
* _callback_data_: pointer given to callback when it is called by WeeChat;
  if not NULL, it must have been allocated with malloc (or similar function)
  and it is automatically freed when the hook is deleted

Return value:

* pointer to new hook, NULL if error occurred

When command has ended, or if timeout is reached, WeeChat will automatically
unhook (and kill process if it is still running).

The command can be an URL with format: "url:https://www.example.com",
to download content of URL _(WeeChat ≥ 0.3.7)_. Options are possible for URL
with function <<_hook_process_hashtable,hook_process_hashtable>>.

The command can also be a function name with format: "func:name", to execute
the function "name" _(WeeChat ≥ 1.5)_. This function receives a single argument
(_data_) and must return a string, which is sent to the callback. +
In C API, the callback is called with the return code set to
_WEECHAT_HOOK_PROCESS_CHILD_, which means the callback is running in the child
process (after fork). +
In scripting API, the function _name_ is called directly and its result
(string) is sent to the callback (like the output of an external command).

[TIP]
If you want to retrieve infos about WeeChat (like current stable version,
latest git commit, etc.), you can use URLs on page https://weechat.org/dev/info

[NOTE]
Buffer size for sending data to callback is 64KB (there are 2 buffers: one for
stdout and one for stderr).
If output from child process (stdout or stderr) is longer than 64KB, callback
will be called more than one time.

[IMPORTANT]
Even if most of times your callback is called only once, you must ensure that
many calls to callback are OK in your code: you must concatenate data issued by
many calls and use data only when return code is non-negative.

C example:

[source,C]
----
/* example with an external command */
int
my_process_cb (const void *pointer, void *data, const char *command,
               int return_code, const char *out, const char *err)
{
    if (return_code == WEECHAT_HOOK_PROCESS_ERROR)
    {
        weechat_printf (NULL, "Error with command '%s'", command);
        return WEECHAT_RC_OK;
    }

    if (return_code >= 0)
    {
        weechat_printf (NULL, "return_code = %d", return_code);
    }

    if (out)
    {
        weechat_printf (NULL, "stdout: %s", out);
    }

    if (err)
    {
        weechat_printf (NULL, "stderr: %s", err);
    }

    return WEECHAT_RC_OK;
}

struct t_hook *my_process_hook = weechat_hook_process ("ls", 5000,
                                                       &my_process_cb, NULL, NULL);

/* example with the callback called in the child process */
int
my_process_func_cb (const void *pointer, void *data, const char *command,
                    int return_code, const char *out, const char *err)
{
    if (return_code == WEECHAT_HOOK_PROCESS_CHILD)
    {
        /* do something blocking... */
        /* ... */

        /* the stdout will be sent as "out" in the parent callback */
        printf ("this is the result");

        /* return code of the process */
        return 0;
    }
    else
    {
        if (return_code == WEECHAT_HOOK_PROCESS_ERROR)
        {
            weechat_printf (NULL, "Error with command '%s'", command);
            return WEECHAT_RC_OK;
        }

        if (return_code >= 0)
        {
            weechat_printf (NULL, "return_code = %d", return_code);
        }

        if (out)
        {
            weechat_printf (NULL, "stdout: %s", out);
        }

        if (err)
        {
            weechat_printf (NULL, "stderr: %s", err);
        }

        return WEECHAT_RC_OK;
    }
}

struct t_hook *my_process_hook = weechat_hook_process ("func:get_status", 5000,
                                                       &my_process_func_cb, NULL, NULL);
----

Script (Python):

[source,python]
----
# prototype
hook = weechat.hook_process(command, timeout, callback, callback_data)

# example with an external command
def my_process_cb(data, command, return_code, out, err):
    if return_code == weechat.WEECHAT_HOOK_PROCESS_ERROR:
        weechat.prnt("", "Error with command '%s'" % command)
        return weechat.WEECHAT_RC_OK
    if return_code >= 0:
        weechat.prnt("", "return_code = %d" % return_code)
    if out != "":
        weechat.prnt("", "stdout: %s" % out)
    if err != "":
        weechat.prnt("", "stderr: %s" % err)
    return weechat.WEECHAT_RC_OK

hook = weechat.hook_process("ls", 5000, "my_process_cb", "")

# example with a script function
def get_status(data):
    # do something blocking...
    # ...
    return "this is the result"

def my_process_cb(data, command, return_code, out, err):
    if return_code == weechat.WEECHAT_HOOK_PROCESS_ERROR:
        weechat.prnt("", "Error with command '%s'" % command)
        return weechat.WEECHAT_RC_OK
    if return_code >= 0:
        weechat.prnt("", "return_code = %d" % return_code)
    if out != "":
        weechat.prnt("", "stdout: %s" % out)
    if err != "":
        weechat.prnt("", "stderr: %s" % err)
    return weechat.WEECHAT_RC_OK

hook = weechat.hook_process("func:get_status", 5000, "my_process_cb", "")
----

==== hook_process_hashtable

_WeeChat ≥ 0.3.7, updated in 1.5._

Hook a process (launched with fork) using options in a hashtable, and catch
output.

Prototype:

[source,C]
----
struct t_hook *weechat_hook_process_hashtable (const char *command,
                                               struct t_hashtable *options,
                                               int timeout,
                                               int (*callback)(const void *pointer,
                                                               void *data,
                                                               const char *command,
                                                               int return_code,
                                                               const char *out,
                                                               const char *err),
                                               const void *callback_pointer,
                                               void *callback_data);
----

Arguments are the same as function <<_hook_process,hook_process>>, with an extra argument:

* _options_: options for command executed; the hashtable is duplicated in
  function, so it's safe to free it after this call

For a standard command (not beginning with "url:"), following options are
available:

[width="100%",cols="^1,1,1,4",options="header"]
|===
| Option | Value | Default | Description

| argN (N ≥ 1) +
  _(WeeChat ≥ 0.4.0)_ |
  any string |
  no arguments |
  Arguments for command; if no argument is given with these options,
  the command is automatically split like the shell does (and then command
  arguments are read in the _command_ argument).

| stdin +
  _(WeeChat ≥ 0.4.3)_ |
  (not used) |
  no stdin |
  Create a pipe for writing data on standard input (stdin) of child process
  (see function <<_hook_set,hook_set>>).

| buffer_flush +
  _(WeeChat ≥ 1.0)_ |
  number of bytes |
  65536 |
  Minimum number of bytes to flush stdout/stderr (to send output to callback),
  between 1 and 65536. With the value 1, the output is sent immediately to the
  callback.

| detached +
  _(WeeChat ≥ 1.0)_ |
  (not used) |
  not detached |
  Run the process in a detached mode: stdout and stderr are redirected to
  _/dev/null_.
|===

For command "url:...", following options are available (see
`man curl_easy_setopt` for a description of each option):

include::autogen/plugin_api/url_options.adoc[]

[NOTE]
^(1)^ For options with type "mask", format is: "value1+value2+value3";
for options with type "list", the list items must be separated by a newline
(`\n`). +
^(2)^ When constants are available they must be used as value for option.

For URL, two extra options (strings) are allowed for input/output file:

* _file_in_: file to read and send with URLs (post file)
* _file_out_: write downloaded URL/file in this file (instead of standard
  output)

Return value:

* pointer to new hook, NULL if error occurred

C example:

[source,C]
----
int
my_process_cb (const void *pointer, void *data, const char *command,
               int return_code, const char *out, const char *err)
{
    if (return_code == WEECHAT_HOOK_PROCESS_ERROR)
    {
        weechat_printf (NULL, "Error with command '%s'", command);
        return WEECHAT_RC_OK;
    }

    if (return_code >= 0)
    {
        weechat_printf (NULL, "return_code = %d", return_code);
    }

    if (out)
    {
        weechat_printf (NULL, "stdout: %s", out);
    }

    if (err)
    {
        weechat_printf (NULL, "stderr: %s", err);
    }

    return WEECHAT_RC_OK;
}

/* example 1: download URL */
struct t_hashtable *options_url1 = weechat_hashtable_new (8,
                                                          WEECHAT_HASHTABLE_STRING,
                                                          WEECHAT_HASHTABLE_STRING,
                                                          NULL,
                                                          NULL);
if (options_url1)
{
    weechat_hashtable_set (options_url1, "file_out", "/tmp/weechat.org.html");
    struct t_hook *my_process_hook = weechat_hook_process_hashtable ("url:https://weechat.org/",
                                                                     options_url1,
                                                                     20000,
                                                                     &my_process_cb, NULL, NULL);
    weechat_hashtable_free (options_url1);
}

/* example 2: open URL with custom HTTP headers */
struct t_hashtable *options_url2 = weechat_hashtable_new (8,
                                                          WEECHAT_HASHTABLE_STRING,
                                                          WEECHAT_HASHTABLE_STRING,
                                                          NULL,
                                                          NULL);
if (options_url2)
{
    weechat_hashtable_set (options_url2, "httpheader",
                           "Header1: value1\n"
                           "Header2: value2");
    struct t_hook *my_process_hook = weechat_hook_process_hashtable ("url:http://localhost:8080/",
                                                                     options_url2,
                                                                     20000,
                                                                     &my_process_cb, NULL, NULL);
    weechat_hashtable_free (options_url2);
}

/* example 3: execute a notify program with a message from someone */
struct t_hashtable *options_cmd1 = weechat_hashtable_new (8,
                                                          WEECHAT_HASHTABLE_STRING,
                                                          WEECHAT_HASHTABLE_STRING,
                                                          NULL,
                                                          NULL);
if (options_cmd1)
{
    weechat_hashtable_set (options_cmd1, "arg1", "-from");
    weechat_hashtable_set (options_cmd1, "arg2", nick);
    weechat_hashtable_set (options_cmd1, "arg3", "-msg");
    weechat_hashtable_set (options_cmd1, "arg4", message);  /* untrusted argument */
    struct t_hook *my_process_hook = weechat_hook_process_hashtable ("my-notify-command",
                                                                     options_cmd1,
                                                                     20000,
                                                                     &my_process_cb, NULL, NULL);
    weechat_hashtable_free (options_cmd1);
}

/* example 4: call shell to execute a command (command must be SAFE) */
struct t_hashtable *options_cmd2 = weechat_hashtable_new (8,
                                                          WEECHAT_HASHTABLE_STRING,
                                                          WEECHAT_HASHTABLE_STRING,
                                                          NULL,
                                                          NULL);
if (options_cmd2)
{
    weechat_hashtable_set (options_cmd2, "arg1", "-c");
    weechat_hashtable_set (options_cmd2, "arg2", "ls -l /tmp | grep something");
    struct t_hook *my_process_hook = weechat_hook_process_hashtable ("sh",
                                                                     options_cmd2,
                                                                     20000,
                                                                     &my_process_cb, NULL, NULL);
    weechat_hashtable_free (options_cmd2);
}
----

Script (Python):

[source,python]
----
# prototype
hook = weechat.hook_process_hashtable(command, options, timeout, callback, callback_data)

# example
def my_process_cb(data, command, return_code, out, err):
    if return_code == weechat.WEECHAT_HOOK_PROCESS_ERROR:
        weechat.prnt("", "Error with command '%s'" % command)
        return weechat.WEECHAT_RC_OK
    if return_code >= 0:
        weechat.prnt("", "return_code = %d" % return_code)
    if out != "":
        weechat.prnt("", "stdout: %s" % out)
    if err != "":
        weechat.prnt("", "stderr: %s" % err)
    return weechat.WEECHAT_RC_OK

# example 1: download URL
hook1 = weechat.hook_process_hashtable("url:https://weechat.org/",
                                       {"file_out": "/tmp/weechat.org.html"},
                                       20000, "my_process_cb", "")

# example 2: open URL with custom HTTP headers
options = {
    "httpheader": "\n".join([
        "Header1: value1",
        "Header2: value2",
    ]),
}
hook2 = weechat.hook_process_hashtable("url:http://localhost:8080/",
                                       options,
                                       20000, "my_process_cb", "")

# example 3: execute a notify program with a message from someone
hook3 = weechat.hook_process_hashtable("my-notify-command",
                                       {"arg1": "-from",
                                        "arg2": nick,
                                        "arg3": "-msg",
                                        "arg4": message},  # untrusted argument
                                       20000, "my_process_cb", "")

# example 4: call shell to execute a command (command must be SAFE)
hook4 = weechat.hook_process_hashtable("sh",
                                       {"arg1": "-c",
                                        "arg2": "ls -l /tmp | grep something"},
                                       20000, "my_process_cb", "")
----

==== hook_connect

_Updated in 1.5, 2.0._

Hook a connection (background connection to a remote host).

Prototype:

[source,C]
----
struct t_hook *weechat_hook_connect (const char *proxy,
                                     const char *address,
                                     int port,
                                     int ipv6,
                                     int retry,
                                     void *gnutls_sess,
                                     void *gnutls_cb,
                                     int gnutls_dhkey_size,
                                     const char *gnutls_priorities,
                                     const char *local_hostname,
                                     int (*callback)(const void *pointer,
                                                     void *data,
                                                     int status,
                                                     int gnutls_rc,
                                                     int sock,
                                                     const char *error,
                                                     const char *ip_address),
                                     const void *callback_pointer,
                                     void *callback_data);
----

Arguments:

* _proxy_: name of proxy to use for connection (optional, NULL means connection
  without proxy)
* _address_: name or IP address to connect to
* _port_: port number
* _ipv6_: 1 to use IPv6 (with fallback to IPv4), 0 to use only IPv4
* _retry_: retry count, used to fallback to IPv4 hosts if IPv6 hosts connect
  but then fail to accept the client
* _gnutls_sess_: GnuTLS session (optional)
* _gnutls_cb_: GnuTLS callback (optional)
* _gnutls_dhkey_size_: size of the key used during the Diffie-Hellman Key
  Exchange (GnuTLS)
* _gnutls_priorities_: priorities for gnutls (for syntax, see documentation of
  function _gnutls_priority_init_ in gnutls manual), basic values are:
** _PERFORMANCE_
** _NORMAL_ (default)
** _SECURE128_
** _SECURE256_
** _EXPORT_
** _NONE_
* _local_hostname_: local hostname to use for connection (optional)
* _callback_: function called when connection is OK or failed, arguments and
  return value:
** _const void *pointer_: pointer
** _void *data_: pointer
** _int status_: connection status:
*** _WEECHAT_HOOK_CONNECT_OK_: connection OK
*** _WEECHAT_HOOK_CONNECT_ADDRESS_NOT_FOUND_: address not found
*** _WEECHAT_HOOK_CONNECT_IP_ADDRESS_NOT_FOUND_: IP address not found
*** _WEECHAT_HOOK_CONNECT_CONNECTION_REFUSED_: connection refused
*** _WEECHAT_HOOK_CONNECT_PROXY_ERROR_: error with proxy
*** _WEECHAT_HOOK_CONNECT_LOCAL_HOSTNAME_ERROR_: error with local hostname
*** _WEECHAT_HOOK_CONNECT_GNUTLS_INIT_ERROR_: GnuTLS init error
*** _WEECHAT_HOOK_CONNECT_GNUTLS_HANDSHAKE_ERROR_: GnuTLS handshake error
*** _WEECHAT_HOOK_CONNECT_MEMORY_ERROR_: insufficient memory
*** _WEECHAT_HOOK_CONNECT_TIMEOUT_: timeout
*** _WEECHAT_HOOK_CONNECT_SOCKET_ERROR_: unable to create socket
** _gnutls_rc_: return value of _gnutls_handshake()_
** _sock_: socket used to connect
** _const char *error_: return value of _gnutls_strerror(gnutls_rc)_
** _const char *ip_address_: IP address found
** return value:
*** _WEECHAT_RC_OK_
*** _WEECHAT_RC_ERROR_
* _callback_pointer_: pointer given to callback when it is called by WeeChat
* _callback_data_: pointer given to callback when it is called by WeeChat;
  if not NULL, it must have been allocated with malloc (or similar function)
  and it is automatically freed when the hook is deleted

Return value:

* pointer to new hook, NULL if error occurred

[IMPORTANT]
In scripts, with WeeChat ≥ 2.0, the callback arguments _status_, _gnutls_rc_
and _sock_ are integers (with WeeChat ≤ 1.9, they were strings). +
To be compatible with all versions, it is recommended to convert the argument
to integer before using it, for example in Python: `int(sock)`.

C example:

[source,C]
----
int
my_connect_cb (const void *pointer, void *data, int status, int gnutls_rc,
               int sock, const char *error, const char *ip_address)
{
    switch (status)
    {
        case WEECHAT_HOOK_CONNECT_OK:
            /* ... */
            break;
        case WEECHAT_HOOK_CONNECT_ADDRESS_NOT_FOUND:
            /* ... */
            break;
        case WEECHAT_HOOK_CONNECT_IP_ADDRESS_NOT_FOUND:
            /* ... */
            break;
        case WEECHAT_HOOK_CONNECT_CONNECTION_REFUSED:
            /* ... */
            break;
        case WEECHAT_HOOK_CONNECT_PROXY_ERROR:
            /* ... */
            break;
        case WEECHAT_HOOK_CONNECT_LOCAL_HOSTNAME_ERROR:
            /* ... */
            break;
        case WEECHAT_HOOK_CONNECT_GNUTLS_INIT_ERROR:
            /* ... */
            break;
        case WEECHAT_HOOK_CONNECT_GNUTLS_HANDSHAKE_ERROR:
            /* ... */
            break;
        case WEECHAT_HOOK_CONNECT_MEMORY_ERROR:
            /* ... */
            break;
        case WEECHAT_HOOK_CONNECT_TIMEOUT:
            /* ... */
            break;
        case WEECHAT_HOOK_CONNECT_SOCKET_ERROR:
            /* ... */
            break;
    }
    return WEECHAT_RC_OK;
}

struct t_hook *my_connect_hook = weechat_hook_connect (NULL,
                                                       "my.server.org", 1234,
                                                       1, 0,
                                                       NULL, NULL, 0,  /* GnuTLS */
                                                       NULL,
                                                       &my_connect_cb, NULL, NULL);
----

Script (Python):

[source,python]
----
# prototype
hook = weechat.hook_connect(proxy, address, port, ipv6, retry, local_hostname,
    callback, callback_data)

# example
def my_connect_cb(data, status, gnutls_rc, sock, error, ip_address):
    if status == WEECHAT_HOOK_CONNECT_OK:
        # ...
    elif status == WEECHAT_HOOK_CONNECT_ADDRESS_NOT_FOUND:
        # ...
    elif status == WEECHAT_HOOK_CONNECT_IP_ADDRESS_NOT_FOUND:
        # ...
    elif status == WEECHAT_HOOK_CONNECT_CONNECTION_REFUSED:
        # ...
    elif status == WEECHAT_HOOK_CONNECT_PROXY_ERROR:
        # ...
    elif status == WEECHAT_HOOK_CONNECT_LOCAL_HOSTNAME_ERROR:
        # ...
    elif status == WEECHAT_HOOK_CONNECT_GNUTLS_INIT_ERROR:
        # ...
    elif status == WEECHAT_HOOK_CONNECT_GNUTLS_HANDSHAKE_ERROR:
        # ...
    elif status == WEECHAT_HOOK_CONNECT_MEMORY_ERROR:
        # ...
    elif status == WEECHAT_HOOK_CONNECT_TIMEOUT:
        # ...
    elif status == WEECHAT_HOOK_CONNECT_SOCKET_ERROR:
        # ...
    return weechat.WEECHAT_RC_OK

hook = weechat.hook_connect("", "my.server.org", 1234, 1, 0, "",
                            "my_connect_cb", "")
----

==== hook_line

_WeeChat ≥ 2.3._

Hook a line to be printed in a buffer.

When a line is printed in a buffer, hooks are called in this order:

* <<_hook_line,hook line>> (this hook): it can change the buffer, prefix,
  message, tags, notify level, … (see below)
* <<_hook_modifier,hook modifier>> "<<hook_modifier_weechat_print,weechat_print>>":
  it can change the prefix and message on a buffer with formatted content
* <<_hook_print,hook print>>: called when the line has been added in a buffer
  with formatted content (nothing can be changed directly with this hook).

[NOTE]
The "line" hook is the only one among these three hooks that can work on
buffers with free content.

Prototype:

[source,C]
----
struct t_hook *weechat_hook_line (const char *buffer_type,
                                  const char *buffer_name,
                                  const char *tags,
                                  struct t_hashtable *(*callback)(const void *pointer,
                                                                  void *data,
                                                                  struct t_hashtable *line),
                                  const void *callback_pointer,
                                  void *callback_data);
----

Arguments:

* _buffer_type_: catch lines on the given buffer type (if NULL or empty string,
  _formatted_ is the default):
** _formatted_: catch lines on formatted buffers only (default)
** _free_: catch lines on buffers with free content only
** _*_: catch lines on all buffer types
* _buffer_name_: comma-separated list of buffer masks
  (see <<_buffer_match_list,buffer_match_list>>); NULL, empty string or "*"
  matches any buffer
* _tags_: catch only messages with these tags (optional): comma-separated list
   of tags that must be in message (logical "or"); it is possible to combine
   many tags as a logical "and" with separator `+++`; wildcard `+*+` is allowed
   in tags
* _callback_: function called when a line is added in a buffer, arguments and
  return value:
** _const void *pointer_: pointer
** _void *data_: pointer
** _struct t_hashtable *line_: hashtable with the line info, keys and values are
   strings (see table below)
** return value: hashtable with new values (see table below)
* _callback_pointer_: pointer given to callback when it is called by WeeChat
* _callback_data_: pointer given to callback when it is called by WeeChat;
  if not NULL, it must have been allocated with malloc (or similar function)
  and it is automatically freed when the hook is deleted

Return value:

* pointer to new hook, NULL if error occurred

Line data sent to the callback is a hashtable, with following values
(keys and values are strings):

[width="100%",cols="^1,3,3,2",options="header"]
|===
| Key | Value (formatted buffer) | Value (free buffer) | Examples

| buffer |
  Buffer pointer. |
  Buffer pointer. |
  `+0x12345678+`

| buffer_name |
  Buffer name. |
  Buffer name. |
  `+core.weechat+` +
  `+irc.server.freenode+` +
  `+irc.freenode.#weechat+`

| buffer_type |
  "formatted" |
  "free" |
  `+formatted+` +
  `+free+`

| y |
  N/A ("-1"). |
  Line number (≥ "0"). |
  `+-1+` +
  `+8+`

| date |
  Line date (timestamp). |
  N/A ("0"). |
  `+1533792000+`

| date_printed |
  Date when line was displayed (timestamp). |
  N/A ("0"). |
  `+1533792012+`

| str_time |
  Date for display (possible color codes inside). |
  N/A (empty string). |
  `+09:07:20+`

| tags_count |
  Number of tags in the line (≥ "0"). |
  N/A ("0"). |
  `+2+`

| tags |
  Comma-separated list of tags. |
  N/A (empty string). |
  `+irc_join,nick_test+`

| displayed |
  "0" = line is filtered (hidden) +
  "1" = line is not filtered (displayed). |
  "0" = line is filtered (hidden) +
  "1" = line is not filtered (displayed). |
  `+0+` +
  `+1+`

| notify_level |
  "-1" = no notify +
  "0" = low level +
  "1" = message +
  "2" = private message +
  "3" = highlight |
  N/A ("0"). |
  `+2+`

| highlight |
  "0" = no highlight +
  "1" = line has highlight. |
  N/A ("0"). |
  `+0+` +
  `+1+`

| prefix |
  Prefix of the line. |
  N/A (empty string). |
  `+-->+`

| message |
  Message of the line. |
  Message of the line. |
  `+test (~test@example.com) has joined #channel+`
|===

The callback can return a hashtable with some fields to update the line.
Any invalid value in a field is silently ignored by WeeChat.

The following keys can be set in the hashtable (keys and values are strings
in this hashtable):

[width="100%",cols="^1,2,2,5",options="header"]
|===
| Key | Allowed value (formatted buffer) | Allowed value (free buffer) | Result

| buffer |
  Pointer of a buffer with formatted content. |
  Pointer of a buffer with free content. |
  The line is displayed on this buffer. +
  If the value is empty, the line is deleted (anything else in the hashtable
  is then ignored); the next hooks of type "line" are not called.

| buffer_name |
  Name of a buffer with formatted content. |
  Name of a buffer with free content. |
  The line is displayed on this buffer. +
  If `buffer` is also set, the value of `buffer_name` has higher priority and is used. +
  If the value is empty, the line is deleted (anything else in the hashtable
  is then ignored); the next hooks of type "line" are not called.

| y |
  N/A. |
  Integer (≥ "0"). |
  The line number is set to this value.

| date |
  Timestamp. |
  N/A. |
  The date is set to this value. +
  The value of `str_time` is updated accordingly.

| date_printed |
  Timestamp. |
  N/A. |
  The printed date is set to this timestamp (not displayed).

| str_time |
  String. |
  N/A. |
  This string is used to display the date line. +
  If `date` is also set, the value of `str_time` has higher priority and is used.

| tags |
  String. |
  N/A. |
  The line tags are replaced with this comma-separated list of tags. +
  The values of `notify_level` and `highlight` are updated accordingly.

| notify_level |
  Integer ("-1" to "3"). |
  N/A. |
  The notify level is set to this value. The hotlist will be updated
  accordingly once the line is added in the buffer. +
  The value of `highlight` is updated accordingly. +
  If `tags` is also set, the value of `notify_level` has higher priority and is used.

| highlight |
  Integer ("0" or "1"). |
  N/A. |
  "0" disables highlight on the line, "1" forces a highlight on the line. +
  If `tags` or `notify_level` are set, the value of `highlight` has higher
  priority and is used.

| prefix |
  String. |
  N/A. |
  The line prefix is set to this value.

| message |
  String. |
  String. |
  The line message is set to this value.
|===

C example:

[source,C]
----
int
my_line_cb (const void *pointer, void *data, struct t_hasbtable *line)
{
    struct t_hashtable *hashtable;

    hashtable = weechat_hashtable_new (8,
                                       WEECHAT_HASHTABLE_STRING,
                                       WEECHAT_HASHTABLE_STRING,
                                       NULL,
                                       NULL);
    /* force a highlight on the line */
    weechat_hashtable_set (hashtable, "highlight", "1");
    return hashtable;
}

/* catch lines with tag "irc_join" */
struct t_hook *my_line_hook =
    weechat_hook_line ("", "", "irc_join", &my_line_cb, NULL, NULL);
----

Script (Python):

[source,python]
----
# prototype
hook = weechat.hook_line(buffer_type, buffer_name, tags, callback, callback_data)

# example
def my_line_cb(data, line):
    # force a highlight on the line
    return {"highlight": "1"}

# catch lines with tag "irc_join"
hook = weechat.hook_line("", "", "irc_join", "my_line_cb", "")
----

==== hook_print

_Updated in 0.4.3, 1.0, 1.5._

Hook a message printed. It is called when a line has been added in a buffer
with formatted content.

For more information on the hooks called when a line is printed, see
<<_hook_line,hook_line>>.

Prototype:

[source,C]
----
struct t_hook *weechat_hook_print (struct t_gui_buffer *buffer,
                                   const char *tags,
                                   const char *message,
                                   int strip_colors,
                                   int (*callback)(const void *pointer,
                                                   void *data,
                                                   struct t_gui_buffer *buffer,
                                                   time_t date,
                                                   int tags_count,
                                                   const char **tags,
                                                   int displayed,
                                                   int highlight,
                                                   const char *prefix,
                                                   const char *message),
                                   const void *callback_pointer,
                                   void *callback_data);
----

Arguments:

* _buffer_: buffer pointer, if NULL, messages from any buffer are caught
* _tags_: catch only messages with these tags (optional):
** with WeeChat ≥ 0.4.3: comma-separated list of tags that must be in message
   (logical "or"); it is possible to combine many tags as a logical "and" with
   separator `+++`; wildcard `+*+` is allowed in tags
** with WeeChat ≤ 0.4.2: comma-separated list of tags that must all be in
   message (logical "and")
* _message_: only messages with this string will be caught (optional, case
  insensitive)
* _strip_colors_: if 1, colors will be stripped from message displayed, before
  calling callback
* _callback_: function called when a message is printed, arguments and return
  value:
** _const void *pointer_: pointer
** _void *data_: pointer
** _struct t_gui_buffer *buffer_: buffer pointer
** _time_t date_: date
** _int tags_count_: number of tags for line
** _const char **tags_: array with tags for line
** _int displayed_: 1 if line is displayed, 0 if it is filtered (hidden)
** _int highlight_: 1 if line has highlight, otherwise 0
** _const char *prefix_: prefix
** _const char *message_: message
** return value:
*** _WEECHAT_RC_OK_
*** _WEECHAT_RC_ERROR_
* _callback_pointer_: pointer given to callback when it is called by WeeChat
* _callback_data_: pointer given to callback when it is called by WeeChat;
  if not NULL, it must have been allocated with malloc (or similar function)
  and it is automatically freed when the hook is deleted

Return value:

* pointer to new hook, NULL if error occurred

[IMPORTANT]
In scripts, with WeeChat ≥ 1.0, the callback arguments _displayed_ and
_highlight_ are integers (with WeeChat ≤ 0.4.3, they were strings). +
To be compatible with all versions, it is recommended to convert the argument
to integer before testing it, for example in Python: `if int(highlight):`.

C example:

[source,C]
----
int
my_print_cb (const void *pointer, void *data, struct t_gui_buffer *buffer,
             time_t date, int tags_count, const char **tags,
             int displayed, int highlight,
             const char *prefix, const char *message)
{
    /* ... */
    return WEECHAT_RC_OK;
}

/* catch all messages, on all buffers, without color */
struct t_hook *my_print_hook =
    weechat_hook_print (NULL, NULL, NULL, 1, &my_print_cb, NULL, NULL);
----

Script (Python):

[source,python]
----
# prototype
hook = weechat.hook_print(buffer, tags, message, strip_colors, callback, callback_data)

# example
def my_print_cb(data, buffer, date, tags, displayed, highlight, prefix, message):
    if int(highlight):
        # ...
    return weechat.WEECHAT_RC_OK

# catch all messages, on all buffers, without color
hook = weechat.hook_print("", "", "", 1, "my_print_cb", "")
----

==== hook_signal

_Updated in 1.5._

Hook a signal.

Prototype:

[source,C]
----
struct t_hook *weechat_hook_signal (const char *signal,
                                    int (*callback)(const void *pointer,
                                                    void *data,
                                                    const char *signal,
                                                    const char *type_data,
                                                    void *signal_data),
                                    const void *callback_pointer,
                                    void *callback_data);
----

Arguments:

* _signal_: signal to catch, wildcard `+*+` is allowed
  (priority allowed, see note about <<hook_priority,priority>>)
  (see table below)
* _callback_: function called when signal is received, arguments and return
  value:
** _const void *pointer_: pointer
** _void *data_: pointer
** _const char *signal_: signal received
** _const char *type_data_: type of data sent with signal:
*** _WEECHAT_HOOK_SIGNAL_STRING_: string
*** _WEECHAT_HOOK_SIGNAL_INT_: integer number
*** _WEECHAT_HOOK_SIGNAL_POINTER_: pointer
** _void *signal_data_: data sent with signal
** return value:
*** _WEECHAT_RC_OK_
*** _WEECHAT_RC_OK_EAT_ (stop sending the signal immediately)
    _(WeeChat ≥ 0.4.0)_
*** _WEECHAT_RC_ERROR_
* _callback_pointer_: pointer given to callback when it is called by WeeChat
* _callback_data_: pointer given to callback when it is called by WeeChat;
  if not NULL, it must have been allocated with malloc (or similar function)
  and it is automatically freed when the hook is deleted

Return value:

* pointer to new hook, NULL if error occurred

List of signals sent by WeeChat and plugins:

[width="100%",cols="^1,^3,4,5",options="header"]
|===
| Plugin | Signal | Arguments | Description

| guile |
  [[hook_signal_guile_script_loaded]] guile_script_loaded +
  _(WeeChat ≥ 0.3.9)_ |
  String: path to script. |
  Scheme script loaded.

| guile |
  [[hook_signal_guile_script_unloaded]] guile_script_unloaded +
  _(WeeChat ≥ 0.3.9)_ |
  String: path to script. |
  Scheme script unloaded.

| guile |
  [[hook_signal_guile_script_installed]] guile_script_installed +
  _(WeeChat ≥ 0.3.9)_ |
  String: comma-separated list of paths to scripts installed. |
  Scheme script(s) installed.

| guile |
  [[hook_signal_guile_script_removed]] guile_script_removed +
  _(WeeChat ≥ 0.3.9)_ |
  String: comma-separated list of scripts removed. |
  Scheme script(s) removed.

| irc |
  [[hook_signal_xxx_irc_in_yyy]] xxx,irc_in_yyy ^(1)^ |
  String: message. |
  IRC message from server (before irc plugin uses it,
  signal sent only if message is *not* ignored). +
  Since version 2.2, the whole IRC message is sent, including tags.

| irc |
  [[hook_signal_xxx_irc_in2_yyy]] xxx,irc_in2_yyy ^(1)^ |
  String: message. |
  IRC message from server (after irc plugin uses it,
  signal sent only if message is *not* ignored). +
  Since version 2.2, the whole IRC message is sent, including tags.

| irc |
  [[hook_signal_xxx_irc_raw_in_yyy]] xxx,irc_raw_in_yyy ^(1)^ +
  _(WeeChat ≥ 0.3.2)_ |
  String: message. |
  IRC message from server (before irc plugin uses it,
  signal sent even if message is ignored). +
  Since version 2.2, the whole IRC message is sent, including tags.

| irc |
  [[hook_signal_xxx_irc_raw_in2_yyy]] xxx,irc_raw_in2_yyy ^(1)^ +
  _(WeeChat ≥ 0.3.2)_ |
  String: message. |
  IRC message from server (after irc plugin uses it,
  signal sent even if message is ignored). +
  Since version 2.2, the whole IRC message is sent, including tags.

| irc |
  [[hook_signal_xxx_irc_out1_yyy]] xxx,irc_out1_yyy ^(1)^ +
  _(WeeChat ≥ 0.3.7)_ |
  String: message. |
  IRC message sent to server before automatic split
  (to fit in 512 bytes by default).

| irc |
  [[hook_signal_xxx_irc_out_yyy]] xxx,irc_out_yyy ^(1)^ |
  String: message. |
  IRC message sent to server after automatic split
  (to fit in 512 bytes by default). +
  *Warning:* the string may contain invalid UTF-8 data.
  Signal "xxx,irc_out1_yyy" is recommended instead.

| irc |
  [[hook_signal_xxx_irc_outtags_yyy]] xxx,irc_outtags_yyy ^(1)^ +
  _(WeeChat ≥ 0.3.4)_ |
  String: tags + ";" + message. |
  Tags + IRC message sent to server. +
  *Warning:* the string may contain invalid UTF-8 data.
  Signal "xxx,irc_out1_yyy" is recommended instead.

| irc |
  [[hook_signal_irc_ctcp]] irc_ctcp |
  String: message. |
  CTCP received.

| irc |
  [[hook_signal_irc_dcc]] irc_dcc |
  String: message. |
  New DCC.

| irc |
  [[hook_signal_irc_pv]] irc_pv |
  String: message. |
  Private message received.

| irc |
  [[hook_signal_irc_channel_opened]] irc_channel_opened |
  Pointer: buffer. |
  Channel opened.

| irc |
  [[hook_signal_irc_pv_opened]] irc_pv_opened |
  Pointer: buffer. |
  Private opened.

| irc |
  [[hook_signal_irc_server_opened]] irc_server_opened +
  _(WeeChat ≥ 0.3.7)_ |
  Pointer: buffer. |
  Server buffer opened.

| irc |
  [[hook_signal_irc_server_connecting]] irc_server_connecting |
  String: server name. |
  Connecting to server.

| irc |
  [[hook_signal_irc_server_connected]] irc_server_connected |
  String: server name. |
  Connected to server.

| irc |
  [[hook_signal_irc_server_disconnected]] irc_server_disconnected |
  String: server name. |
  Disconnected from server.

| irc |
  [[hook_signal_irc_server_lag_changed]] irc_server_lag_changed +
  _(WeeChat ≥ 1.8)_ |
  String: server name. |
  Lag changed on the server.

| irc |
  [[hook_signal_irc_ignore_removing]] irc_ignore_removing |
  Pointer: ignore. |
  Removing ignore.

| irc |
  [[hook_signal_irc_ignore_removed]] irc_ignore_removed |
  - |
  Ignore removed.

| irc |
  [[hook_signal_irc_notify_join]] irc_notify_join +
  _(WeeChat ≥ 0.3.8)_ |
  String: server name + "," + nick. |
  A nick in notify list has joined server.

| irc |
  [[hook_signal_irc_notify_quit]] irc_notify_quit +
  _(WeeChat ≥ 0.3.8)_ |
  String: server name + "," + nick. |
  A nick in notify list has quit server.

| irc |
  [[hook_signal_irc_notify_away]] irc_notify_away +
  _(WeeChat ≥ 0.3.8)_ |
  String: server name + "," + nick + "," + away message. |
  A nick in notify list is now away on server.

| irc |
  [[hook_signal_irc_notify_still_away]] irc_notify_still_away +
  _(WeeChat ≥ 0.3.8)_ |
  String: server name + "," + nick + "," + away message. |
  A nick in notify list is still away on server (away message has changed).

| irc |
  [[hook_signal_irc_notify_back]] irc_notify_back +
  _(WeeChat ≥ 0.3.8)_ |
  String: server name + "," + nick. |
  A nick in notify list is back (away status removed).

| javascript |
  [[hook_signal_javascript_script_loaded]] javascript_script_loaded +
  _(WeeChat ≥ 1.2)_ |
  String: path to script. |
  JavaScript script loaded.

| javascript |
  [[hook_signal_javascript_script_unloaded]] javascript_script_unloaded +
  _(WeeChat ≥ 1.2)_ |
  String: path to script. |
  JavaScript script unloaded.

| javascript |
  [[hook_signal_javascript_script_installed]] javascript_script_installed +
  _(WeeChat ≥ 1.2)_ |
  String: comma-separated list of paths to scripts installed. |
  JavaScript script(s) installed.

| javascript |
  [[hook_signal_javascript_script_removed]] javascript_script_removed +
  _(WeeChat ≥ 1.2)_ |
  String: comma-separated list of scripts removed. |
  JavaScript script(s) removed.

| logger |
  [[hook_signal_logger_start]] logger_start |
  Pointer: buffer. |
  Start logging for buffer.

| logger |
  [[hook_signal_logger_stop]] logger_stop |
  Pointer: buffer. |
  Stop logging for buffer.

| logger |
  [[hook_signal_logger_backlog]] logger_backlog |
  Pointer: buffer. |
  Display backlog for buffer.

| lua |
  [[hook_signal_lua_script_loaded]] lua_script_loaded +
  _(WeeChat ≥ 0.3.9)_ |
  String: path to script. |
  Lua script loaded.

| lua |
  [[hook_signal_lua_script_unloaded]] lua_script_unloaded +
  _(WeeChat ≥ 0.3.9)_ |
  String: path to script. |
  Lua script unloaded.

| lua |
  [[hook_signal_lua_script_installed]] lua_script_installed +
  _(WeeChat ≥ 0.3.9)_ |
  String: comma-separated list of paths to scripts installed. |
  Lua script(s) installed.

| lua |
  [[hook_signal_lua_script_removed]] lua_script_removed +
  _(WeeChat ≥ 0.3.9)_ |
  String: comma-separated list of scripts removed. |
  Lua script(s) removed.

| perl |
  [[hook_signal_perl_script_loaded]] perl_script_loaded +
  _(WeeChat ≥ 0.3.9)_ |
  String: path to script. |
  Perl script loaded.

| perl |
  [[hook_signal_perl_script_unloaded]] perl_script_unloaded +
  _(WeeChat ≥ 0.3.9)_ |
  String: path to script. |
  Perl script unloaded.

| perl |
  [[hook_signal_perl_script_installed]] perl_script_installed +
  _(WeeChat ≥ 0.3.9)_ |
  String: comma-separated list of paths to scripts installed. |
  Perl script(s) installed.

| perl |
  [[hook_signal_perl_script_removed]] perl_script_removed +
  _(WeeChat ≥ 0.3.9)_ |
  String: comma-separated list of scripts removed. |
  Perl script(s) removed.

| php |
  [[hook_signal_php_script_loaded]] php_script_loaded +
  _(WeeChat ≥ 2.0)_ |
  String: path to script. |
  PHP script loaded.

| php |
  [[hook_signal_php_script_unloaded]] php_script_unloaded +
  _(WeeChat ≥ 2.0)_ |
  String: path to script. |
  PHP script unloaded.

| php |
  [[hook_signal_php_script_installed]] php_script_installed +
  _(WeeChat ≥ 2.0)_ |
  String: comma-separated list of paths to scripts installed. |
  PHP script(s) installed.

| php |
  [[hook_signal_php_script_removed]] php_script_removed +
  _(WeeChat ≥ 2.0)_ |
  String: comma-separated list of scripts removed. |
  PHP script(s) removed.

| python |
  [[hook_signal_python_script_loaded]] python_script_loaded +
  _(WeeChat ≥ 0.3.9)_ |
  String: path to script. |
  Python script loaded.

| python |
  [[hook_signal_python_script_unloaded]] python_script_unloaded +
  _(WeeChat ≥ 0.3.9)_ |
  String: path to script. |
  Python script unloaded.

| python |
  [[hook_signal_python_script_installed]] python_script_installed +
  _(WeeChat ≥ 0.3.9)_ |
  String: comma-separated list of paths to scripts installed. |
  Python script(s) installed.

| python |
  [[hook_signal_python_script_removed]] python_script_removed +
  _(WeeChat ≥ 0.3.9)_ |
  String: comma-separated list of scripts removed. |
  Python script(s) removed.

| relay |
  [[hook_signal_relay_client_connecting]] relay_client_connecting +
  _(WeeChat ≥ 1.0)_ |
  Pointer: relay client. |
  A relay client is connecting.

| relay |
  [[hook_signal_relay_client_waiting_auth]] relay_client_waiting_auth +
  _(WeeChat ≥ 1.0)_ |
  Pointer: relay client. |
  Waiting for authentication from a relay client.

| relay |
  [[hook_signal_relay_client_auth_ok]] relay_client_auth_ok +
  _(WeeChat ≥ 1.0)_ |
  Pointer: relay client. |
  Successful authentication from a relay client.

| relay |
  [[hook_signal_relay_client_connected]] relay_client_connected +
  _(WeeChat ≥ 1.0)_ |
  Pointer: relay client. |
  A relay client is connected.

| relay |
  [[hook_signal_relay_client_auth_failed]] relay_client_auth_failed +
  _(WeeChat ≥ 1.0)_ |
  Pointer: relay client. |
  Authentication of a relay client has failed.

| relay |
  [[hook_signal_relay_client_disconnected]] relay_client_disconnected +
  _(WeeChat ≥ 1.0)_ |
  Pointer: relay client. |
  A relay client is disconnected.

| ruby |
  [[hook_signal_ruby_script_loaded]] ruby_script_loaded +
  _(WeeChat ≥ 0.3.9)_ |
  String: path to script. |
  Ruby script loaded.

| ruby |
  [[hook_signal_ruby_script_unloaded]] ruby_script_unloaded +
  _(WeeChat ≥ 0.3.9)_ |
  String: path to script. |
  Ruby script unloaded.

| ruby |
  [[hook_signal_ruby_script_installed]] ruby_script_installed +
  _(WeeChat ≥ 0.3.9)_ |
  String: comma-separated list of paths to scripts installed. |
  Ruby script(s) installed.

| ruby |
  [[hook_signal_ruby_script_removed]] ruby_script_removed +
  _(WeeChat ≥ 0.3.9)_ |
  String: comma-separated list of scripts removed. |
  Ruby script(s) removed.

| spell |
  [[hook_signal_spell_suggest]] spell_suggest +
  _(WeeChat ≥ 2.4)_ |
  Pointer: buffer. |
  New suggestions for a misspelled word.

| tcl |
  [[hook_signal_tcl_script_loaded]] tcl_script_loaded +
  _(WeeChat ≥ 0.3.9)_ |
  String: path to script. |
  Tcl script loaded.

| tcl |
  [[hook_signal_tcl_script_unloaded]] tcl_script_unloaded +
  _(WeeChat ≥ 0.3.9)_ |
  String: path to script. |
  Tcl script unloaded.

| tcl |
  [[hook_signal_tcl_script_installed]] tcl_script_installed +
  _(WeeChat ≥ 0.3.9)_ |
  String: comma-separated list of paths to scripts installed. |
  Tcl script(s) installed.

| tcl |
  [[hook_signal_tcl_script_removed]] tcl_script_removed +
  _(WeeChat ≥ 0.3.9)_ |
  String: comma-separated list of scripts removed. |
  Tcl script(s) removed.

| weechat |
  [[hook_signal_buffer_opened]] buffer_opened |
  Pointer: buffer. |
  Buffer opened.

| weechat |
  [[hook_signal_buffer_closing]] buffer_closing |
  Pointer: buffer. |
  Closing buffer.

| weechat |
  [[hook_signal_buffer_closed]] buffer_closed |
  Pointer: buffer. |
  Buffer closed.

| weechat |
  [[hook_signal_buffer_cleared]] buffer_cleared |
  Pointer: buffer. |
  Buffer cleared.

| weechat |
  [[hook_signal_buffer_filters_enabled]] buffer_filters_enabled +
  _(WeeChat ≥ 2.0)_ |
  Pointer: buffer. |
  Filters enabled in buffer.

| weechat |
  [[hook_signal_buffer_filters_disabled]] buffer_filters_disabled +
  _(WeeChat ≥ 2.0)_ |
  Pointer: buffer. |
  Filters disabled in buffer.

| weechat |
  [[hook_signal_buffer_hidden]] buffer_hidden |
  Pointer: buffer. |
  Buffer hidden.

| weechat |
  [[hook_signal_buffer_unhidden]] buffer_unhidden |
  Pointer: buffer. |
  Buffer unhidden.

| weechat |
  [[hook_signal_buffer_line_added]] buffer_line_added +
  _(WeeChat ≥ 0.3.7)_ |
  Pointer: line. |
  Line added in a buffer.

| weechat |
  [[hook_signal_buffer_lines_hidden]] buffer_lines_hidden |
  Pointer: buffer. |
  Lines hidden in buffer.

| weechat |
  [[hook_signal_buffer_localvar_added]] buffer_localvar_added |
  Pointer: buffer. |
  Local variable has been added.

| weechat |
  [[hook_signal_buffer_localvar_changed]] buffer_localvar_changed |
  Pointer: buffer. |
  Local variable has changed.

| weechat |
  [[hook_signal_buffer_localvar_removed]] buffer_localvar_removed |
  Pointer: buffer. |
  Local variable has been removed.

| weechat |
  [[hook_signal_buffer_merged]] buffer_merged |
  Pointer: buffer. |
  Buffer merged.

| weechat |
  [[hook_signal_buffer_unmerged]] buffer_unmerged |
  Pointer: buffer. |
  Buffer unmerged.

| weechat |
  [[hook_signal_buffer_moved]] buffer_moved |
  Pointer: buffer. |
  Buffer moved.

| weechat |
  [[hook_signal_buffer_renamed]] buffer_renamed |
  Pointer: buffer. |
  Buffer renamed.

| weechat |
  [[hook_signal_buffer_switch]] buffer_switch |
  Pointer: buffer. |
  Switching buffer.

| weechat |
  [[hook_signal_buffer_title_changed]] buffer_title_changed |
  Pointer: buffer. |
  Title of buffer changed.

| weechat |
  [[hook_signal_buffer_type_changed]] buffer_type_changed |
  Pointer: buffer. |
  Type of buffer changed.

| weechat |
  [[hook_signal_buffer_zoomed]] buffer_zoomed +
  _(WeeChat ≥ 0.4.3)_ |
  Pointer: buffer. |
  Merged buffer zoomed.

| weechat |
  [[hook_signal_buffer_unzoomed]] buffer_unzoomed +
  _(WeeChat ≥ 0.4.3)_ |
  Pointer: buffer. |
  Merged buffer unzoomed.

| weechat |
  [[hook_signal_day_changed]] day_changed +
  _(WeeChat ≥ 0.3.2)_ |
  String: new date, format: "2010-01-31". |
  Day of system date has changed.

| weechat |
  [[hook_signal_debug_dump]] debug_dump |
  String: plugin name. |
  Dump request.

| weechat |
  [[hook_signal_debug_libs]] debug_libs |
  - |
  Display external libraries used.

| weechat |
  [[hook_signal_filter_added]] filter_added |
  Pointer: filter. |
  Filter added.

| weechat |
  [[hook_signal_filter_removing]] filter_removing |
  Pointer: filter. |
  Removing filter.

| weechat |
  [[hook_signal_filter_removed]] filter_removed |
  - |
  Filter removed.

| weechat |
  [[hook_signal_filters_enabled]] filters_enabled |
  - |
  Filters enabled.

| weechat |
  [[hook_signal_filters_disabled]] filters_disabled |
  - |
  Filters disabled.

| weechat |
  [[hook_signal_hotlist_changed]] hotlist_changed |
  Pointer: buffer (can be NULL). |
  Hotlist changed.

| weechat |
  [[hook_signal_input_paste_pending]] input_paste_pending |
  - |
  Paste pending.

| weechat |
  [[hook_signal_input_search]] input_search |
  Pointer: buffer. |
  Text search in buffer.

| weechat |
  [[hook_signal_input_text_changed]] input_text_changed |
  Pointer: buffer. |
  Input text changed.

| weechat |
  [[hook_signal_input_text_cursor_moved]] input_text_cursor_moved |
  Pointer: buffer. |
  Input text cursor moved.

| weechat |
  [[hook_signal_key_bind]] key_bind |
  String: key. |
  Key added.

| weechat |
  [[hook_signal_key_unbind]] key_unbind |
  String: key. |
  Key removed.

| weechat |
  [[hook_signal_key_pressed]] key_pressed |
  String: key pressed. |
  Key pressed.

| weechat |
  [[hook_signal_key_combo_default]] key_combo_default +
  _(WeeChat ≥ 1.0)_ |
  String: key combo. |
  Key combo in _default_ context.

| weechat |
  [[hook_signal_key_combo_search]] key_combo_search +
  _(WeeChat ≥ 1.0)_ |
  String: key combo. |
  Key combo in _search_ context.

| weechat |
  [[hook_signal_key_combo_cursor]] key_combo_cursor +
  _(WeeChat ≥ 1.0)_ |
  String: key combo. |
  Key combo in _cursor_ context.

| weechat |
  [[hook_signal_mouse_enabled]] mouse_enabled +
  _(WeeChat ≥ 1.1)_ |
  - |
  Mouse enabled.

| weechat |
  [[hook_signal_mouse_disabled]] mouse_disabled +
  _(WeeChat ≥ 1.1)_ |
  - |
  Mouse disabled.

| weechat |
  [[hook_signal_nicklist_group_added]] nicklist_group_added +
  _(WeeChat ≥ 0.3.2)_ |
  String: buffer pointer + "," + group name. |
  Group added in nicklist.

| weechat |
  [[hook_signal_nicklist_group_changed]] nicklist_group_changed +
  _(WeeChat ≥ 0.3.4)_ |
  String: buffer pointer + "," + group name. |
  Group changed in nicklist.

| weechat |
  [[hook_signal_nicklist_group_removing]] nicklist_group_removing +
  _(WeeChat ≥ 0.4.1)_ |
  String: buffer pointer + "," + group name. |
  Removing group from nicklist.

| weechat |
  [[hook_signal_nicklist_group_removed]] nicklist_group_removed +
  _(WeeChat ≥ 0.3.2)_ |
  String: buffer pointer + "," + group name. |
  Group removed from nicklist.

| weechat |
  [[hook_signal_nicklist_nick_added]] nicklist_nick_added +
  _(WeeChat ≥ 0.3.2)_ |
  String: buffer pointer + "," + nick name. |
  Nick added in nicklist.

| weechat |
  [[hook_signal_nicklist_nick_changed]] nicklist_nick_changed +
  _(WeeChat ≥ 0.3.4)_ |
  String: buffer pointer + "," + nick name. |
  Nick changed in nicklist.

| weechat |
  [[hook_signal_nicklist_nick_removing]] nicklist_nick_removing +
  _(WeeChat ≥ 0.4.1)_ |
  String: buffer pointer + "," + nick name. |
  Removing nick from nicklist.

| weechat |
  [[hook_signal_nicklist_nick_removed]] nicklist_nick_removed +
  _(WeeChat ≥ 0.3.2)_ |
  String: buffer pointer + "," + nick name. |
  Nick removed from nicklist.

| weechat |
  [[hook_signal_partial_completion]] partial_completion |
  - |
  Partial completion happened.

| weechat |
  [[hook_signal_plugin_loaded]] plugin_loaded +
  _(WeeChat ≥ 0.3.9)_ |
  String: path to plugin loaded. |
  Plugin loaded.

| weechat |
  [[hook_signal_plugin_unloaded]] plugin_unloaded +
  _(WeeChat ≥ 0.3.9)_ |
  String: name of plugin unloaded (example: "irc"). |
  Plugin unloaded.

| weechat |
  [[hook_signal_quit]] quit |
  String: arguments for /quit. |
  Command `/quit` issued by user.

| weechat |
  [[hook_signal_signal_sighup]] signal_sighup +
  _(WeeChat ≥ 1.3)_ |
  - |
  Signal SIGHUP received.

| weechat |
  [[hook_signal_signal_sigquit]] signal_sigquit +
  _(WeeChat ≥ 1.2)_ |
  - |
  Signal SIGQUIT received (quit request with core dump).

| weechat |
  [[hook_signal_signal_sigterm]] signal_sigterm +
  _(WeeChat ≥ 1.2)_ |
  - |
  Signal SIGTERM received (graceful termination of WeeChat process).

| weechat |
  [[hook_signal_signal_sigwinch]] signal_sigwinch +
  _(WeeChat ≥ 0.4.3)_ |
  - |
  Signal SIGWINCH received (terminal was resized).

| weechat |
  [[hook_signal_upgrade]] upgrade |
  String: "quit" if "-quit" argument was given for /upgrade, otherwise NULL. |
  Command `/upgrade` issued by user.

| weechat |
  [[hook_signal_upgrade_ended]] upgrade_ended +
  _(WeeChat ≥ 0.3.4)_ |
  - |
  End of upgrade process (command `/upgrade`).

| weechat |
  [[hook_signal_weechat_highlight]] weechat_highlight |
  String: message with prefix. |
  Highlight happened.

| weechat |
  [[hook_signal_weechat_pv]] weechat_pv |
  String: message with prefix. |
  Private message displayed.

| weechat |
  [[hook_signal_window_closing]] window_closing +
  _(WeeChat ≥ 0.3.6)_ |
  Pointer: window. |
  Closing window.

| weechat |
  [[hook_signal_window_closed]] window_closed +
  _(WeeChat ≥ 0.3.6)_ |
  Pointer: window. |
  Window closed.

| weechat |
  [[hook_signal_window_opened]] window_opened +
  _(WeeChat ≥ 0.4.1)_ |
  Pointer: window. |
  Window opened.

| weechat |
  [[hook_signal_window_scrolled]] window_scrolled |
  Pointer: window. |
  Scroll in window.

| weechat |
  [[hook_signal_window_switch]] window_switch +
  _(WeeChat ≥ 0.3.7)_ |
  Pointer: window. |
  Switching window.

| weechat |
  [[hook_signal_window_zoom]] window_zoom |
  Pointer: current window. |
  Zomming window.

| weechat |
  [[hook_signal_window_zoomed]] window_zoomed |
  Pointer: current window. |
  Window zoomed.

| weechat |
  [[hook_signal_window_unzoom]] window_unzoom |
  Pointer: current window. |
  Unzooming window.

| weechat |
  [[hook_signal_window_unzoomed]] window_unzoomed |
  Pointer: current window. |
  Window unzoomed.

| xfer |
  [[hook_signal_xfer_add]] xfer_add |
  Pointer: infolist with xfer info. |
  New xfer.

| xfer |
  [[hook_signal_xfer_send_ready]] xfer_send_ready |
  Pointer: infolist with xfer info. |
  Xfer ready.

| xfer |
  [[hook_signal_xfer_accept_resume]] xfer_accept_resume |
  Pointer: infolist with xfer info. |
  Accept xfer resume.

| xfer |
  [[hook_signal_xfer_send_accept_resume]] xfer_send_accept_resume |
  Pointer: infolist with xfer info. |
  Xfer resumed.

| xfer |
  [[hook_signal_xfer_start_resume]] xfer_start_resume |
  Pointer: infolist with xfer info. |
  Start resume.

| xfer |
  [[hook_signal_xfer_resume_ready]] xfer_resume_ready |
  Pointer: infolist with xfer info. |
  Xfer resume ready.

| xfer |
  [[hook_signal_xfer_ended]] xfer_ended +
  _(WeeChat ≥ 0.3.2)_ |
  Pointer: infolist with xfer info. |
  Xfer has ended.
|===

[NOTE]
^(1)^ _xxx_ is IRC server name, _yyy_ is IRC command name.

C example:

[source,C]
----
int
my_signal_cb (const void *pointer, void *data, const char *signal,
              const char *type_data, void *signal_data)
{
    /* ... */
    return WEECHAT_RC_OK;
}

/* catch signal "quit" */
struct t_hook *my_signal_hook = weechat_hook_signal ("quit",
                                                     &my_signal_cb, NULL, NULL);
----

Script (Python):

[source,python]
----
# prototype
hook = weechat.hook_signal(signal, callback, callback_data)

# example
def my_signal_cb(data, signal, signal_data):
    # ...
    return weechat.WEECHAT_RC_OK

# catch signal "quit"
hook = weechat.hook_signal("quit", "my_signal_cb", "")
----

==== hook_signal_send

_Updated in 1.0._

Send a signal.

Prototype:

[source,C]
----
int weechat_hook_signal_send (const char *signal, const char *type_data,
                              void *signal_data);
----

Arguments:

* _signal_: signal to send
* _type_data_: type of data sent with signal (see <<_hook_signal,hook_signal>>)
* _signal_data_: data sent with signal

Return value _(WeeChat ≥ 1.0)_:

* return code of last callback executed (_WEECHAT_RC_OK_ if no callback was
  executed):
** _WEECHAT_RC_OK_
** _WEECHAT_RC_OK_EAT_
** _WEECHAT_RC_ERROR_

C example:

[source,C]
----
int rc = weechat_hook_signal_send ("my_signal", WEECHAT_HOOK_SIGNAL_STRING, my_string);
----

Script (Python):

[source,python]
----
# prototype
rc = weechat.hook_signal_send(signal, type_data, signal_data)

# example
rc = weechat.hook_signal_send("my_signal", weechat.WEECHAT_HOOK_SIGNAL_STRING, my_string)
----

[[signal_logger_backlog]]
===== Signal logger_backlog

The signal "logger_backlog" can be sent to display backlog (chat history) in
buffer (for example if you open your own buffer in your plugin/script).

Argument is a pointer to buffer.

C example:

[source,C]
----
weechat_hook_signal_send ("logger_backlog", WEECHAT_HOOK_SIGNAL_POINTER, buffer);
----

Script (Python):

[source,python]
----
weechat.hook_signal_send("logger_backlog", weechat.WEECHAT_HOOK_SIGNAL_POINTER, buffer)
----

[[signals_xxx_script_install]]
===== Signals xxx_script_install

Five signals can be sent to install a script, according to language:

* _perl_script_install_
* _python_script_install_
* _ruby_script_install_
* _lua_script_install_
* _tcl_script_install_
* _guile_script_install_
* _javascript_script_install_
* _php_script_install_

The callback will do following actions when receiving signal:

. Unload and remove installed script.
. Move new script to directory _~/.weechat/xxx/_ (where _xxx_ is language).
. Create link to new script in directory _~/.weechat/xxx/autoload/_
  (only if the script was already auto-loaded, or if the option
  _script.scripts.autoload_ is enabled for a new script).
. Load new script (if the script was loaded).

These signals are used by _script_ plugin to install scripts.

Argument is a string with path to script to install.

C example:

[source,C]
----
weechat_hook_signal_send ("python_script_install", WEECHAT_HOOK_SIGNAL_STRING,
                          "/home/xxx/.weechat/test.py");
----

Script (Python):

[source,python]
----
weechat.hook_signal_send("python_script_install", WEECHAT_HOOK_SIGNAL_STRING,
                         "/home/xxx/.weechat/test.py")
----

[[signals_xxx_script_remove]]
===== Signals xxx_script_remove

Five signals can be sent to remove list of scripts, according to language:

* _perl_script_remove_
* _python_script_remove_
* _ruby_script_remove_
* _lua_script_remove_
* _tcl_script_remove_
* _guile_script_remove_
* _javascript_script_remove_
* _php_script_remove_

For each script in list, the callback will unload then remove script.

These signals are used by _script_ plugin to remove scripts.

Argument is a string with comma-separated list of script to remove (script
is name without path, for example _script.py_).

C example:

[source,C]
----
/* unload and remove scripts test.py and script.py */
weechat_hook_signal_send ("python_script_remove", WEECHAT_HOOK_SIGNAL_STRING,
                          "test.py,script.py");
----

Script (Python):

[source,python]
----
# unload and remove scripts test.py and script.py
weechat.hook_signal_send("python_script_remove", WEECHAT_HOOK_SIGNAL_STRING,
                         "test.py,script.py")
----

[[signal_irc_input_send]]
===== Signal irc_input_send

_WeeChat ≥ 0.3.4, updated in 1.5._

The signal "irc_input_send" can be sent to simulate input in an irc buffer
(server, channel or private).

Argument is a string with following format:

* internal server name (required)
* semicolon
* channel name (optional)
* semicolon
* comma-separated list of options (optional):
** _priority_high_: queue with high priority (like user messages); this is the
   default priority
** _priority_low_: queue with low priority (like messages automatically sent by
   WeeChat)
** _user_message_: force user message (don't execute a command)
* semicolon
* comma-separated list of tags used when sending message (optional)
* semicolon
* text or command (required)

C examples:

[source,C]
----
/* say "Hello!" on freenode server, #weechat channel */
weechat_hook_signal_send ("irc_input_send", WEECHAT_HOOK_SIGNAL_STRING,
                          "freenode;#weechat;priority_high,user_message;;Hello!");

/* send command "/whois FlashCode" on freenode server, with low priority */
weechat_hook_signal_send ("irc_input_send", WEECHAT_HOOK_SIGNAL_STRING,
                          "freenode;;priority_low;;/whois FlashCode");
----

Script (Python):

[source,python]
----
# say "Hello!" on freenode server, #weechat channel
weechat.hook_signal_send("irc_input_send", weechat.WEECHAT_HOOK_SIGNAL_STRING,
                         "freenode;#weechat;priority_high,user_message;;Hello!")

# send command "/whois FlashCode" on freenode server, with low priority
weechat.hook_signal_send("irc_input_send", weechat.WEECHAT_HOOK_SIGNAL_STRING,
                         "freenode;;priority_low;;/whois FlashCode")
----

==== hook_hsignal

_WeeChat ≥ 0.3.4, updated in 1.5._

Hook a hsignal (signal with hashtable).

Prototype:

[source,C]
----
struct t_hook *weechat_hook_hsignal (const char *signal,
                                     int (*callback)(const void *pointer,
                                                     void *data,
                                                     const char *signal,
                                                     struct t_hashtable *hashtable),
                                     const void *callback_pointer,
                                     void *callback_data);
----

Arguments:

* _signal_: signal to catch, wildcard `+*+` is allowed
  (priority allowed, see note about <<hook_priority,priority>>)
  (see table below)
* _callback_: function called when signal is received, arguments and return
  value:
** _const void *pointer_: pointer
** _void *data_: pointer
** _const char *signal_: signal received
** _struct t_hashtable *hashtable_: hashtable
** return value:
*** _WEECHAT_RC_OK_
*** _WEECHAT_RC_OK_EAT_ (stop sending the signal immediately)
    _(WeeChat ≥ 0.4.0)_
*** _WEECHAT_RC_ERROR_
* _callback_pointer_: pointer given to callback when it is called by WeeChat
* _callback_data_: pointer given to callback when it is called by WeeChat;
  if not NULL, it must have been allocated with malloc (or similar function)
  and it is automatically freed when the hook is deleted

Return value:

* pointer to new hook, NULL if error occurred

List of hsignals:

[width="100%",cols="^1,^3,5,5",options="header"]
|===
| Plugin | Signal | Arguments | Description

| irc |
  [[hook_hsignal_irc_redirection_xxx_yyy]] irc_redirection_xxx_yyy ^(1)^ +
  _(WeeChat ≥ 0.3.4)_ |
  See <<hsignal_irc_redirect_command,hsignal_irc_redirect_command>> |
  Redirection output.

| weechat |
  [[hook_hsignal_nicklist_group_added]] nicklist_group_added +
  _(WeeChat ≥ 0.4.1)_ |
  _buffer_ (_struct t_gui_buffer *_): buffer +
  _parent_group_ (_struct t_gui_nick_group *_): parent group +
  _group_ (_struct t_gui_nick_group *_): group |
  Group added in nicklist.

| weechat |
  [[hook_hsignal_nicklist_nick_added]] nicklist_nick_added +
  _(WeeChat ≥ 0.4.1)_ |
  _buffer_ (_struct t_gui_buffer *_): buffer +
  _parent_group_ (_struct t_gui_nick_group *_): parent group +
  _nick_ (_struct t_gui_nick *_): nick |
  Nick added in nicklist.

| weechat |
  [[hook_hsignal_nicklist_group_removing]] nicklist_group_removing +
  _(WeeChat ≥ 0.4.1)_ |
  _buffer_ (_struct t_gui_buffer *_): buffer +
  _parent_group_ (_struct t_gui_nick_group *_): parent group +
  _group_ (_struct t_gui_nick_group *_): group |
  Removing group from nicklist.

| weechat |
  [[hook_hsignal_nicklist_nick_removing]] nicklist_nick_removing +
  _(WeeChat ≥ 0.4.1)_ |
  _buffer_ (_struct t_gui_buffer *_): buffer +
  _parent_group_ (_struct t_gui_nick_group *_): parent group +
  _nick_ (_struct t_gui_nick *_): nick |
  Removing nick from nicklist.

| weechat |
  [[hook_hsignal_nicklist_group_changed]] nicklist_group_changed +
  _(WeeChat ≥ 0.4.1)_ |
  _buffer_ (_struct t_gui_buffer *_): buffer +
  _parent_group_ (_struct t_gui_nick_group *_): parent group +
  _group_ (_struct t_gui_nick_group *_): group |
  Group changed in nicklist.

| weechat |
  [[hook_hsignal_nicklist_nick_changed]] nicklist_nick_changed +
  _(WeeChat ≥ 0.4.1)_ |
  _buffer_ (_struct t_gui_buffer *_): buffer +
  _parent_group_ (_struct t_gui_nick_group *_): parent group +
  _nick_ (_struct t_gui_nick *_): nick |
  Nick changed in nicklist.
|===

[NOTE]
^(1)^ _xxx_ is signal argument used in redirection, _yyy_ is redirection
pattern.

C example:

[source,C]
----
int
my_hsignal_cb (const void *pointer, void *data, const char *signal,
               struct t_hashtable *hashtable)
{
    /* ... */
    return WEECHAT_RC_OK;
}

struct t_hook *my_hsignal_hook = weechat_hook_hsignal ("test",
                                                       &my_hsignal_cb, NULL, NULL);
----

Script (Python):

[source,python]
----
# prototype
hook = weechat.hook_hsignal(signal, callback, callback_data)

# example
def my_hsignal_cb(data, signal, hashtable):
    # ...
    return weechat.WEECHAT_RC_OK

hook = weechat.hook_hsignal("test", "my_hsignal_cb", "")
----

==== hook_hsignal_send

_WeeChat ≥ 0.3.4, updated in 1.0._

Send a hsignal (signal with hashtable).

Prototype:

[source,C]
----
int weechat_hook_hsignal_send (const char *signal, struct t_hashtable *hashtable);
----

Arguments:

* _signal_: signal to send
* _hashtable_: hashtable

Return value _(WeeChat ≥ 1.0)_:

* return code of last callback executed (_WEECHAT_RC_OK_ if no callback was
  executed):
** _WEECHAT_RC_OK_
** _WEECHAT_RC_OK_EAT_
** _WEECHAT_RC_ERROR_

C example:

[source,C]
----
int rc;
struct t_hashtable *hashtable = weechat_hashtable_new (8,
                                                       WEECHAT_HASHTABLE_STRING,
                                                       WEECHAT_HASHTABLE_STRING,
                                                       NULL,
                                                       NULL);
if (hashtable)
{
    weechat_hashtable_set (hashtable, "key", "value");
    rc = weechat_hook_hsignal_send ("my_hsignal", hashtable);
    weechat_hashtable_free (hashtable);
}
----

Script (Python):

[source,python]
----
# prototype
rc = weechat.hook_hsignal_send(signal, hashtable)

# example
rc = weechat.hook_hsignal_send("my_hsignal", {"key": "value"})
----

[[hsignal_irc_redirect_command]]
===== Hsignal irc_redirect_command

_WeeChat ≥ 0.3.4._

The hsignal "irc_redirect_command" can be sent to redirect output of irc
command to a callback.

Argument is a hashtable with following entries (keys and values are string):

* _server_: internal server name (required)
* _pattern_: redirect pattern to use (required), either a default one (defined
  by irc plugin), or a user pattern (see <<hsignal_irc_redirect_pattern>>),
  default patterns are:
** _ison_
** _list_
** _mode_channel_
** _mode_channel_ban_ ("mode #channel b")
** _mode_channel_ban_exception_ ("mode #channel e")
** _mode_channel_invite_ ("mode #channel I")
** _mode_user_
** _monitor_
** _names_
** _ping_
** _time_
** _topic_
** _userhost_
** _who_
** _whois_
** _whowas_
* _signal_: signal name (required)
* _count_: number of times redirection will work (optional, 1 by default)
* _string_: string that must be in irc messages received (optional, but
  recommended, if a string can be used to identify messages)
* _timeout_: timeout for redirect, in seconds (optional, 60 by default)
* _cmd_filter_: comma-separated list of irc commands to filter (only these
  commands will be sent to callbacks, other will be ignored) (optional)

Immediately after sending this hsignal, you must send command to irc server,
and redirection will be used for this command.

When complete answer to your command has been be received, a hsignal will be
send. This hsignal has name _irc_redirection_xxx_yyy_ where _xxx_ is the
_signal_ and _yyy_ the _pattern_ used.

Hashtable sent in hsignal has following content (key and values are strings):

* _output_: output of command (messages are separated by "\n")
* _output_size_: number of bytes in _output_ (as string)
* _error_: error string (if an error occurred):
** _timeout_: redirection stopped after timeout
* _server_: internal server name
* _pattern_: redirect pattern
* _signal_: signal name
* _command_: redirected command

C example:

[source,C]
----
int
test_whois_cb (const void *pointer, void *data, const char *signal,
               struct t_hashtable *hashtable)
{
    weechat_printf (NULL, "error = %s", weechat_hashtable_get (hashtable, "error"));
    weechat_printf (NULL, "output = %s", weechat_hashtable_get (hashtable, "output"));
    return WEECHAT_RC_OK;
}

weechat_hook_hsignal ("irc_redirection_test_whois", &test_whois_cb, NULL, NULL);
struct t_hashtable *hashtable = weechat_hashtable_new (8,
                                                       WEECHAT_HASHTABLE_STRING,
                                                       WEECHAT_HASHTABLE_STRING,
                                                       NULL,
                                                       NULL);
if (hashtable)
{
    weechat_hashtable_set (hashtable, "server", "freenode");
    weechat_hashtable_set (hashtable, "pattern", "whois");
    weechat_hashtable_set (hashtable, "signal", "test");
    weechat_hashtable_set (hashtable, "string", "FlashCode");
    weechat_hook_hsignal_send ("irc_redirect_command", hashtable);
    weechat_hook_signal_send ("irc_input_send", WEECHAT_HOOK_SIGNAL_STRING,
                              "freenode;;2;;/whois FlashCode");
    weechat_hashtable_free (hashtable);
}
----

Script (Python):

[source,python]
----
def test_whois_cb(data, signal, hashtable):
    weechat.prnt("", "error = %s" % hashtable["error"])
    weechat.prnt("", "output = %s" % hashtable["output"])
    return weechat.WEECHAT_RC_OK

weechat.hook_hsignal("irc_redirection_test_whois", "test_whois_cb", "")
weechat.hook_hsignal_send("irc_redirect_command",
                          {"server": "freenode", "pattern": "whois", "signal": "test",
                           "string": "FlashCode"})
weechat.hook_signal_send("irc_input_send", weechat.WEECHAT_HOOK_SIGNAL_STRING,
                         "freenode;;2;;/whois FlashCode")
----

[[hsignal_irc_redirect_pattern]]
===== Hsignal irc_redirect_pattern

_WeeChat ≥ 0.3.4._

The hsignal "irc_redirect_pattern" can be sent to create a pattern for irc
redirect (see <<hsignal_irc_redirect_command>>).

Argument is a hashtable with following entries (keys and values are string):

* _pattern_: name of pattern (required)
* _timeout_: default timeout for pattern, in seconds (optional, 60 by default)
* _cmd_start_: comma-separated list of commands starting redirect (optional)
* _cmd_stop_: comma-separated list of commands stopping redirect (required)
* _cmd_extra_: comma-separated list of commands that may be received
  after stop commands (optional)

For each command in _cmd_start_, _cmd_stop_ and _cmd_extra_, it is possible to
give integer with position of "string" that must be found in received message,
for example:

----
352:1,354,401:1
----

For commands 352 and 401, "string" must be found in received message,
as first argument.

[IMPORTANT]
The pattern is destroyed when it is used by a redirection. If you need pattern
for many redirections, you must create pattern before each redirect.

C example:

[source,C]
----
struct t_hashtable *hashtable = weechat_hashtable_new (8,
                                                       WEECHAT_HASHTABLE_STRING,
                                                       WEECHAT_HASHTABLE_STRING,
                                                       NULL,
                                                       NULL);
if (hashtable)
{
    weechat_hashtable_set (hashtable, "pattern", "my_whois");
    weechat_hashtable_set (hashtable, "timeout", "30");
    weechat_hashtable_set (hashtable, "cmd_start", "311:1");
    weechat_hashtable_set (hashtable, "cmd_stop", "318:1,401:1,402:1,431:1,461");
    weechat_hashtable_set (hashtable, "cmd_extra", "318:1");
    weechat_hook_hsignal_send ("irc_redirect_pattern", hashtable);
    /*
     * now redirect irc whois command with hsignal irc_redirect_command,
     * using pattern "my_whois"
     */
    /* ... */
    weechat_hashtable_free (hashtable);
}
----

Script (Python):

[source,python]
----
weechat.hook_hsignal_send("irc_redirect_pattern",
                          {"pattern": "my_whois", "timeout": "30",
                           "cmd_start": "311:1",
                           "cmd_stop": "318:1,401:1,402:1,431:1,461",
                           "cmd_extra": "318:1"})
# now redirect irc whois command with hsignal irc_redirect_command
# using pattern "my_whois"
# ...
----

==== hook_config

_Updated in 1.5._

Hook a configuration option.

Prototype:

[source,C]
----
struct t_hook *weechat_hook_config (const char *option,
                                    int (*callback)(const void *pointer,
                                                    void *data,
                                                    const char *option,
                                                    const char *value),
                                    const void *callback_pointer,
                                    void *callback_data);
----

Arguments:

* _option_: option, format is full name, as used with command `/set` (for
  example: `weechat.look.item_time_format`), wildcard `+*+` is allowed
  (priority allowed, see note about <<hook_priority,priority>>)
* _callback_: function called when configuration option is changed, arguments
  and return value:
** _const void *pointer_: pointer
** _void *data_: pointer
** _const char *option_: name of option
** _const char *value_: new value for option
** return value:
*** _WEECHAT_RC_OK_
*** _WEECHAT_RC_ERROR_
* _callback_pointer_: pointer given to callback when it is called by WeeChat
* _callback_data_: pointer given to callback when it is called by WeeChat;
  if not NULL, it must have been allocated with malloc (or similar function)
  and it is automatically freed when the hook is deleted

Return value:

* pointer to new hook, NULL if error occurred

C example:

[source,C]
----
int
my_config_cb (const void *pointer, void *data, const char *option,
              const char *value)
{
    /* ... */
    return WEECHAT_RC_OK;
}

/* catch changes to option "weechat.look.item_time_format" */
struct t_hook *my_config_hook = weechat_hook_config ("weechat.look.item_time_format",
                                                     &my_config_cb, NULL, NULL);
----

Script (Python):

[source,python]
----
# prototype
hook = weechat.hook_config(option, callback, callback_data)

# example
def my_config_cb(data, option, value):
    # ...
    return weechat.WEECHAT_RC_OK

# catch changes to option "weechat.look.item_time_format"
hook = weechat.hook_config("weechat.look.item_time_format", "my_config_cb", "")
----

==== hook_modifier

_Updated in 1.5._

Hook a modifier.

Prototype:

[source,C]
----
struct t_hook *weechat_hook_modifier (const char *modifier,
                                      char *(*callback)(const void *pointer,
                                                        void *data,
                                                        const char *modifier,
                                                        const char *modifier_data,
                                                        const char *string),
                                      const void *callback_pointer,
                                      void *callback_data);
----

Arguments:

* _modifier_: modifier name, list of modifiers used by WeeChat or plugins
  (priority allowed, see note about <<hook_priority,priority>>)
  (see table below)
* _callback_: function called when modifier is used, arguments and return value:
** _const void *pointer_: pointer
** _void *data_: pointer
** _const char *modifier_: name of modifier
** _const char *modifier_data_: data for modifier
** _const char *string_: string to modify
** return value: new string
* _callback_pointer_: pointer given to callback when it is called by WeeChat
* _callback_data_: pointer given to callback when it is called by WeeChat;
  if not NULL, it must have been allocated with malloc (or similar function)
  and it is automatically freed when the hook is deleted

Return value:

* pointer to new hook, NULL if error occurred

List of modifiers used by WeeChat and plugins:

[width="100%",cols="^2,3,4,4",options="header"]
|===
| Modifier | Modifier data | String | Output

| [[hook_modifier_irc_in_xxx]] irc_in_xxx ^(1)^ |
  Server name |
  Content of message received from IRC server (before charset decoding). +
  *Warning:* the string may contain invalid UTF-8 data; use only for raw
  operations on a message.
  Modifier <<hook_modifier_irc_in2_xxx,irc_in2_xxx>> is recommended instead. |
  New content of message.

| [[hook_modifier_irc_in2_xxx]] irc_in2_xxx ^(1)^ +
  _(WeeChat ≥ 0.3.5)_ |
  Server name |
  Content of message received from IRC server (after charset decoding). |
  New content of message.

| [[hook_modifier_irc_out1_xxx]] irc_out1_xxx ^(1)^ +
  _(WeeChat ≥ 0.3.7)_ |
  Server name |
  Content of message about to be sent to IRC server before automatic split
  (to fit in 512 bytes by default). |
  New content of message.

| [[hook_modifier_irc_out_xxx]] irc_out_xxx ^(1)^ |
  Server name |
  Content of message about to be sent to IRC server after automatic split
  (to fit in 512 bytes by default). |
  New content of message.

| [[hook_modifier_bar_condition_yyy]] bar_condition_yyy ^(2)^ |
  String with window pointer ("0x123..") |
  Empty string. |
  "1" to display bar, "0" to hide it.

| [[hook_modifier_history_add]] history_add +
  _(WeeChat ≥ 0.3.2)_ |
  String with buffer pointer ("0x123..") |
  Content of command line to add in command history (buffer and global). |
  String added to command history.

| [[hook_modifier_input_text_content]] input_text_content |
  String with buffer pointer ("0x123..") |
  Content of command line. |
  New content of command line.

| [[hook_modifier_input_text_display]] input_text_display |
  String with buffer pointer ("0x123..") |
  Content of command line, without cursor tag. |
  New string, for display only (command line is not changed).

| [[hook_modifier_input_text_display_with_cursor]] input_text_display_with_cursor |
  String with buffer pointer ("0x123..") |
  Content of command line, with cursor tag. |
  New string, for display only (command line is not changed).

| [[hook_modifier_input_text_for_buffer]] input_text_for_buffer +
  _(WeeChat ≥ 0.3.7)_ |
  String with buffer pointer ("0x123..") |
  Content of command line sent to buffer (text or command). |
  New content of command line sent to buffer.

| [[hook_modifier_weechat_print]] weechat_print |
  plugin + ";" + buffer_name + ";" + tags |
  Message printed. |
  New message printed. +
  For more information on the hooks called when a line is printed, see
  <<_hook_line,hook_line>>.
|===

[NOTE]
^(1)^ _xxx_ is IRC command name. +
^(2)^ _yyy_ is bar name.

C example:

[source,C]
----
char *
my_modifier_cb (const void *pointer, void *data, const char *modifier,
                const char *modifier_data,
                const char *string)
{
    char *result;
    int length;

    if (!string)
        return NULL;

    length = strlen (string) + 5;
    result = malloc (length);
    if (result)
    {
        /* add "xxx" to any message printed */
        snprintf (result, length, "%s xxx", string);
    }

    return result;
}

struct t_hook *my_modifier_hook = weechat_hook_modifier ("weechat_print",
                                                         &my_modifier_cb, NULL, NULL);
----

Script (Python):

[source,python]
----
# prototype
hook = weechat.hook_modifier(modifier, callback, callback_data)

# example
def my_modifier_cb(data, modifier, modifier_data, string):
    return "%s xxx" % string

hook = weechat.hook_modifier("weechat_print", "my_modifier_cb", "")
----

==== hook_modifier_exec

Execute modifier(s).

Prototype:

[source,C]
----
char *weechat_hook_modifier_exec (const char *modifier,
                                  const char *modifier_data,
                                  const char *string);
----

Arguments:

* _modifier_: modifier name
* _modifier_data_: modifier data
* _string_: string to modify

Return value:

* string modified, NULL if error occurred

List of modifiers defined by WeeChat and plugins that can be used:

[width="100%",cols="^2,3,4,4",options="header"]
|===
| Modifier | Modifier data | String | Output

| [[hook_modifier_charset_decode]] charset_decode |
  plugin.buffer_name |
  Any string. |
  String decoded from charset found for plugin/buffer to UTF-8.

| [[hook_modifier_charset_encode]] charset_encode |
  plugin.buffer_name |
  Any string. |
  String encoded from UTF-8 to charset found for plugin/buffer.

| [[hook_modifier_irc_color_decode]] irc_color_decode |
  "1" to keep colors, "0" to remove colors |
  Any string. |
  String with IRC colors converted to WeeChat colors (or IRC colors removed).

| [[hook_modifier_irc_color_encode]] irc_color_encode |
  "1" to keep colors, "0" to remove colors |
  Any string. |
  String with IRC colors (or IRC colors removed).

| [[hook_modifier_irc_color_decode_ansi]] irc_color_decode_ansi +
  _(WeeChat ≥ 1.0)_ |
  "1" to keep colors, "0" to remove colors |
  Any string. |
  String with ANSI colors converted to IRC colors (or ANSI colors removed).

| [[hook_modifier_irc_command_auth]] irc_command_auth +
  _(WeeChat ≥ 0.4.1)_ |
  Server name |
  Authentication command (for example: `+/msg nickserv identify password+`). |
  command with hidden password (for example: `+/msg nickserv identify ********+`).

| [[hook_modifier_irc_message_auth]] irc_message_auth +
  _(WeeChat ≥ 0.4.1)_ |
  Server name |
  Message displayed after `/msg` sent to nickserv. |
  Message with hidden password.

| [[hook_modifier_color_decode_ansi]] color_decode_ansi +
  _(WeeChat ≥ 1.0)_ |
  "1" to keep colors, "0" to remove colors |
  Any string. |
  String with ANSI colors converted to WeeChat colors (or ANSI colors removed).

| [[hook_modifier_color_encode_ansi]] color_encode_ansi +
  _(WeeChat ≥ 2.7)_ |
  - |
  Any string. |
  String with WeeChat colors converted to ANSI colors.

| [[hook_modifier_eval_path_home]] eval_path_home +
  _(WeeChat ≥ 2.7)_ |
  - |
  Any string. |
  Evaluated path, result of the function
  <<_string_eval_path_home,string_eval_path_home>>.
|===

C example:

[source,C]
----
char *new_string = weechat_hook_modifier_exec ("my_modifier",
                                               my_data, my_string);
----

Script (Python):

[source,python]
----
# prototype
weechat.hook_modifier_exec(modifier, modifier_data, string)

# example
weechat.hook_modifier_exec("my_modifier", my_data, my_string)
----

==== hook_info

_Updated in 1.5, 2.5._

Hook an information (callback takes and returns a string).

Prototype:

[source,C]
----
struct t_hook *weechat_hook_info (const char *info_name,
                                  const char *description,
                                  const char *args_description,
                                  char *(*callback)(const void *pointer,
                                                    void *data,
                                                    const char *info_name,
                                                    const char *arguments),
                                  const void *callback_pointer,
                                  void *callback_data);
----

Arguments:

* _info_name_: name of info
  (priority allowed, see note about <<hook_priority,priority>>)
* _description_: description
* _args_description_: description of arguments (optional, can be NULL)
* _callback_: function called when info is asked, arguments and return value:
** _const void *pointer_: pointer
** _void *data_: pointer
** _const char *info_name_: name of info
** _const char *arguments_: additional arguments, depending on info
** return value: value of info asked
* _callback_pointer_: pointer given to callback when it is called by WeeChat
* _callback_data_: pointer given to callback when it is called by WeeChat;
  if not NULL, it must have been allocated with malloc (or similar function)
  and it is automatically freed when the hook is deleted

Return value:

* pointer to new hook, NULL if error occurred

[NOTE]
With WeeChat ≥ 2.5, the callback returns an allocated string
(with WeeChat ≤ 2.4, it was a pointer to a static string).

C example:

[source,C]
----
char *
my_info_cb (const void *pointer, void *data, const char *info_name,
            const char *arguments)
{
    /* ... */
    return strdup ("some_info");
}

/* add info "my_info" */
struct t_hook *my_info_hook = weechat_hook_info ("my_info",
                                                 "Some info",
                                                 "Info about arguments",
                                                 &my_info_cb, NULL, NULL);
----

Script (Python):

[source,python]
----
# prototype
hook = weechat.hook_info(info_name, description, args_description, callback, callback_data)

# example
def my_info_cb(data, info_name, arguments):
    return "some_info"

hook = weechat.hook_info("my_info", "Some info", "Info about arguments",
                         "my_info_cb", "")
----

==== hook_info_hashtable

_WeeChat ≥ 0.3.4, updated in 1.5._

Hook an information (callback takes and returns a hashtable).

Prototype:

[source,C]
----
struct t_hook *weechat_hook_info_hashtable (const char *info_name,
                                            const char *description,
                                            const char *args_description,
                                            const char *output_description,
                                            struct t_hashtable *(*callback)(const void *pointer,
                                                                            void *data,
                                                                            const char *info_name,
                                                                            struct t_hashtable *hashtable),
                                            const void *callback_pointer,
                                            void *callback_data);
----

Arguments:

* _info_name_: name of info
  (priority allowed, see note about <<hook_priority,priority>>)
* _description_: description
* _args_description_: description of expected hashtable (optional, can be NULL)
* _output_description_: description of hashtable returned by callback
  (optional, can be NULL)
* _callback_: function called when info is asked, arguments and return value:
** _const void *pointer_: pointer
** _void *data_: pointer
** _const char *info_name_: name of info
** _struct t_hashtable *hashtable_: hashtable, depending on info
** return value: hashtable asked
* _callback_pointer_: pointer given to callback when it is called by WeeChat
* _callback_data_: pointer given to callback when it is called by WeeChat;
  if not NULL, it must have been allocated with malloc (or similar function)
  and it is automatically freed when the hook is deleted

Return value:

* pointer to new hook, NULL if error occurred

C example:

[source,C]
----
struct t_hashtable *
my_info_hashtable_cb (const void *pointer, void *data, const char *info_name,
                      struct t_hashtable *hashtable)
{
    /* ... */
    return pointer_to_new_hashtable;
}

/* add info "my_info_hashtable" */
struct t_hook *my_info_hook = weechat_hook_info_hashtable ("my_info_hashtable",
                                                           "Some info",
                                                           "Info about input hashtable",
                                                           "Info about output hashtable",
                                                           &my_info_hashtable_cb, NULL, NULL);
----

Script (Python):

[source,python]
----
# prototype
hook = weechat.hook_info_hashtable(info_name, description, args_description,
                                   output_description, callback, callback_data)

# example
def my_info_hashtable_cb(data, info_name, hashtable):
    return {"test_key": "test_value"}

hook = weechat.hook_info_hashtable("my_info_hashtable", "Some info",
                                   "Info about input hashtable",
                                   "Info about output hashtable",
                                   "my_info_hashtable_cb", "")
----

==== hook_infolist

_Updated in 1.5._

Hook an infolist: callback will return pointer to infolist asked.

Prototype:

[source,C]
----
struct t_hook *weechat_hook_infolist (const char *infolist_name,
                                      const char *description,
                                      const char *pointer_description,
                                      const char *args_description,
                                      struct t_infolist *(*callback)(const void *pointer,
                                                                     void *data,
                                                                     const char *infolist_name,
                                                                     void *obj_pointer,
                                                                     const char *arguments),
                                      const void *callback_pointer,
                                      void *callback_data);
----

Arguments:

* _infolist_name_: name of infolist
  (priority allowed, see note about <<hook_priority,priority>>)
* _description_: description
* _pointer_description_: description of pointer (optional, can be NULL)
* _args_description_: description of arguments (optional, can be NULL)
* _callback_: function called when infolist is asked, arguments and return
  value:
** _const void *pointer_: pointer
** _void *data_: pointer
** _const char *infolist_name_: name of infolist
** _void *pointer_: pointer to an object that infolist must return (to get only
   one item in infolist)
** _const char *arguments_: additional arguments, depending on infolist
** return value: infolist asked
* _callback_pointer_: pointer given to callback when it is called by WeeChat
* _callback_data_: pointer given to callback when it is called by WeeChat;
  if not NULL, it must have been allocated with malloc (or similar function)
  and it is automatically freed when the hook is deleted

Return value:

* pointer to new hook, NULL if error occurred

C example:

[source,C]
----
struct t_infolist *
my_infolist_cb (const void *pointer, void *data, const char *infolist_name,
                void *obj_pointer, const char *arguments)
{
    struct t_infolist *my_infolist;

    /* build infolist */
    /* ... */

    return my_infolist;
}

/* add infolist "my_infolist" */
struct t_hook *my_infolist = weechat_hook_infolist ("my_infolist",
                                                    "Infolist with some data",
                                                    "Info about pointer",
                                                    "Info about arguments",
                                                    &my_infolist_cb, NULL, NULL);
----

Script (Python):

[source,python]
----
# prototype
hook = weechat.hook_infolist(infolist_name, description, pointer_description,
                             args_description, callback, callback_data)

# example
def my_infolist_cb(data, infolist_name, pointer, arguments):
    # build infolist
    # ...
    return my_infolist

hook = weechat.hook_infolist("my_infolist", "Infolist with some data",
                             "Info about pointer", "Info about arguments",
                             "my_infolist_cb", "")
----

==== hook_hdata

_Updated in 1.5._

Hook a hdata: callback will return pointer to hdata asked.

Prototype:

[source,C]
----
struct t_hook *weechat_hook_hdata (const char *hdata_name,
                                   const char *description,
                                   struct t_hdata *(*callback)(const void *pointer,
                                                               void *data,
                                                               const char *hdata_name),
                                   const void *callback_pointer,
                                   void *callback_data);
----

Arguments:

* _hdata_name_: name of hdata
  (priority allowed, see note about <<hook_priority,priority>>)
* _description_: description
* _callback_: function called when hdata is asked, arguments and return
  value:
** _const void *pointer_: pointer
** _void *data_: pointer
** _const char *hdata_name_: name of hdata
** return value: hdata asked
* _callback_pointer_: pointer given to callback when it is called by WeeChat
* _callback_data_: pointer given to callback when it is called by WeeChat;
  if not NULL, it must have been allocated with malloc (or similar function)
  and it is automatically freed when the hook is deleted

Return value:

* pointer to new hook, NULL if error occurred

C example:

[source,C]
----
struct t_hdata *
my_hdata_cb (const void *pointer, void *data, const char *hdata_name)
{
    struct t_hdata *my_hdata;

    /* build hdata */
    /* ... */

    return my_hdata;
}

/* add hdata "my_hdata" */
struct t_hook *my_hdata = weechat_hook_hdata ("my_hdata",
                                              "Hdata for my structure",
                                              &my_hdata_cb, NULL, NULL);
----

[NOTE]
This function is not available in scripting API.

==== hook_focus

_Updated in 1.5._

Hook a focus: mouse event or key pressed in cursor mode (free movement of
cursor).

Prototype:

[source,C]
----
struct t_hook *weechat_hook_focus (const char *area,
                                   struct t_hashtable *(*callback)(const void *pointer,
                                                                   void *data,
                                                                   struct t_hashtable *info),
                                   const void *callback_pointer,
                                   void *callback_data);
----

Arguments:

* _area_: "chat" for chat area, or name of bar item
  (priority allowed, see note about <<hook_priority,priority>>)
* _callback_: function called when focus is made, arguments and return
  value:
** _const void *pointer_: pointer
** _void *data_: pointer
** _struct t_hashtable *info_: hashtable with info on focus and strings returned
   by other calls to focus callbacks (with higher priority) (see table below)
** return value: either "info" pointer (hashtable completed), or pointer to a
   new hashtable (created by callback, with keys and values of type "string"),
   this new hashtable content will be added to _info_ for other calls to focus
   callbacks
* _callback_pointer_: pointer given to callback when it is called by WeeChat
* _callback_data_: pointer given to callback when it is called by WeeChat;
  if not NULL, it must have been allocated with malloc (or similar function)
  and it is automatically freed when the hook is deleted

[IMPORTANT]
For a mouse gesture, your callback will be called two times: first time when
button is pressed (here the area always matches your area), second time when
button is released, and then the area may not match your area: so you must
*always* test in your callback if area is matching before using info in
hashtable.

Content of hashtable sent to callback (keys and values are of type "string"):

[width="100%",cols="5,5,8,3",options="header"]
|===
| Key ^(1)^ | Description | Value examples | Value if N/A

| _x | Column on screen. |
  "0" ... "n" |

| _y | Line on screen. |
  "0" ... "n" |

| _key | Key or mouse event. |
  "button1", "button2-gesture-left", ... |

| _window | Pointer to window. |
  "0x12345678" | ""

| _window_number | Number of window . |
  "1" ... "n" | "*"

| _buffer | Pointer to buffer. |
  "0x12345678" | ""

| _buffer_number | Number of buffer. |
  "1" ... "n" | "-1"

| _buffer_plugin | Plugin name of buffer. |
  "core", "irc", ... | ""

| _buffer_name | Name of buffer. |
  "weechat", "freenode.#weechat", ... | ""

| _buffer_full_name  | Full name of buffer. |
  "core.weechat", "irc.freenode.#weechat", ... | ""

| _buffer_localvar_XXX ^(2)^ | Local variables of buffer. |
  any value | not set

| _chat | Chat area indicator. |
  "0" or "1" | "0"

| _chat_line | Pointer to line +
  _(WeeChat ≥ 1.2)_. |
  "0x12345678" | ""

| _chat_line_x | Column in line ^(3)^. |
  "0" ... "n" | "-1"

| _chat_line_y | Line number ^(3)^. |
  "0" ... "n" | "-1"

| _chat_line_date | Line date/time. |
  "1313237175" | "0"

| _chat_line_date_printed | Line date/time ^(4)^. |
  "1313237175" | "0"

| _chat_line_time | Time displayed. |
  "14:06:15" | ""

| _chat_line_tags | Tags of line. |
  "irc_privmsg,nick_flashy,log1" | ""

| _chat_line_nick | Nick of line. |
  "FlashCode" | ""

| _chat_line_prefix | Prefix of line. |
  "@FlashCode" | ""

| _chat_line_message | Message of line. |
  "Hello world!" | ""

| _chat_word | Word at (x,y). |
  "Hello" | ""

| _chat_bol | Beginning of line ⇒ (x-1,y). |
  "He" | ""

| _chat_eol | (x,y) ⇒ end of line. |
  "llo world!" | ""

| _bar_name | Name of bar. |
  "title", "nicklist", ... | ""

| _bar_filling | Filling of bar. |
  "horizontal", "vertical", ... | ""

| _bar_item_name | Name of bar item. |
  "buffer_nicklist", "hotlist", ... | ""

| _bar_item_line | Line in bar item. |
  "0" ... "n" | "-1"

| _bar_item_col | Column in bar item. |
  "0" ... "n" | "-1"
|===

[NOTE]
^(1)^ There are same keys suffixed with "2" (ie: "_x2", "_y2", "_window2", ...)
with info on second point (useful only for mouse gestures, to know where mouse
button has been released). +
^(2)^ `XXX` is name of local variable in buffer. +
^(3)^ It is set only for buffers with free content. +
^(4)^ It is date when WeeChat adds line in buffer (greater or equal to
"_chat_line_date").

Extra info for bar item "buffer_nicklist":

[width="60%",cols="1,1,5",options="header"]
|===
| Key      | Plugin ^(1)^ | Description
| nick     | core         | Nick name.
| prefix   | core         | Prefix for nick.
| group    | core         | Group name.
| irc_host | irc          | Host for nick (if known).
|===

[NOTE]
^(1)^ The name of plugin which defines a hook_focus to return info for this bar
item (so for example if plugin is "irc", such info will be available only on
irc buffers).

Return value:

* pointer to new hook, NULL if error occurred

C example:

[source,C]
----
struct t_hashtable *
my_focus_nicklist_cb (const void *pointer, void *data, struct t_hashtable *info)
{
    /* add strings in hashtable */
    /* ... */

    return info;
}

/* add focus on nicklist */
struct t_hook *my_focus = weechat_hook_focus ("buffer_nicklist",
                                              &my_focus_nicklist_cb, NULL, NULL);
----

Script (Python):

[source,python]
----
# prototype
hook = weechat.hook_focus(area, callback, callback_data)

# example
def my_focus_nicklist_cb(data, info):
    # build dict
    # ...
    return my_dict

hook = weechat.hook_focus("buffer_nicklist", "my_focus_nicklist_cb", "")
----

==== hook_set

_WeeChat ≥ 0.3.9 (script: WeeChat ≥ 0.4.3)._

Set string value of a hook property.

Prototype:

[source,C]
----
void weechat_hook_set (struct t_hook *hook, const char *property,
                       const char *value);
----

Arguments:

* _hook_: something hooked with "weechat_hook_xxx()"
* _property_: property name (see table below)
* _value_: new value for property

Properties:

[width="100%",cols="^2,2,2,5",options="header"]
|===
| Name | Hook type | Value | Description

| subplugin | any type | any string |
  Name of sub plugin (commonly script name, which is displayed in
  `/help command` for a hook of type _command_).

| stdin +
  _(WeeChat ≥ 0.4.3)_ |
  _process_, _process_hashtable_ | any string |
  Send data on standard input (_stdin_) of child process.

| stdin_close +
  _(WeeChat ≥ 0.4.3)_ |
  _process_, _process_hashtable_ | (not used) |
  Close pipe used to send data on standard input (_stdin_) of child process.

| signal +
  _(WeeChat ≥ 1.0)_ |
  _process_, _process_hashtable_ |
  signal number or one of these names: `hup`, `int`, `quit`, `kill`, `term`,
  `usr1`, `usr2` |
  Send a signal to the child process.
|===

C example:

[source,C]
----
struct t_hook *my_command_hook =
    weechat_hook_command ("abcd", "description",
                          "args", "description args",
                          "", &my_command_cb, NULL, NULL);
weechat_hook_set (my_command_hook, "subplugin", "test");
----

Script (Python):

[source,python]
----
# prototype
weechat.hook_set(hook, property, value)

# example
def my_process_cb(data, command, return_code, out, err):
    # ...
    return weechat.WEECHAT_RC_OK

hook = weechat.hook_process_hashtable("/path/to/command", {"stdin": "1"},
                                      20000, "my_process_cb", "")
weechat.hook_set(hook, "stdin", "data sent to stdin of child process")
weechat.hook_set(hook, "stdin_close", "")  # optional
----

==== unhook

Unhook something hooked.

Prototype:

[source,C]
----
void weechat_unhook (struct t_hook *hook);
----

Arguments:

* _hook_: something hooked with "weechat_hook_xxx()"

C example:

[source,C]
----
struct t_hook *my_hook = weechat_hook_command ( /* ... */ );
/* ... */
weechat_unhook (my_hook);
----

Script (Python):

[source,python]
----
# prototype
weechat.unhook(hook)

# example
weechat.unhook(my_hook)
----

==== unhook_all

_Updated in 1.5._

Unhook everything that has been hooked by current plugin.

Prototype:

[source,C]
----
void weechat_unhook_all (const char *subplugin);
----

Arguments:

* _subplugin_: if not NULL, unhook only hooks with this "subplugin" set
  (this argument is not available in scripting API)

C example:

[source,C]
----
weechat_unhook_all (NULL);
----

Script (Python):

[source,python]
----
# prototype
weechat.unhook_all()

# example
weechat.unhook_all()
----

[[buffers]]
=== Buffers

Functions to create/query/close buffers.

==== buffer_new

_Updated in 1.5._

Open a new buffer.

Prototype:

[source,C]
----
struct t_gui_buffer *weechat_buffer_new (const char *name,
                                         int (*input_callback)(const void *pointer,
                                                               void *data,
                                                               struct t_gui_buffer *buffer,
                                                               const char *input_data),
                                         const void *input_callback_pointer,
                                         void *input_callback_data,
                                         int (*close_callback)(const void *pointer,
                                                               void *data,
                                                               struct t_gui_buffer *buffer),
                                         const void *close_callback_pointer,
                                         void *close_callback_data);
----

Arguments:

* _name_: name of buffer (must be unique for plugin)
* _input_callback_: function called when input text is entered on buffer,
  arguments and return value:
** _const void *pointer_: pointer
** _void *data_: pointer
** _struct t_gui_buffer *buffer_: buffer pointer
** _const char *input_data_: input data
** return value:
*** _WEECHAT_RC_OK_
*** _WEECHAT_RC_ERROR_
* _input_callback_pointer_: pointer given to callback when it is called by
  WeeChat
* _input_callback_data_: pointer given to callback when it is called by
  WeeChat; if not NULL, it must have been allocated with malloc (or similar
  function) and it is automatically freed when the buffer is closed
* _close_callback_: function called when buffer is closed, arguments and return
  value:
** _const void *pointer_: pointer
** _void *data_: pointer
** _struct t_gui_buffer *buffer_: buffer pointer
** return value:
*** _WEECHAT_RC_OK_
*** _WEECHAT_RC_ERROR_
* _close_callback_pointer_: pointer given to callback when it is called by
  WeeChat
* _close_callback_data_: pointer given to callback when it is called by
  WeeChat; if not NULL, it must have been allocated with malloc (or similar
  function) and it is automatically freed when the buffer is closed

Return value:

* pointer to new buffer, NULL if error occurred

C example:

[source,C]
----
int
my_input_cb (const void *pointer, void *data,
             struct t_gui_buffer *buffer, const char *input_data)
{
    weechat_printf (buffer, "Text: %s", input_data);
    return WEECHAT_RC_OK;
}

int
my_close_cb (const void *pointer, void *data, struct t_gui_buffer *buffer)
{
    weechat_printf (NULL, "Buffer '%s' will be closed!",
                    weechat_buffer_get_string (buffer, "name"));
    return WEECHAT_RC_OK;
}

struct t_gui_buffer *my_buffer = weechat_buffer_new ("my_buffer",
                                                     &my_input_cb, NULL, NULL,
                                                     &my_close_cb, NULL, NULL);
----

Script (Python):

[source,python]
----
# prototype
buffer = weechat.buffer_new(name, input_callback, input_callback_data,
    close_callback, close_callback_data)

# example
def my_input_cb(data, buffer, input_data):
    weechat.prnt(buffer, "Text: %s" % input_data)
    return weechat.WEECHAT_RC_OK

def my_close_cb(data, buffer):
    weechat.prnt("", "Buffer '%s' will be closed!" % weechat.buffer_get_string(buffer, "name"))
    return weechat.WEECHAT_RC_OK

buffer = weechat.buffer_new("my_buffer", "my_input_cb", "", "my_close_cb", "")
----

==== current_buffer

Return pointer to current buffer (buffer displayed by current window).

Prototype:

[source,C]
----
struct t_gui_buffer *weechat_current_buffer ();
----

Return value:

* pointer to current buffer

C example:

[source,C]
----
weechat_printf (weechat_current_buffer (), "Text on current buffer");
----

Script (Python):

[source,python]
----
# prototype
buffer = weechat.current_buffer()

# example
weechat.prnt(weechat.current_buffer(), "Text on current buffer")
----

==== buffer_search

_Updated in 1.0._

Search a buffer by plugin and/or name.

Prototype:

[source,C]
----
struct t_gui_buffer *weechat_buffer_search (const char *plugin,
                                            const char *name);
----

Arguments:

* _plugin_: name of plugin, following special value is allowed:
** `+==+`: the name used is the buffer full name (for example:
   `irc.freenode.#weechat` instead of `freenode.#weechat`)
   _(WeeChat ≥ 1.0)_
* _name_: name of buffer, if it is NULL or empty string, the current buffer is
  returned (buffer displayed by current window); if the name starts with
  `(?i)`, the search is case insensitive _(WeeChat ≥ 1.0)_

Return value:

* pointer to buffer found, NULL if not found

C examples:

[source,C]
----
struct t_gui_buffer *buffer1 = weechat_buffer_search ("irc", "freenode.#weechat");
struct t_gui_buffer *buffer2 = weechat_buffer_search ("==", "irc.freenode.#test");  /* WeeChat ≥ 1.0 */
----

Script (Python):

[source,python]
----
# prototype
buffer = weechat.buffer_search(plugin, name)

# example
buffer = weechat.buffer_search("my_plugin", "my_buffer")
----

==== buffer_search_main

Search WeeChat main buffer (_core_ buffer, first buffer displayed when WeeChat
is starting).

Prototype:

[source,C]
----
struct t_gui_buffer *weechat_buffer_search_main ();
----

Return value:

* pointer to WeeChat main buffer (_core_ buffer)

C example:

[source,C]
----
struct t_gui_buffer *weechat_buffer = weechat_buffer_search_main ();
----

Script (Python):

[source,python]
----
# prototype
buffer = weechat.buffer_search_main()

# example
buffer = weechat.buffer_search_main()
----

==== buffer_clear

Clear content of a buffer.

Prototype:

[source,C]
----
void weechat_buffer_clear (struct t_gui_buffer *buffer);
----

Arguments:

* _buffer_: buffer pointer

C example:

[source,C]
----
struct t_gui_buffer *my_buffer = weechat_buffer_search ("my_plugin",
                                                        "my_buffer");
if (my_buffer)
{
    weechat_buffer_clear (my_buffer);
}
----

Script (Python):

[source,python]
----
# prototype
weechat.buffer_clear(buffer)

# example
buffer = weechat.buffer_search("my_plugin", "my_buffer")
if buffer != "":
    weechat.buffer_clear(buffer)
----

==== buffer_close

Close a buffer.

Prototype:

[source,C]
----
void weechat_buffer_close (struct t_gui_buffer *buffer);
----

Arguments:

* _buffer_: buffer pointer

C example:

[source,C]
----
struct t_gui_buffer *my_buffer = weechat_buffer_new ("my_buffer",
                                                     &my_input_cb, NULL,
                                                     &my_close_cb, NULL);
/* ... */
weechat_buffer_close (my_buffer);
----

Script (Python):

[source,python]
----
# prototype
weechat.buffer_close(buffer)

# example
buffer = weechat.buffer_new("my_buffer", "my_input_cb", "", "my_close_cb", "")
# ...
weechat.buffer_close(buffer)
----

==== buffer_merge

Merge buffer into another buffer: both buffers will still exist separately, but
with same number, and WeeChat will display lines from both buffers (mixed
lines).

Prototype:

[source,C]
----
void weechat_buffer_merge (struct t_gui_buffer *buffer,
                           struct t_gui_buffer *target_buffer);
----

Arguments:

* _buffer_: buffer pointer
* _target_buffer_: target buffer, where buffer will be merged

C example:

[source,C]
----
/* merge current buffer with weechat "core" buffer */
weechat_buffer_merge (weechat_current_buffer (),
                      weechat_buffer_search_main ());
----

Script (Python):

[source,python]
----
# prototype
weechat.buffer_merge(buffer, target_buffer)

# example
# merge current buffer with WeeChat "core" buffer
weechat.buffer_merge(weechat.current_buffer(), weechat.buffer_search_main())
----

==== buffer_unmerge

Unmerge buffer from a group of merged buffers.

Prototype:

[source,C]
----
void weechat_buffer_unmerge (struct t_gui_buffer *buffer,
                             int number);
----

Arguments:

* _buffer_: buffer pointer
* _number_: target number for detached buffer, if it is < 1, then buffer will
  be moved to number of _buffer_ + 1

C example:

[source,C]
----
weechat_buffer_unmerge (weechat_current_buffer (), 1);
----

Script (Python):

[source,python]
----
# prototype
weechat.buffer_unmerge(buffer, number)

# example
weechat.buffer_unmerge(weechat.current_buffer(), 1)
----

==== buffer_get_integer

Return integer value of a buffer property.

Prototype:

[source,C]
----
int weechat_buffer_get_integer (struct t_gui_buffer *buffer,
                                const char *property);
----

Arguments:

* _buffer_: buffer pointer
* _property_: property name:
** _number_: number of buffer (starts to 1)
** _layout_number_: number of buffer saved in layout
** _layout_number_merge_order_: order in merge for layout
** _short_name_is_set_: 1 if short name is set, 0 if not set
** _type_: buffer type (0: formatted, 1: free content)
** _notify_: notify level for buffer
** _num_displayed_: number of windows displaying buffer
** _active_: 2 if buffer is the only active (merged), 1 if buffer is active,
   0 if buffer is merged and not selected
** _hidden_: 1 if buffer is hidden, otherwise 0
   _(WeeChat ≥ 1.0)_
** _zoomed_: 1 if buffer is merged and zoomed, otherwise 0
   _(WeeChat ≥ 1.0)_
** _print_hooks_enabled_: 1 if print hooks are enabled, otherwise 0
** _day_change_: 1 if messages for the day change are displayed, otherwise 0
   _(WeeChat ≥ 0.4.3)_
** _clear_: 1 if buffer can be cleared with command `/buffer clear`, otherwise 0
   _(WeeChat ≥ 1.0)_
** _filter_: 1 if filters are enabled on buffer, otherwise 0
   _(WeeChat ≥ 1.0)_
** _lines_hidden_: 1 if at least one line is hidden on buffer (filtered), or 0
   if all lines are displayed
** _prefix_max_length_: max length for prefix in this buffer
** _time_for_each_line_: 1 if time is displayed for each line in buffer
   (default), otherwise 0
** _nicklist_: 1 if nicklist is enabled, otherwise 0
** _nicklist_case_sensitive_: 1 if nicks are case sensitive, otherwise 0
** _nicklist_max_length_: max length for a nick
** _nicklist_display_groups_: 1 if groups are displayed, otherwise 0
** _nicklist_count_: number of nicks and groups in nicklist
** _nicklist_groups_count_: number of groups in nicklist
** _nicklist_nicks_count_: number of nicks in nicklist
** _nicklist_visible_count_: number of nicks/groups displayed
** _input_: 1 if input is enabled, otherwise 0
** _input_get_unknown_commands_: 1 if unknown commands are sent to input
   callback, otherwise 0
** _input_get_empty_: 1 if empty input is sent to input callback, otherwise 0
** _input_size_: input size (in bytes)
** _input_length_: input length (number of chars)
** _input_pos_: cursor position in buffer input
** _input_1st_display_: first char displayed on screen
** _num_history_: number of commands in history
** _text_search_: text search type:
*** 0: no search at this moment
*** 1: backward search (direction: oldest messages)
*** 2: forward search (direction: newest messages)
** _text_search_exact_: 1 if text search is case sensitive
** _text_search_found_: 1 if text found, otherwise 0

Return value:

* integer value of property

C example:

[source,C]
----
weechat_printf (NULL, "my buffer number is: %d",
                weechat_buffer_get_integer (my_buffer, "number"));
----

Script (Python):

[source,python]
----
# prototype
value = weechat.buffer_get_integer(buffer, property)

# example
weechat.prnt("", "my buffer number is: %d" % weechat.buffer_get_integer(my_buffer, "number"))
----

==== buffer_get_string

Return string value of a buffer property.

Prototype:

[source,C]
----
const char *weechat_buffer_get_string (struct t_gui_buffer *buffer,
                                       const char *property);
----

Arguments:

* _buffer_: buffer pointer
* _property_: property name:
** _plugin_: name of plugin which created this buffer ("core" for WeeChat main
   buffer)
** _name_: name of buffer
** _full_name_: full name of buffer ("plugin.name") _(WeeChat ≥ 0.3.7)_
** _short_name_: short name of buffer (note: used for display only and can be
   changed by user, this must not be used to find name of buffer, use instead
   _name_, _full_name_ or local variable _channel_)
** _title_: title of buffer
** _input_: input text
** _text_search_input_: input saved before text search
** _highlight_words_: list of words to highlight
** _highlight_regex_: POSIX extended regular expression for highlight
** _highlight_tags_restrict_: restrict highlights to messages with these tags
** _highlight_tags_: force highlight on messages with these tags
** _hotlist_max_level_nicks_: max hotlist level for some nicks
** _localvar_xxx_: get content of local variable "xxx" (replace "xxx" by the
   name of variable to read)

Return value:

* string value of property

C example:

[source,C]
----
weechat_printf (NULL, "name / short name of buffer are: %s / %s",
                weechat_buffer_get_string (my_buffer, "name"),
                weechat_buffer_get_string (my_buffer, "short_name"));
----

Script (Python):

[source,python]
----
# prototype
value = weechat.buffer_get_string(buffer, property)

# example
weechat.prnt("", "name / short name of buffer are: %s / %s"
    % (weechat.buffer_get_string(my_buffer, "name"),
    weechat.buffer_get_string(my_buffer, "short_name")))
----

==== buffer_get_pointer

Return pointer value of a buffer property.

Prototype:

[source,C]
----
void *weechat_buffer_pointer (struct t_gui_buffer *buffer,
                              const char *property);
----

Arguments:

* _buffer_: buffer pointer
* _property_: property name:
** _plugin_: pointer to plugin which created this buffer (NULL for WeeChat main
   buffer)
** _highlight_regex_compiled_: regular expression _highlight_regex_ compiled

Return value:

* pointer value of property

C example:

[source,C]
----
weechat_printf (NULL, "plugin pointer of my buffer: %lx",
                weechat_buffer_get_pointer (my_buffer, "plugin"));
----

Script (Python):

[source,python]
----
# prototype
value = weechat.buffer_get_pointer(buffer, property)

# example
weechat.prnt("", "plugin pointer of my buffer: %s" % weechat.buffer_get_pointer(my_buffer, "plugin"))
----

==== buffer_set

Set string value of a buffer property.

Prototype:

[source,C]
----
void weechat_buffer_set (struct t_gui_buffer *buffer, const char *property,
                         const char *value);
----

Arguments:

* _buffer_: buffer pointer
* _property_: property name (see table below)
* _value_: new value for property

Properties:

[width="100%",cols="^2,4,8",options="header"]
|===
| Name | Value | Description

| hotlist | "+", "-", WEECHAT_HOTLIST_LOW, WEECHAT_HOTLIST_MESSAGE,
  WEECHAT_HOTLIST_PRIVATE, WEECHAT_HOTLIST_HIGHLIGHT, "-1" |
  "+": enable hotlist (global setting, buffer pointer is not used) +
  "-": disable hotlist (global setting, buffer pointer is not used) +
  priority: add buffer to hotlist with this priority +
  "-1": remove buffer from hotlist _(WeeChat ≥ 1.0)_.

| completion_freeze | "0" or "1" |
  "0": no freeze of completion (default value)
  (global setting, buffer pointer is not used) +
  "1": do not stop completion when command line is updated
  (global setting, buffer pointer is not used).

| unread | - |
  Set unread marker after last line of buffer.

| display | "1" or "auto" |
  "1": switch to this buffer in current window +
  "auto": switch to this buffer in current window, read marker is not reset.

| hidden +
  _(WeeChat ≥ 1.0)_ | "0" or "1" |
  "0": unhide the buffer +
  "1": hide the buffer.

| number | number |
  Move buffer to this number.

| name | any string |
  Set new name for buffer.

| short_name | any string |
  Set new short name for buffer.

| type | "formatted" or "free" |
  Set type for buffer: "formatted" (for printing chat messages), or "free" (for
  free content); when the value is "free", the property _clear_ is forced to "0"
  _(WeeChat ≥ 1.0)_.

| notify | "0", "1", "2", "3" |
  Set notify level for buffer: "0" = never add to hotlist, "1" = add for
  highlights only, "2" = add for highlights and messages, "3" = add for all
  messages.

| print_hooks_enabled | "0" or "1" |
  "0" to disable print hooks, "1" to enable them (default for a new buffer).

| day_change +
  _(WeeChat ≥ 0.4.3)_ | "0" or "1" |
  "0" to hide messages for the day change, "1" to see them
  (default for a new buffer).

| clear +
  _(WeeChat ≥ 1.0)_ | "0" or "1" |
  "0" to prevent user from clearing buffer with the command `/buffer clear`,
  "1" to let user clear the buffer (default for a new buffer)
   (note: even when it is set to "0", the buffer can still be cleared with
   the function <<_buffer_clear,buffer_clear>>).

| filter +
  _(WeeChat ≥ 1.0)_ | "0" or "1" |
  "0": disable filters on buffer +
  "1": enable filters on buffer.

| title | any string |
  Set new title for buffer.

| time_for_each_line | "0" or "1" |
  "0" to hide time for all lines in buffer, "1" to see time for all lines
  (default for a new buffer).

| nicklist | "0" or "1" |
  "0" to remove nicklist for buffer, "1" to add nicklist for buffer.

| nicklist_case_sensitive | "0" or "1" |
  "0" to have case insensitive nicklist, "1" to have case sensitive nicklist.

| nicklist_display_groups | "0" or "1" |
  "0" to hide nicklist groups, "1" to display nicklist groups.

| highlight_words | "-" or comma separated list of words |
  "-" is a special value to disable any highlight on this buffer, or comma
  separated list of words to highlight in this buffer, for example:
  "abc,def,ghi".

| highlight_words_add | comma separated list of words |
  Comma separated list of words to highlight in this buffer, these words are
  added to existing highlighted words in buffer.

| highlight_words_del | comma separated list of words |
  Comma separated list of words to remove from highlighted words on buffer.

| highlight_regex | any string |
  POSIX extended regular expression for highlight.

| highlight_tags_restrict | comma separated list of tags |
  Restrict highlights to messages with these tags in this buffer
  (it is possible to combine many tags as a logical "and" with separator "+",
   for example: "nick_toto+irc_action").

| highlight_tags | comma separated list of tags |
  Force highlight on messages with these tags in this buffer
  (it is possible to combine many tags as a logical "and" with separator "+",
   for example: "nick_toto+irc_action").

| hotlist_max_level_nicks | comma separated list of "nick:level" |
  Comma separated list of nicks with max level for hotlist on this buffer
  (level can be: -1: never in hotlist, 0: low, 1: message, 2: private,
  3: highlight), for example: "joe:2,mike:-1,robert:-1" (joe will never produce
  highlight on buffer, mike and robert will never change hotlist).

| hotlist_max_level_nicks_add | comma separated list of "nick:level" |
  Comma separated list of nicks with level for hotlist, these nicks are
  added to existing nicks in buffer.

| hotlist_max_level_nicks_del | comma separated list of nicks |
  Comma separated list of nicks to remove from hotlist max levels.

| key_bind_xxx | any string |
  Bind a new key _xxx_, specific to this buffer, value is command to execute
  for this key.

| key_unbind_xxx | - |
  Unbind key _xxx_ for this buffer.

| input | any string |
  Set new value for buffer input.

| input_pos | position |
  Set cursor position in buffer input.

| input_get_unknown_commands | "0" or "1" |
  "0" to disable unknown commands on this buffer (default behavior), "1" to
  get unknown commands, for example if user type "/unknowncmd", buffer will
  receive it (no error about unknown command).

| input_get_empty | "0" or "1" |
  "0" to disable empty input on this buffer (default behavior), "1" to get empty input.

| localvar_set_xxx | any string |
  Set new value for local variable _xxx_ (variable is created if it does not
  exist).

| localvar_del_xxx | - |
  Remove local variable _xxx_.
|===

C example:

[source,C]
----
/* disable hotlist (for all buffers) */
weechat_buffer_set (NULL, "hotlist", "-");

/* enable again hotlist */
weechat_buffer_set (NULL, "hotlist", "+");

/* change buffer name */
weechat_buffer_set (my_buffer, "name", "my_new_name");

/* add new local variable "toto" with value "abc" */
weechat_buffer_set (my_buffer, "localvar_set_toto", "abc");

/* remove local variable "toto" */
weechat_buffer_set (my_buffer, "localvar_del_toto", "");
----

Script (Python):

[source,python]
----
# prototype
weechat.buffer_set(buffer, property, value)

# examples

# disable hotlist (for all buffers)
weechat.buffer_set("", "hotlist", "-")

# enable again hotlist
weechat.buffer_set("", "hotlist", "+")

# change buffer name
weechat.buffer_set(my_buffer, "name", "my_new_name")

# add new local variable "toto" with value "abc"
weechat.buffer_set(my_buffer, "localvar_set_toto", "abc")

# remove local variable "toto"
weechat.buffer_set(my_buffer, "localvar_del_toto", "")
----

==== buffer_set_pointer

Set pointer value of a buffer property.

Prototype:

[source,C]
----
void weechat_buffer_set_pointer (struct t_gui_buffer *buffer, const char *property,
                                 void *pointer);
----

Arguments:

* _buffer_: buffer pointer
* _property_: property name:
** _close_callback_: set close callback function
** _close_callback_data_: set close callback data
** _input_callback_: set input callback function
** _input_callback_data_: set input callback data
** _nickcmp_callback_: set nick comparison callback function (this callback is
   called when searching nick in nicklist) _(WeeChat ≥ 0.3.9)_
** _nickcmp_callback_data_: set nick comparison callback data
   _(WeeChat ≥ 0.3.9)_
* _pointer_: new pointer value for property

Prototypes for callbacks:

[source,C]
----
int close_callback (const void *pointer, void *data,
                    struct t_gui_buffer *buffer);

int input_callback (const void *pointer, void *data,
                    struct t_gui_buffer *buffer, const char *input_data);

int nickcmp_callback (const void *pointer, void *data,
                      struct t_gui_buffer *buffer,
                      const char *nick1, const char *nick2);
----

C example:

[source,C]
----
int
my_close_cb (const void *pointer, void *data, struct t_gui_buffer *buffer)
{
    /* ... */
    return WEECHAT_RC_OK;
}

weechat_buffer_set_pointer (my_buffer, "close_callback", &my_close_cb);
----

[NOTE]
This function is not available in scripting API.

==== buffer_string_replace_local_var

Replace local variables in a string by their values, using buffer local
variables.

Prototype:

[source,C]
----
char *weechat_buffer_string_replace_local_var (struct t_gui_buffer *buffer,
                                               const char *string);
----

Arguments:

* _buffer_: buffer pointer
* _string_: string with text and local variables using format "$var"

Return value:

* string with values of local variables

C example:

[source,C]
----
weechat_buffer_set (my_buffer, "localvar_set_toto", "abc");

char *str = weechat_buffer_string_replace_local_var (my_buffer,
                                                     "test with $toto");
/* str contains "test with abc" */
----

Script (Python):

[source,python]
----
# prototype
value = weechat.buffer_string_replace_local_var(buffer, string)

# example
weechat.buffer_set(my_buffer, "localvar_set_toto", "abc")
str = weechat.buffer_string_replace_local_var(my_buffer, "test with $toto")
# str contains "test with abc"
----

==== buffer_match_list

_WeeChat ≥ 0.3.5._

Check if buffer matches a list of buffers.

Prototype:

[source,C]
----
int weechat_buffer_match_list (struct t_gui_buffer *buffer, const char *string);
----

Arguments:

* _buffer_: buffer pointer
* _string_: comma-separated list of buffers:
** `+*+` means all buffers
** name beginning with `+!+` is excluded
** wildcard `+*+` is allowed in name

Return value:

* 1 if buffer matches list of buffers, 0 otherwise

C example:

[source,C]
----
struct t_gui_buffer *buffer = weechat_buffer_search ("irc", "freenode.#weechat");
if (buffer)
{
    weechat_printf (NULL, "%d", weechat_buffer_match_list (buffer, "*"));                    /* 1 */
    weechat_printf (NULL, "%d", weechat_buffer_match_list (buffer, "*,!*#weechat*"));        /* 0 */
    weechat_printf (NULL, "%d", weechat_buffer_match_list (buffer, "irc.freenode.*"));       /* 1 */
    weechat_printf (NULL, "%d", weechat_buffer_match_list (buffer, "irc.oftc.*,python.*"));  /* 0 */
}
----

Script (Python):

[source,python]
----
# prototype
match = weechat.buffer_match_list(buffer, string)

# example
buffer = weechat.buffer_search("irc", "freenode.#weechat")
if buffer:
    weechat.prnt("", "%d" % weechat.buffer_match_list(buffer, "*"))                    # 1
    weechat.prnt("", "%d" % weechat.buffer_match_list(buffer, "*,!*#weechat*"))        # 0
    weechat.prnt("", "%d" % weechat.buffer_match_list(buffer, "irc.freenode.*"))       # 1
    weechat.prnt("", "%d" % weechat.buffer_match_list(buffer, "irc.oftc.*,python.*"))  # 0
----

[[windows]]
=== Windows

Functions to query windows.

==== current_window

Return pointer to current window.

Prototype:

[source,C]
----
struct t_gui_window *weechat_current_window ();
----

Return value:

* pointer to current window

C example:

[source,C]
----
struct t_gui_window *current_window = weechat_current_window ();
----

Script (Python):

[source,python]
----
# prototype
window = weechat.current_window()

# example
current_window = weechat.current_window()
----

==== window_search_with_buffer

_WeeChat ≥ 0.3.5._

Return pointer to window displaying buffer.

Prototype:

[source,C]
----
struct t_gui_window *weechat_window_search_with_buffer (struct t_gui_buffer *buffer);
----

Arguments:

* _buffer_: buffer pointer

Return value:

* pointer to window displaying buffer (NULL if no window is displaying buffer)

C example:

[source,C]
----
weechat_printf (NULL,
                "window displaying core buffer: %lx",
                weechat_window_search_with_buffer (weechat_buffer_search_main ()));
----

Script (Python):

[source,python]
----
# prototype
window = weechat.window_search_with_buffer(buffer)

# example
weechat.prnt("", "window displaying core buffer: %s"
    % weechat.window_search_with_buffer(weechat.buffer_search_main()))
----

==== window_get_integer

Return integer value of a window property.

Prototype:

[source,C]
----
int weechat_window_get_integer (struct t_gui_window *window,
                                const char *property);
----

Arguments:

* _window_: window pointer
* _property_: property name:
** _number_: number of window (starts to 1)
** _win_x_: X position of window in terminal (first column is 0)
** _win_y_: Y position of window in terminal (first line is 0)
** _win_width_: width of window, in chars
** _win_height_: height of window, in chars
** _win_width_pct_: percentage size, compared to parent window (for example 50
   means half size)
** _win_height_pct_: percentage size, compared to parent window (for example 50
   means half size)
** _win_chat_x_: X position of chat window in terminal (first column is 0)
** _win_chat_y_: Y position of chat window in terminal (first line is 0)
** _win_chat_width_: width of chat window, in chars
** _win_chat_height_: height of chat window, in chars
** _first_line_displayed_: 1 if first line of buffer is displayed on screen,
   otherwise 0
** _scrolling_: 1 if scroll is active on window (last line not displayed)
** _lines_after_: number of lines not displayed after last one displayed
   (when scrolling)

Return value:

* integer value of property

C example:

[source,C]
----
weechat_printf (NULL, "current window is at position (x,y): (%d,%d)",
                weechat_window_get_integer (weechat_current_window (), "win_x"),
                weechat_window_get_integer (weechat_current_window (), "win_y"));
----

Script (Python):

[source,python]
----
# prototype
value = weechat.window_get_integer(window, property)

# example
weechat.prnt("", "current window is at position (x,y): (%d,%d)"
    % (weechat.window_get_integer(weechat.current_window(), "win_x"),
    weechat.window_get_integer(weechat.current_window(), "win_y")))
----

==== window_get_string

Return string value of a window property.

[NOTE]
This function is not used today, it is reserved for a future version.

Prototype:

[source,C]
----
const char *weechat_window_get_string (struct t_gui_window *window,
                                       const char *property);
----

Arguments:

* _window_: window pointer
* _property_: property name

Return value:

* string value of property

Script (Python):

[source,python]
----
# prototype
value = weechat.window_get_string(window, property)
----

==== window_get_pointer

Return pointer value of a window property.

Prototype:

[source,C]
----
void *weechat_window_get_pointer (struct t_gui_window *window,
                                  const char *property);
----

Arguments:

* _window_: window pointer
* _property_: property name:
** _current_: current window pointer
** _buffer_: pointer to buffer displayed by window

Return value:

* pointer value of property

C example:

[source,C]
----
weechat_printf (NULL,
                "buffer displayed in current window: %lx",
                weechat_window_get_pointer (weechat_current_window (), "buffer"));
----

Script (Python):

[source,python]
----
# prototype
value = weechat.window_get_pointer(window, property)

# example
weechat.prnt("", "buffer displayed in current window: %s"
    % weechat.window_get_pointer(weechat.current_window(), "buffer"))
----

==== window_set_title

Set title for terminal.

Prototype:

[source,C]
----
void weechat_window_set_title (const char *title);
----

Arguments:

* _title_: new title for terminal (NULL to reset title); string is evaluated,
  so variables like `${info:version}` can be used
  (see <<_string_eval_expression,string_eval_expression>>)

C example:

[source,C]
----
weechat_window_set_title ("new title here");
----

Script (Python):

[source,python]
----
# prototype
weechat.window_set_title(window, title)

# example
weechat.window_set_title("new title here")
----

[[nicklist]]
=== Nicklist

Functions for buffer nicklist.

==== nicklist_add_group

Add a group in a nicklist.

Prototype:

[source,C]
----
struct t_gui_nick_group *weechat_nicklist_add_group (struct t_gui_buffer *buffer,
                                                     struct t_gui_nick_group *parent_group,
                                                     const char *name,
                                                     const char *color,
                                                     int visible);
----

Arguments:

* _buffer_: buffer pointer
* _parent_group_: pointer to parent of group, NULL if group has no parent
  (nicklist root)
* _name_: group name
* _color_: color option name:
** WeeChat option name, for example _weechat.color.nicklist_group_
** color with optional background, for example _yellow_ or _yellow,red_
** bar color name:
*** _bar_fg_: foreground color for bar
*** _bar_delim_: delimiters color for bar
*** _bar_bg_: background color for bar
* _visible_:
** _1_: group and sub-groups/nicks are visible
** _0_: group and sub-groups/nicks are hidden

[NOTE]
The group name can begin with one or more digits, followed by pipe, and then
group name. When such string is found at beginning, it's used to sort groups
in nicklist. For example groups "1|test" and "2|abc" will be displayed in that
order: first "test" then "abc".

Return value:

* pointer to new group, NULL if an error occurred

C example:

[source,C]
----
struct t_gui_nick_group *my_group =
    weechat_nicklist_add_group (my_buffer,
                                my_parent_group,
                                "test_group",
                                "weechat.color.nicklist_group",
                                1);
----

Script (Python):

[source,python]
----
# prototype
group = weechat.nicklist_add_group(buffer, parent_group, name, color, visible)

# example
group = weechat.nicklist_add_group(my_buffer, my_parent_group, "test_group",
    "weechat.color.nicklist_group", 1)
----

==== nicklist_search_group

Search a group in a nicklist.

Prototype:

[source,C]
----
struct t_gui_nick_group *weechat_nicklist_search_group (struct t_gui_buffer *buffer,
                                                        struct t_gui_nick_group *from_group,
                                                        const char *name);
----

Arguments:

* _buffer_: buffer pointer
* _from_group_: search from this group only, if NULL, then search in whole
  nicklist
* _name_: group name to search

Return value:

* pointer to group found, NULL if not found

C example:

[source,C]
----
struct t_gui_nick_group *ptr_group = weechat_nicklist_search_group (my_buffer,
                                                                    NULL, "test_group");
----

Script (Python):

[source,python]
----
# prototype
group = weechat.nicklist_search_group(buffer, from_group, name)

# example
group = weechat.nicklist_search_group(my_buffer, "", "test_group")
----

==== nicklist_add_nick

Add a nick in a group.

Prototype:

[source,C]
----
struct t_gui_nick_group *weechat_nicklist_add_nick (struct t_gui_buffer *buffer,
                                                    struct t_gui_nick_group *group,
                                                    const char *name,
                                                    const char *color,
                                                    const char *prefix,
                                                    const char *prefix_color,
                                                    int visible);
----

Arguments:

* _buffer_: buffer pointer
* _group_: group pointer
* _name_: nick name
* _color_: color option name:
*** WeeChat option name (from weechat.color.xxx), for example _chat_delimiters_
*** color with optional background, for example _yellow_ or _yellow,red_
*** bar color name:
**** _bar_fg_: foreground color for bar
**** _bar_delim_: delimiters color for bar
**** _bar_bg_: background color for bar
* _prefix_: prefix displayed before nick
* _prefix_color_: color option name:
** WeeChat option name (from weechat.color.xxx), for example _chat_delimiters_
** color with optional background, for example _yellow_ or _yellow,red_
** bar color name:
*** _bar_fg_: foreground color for bar
*** _bar_delim_: delimiters color for bar
*** _bar_bg_: background color for bar
* _visible_:
** _1_: nick is visible
** _0_: nick is hidden

Return value:

* pointer to new nick, NULL if an error occurred

C example:

[source,C]
----
struct t_gui_nick *my_nick =
    weechat_nicklist_add_nick (my_buffer, my_group,
                               "test_nick",
                               (nick_away) ? "weechat.color.nicklist_away" : "bar_fg",
                               "@", "lightgreen",
                               1);
----

Script (Python):

[source,python]
----
# prototype
nick = weechat.nicklist_add_nick(buffer, group, name, color, prefix, prefix_color, visible)

# example
if nick_away:
    color = "weechat.color.nicklist_away"
else:
    color = "bar_fg"
nick = weechat.nicklist_add_nick(my_buffer, my_group, "test_nick", color, "@", "lightgreen", 1)
----

==== nicklist_search_nick

Search a nick in a nicklist.

Prototype:

[source,C]
----
struct t_gui_nick *weechat_nicklist_search_nick (struct t_gui_buffer *buffer,
                                                 struct t_gui_nick_group *from_group,
                                                 const char *name);
----

Arguments:

* _buffer_: buffer pointer
* _from_group_: search from this group only, if NULL, then search in whole
  nicklist
* _name_: nick name to search

Return value:

* pointer to nick found, NULL if not found

C example:

[source,C]
----
struct t_gui_nick *ptr_nick = weechat_nicklist_search_nick (my_buffer,
                                                            NULL, "test_nick");
----

Script (Python):

[source,python]
----
# prototype
nick = weechat.nicklist_search_nick(buffer, from_group, name)

# example
nick = weechat.nicklist_search_nick(my_buffer, "", "test_nick")
----

==== nicklist_remove_group

Remove a group from a nicklist.

Prototype:

[source,C]
----
void weechat_nicklist_remove_group (struct t_gui_buffer *buffer,
                                    struct t_gui_nick_group *group);
----

Arguments:

* _buffer_: buffer pointer
* _group_: group pointer to remove (all sub-groups/nicks will be removed too)

C example:

[source,C]
----
weechat_nicklist_remove_group (my_buffer, my_group);
----

Script (Python):

[source,python]
----
# prototype
weechat.nicklist_remove_group(buffer, group)

# example
weechat.nicklist_remove_group(my_buffer, my_group)
----

==== nicklist_remove_nick

Remove a nick from a nicklist.

Prototype:

[source,C]
----
void weechat_nicklist_remove_nick (struct t_gui_buffer *buffer,
                                   struct t_gui_nick *nick);
----

Arguments:

* _buffer_: buffer pointer
* _nick_: nick pointer to remove

C example:

[source,C]
----
weechat_nicklist_remove_nick (my_buffer, my_nick);
----

Script (Python):

[source,python]
----
# prototype
weechat.nicklist_remove_nick(buffer, nick)

# example
weechat.nicklist_remove_nick(my_buffer, my_nick)
----

==== nicklist_remove_all

Remove all groups/nicks from a nicklist.

Prototype:

[source,C]
----
void weechat_nicklist_remove_all (struct t_gui_buffer *buffer);
----

Arguments:

* _buffer_: buffer pointer

C example:

[source,C]
----
weechat_nicklist_remove_all (my_buffer);
----

Script (Python):

[source,python]
----
# prototype
weechat.nicklist_remove_all(buffer)

# example
weechat.nicklist_remove_all(my_buffer)
----

==== nicklist_get_next_item

_WeeChat ≥ 0.3.7._

Get next group or nick from nicklist (mainly used to display nicklist).

Prototype:

[source,C]
----
void weechat_nicklist_get_next_item (struct t_gui_buffer *buffer,
                                     struct t_gui_nick_group **group,
                                     struct t_gui_nick **nick);
----

Arguments:

* _buffer_: buffer pointer
* _group_: pointer on pointer to group
* _nick_: pointer on pointer to nick

C example:

[source,C]
----
struct t_gui_nick_group *ptr_group;
struct t_gui_nick *ptr_nick;

ptr_group = NULL;
ptr_nick = NULL;
weechat_nicklist_get_next_item (buffer, &ptr_group, &ptr_nick);
while (ptr_group || ptr_nick)
{
    if (ptr_nick)
    {
        /* nick */
        /* ... */
    }
    else
    {
        /* group */
        /* ... */
    }
    weechat_nicklist_get_next_item (buffer, &ptr_group, &ptr_nick);
}
----

[NOTE]
This function is not available in scripting API.

==== nicklist_group_get_integer

_WeeChat ≥ 0.3.4._

Return integer value of a group property.

Prototype:

[source,C]
----
int weechat_nicklist_group_get_integer (struct t_gui_buffer *buffer,
                                        struct t_gui_nick_group *group,
                                        const char *property);
----

Arguments:

* _buffer_: buffer pointer
* _group_: group pointer
* _property_: property name:
** _visible_: 1 if group is visible, otherwise 0
** _level_: group level (root is 0)

Return value:

* integer value of property

C example:

[source,C]
----
int visible = weechat_nicklist_group_get_integer (buffer, group, "visible");
----

Script (Python):

[source,python]
----
# prototype
value = weechat.nicklist_group_get_integer(buffer, group, property)

# example
visible = weechat.nicklist_group_get_integer(buffer, group, "visible")
----

==== nicklist_group_get_string

_WeeChat ≥ 0.3.4._

Return string value of a group property.

Prototype:

[source,C]
----
const char *weechat_nicklist_group_get_string (struct t_gui_buffer *buffer,
                                               struct t_gui_nick_group *group,
                                               const char *property);
----

Arguments:

* _buffer_: buffer pointer
* _group_: group pointer
* _property_: property name:
** _name_: name of group
** _color_: group color in nicklist

Return value:

* string value of property

C example:

[source,C]
----
const char *color = weechat_nicklist_group_get_string (buffer, group, "color");
----

Script (Python):

[source,python]
----
# prototype
value = weechat.nicklist_group_get_string(buffer, group, property)

# example
color = weechat.nicklist_group_get_string(buffer, group, "color")
----

==== nicklist_group_get_pointer

_WeeChat ≥ 0.3.4._

Return pointer value of a group property.

Prototype:

[source,C]
----
void *weechat_nicklist_group_get_pointer (struct t_gui_buffer *buffer,
                                          struct t_gui_nick_group *group,
                                          const char *property);
----

Arguments:

* _buffer_: buffer pointer
* _group_: group pointer
* _property_: property name:
** _parent_: pointer to parent group

Return value:

* pointer value of property

C example:

[source,C]
----
struct t_gui_nick_group *parent = weechat_nicklist_group_get_pointer (buffer, group, "parent");
----

Script (Python):

[source,python]
----
# prototype
value = weechat.nicklist_group_get_pointer(buffer, group, property)

# example
parent = weechat.nicklist_group_get_pointer(buffer, group, "parent")
----

==== nicklist_group_set

_WeeChat ≥ 0.3.4._

Set string value of a group property.

Prototype:

[source,C]
----
void weechat_nicklist_group_set (struct t_gui_buffer *buffer,
                                 struct t_gui_nick_group *group,
                                 const char *property,
                                 const char *value);
----

Arguments:

* _buffer_: buffer pointer
* _group_: group pointer
* _property_: property name (see table below)
* _value_: new value for property

Properties:

[width="100%",cols="^2,4,8",options="header"]
|===
| Name | Value | Description

| color | WeeChat color option name |
  See argument "color" of function <<_nicklist_add_group,nicklist_add_group>>.

| visible | "0", "1" |
  "0" = hidden group, "1" = visible group.
|===

C examples:

[source,C]
----
/* change group color to "bar_fg" */
weechat_nicklist_group_set (buffer, group, "color", "bar_fg");

/* change group color to yellow */
weechat_nicklist_group_set (buffer, group, "color", "yellow");

/* hide group in nicklist */
weechat_nicklist_group_set (buffer, group, "visible", "0");
----

Script (Python):

[source,python]
----
# prototype
weechat.nicklist_group_set(buffer, group, property, value)

# examples

# change group color to "bar_fg"
weechat.nicklist_group_set(buffer, group, "color", "bar_fg")

# change group color to yellow
weechat.nicklist_group_set(buffer, group, "color", "yellow")

# hide group in nicklist
weechat.nicklist_group_set(buffer, group, "visible", "0")
----

==== nicklist_nick_get_integer

_WeeChat ≥ 0.3.4._

Return integer value of a nick property.

Prototype:

[source,C]
----
int weechat_nicklist_nick_get_integer (struct t_gui_buffer *buffer,
                                       struct t_gui_nick *nick,
                                       const char *property);
----

Arguments:

* _buffer_: buffer pointer
* _nick_: nick pointer
* _property_: property name:
** _visible_: 1 if nick is visible, otherwise 0

Return value:

* integer value of property

C example:

[source,C]
----
int visible = weechat_nicklist_nick_get_integer (buffer, nick, "visible");
----

Script (Python):

[source,python]
----
# prototype
value = weechat.nicklist_nick_get_integer(buffer, nick, property)

# example
visible = weechat.nicklist_nick_get_integer(buffer, nick, "visible")
----

==== nicklist_nick_get_string

_WeeChat ≥ 0.3.4._

Return string value of a nick property.

Prototype:

[source,C]
----
const char *weechat_nicklist_nick_get_string (struct t_gui_buffer *buffer,
                                              struct t_gui_nick *nick,
                                              const char *property);
----

Arguments:

* _buffer_: buffer pointer
* _nick_: nick pointer
* _property_: property name:
** _name_: name of nick
** _color_: nick color in nicklist
** _prefix_: prefix of nick
** _prefix_color_: prefix color in nicklist

Return value:

* string value of property

C example:

[source,C]
----
const char *color = weechat_nicklist_nick_get_string (buffer, nick, "color");
----

Script (Python):

[source,python]
----
# prototype
value = weechat.nicklist_nick_get_string(buffer, nick, property)

# example
color = weechat.nicklist_nick_get_string(buffer, nick, "color")
----

==== nicklist_nick_get_pointer

_WeeChat ≥ 0.3.4._

Return pointer value of a nick property.

Prototype:

[source,C]
----
void *weechat_nicklist_nick_get_pointer (struct t_gui_buffer *buffer,
                                         struct t_gui_nick *nick,
                                         const char *property);
----

Arguments:

* _buffer_: buffer pointer
* _nick_: nick pointer
* _property_: property name:
** _group_: pointer to group containing this nick

Return value:

* pointer value of property

C example:

[source,C]
----
struct t_gui_nick_group *group = weechat_nicklist_nick_get_pointer (buffer, nick, "group");
----

Script (Python):

[source,python]
----
# prototype
value = weechat.nicklist_nick_get_pointer(buffer, nick, property)

# example
group = weechat.nicklist_nick_get_pointer(buffer, nick, "group")
----

==== nicklist_nick_set

_WeeChat ≥ 0.3.4._

Set string value of a nick property.

Prototype:

[source,C]
----
void weechat_nicklist_nick_set (struct t_gui_buffer *buffer,
                                struct t_gui_nick *nick,
                                const char *property,
                                const char *value);
----

Arguments:

* _buffer_: buffer pointer
* _nick_: nick pointer
* _property_: property name (see table below)
* _value_: new value for property

Properties:

[width="100%",cols="^2,4,8",options="header"]
|===
| Name | Value | Description

| color | WeeChat color option name |
  See argument "color" of function <<_nicklist_add_nick,nicklist_add_nick>>.

| prefix | any string |
  Prefix of nick.

| prefix_color | WeeChat color option name |
  See argument "prefix_color" of function <<_nicklist_add_nick,nicklist_add_nick>>.

| visible | "0", "1" |
  "0" = hidden nick, "1" = visible nick.
|===

C examples:

[source,C]
----
/* change nick color to cyan */
weechat_nicklist_nick_set (buffer, nick, "color", "cyan");

/* change prefix to "+" */
weechat_nicklist_nick_set (buffer, nick, "prefix", "+");

/* change prefix color to yellow */
weechat_nicklist_nick_set (buffer, nick, "prefix_color", "yellow");

/* hide nick in nicklist */
weechat_nicklist_nick_set (buffer, nick, "visible", "0");
----

Script (Python):

[source,python]
----
# prototype
weechat.nicklist_nick_set(buffer, nick, property, value)

# examples

# change nick color to cyan
weechat.nicklist_nick_set(buffer, nick, "color", "cyan")

# change prefix to "+"
weechat.nicklist_nick_set(buffer, nick, "prefix", "+")

# change prefix color to yellow
weechat.nicklist_nick_set(buffer, nick, "prefix_color", "yellow")

# hide nick in nicklist
weechat.nicklist_nick_set(buffer, nick, "visible", "0")
----

[[bars]]
=== Bars

Functions for bars.

==== bar_item_search

Search a bar item.

Prototype:

[source,C]
----
struct t_gui_bar_item *weechat_bar_item_search (const char *name);
----

Arguments:

* _name_: bar item name

Return value:

* pointer to bar item found, NULL if bar item was not found

C example:

[source,C]
----
struct t_gui_bar_item *bar_item = weechat_bar_item_search ("myitem");
----

Script (Python):

[source,python]
----
# prototype
bar_item = weechat.bar_item_search(name)

# example
bar_item = weechat.bar_item_search("myitem")
----

==== bar_item_new

_Updated in 0.4.2, 1.5._

Create a new bar item.

Prototype:

[source,C]
----
struct t_gui_bar_item *weechat_bar_item_new (const char *name,
                                             char *(*build_callback)(const void *pointer,
                                                                     void *data,
                                                                     struct t_gui_bar_item *item,
                                                                     struct t_gui_window *window,
                                                                     struct t_gui_buffer *buffer,
                                                                     struct t_hashtable *extra_info),
                                             const void *build_callback_pointer,
                                             void *build_callback_data);
----

Arguments:

* _name_: bar item name
* _build_callback_: function called when bar item is built, arguments and
  return value:
** _const void *pointer_: pointer
** _void *data_: pointer
** _struct t_gui_bar_item *item_: item pointer
** _struct t_gui_window *window_: window pointer (NULL when called for a root
   bar)
** _struct t_gui_buffer *buffer_: buffer displayed in window (if window is NULL,
   then it is current buffer) or buffer given in bar item with syntax:
   "@buffer:item" _(WeeChat ≥ 0.4.2)_
** _struct t_hashtable *extra_info_: always NULL (argument is reserved for a
   future version) _(WeeChat ≥ 0.4.2)_
** return value: content of bar item
* _build_callback_pointer_: pointer given to build callback, when it is called
  by WeeChat
* _build_callback_data_: pointer given to callback when it is called by
  WeeChat; if not NULL, it must have been allocated with malloc (or similar
  function) and it is automatically freed when the bar item is removed

Return value:

* pointer to new bar item, NULL if an error occurred

C example:

[source,C]
----
char *
my_build_callback (const void *pointer, void *data,
                   struct t_gui_bar_item *item,
                   struct t_gui_window *window,
                   struct t_gui_buffer *buffer,
                   struct t_hashtable *extra_info)
{
    return strdup ("my content");
}

struct t_gui_bar_item *my_item = weechat_bar_item_new ("myitem",
                                                       &my_build_callback,
                                                       NULL, NULL);
----

Script (Python):

[IMPORTANT]
For compatibility with versions ≤ 0.4.1, the default callback has only 3
arguments: _data_, _item_ and _window_ (no _buffer_ and _extra_info_). +
To use a callback with all arguments, you must add "(extra)" before the name,
see example below (supported only in WeeChat ≥ 0.4.2).

[source,python]
----
# prototype
bar_item = weechat.bar_item_new(name, build_callback, build_callback_data)

# example (callback without "buffer" and "extra_info")
def my_build_callback(data, item, window):
    return "my content"

bar_item = weechat.bar_item_new("myitem", "my_build_callback", "")

# example (callback with all arguments, for WeeChat ≥ 0.4.2)
def my_build_callback2(data, item, window, buffer, extra_info):
    return "my content"

bar_item2 = weechat.bar_item_new("(extra)myitem2", "my_build_callback2", "")  # WeeChat ≥ 0.4.2
----

==== bar_item_update

Update content of a bar item, by calling its build callback.

Prototype:

[source,C]
----
void weechat_bar_item_update (const char *name);
----

Arguments:

* _name_: bar item name

C example:

[source,C]
----
weechat_bar_item_update ("myitem");
----

Script (Python):

[source,python]
----
# prototype
weechat.bar_item_update(name)

# example
weechat.bar_item_update("myitem")
----

==== bar_item_remove

Remove a bar item.

Prototype:

[source,C]
----
void weechat_bar_item_remove (struct t_gui_bar_item *item);
----

Arguments:

* _item_: bar item pointer

C example:

[source,C]
----
weechat_bar_item_remove (&my_item);
----

Script (Python):

[source,python]
----
# prototype
weechat.bar_item_remove(item)

# example
weechat.bar_item_remove(myitem)
----

==== bar_search

Search a bar.

Prototype:

[source,C]
----
struct t_gui_bar *weechat_bar_search (const char *name);
----

Arguments:

* _name_: bar name

Return value:

* pointer to bar found, NULL if bar was not found

C example:

[source,C]
----
struct t_gui_bar *bar = weechat_bar_search ("mybar");
----

Script (Python):

[source,python]
----
# prototype
bar = weechat.bar_search(name)

# example
bar = weechat.bar_search("mybar")
----

==== bar_new

Create a new bar.

Prototype:

[source,C]
----
struct t_gui_bar *weechat_bar_new (const char *name,
                                   const char *hidden,
                                   const char *priority,
                                   const char *type,
                                   const char *condition,
                                   const char *position,
                                   const char *filling_top_bottom,
                                   const char *filling_left_right,
                                   const char *size,
                                   const char *size_max,
                                   const char *color_fg,
                                   const char *color_delim,
                                   const char *color_bg,
                                   const char *separator,
                                   const char *items);
----

Arguments:

* _name_: bar name
* _hidden_:
** _on_: bar is hidden
** _off_: bar is visible
* _priority_: bar priority (integer)
* _type_:
** _root_: bar displayed once, outside windows
** _window_: bar displayed in each window
* _condition_: condition for displaying bar:
** _active_: bar is displayed in active window only
** _inactive_: bar is displayed in inactive windows only
** _nicklist_: bar is displayed in windows with nicklist
** evaluated expression: see the
   link:weechat_user.en.html#bar_conditions[WeeChat user's guide / Bar conditions]
* _position_: _top_, _bottom_, _left_ or _right_
* _filling_top_bottom_:
** _horizontal_: items are filled horizontally (space after each item)
** _vertical_: items are filled vertically (new line after each item)
** _columns_horizontal_: items are filled horizontally, displayed with columns
** _columns_vertical_: items are filled vertically, displayed with columns
* _filling_left_right_:
** _horizontal_: items are filled horizontally (space after each item)
** _vertical_: items are filled vertically (new line after each item)
** _columns_horizontal_: items are filled horizontally, displayed with columns
** _columns_vertical_: items are filled vertically, displayed with columns
* _size_: bar size in chars (0 means automatic size)
* _size_max_: max size for bar (0 means no max size)
* _color_fg_: color for text in bar
* _color_delim_: color for delimiters in bar
* _color_bg_: background color for bar
* _separator_:
** _on_: bar has separator line with other windows/bars
** _off_: no separator
* _items_: list of items in bar, separated by comma (space between items), or
  "+" (glued items)

Return value:

* pointer to new bar, NULL if an error occurred

C example:

[source,C]
----
struct t_gui_bar *my_bar = weechat_bar_new ("mybar",
                                            "off",
                                            "100",
                                            "window",
                                            "",
                                            "top",
                                            "horizontal",
                                            "vertical",
                                            "0",
                                            "5",
                                            "default",
                                            "cyan",
                                            "blue",
                                            "off",
                                            "time,buffer_number+buffer_name");
----

Script (Python):

[source,python]
----
# prototype
bar = weechat.bar_new(name, hidden, priority, type, condition, position,
    filling_top_bottom, filling_left_right, size, size_max,
    color_fg, color_delim, color_bg, separator, items)

# example
bar = weechat.bar_new("mybar", "off", "100", "window", "", "top", "horizontal", "vertical",
    "0", "5", "default", "cyan", "blue", "off", "time,buffer_number+buffer_name")
----

==== bar_set

Set a new value for a bar property.

Prototype:

[source,C]
----
int weechat_bar_set (struct t_gui_bar *bar, const char *property,
                     const char *value);
----

Arguments:

* _bar_: bar pointer
* _property_: name, hidden, priority, conditions, position, filling_top_bottom,
  filling_left_right, size, size_max, color_fg, color_delim, color_bg,
  separator, items (see <<_bar_new,bar_new>>)
* _value_: new value for property

Return value:

* 1 if new value was set, 0 if an error occurred

C example:

[source,C]
----
weechat_bar_set (mybar, "position", "bottom");
----

Script (Python):

[source,python]
----
# prototype
weechat.bar_set(bar, property, value)

# example
weechat.bar_set(my_bar, "position", "bottom")
----

==== bar_update

Refresh content of a bar on screen.

Prototype:

[source,C]
----
void weechat_bar_update (const char *name);
----

Arguments:

* _name_: bar name

C example:

[source,C]
----
weechat_bar_update ("mybar");
----

Script (Python):

[source,python]
----
# prototype
weechat.bar_update(name)

# example
weechat.bar_update("mybar")
----

==== bar_remove

Remove a bar.

Prototype:

[source,C]
----
void weechat_bar_remove (struct t_gui_bar *bar);
----

Arguments:

* _bar_: bar pointer

C example:

[source,C]
----
weechat_bar_remove (mybar);
----

Script (Python):

[source,python]
----
# prototype
weechat.bar_remove(bar)

# example
weechat.bar_remove(my_bar)
----

[[commands]]
=== Commands

Functions for executing WeeChat commands.

==== command

_Updated in 1.1._

Execute a command or send text to buffer.

Prototype:

[source,C]
----
int weechat_command (struct t_gui_buffer *buffer, const char *command);
----

Arguments:

* _buffer_: buffer pointer (command is executed on this buffer, use NULL for
  current buffer)
* _command_: command to execute (if beginning with a "/"), or text to send to
  buffer

Return value _(WeeChat ≥ 1.1)_:

* _WEECHAT_RC_OK_ if successful
* _WEECHAT_RC_ERROR_ if error

C example:

[source,C]
----
int rc;
rc = weechat_command (weechat_buffer_search ("irc", "freenode.#weechat"),
                      "/whois FlashCode");
----

Script (Python):

[source,python]
----
# prototype
weechat.command(buffer, command)

# example
rc = weechat.command(weechat.buffer_search("irc", "freenode.#weechat"), "/whois FlashCode")
----

==== command_options

_WeeChat ≥ 2.5._

Execute a command or send text to buffer with options.

Prototype:

[source,C]
----
int weechat_command_options (struct t_gui_buffer *buffer, const char *command,
                             struct t_hashtable *options);
----

Arguments:

* _buffer_: buffer pointer (command is executed on this buffer, use NULL for
  current buffer)
* _command_: command to execute (if beginning with a "/"), or text to send to
  buffer
* _options_: a hashtable with some options (keys and values must be string)
  (can be NULL):
** _commands_: a comma-separated list of commands allowed to be executed during
   this call; see function <<_string_match_list,string_match_list>> for the
   format
** _delay_: delay to execute command, in milliseconds

Return value:

* _WEECHAT_RC_OK_ if successful
* _WEECHAT_RC_ERROR_ if error

C example:

[source,C]
----
/* allow any command except /exec, run command in 2 seconds */
int rc;
struct t_hashtable *options = weechat_hashtable_new (8,
                                                     WEECHAT_HASHTABLE_STRING,
                                                     WEECHAT_HASHTABLE_STRING,
                                                     NULL,
                                                     NULL);
weechat_hashtable_set (options, "commands", "*,!exec");
weechat_hashtable_set (options, "delay", "2000");
rc = weechat_command_options (NULL, "/some_command arguments", options);
----

Script (Python):

[source,python]
----
# prototype
weechat.command_options(buffer, command, options)

# example: allow any command except /exec
rc = weechat.command("", "/some_command arguments", {"commands": "*,!exec"})
----

[[network]]
=== Network

Network functions.

==== network_pass_proxy

Establish a connection/authentication to a proxy.

[IMPORTANT]
This function is blocking on call to connect(), so it must be called in a forked
process only, to not block WeeChat.

Prototype:

[source,C]
----
int weechat_network_pass_proxy (const char *proxy,
                                int sock,
                                const char *address,
                                int port);
----

Arguments:

* _proxy_: proxy name to use
* _sock_: socket to use
* _address_: address (hostname or IP address)
* _port_: port

Return value:

* 1 if connection is OK, 0 if an error occurred

C example:

[source,C]
----
if (weechat_network_pass_proxy ("my_proxy", sock, "chat.freenode.net", 6667))
{
    /* OK */
}
else
{
    /* error */
}
----

[NOTE]
This function is not available in scripting API.

==== network_connect_to

_Updated in 0.4.3._

Establish a connection to a remote host.

[IMPORTANT]
This function is blocking on call to connect(), so it must be called in a forked
process only, to not block WeeChat.

Prototype:

[source,C]
----
int weechat_network_connect_to (const char *proxy,
                                struct sockaddr *address,
                                socklen_t address_length);
----

Arguments:

* _proxy_: proxy name to use
* _address_: address to connect to (with port)
* _address_length_: length of argument _address_

Return value:

* socket number (>= 0) if connection is OK, -1 if an error occurred

C example:

[source,C]
----
struct sockaddr *addr;
socklen_t length;
int sock;

/* allocate/set address and port in _addr_, set _length_ */
/* ... */

sock = weechat_network_connect_to (NULL, addr, length);
if (sock >= 0)
{
    /* OK */
}
else
{
    /* error */
}
----

[NOTE]
This function is not available in scripting API.

[[infos]]
=== Infos

Functions to get infos.

==== info_get

_Updated in 2.5._

Return info, as string, from WeeChat or a plugin.

Prototype:

[source,C]
----
char *weechat_info_get (const char *info_name, const char *arguments);
----

Arguments:

* _info_name_: name of info to read (see table below)
* _arguments_: arguments for info asked (optional, NULL if no argument is
  needed)

Return value:

* string with info asked, NULL if an error occurred
  (must be freed by calling "free" after use)

[NOTE]
With WeeChat ≥ 2.5, the value returned is an allocated string
(with WeeChat ≤ 2.4, it was a pointer to a static string).

Infos:

include::autogen/plugin_api/infos.adoc[]

C example:

[source,C]
----
char *version = weechat_info_get ("version", NULL);
char *date = weechat_info_get ("date", NULL);
weechat_printf (NULL, "Current WeeChat version is: %s (compiled on %s)",
                version, date);
if (version)
    free (version);
if (date)
    free (date);

char *weechat_dir = weechat_info_get ("weechat_dir", NULL);
weechat_printf (NULL, "WeeChat home is: %s", weechat_dir);
if (weechat_dir)
    free (weechat_dir);
----

Script (Python):

[source,python]
----
# prototype
value = weechat.info_get(info_name, arguments)

# example
weechat.prnt("", "Current WeeChat version is: %s (compiled on %s)"
    % (weechat.info_get("version", ""), weechat.info_get("date", ""))
weechat.prnt("", "WeeChat home is: %s" % weechat.info_get("weechat_dir", ""))
----

==== info_get_hashtable

_WeeChat ≥ 0.3.4._

Return info, as hashtable, from WeeChat or a plugin.

Prototype:

[source,C]
----
struct t_hashtable *weechat_info_get_hashtable (const char *info_name,
                                                struct t_hashtable *hashtable);
----

Arguments:

* _info_name_: name of info to read (see table below)
* _hashtable_: hashtable with arguments (depends on info asked) (optional, NULL
  if no argument is needed)

Return value:

* hashtable with info asked, NULL if an error occurred

Infos:

include::autogen/plugin_api/infos_hashtable.adoc[]

C example:

[source,C]
----
struct t_hashtable *hashtable_in, *hashtable_out;

hashtable_in = weechat_hashtable_new (8,
                                      WEECHAT_HASHTABLE_STRING,
                                      WEECHAT_HASHTABLE_STRING,
                                      NULL,
                                      NULL);
if (hashtable_in)
{
    weechat_hashtable_set (
        hashtable_in,
        "message",
        "@time=2015-06-27T16:40:35.000Z :nick!user@host PRIVMSG #weechat :hello!");
    hashtable_out = weechat_info_get_hashtable ("irc_message_parse",
                                                hashtable_in);
    /*
     * now hashtable_out has following keys/values:
     *   "tags"                : "time=2015-06-27T16:40:35.000Z"
     *   "message_without_tags": ":nick!user@host PRIVMSG #weechat :hello!"
     *   "nick"                : "nick"
     *   "user"                : "user"
     *   "host"                : "nick!user@host"
     *   "command"             : "PRIVMSG"
     *   "channel"             : "#weechat"
     *   "arguments"           : "#weechat :hello!"
     *   "text"                : "hello!"
     *   "pos_command"         : "47"
     *   "pos_arguments"       : "55"
     *   "pos_channel"         : "55"
     *   "pos_text"            : "65"
     */
    weechat_hashtable_free (hashtable_in);
    weechat_hashtable_free (hashtable_out);
}
----

[NOTE]
See the link:weechat_scripting.en.html#irc_message_parse[WeeChat scripting guide / Parse message]
for more info about "irc_message_parse" output.

Script (Python):

[source,python]
----
# prototype
dict = weechat.info_get_hashtable(info_name, dict_in)

# example
dict_in = {"message": ":nick!user@host PRIVMSG #weechat :message here"}
weechat.prnt("", "message parsed: %s"
             % weechat.info_get_hashtable("irc_message_parse", dict_in))
----

[[infolists]]
=== Infolists

An infolist is a list of "items". Each item contains variables.

For example, infolist "irc_server" has N items (N is number of IRC servers
defined). For each item, there is variables like "name", "buffer",
"is_connected", ...

Each variable has a type and a value. Possible types are:

* _integer_: any integer value
* _string_: any string value
* _pointer_: any pointer
* _buffer_: buffer with fixed length, containing any data
* _time_: time value

==== infolist_new

Create a new infolist.

Prototype:

[source,C]
----
struct t_infolist *weechat_infolist_new ();
----

Return value:

* pointer to new infolist

C example:

[source,C]
----
struct t_infolist *infolist = weechat_infolist_new ();
----

Script (Python):

[source,python]
----
# prototype
infolist = weechat.infolist_new()

# example
infolist = weechat.infolist_new()
----

==== infolist_new_item

Add an item in an infolist.

Prototype:

[source,C]
----
struct t_infolist_item *weechat_infolist_new_item (struct t_infolist *infolist);
----

Arguments:

* _infolist_: infolist pointer

Return value:

* pointer to new item

C example:

[source,C]
----
struct t_infolist_item *item = weechat_infolist_new_item (infolist);
----

Script (Python):

[source,python]
----
# prototype
item = weechat.infolist_new_item(infolist)

# example
item = weechat.infolist_new_item(infolist)
----

==== infolist_new_var_integer

Add an integer variable to an infolist item.

Prototype:

[source,C]
----
struct t_infolist_var *weechat_infolist_new_var_integer (struct t_infolist_item *item,
                                                         const char *name,
                                                         int value);
----

Arguments:

* _item_: infolist item pointer
* _name_: variable name
* _value_: integer value

Return value:

* pointer to new variable

C example:

[source,C]
----
struct t_infolist_var *var = weechat_infolist_new_var_integer (item,
                                                               "my_integer",
                                                               123);
----

Script (Python):

[source,python]
----
# prototype
var = weechat.infolist_new_var_integer(item, name, value)

# example
var = weechat.infolist_new_var_integer(item, "my_integer", 123)
----

==== infolist_new_var_string

Add a string variable to an infolist item.

Prototype:

[source,C]
----
struct t_infolist_var *weechat_infolist_new_var_string (struct t_infolist_item *item,
                                                        const char *name,
                                                        const char *value);
----

Arguments:

* _item_: infolist item pointer
* _name_: variable name
* _value_: string value

Return value:

* pointer to new variable

C example:

[source,C]
----
struct t_infolist_var *var = weechat_infolist_new_var_string (item,
                                                              "my_string",
                                                              "value");
----

Script (Python):

[source,python]
----
# prototype
var = weechat.infolist_new_var_string(item, name, value)

# example
var = weechat.infolist_new_var_string(item, "my_string", "value")
----

==== infolist_new_var_pointer

Add a pointer variable to an infolist item.

Prototype:

[source,C]
----
struct t_infolist_var *weechat_infolist_new_var_pointer (struct t_infolist_item *item,
                                                         const char *name,
                                                         void *pointer);
----

Arguments:

* _item_: infolist item pointer
* _name_: variable name
* _pointer_: pointer

Return value:

* pointer to new variable

C example:

[source,C]
----
struct t_infolist_var *var = weechat_infolist_new_var_pointer (item,
                                                               "my_pointer",
                                                               &pointer);
----

Script (Python):

[source,python]
----
# prototype
var = weechat.infolist_new_var_pointer(item, name, pointer)

# example
var = weechat.infolist_new_var_pointer(item, "my_pointer", pointer)
----

==== infolist_new_var_buffer

Add a buffer variable to an infolist item.

Prototype:

[source,C]
----
struct t_infolist_var *weechat_infolist_new_var_buffer (struct t_infolist_item *item,
                                                        const char *name,
                                                        void *pointer,
                                                        int size);
----

Arguments:

* _item_: infolist item pointer
* _name_: variable name
* _pointer_: pointer to buffer
* _size_: size of buffer

Return value:

* pointer to new variable

C example:

[source,C]
----
char buffer[256];
/* ... */
struct t_infolist_var *var = weechat_infolist_new_var_buffer (item,
                                                              "my_buffer",
                                                              &buffer,
                                                              sizeof (buffer));
----

[NOTE]
This function is not available in scripting API.

==== infolist_new_var_time

Add a time variable to an infolist item.

Prototype:

[source,C]
----
struct t_infolist_var *weechat_infolist_new_var_time (struct t_infolist_item *item,
                                                      const char *name,
                                                      time_t time);
----

Arguments:

* _item_: infolist item pointer
* _name_: variable name
* _time_: time value

Return value:

* pointer to new variable

C example:

[source,C]
----
struct t_infolist_var *var = weechat_infolist_new_var_time (item,
                                                            "my_time",
                                                            time (NULL));
----

Script (Python):

[source,python]
----
# prototype
var = weechat.infolist_new_var_time(item, name, time)

# example
var = weechat.infolist_new_var_time(item, "my_time", int(time.time()))
----

==== infolist_get

Return infolist from WeeChat or a plugin.

[IMPORTANT]
Content of infolist is a duplication of actual data. So if you are asking
infolist with lot of data (like "buffer_lines"), WeeChat will allocate memory
to duplicate all data, and this can take some time. +
Instead of using big infolist, it is preferable to use hdata (but infolist may
have more info than hdata, which is raw data), see <<hdata,hdata>>.

Prototype:

[source,C]
----
struct t_infolist *weechat_infolist_get (const char *infolist_name,
                                         void *pointer,
                                         const char *arguments);
----

Arguments:

* _infolist_name_: name of infolist to read (see table below)
* _pointer_: pointer to an item, to get only this item in infolist (optional,
  can be NULL)
* _arguments_: arguments for infolist asked (optional, NULL if no argument is
  needed)

Return value:

* pointer to infolist, NULL if an error occurred

Infolists:

include::autogen/plugin_api/infolists.adoc[]

C example:

[source,C]
----
struct t_infolist *infolist = weechat_infolist_get ("irc_server", NULL, NULL);
----

Script (Python):

[source,python]
----
# prototype
infolist = weechat.infolist_get(infolist_name, pointer, arguments)

# example
infolist = weechat.infolist_get("irc_server", "", "")
----

==== infolist_next

Move "cursor" to next item in an infolist. The first call to this function for
an infolist moves cursor to first item in infolist.

Prototype:

[source,C]
----
int weechat_infolist_next (struct t_infolist *infolist);
----

Arguments:

* _infolist_: infolist pointer

Return value:

* 1 if cursor has been moved on next item, 0 if end of list was reached

C example:

[source,C]
----
if (weechat_infolist_next (infolist))
{
    /* read variables in item... */
}
else
{
    /* no more item available */
}
----

Script (Python):

[source,python]
----
# prototype
rc = weechat.infolist_next(infolist)

# example
rc = weechat.infolist_next(infolist)
if rc:
    # read variables in item...
else:
    # no more item available
----

==== infolist_prev

Move "cursor" to previous item in an infolist. The first call to this function
for an infolist moves cursor to last item in infolist.

Prototype:

[source,C]
----
int weechat_infolist_prev (struct t_infolist *infolist);
----

Arguments:

* _infolist_: infolist pointer

Return value:

* 1 if cursor has been moved on previous item, 0 if beginning of list was
  reached

C example:

[source,C]
----
if (weechat_infolist_prev (infolist))
{
    /* read variables in item... */
}
else
{
    /* no more item available */
}
----

Script (Python):

[source,python]
----
# prototype
rc = weechat.infolist_prev(infolist)

# example
rc = weechat.infolist_prev(infolist)
if rc:
    # read variables in item...
else:
    # no more item available
----

==== infolist_reset_item_cursor

Reset "cursor" for infolist.

Prototype:

[source,C]
----
void weechat_infolist_reset_item_cursor (struct t_infolist *infolist);
----

Arguments:

* _infolist_: infolist pointer

C example:

[source,C]
----
weechat_infolist_reset_item_cursor (infolist);
----

Script (Python):

[source,python]
----
# prototype
weechat.infolist_reset_item_cursor(infolist)

# example
weechat.infolist_reset_item_cursor(infolist)
----

==== infolist_search_var

_WeeChat ≥ 0.4.3._

Search a variable in the current infolist item.

Prototype:

[source,C]
----
struct t_infolist_var *weechat_infolist_search_var (struct t_infolist *infolist,
                                                    const char *name);
----

Arguments:

* _infolist_: infolist pointer
* _name_: variable name

Return value:

* pointer to variable found, NULL if the variable was not found

C example:

[source,C]
----
if (weechat_infolist_search_var (infolist, "name"))
{
    /* variable "name" exists */
    /* ... */
}
----

Script (Python):

[source,python]
----
# prototype
var = weechat.infolist_search_var(infolist, name)

# example
if weechat.infolist_search_var(infolist, "name"):
    # variable "name" exists
    # ...
----

==== infolist_fields

Return list of fields for current infolist item.

Prototype:

[source,C]
----
const char *weechat_infolist_fields (struct t_infolist *infolist);
----

Arguments:

* _infolist_: infolist pointer

Return value:

* string with list of fields for current infolist item. List is comma
  separated, and contains letter for type, followed by variable name. Types
  are: "i" (integer), "s" (string), "p" (pointer), "b" (buffer), "t" (time).

C example:

[source,C]
----
const char *fields = weechat_infolist_fields (infolist);
/* fields contains something like:
   "i:my_integer,s:my_string,p:my_pointer,b:my_buffer,t:my_time" */
----

Script (Python):

[source,python]
----
# prototype
fields = weechat.infolist_fields(infolist)

# example
fields = weechat.infolist_fields(infolist)
# fields contains something like:
# "i:my_integer,s:my_string,p:my_pointer,b:my_buffer,t:my_time"
----

==== infolist_integer

Return value of integer variable in current infolist item.

Prototype:

[source,C]
----
int weechat_infolist_integer (struct t_infolist *infolist, const char *var);
----

Arguments:

* _infolist_: infolist pointer
* _var_: variable name (must be type "integer")

Return value:

* integer value of variable

C example:

[source,C]
----
weechat_printf (NULL, "integer = %d",
                weechat_infolist_integer (infolist, "my_integer"));
----

Script (Python):

[source,python]
----
# prototype
value = weechat.infolist_integer(infolist, var)

# example
weechat.prnt("", "integer = %d" % weechat.infolist_integer(infolist, "my_integer"))
----

==== infolist_string

Return value of string variable in current infolist item.

Prototype:

[source,C]
----
const char *weechat_infolist_string (struct t_infolist *infolist, const char *var);
----

Arguments:

* _infolist_: infolist pointer
* _var_: variable name (must be type "string")

Return value:

* string value of variable

C example:

[source,C]
----
weechat_printf (NULL, "string = %s",
                weechat_infolist_string (infolist, "my_string"));
----

Script (Python):

[source,python]
----
# prototype
value = weechat.infolist_string(infolist, var)

# example
weechat.prnt("", "string = %s" % weechat.infolist_string(infolist, "my_string"))
----

==== infolist_pointer

Return value of pointer variable in current infolist item.

Prototype:

[source,C]
----
void *weechat_infolist_pointer (struct t_infolist *infolist, const char *var);
----

Arguments:

* _infolist_: infolist pointer
* _var_: variable name (must be type "pointer")

Return value:

* pointer value of variable

C example:

[source,C]
----
weechat_printf (NULL, "pointer = 0x%lx",
                weechat_infolist_pointer (infolist, "my_pointer"));
----

Script (Python):

[source,python]
----
# prototype
value = weechat.infolist_pointer(infolist, var)

# example
weechat.prnt("", "pointer = 0x%s" % weechat.infolist_pointer(infolist, "my_pointer"))
----

==== infolist_buffer

Return value of buffer variable in current infolist item.

Prototype:

[source,C]
----
void *weechat_infolist_buffer (struct t_infolist *infolist, const char *var,
                               int *size);
----

Arguments:

* _infolist_: infolist pointer
* _var_: variable name (must be type "buffer")
* _size_: pointer to integer variable, will be set with buffer size

Return value:

* buffer pointer

C example:

[source,C]
----
int size;
void *pointer = weechat_infolist_buffer (infolist, "my_buffer", &size);
weechat_printf (NULL, "buffer = 0x%lx, size = %d",
                pointer, size);
----

[NOTE]
This function is not available in scripting API.

==== infolist_time

Return value of time variable in current infolist item.

Prototype:

[source,C]
----
time_t weechat_infolist_time (struct t_infolist *infolist, const char *var);
----

Arguments:

* _infolist_: infolist pointer
* _var_: variable name (must be type "time")

Return value:

* time value of variable

C example:

[source,C]
----
weechat_printf (NULL, "time = %ld",
                weechat_infolist_time (infolist, "my_time"));
----

Script (Python):

[source,python]
----
# prototype
value = weechat.infolist_time(infolist, var)

# example
weechat.prnt("", "time = %ld" % weechat.infolist_time(infolist, "my_time"))
----

==== infolist_free

Free an infolist.

Prototype:

[source,C]
----
void weechat_infolist_free (struct t_infolist *infolist);
----

Arguments:

* _infolist_: infolist pointer

C example:

[source,C]
----
weechat_infolist_free (infolist);
----

Script (Python):

[source,python]
----
# prototype
weechat.infolist_free(infolist)

# example
weechat.infolist_free(infolist)
----

[[hdata]]
=== Hdata

Functions for hdata (raw access to WeeChat or plugins data).

[IMPORTANT]
Hdata provides read-only access to data. It is *STRICTLY FORBIDDEN* to write
something in memory pointed by hdata variables. +
The only way to update data is to call function
<<_hdata_update,hdata_update>>.

==== hdata_new

_WeeChat ≥ 0.3.6, updated in 0.3.9 and 0.4.0._

Create a new hdata.

[NOTE]
.hdata vs infolist
====
Hdata is a fast way to read WeeChat or plugins data. It is similar to
infolist, but there are some differences:

* It is faster and uses less memory: direct read of data without duplication.
* It may have different info than infolist: it contains only raw data in
  structures (infolist may add some extra data for convenience).
====

Prototype:

[source,C]
----
struct t_hdata *weechat_hdata_new (const char *hdata_name, const char *var_prev, const char *var_next,
                                   int create_allowed, int delete_allowed,
                                   int (*callback_update)(void *data,
                                                          struct t_hdata *hdata,
                                                          void *pointer,
                                                          struct t_hashtable *hashtable),
                                   void *callback_update_data);
----

Arguments:

* _hdata_name_: name of hdata
* _var_prev_: name of variable in structure which is a pointer to previous
  element in list (may be NULL if no such variable is available)
* _var_next_: name of variable in structure which is a pointer to next
  element in list (may be NULL if no such variable is available)
* _create_allowed_: 1 if create of structure is allowed, otherwise 0
  _(WeeChat ≥ 0.4.0)_
* _delete_allowed_: 1 if delete of structure is allowed, otherwise 0
  _(WeeChat ≥ 0.3.9)_
* _callback_update_: callback to update data in hdata, can be NULL if no update
  is allowed _(WeeChat ≥ 0.3.9)_, arguments and return value:
** _void *data_: pointer
** _struct t_hdata *hdata_: pointer to hdata
** _struct t_hashtable *hashtable_: hashtable with variables to update
   (see <<_hdata_update,hdata_update>>)
** return value: number of variables updated
* _callback_update_data_: pointer given to update callback when it is called by
  WeeChat _(WeeChat ≥ 0.3.9)_

Return value:

* pointer to new hdata

C example:

[source,C]
----
struct t_hdata *hdata = weechat_hdata_new ("myplugin_list", "prev", "next", 0, 0, &callback_update, NULL);
----

[NOTE]
This function is not available in scripting API.

==== hdata_new_var

_WeeChat ≥ 0.3.6, updated in 0.3.9._

Create a new variable in hdata.

Prototype:

[source,C]
----
void weechat_hdata_new_var (struct t_hdata *hdata, const char *name, int offset, int type,
                            int update_allowed, const char *array_size, const char *hdata_name);
----

Arguments:

* _hdata_: hdata pointer
* _name_: variable name
* _offset_: offset of variable in structure
* _type_: variable type, one of:
** WEECHAT_HDATA_CHAR
** WEECHAT_HDATA_INTEGER
** WEECHAT_HDATA_LONG
** WEECHAT_HDATA_STRING
** WEECHAT_HDATA_SHARED_STRING
** WEECHAT_HDATA_POINTER
** WEECHAT_HDATA_TIME
** WEECHAT_HDATA_HASHTABLE
** WEECHAT_HDATA_OTHER
* _update_allowed_: 1 if update of variable is allowed, otherwise 0
  _(WeeChat ≥ 0.3.9)_
* _array_size_: not NULL only if a variable is an array, and it can be:
  _(WeeChat ≥ 0.3.9)_
** name of variable in hdata: this variable will be used as size of array
   (dynamic size for array)
** integer (as string): fixed size for array
** _*_: automatic size: the size of array is computed by looking at values, when
   the first NULL is found (only for type string, pointer or hashtable)
* _hdata_name_: name of a hdata (if it's a pointer to a structure with hdata)

C example:

[source,C]
----
struct t_myplugin_list
{
    char *name;
    struct t_gui_buffer *buffer;
    int tags_count;
    char **tags_array;
    char **string_split;
    struct t_myplugin_list *prev;
    struct t_myplugin_list *next;
};

/* ... */

struct t_hdata *hdata = weechat_hdata_new ("myplugin_list", "prev", "next");
weechat_hdata_new_var (hdata, "name", offsetof (struct t_myplugin_list, name), WEECHAT_HDATA_STRING, 0, NULL, NULL);
weechat_hdata_new_var (hdata, "buffer", offsetof (struct t_myplugin_list, buffer), WEECHAT_HDATA_POINTER, 0, NULL, NULL);
weechat_hdata_new_var (hdata, "tags_count", offsetof (struct t_myplugin_list, tags_count), WEECHAT_HDATA_INTEGER, 0, NULL, NULL);
weechat_hdata_new_var (hdata, "tags_array", offsetof (struct t_myplugin_list, tags_array), WEECHAT_HDATA_STRING, 0, "tags_count", NULL);
weechat_hdata_new_var (hdata, "string_split", offsetof (struct t_myplugin_list, string_split), WEECHAT_HDATA_STRING, 0, "*", NULL);
weechat_hdata_new_var (hdata, "prev", offsetof (struct t_myplugin_list, prev), WEECHAT_HDATA_POINTER, 0, NULL, "myplugin_list");
weechat_hdata_new_var (hdata, "next", offsetof (struct t_myplugin_list, next), WEECHAT_HDATA_POINTER, 0, NULL, "myplugin_list");
----

The macro "WEECHAT_HDATA_VAR" can be used to shorten code:

[source,C]
----
WEECHAT_HDATA_VAR(struct t_myplugin_list, name, STRING, 0, NULL, NULL);
WEECHAT_HDATA_VAR(struct t_myplugin_list, buffer, POINTER, 0, NULL, NULL);
WEECHAT_HDATA_VAR(struct t_myplugin_list, tags_count, INTEGER, 0, NULL, NULL);
WEECHAT_HDATA_VAR(struct t_myplugin_list, tags_array, STRING, 0, "tags_count", NULL);
WEECHAT_HDATA_VAR(struct t_myplugin_list, string_split, STRING, 0, "*", NULL);
WEECHAT_HDATA_VAR(struct t_myplugin_list, prev, POINTER, 0, NULL, "myplugin_list");
WEECHAT_HDATA_VAR(struct t_myplugin_list, next, POINTER, 0, NULL, "myplugin_list");
----

[NOTE]
This function is not available in scripting API.

==== hdata_new_list

_WeeChat ≥ 0.3.6, updated in 1.0._

Create a new list pointer in hdata.

Prototype:

[source,C]
----
void weechat_hdata_new_list (struct t_hdata *hdata, const char *name, void *pointer, int flags);
----

Arguments:

* _hdata_: hdata pointer
* _name_: variable name
* _pointer_: list pointer
* _flags_: combination of following values: _(WeeChat ≥ 1.0)_
** _WEECHAT_HDATA_LIST_CHECK_POINTERS_: list used to check pointers

C example:

[source,C]
----
struct t_myplugin_list
{
    char *name;
    struct t_gui_buffer *buffer;
    int tags_count;
    char **tags_array;
    char **string_split;
    struct t_myplugin_list *prev;
    struct t_myplugin_list *next;
};

/* ... */

struct t_hdata *hdata = weechat_hdata_new ("myplugin_list", "prev", "next");
weechat_hdata_new_var (hdata, "name", offsetof (struct t_myplugin_list, name), WEECHAT_HDATA_STRING, NULL, NULL);
weechat_hdata_new_var (hdata, "buffer", offsetof (struct t_myplugin_list, buffer), WEECHAT_HDATA_POINTER, NULL, NULL);
weechat_hdata_new_var (hdata, "tags_count", offsetof (struct t_myplugin_list, tags_count), WEECHAT_HDATA_INTEGER, NULL, NULL);
weechat_hdata_new_var (hdata, "tags_array", offsetof (struct t_myplugin_list, tags_array), WEECHAT_HDATA_STRING, "tags_count", NULL);
weechat_hdata_new_var (hdata, "string_split", offsetof (struct t_myplugin_list, string_split), WEECHAT_HDATA_STRING, "*", NULL);
weechat_hdata_new_var (hdata, "prev", offsetof (struct t_myplugin_list, prev), WEECHAT_HDATA_POINTER, NULL, "myplugin_list");
weechat_hdata_new_var (hdata, "next", offsetof (struct t_myplugin_list, next), WEECHAT_HDATA_POINTER, NULL, "myplugin_list");

weechat_hdata_new_list (hdata, "buffers", &buffers, WEECHAT_HDATA_LIST_CHECK_POINTERS);
weechat_hdata_new_list (hdata, "last_buffer", &last_buffer, 0);
----

The macro "WEECHAT_HDATA_LIST" can be used to shorten code:

[source,C]
----
WEECHAT_HDATA_LIST(buffers, WEECHAT_HDATA_LIST_CHECK_POINTERS);
WEECHAT_HDATA_LIST(last_buffer, 0);
----

[NOTE]
This function is not available in scripting API.

==== hdata_get

_WeeChat ≥ 0.3.6._

Return hdata for a WeeChat or plugin structure.

[NOTE]
Hdata does not contain data, it's only a hashtable with position of variables
in structure. That means you will need this hdata and a pointer to a
WeeChat/plugin object to read some data.

Prototype:

[source,C]
----
struct t_hdata *weechat_hdata_get (const char *hdata_name);
----

Arguments:

* _hdata_name_: name of hdata (see list below)

Return value:

* pointer to hdata, NULL if an error occurred

List of hdata:

include::autogen/plugin_api/hdata.adoc[]

C example:

[source,C]
----
struct t_hdata *hdata = weechat_hdata_get ("irc_server");
----

Script (Python):

[source,python]
----
# prototype
hdata = weechat.hdata_get(hdata_name)

# example
hdata = weechat.hdata_get("irc_server")
----

==== hdata_get_var_offset

_WeeChat ≥ 0.3.6._

Return offset of variable in hdata.

Prototype:

[source,C]
----
int weechat_hdata_get_var_offset (struct t_hdata *hdata, const char *name);
----

Arguments:

* _hdata_: hdata pointer
* _name_: variable name

Return value:

* variable offset, 0 if an error occurred

C example:

[source,C]
----
int offset = weechat_hdata_get_var_offset (hdata, "name");
----

Script (Python):

[source,python]
----
# prototype
offset = weechat.hdata_get_var_offset(hdata, name)

# example
offset = weechat.hdata_get_var_offset(hdata, "name")
----

==== hdata_get_var_type

_WeeChat ≥ 0.3.6._

Return type of variable in hdata (as integer).

Prototype:

[source,C]
----
int weechat_hdata_get_var_type (struct t_hdata *hdata, const char *name);
----

Arguments:

* _hdata_: hdata pointer
* _name_: variable name

Return value:

* variable type, -1 if an error occurred

C example:

[source,C]
----
int type = weechat_hdata_get_var_type (hdata, "name");
switch (type)
{
    case WEECHAT_HDATA_CHAR:
        /* ... */
        break;
    case WEECHAT_HDATA_INTEGER:
        /* ... */
        break;
    case WEECHAT_HDATA_LONG:
        /* ... */
        break;
    case WEECHAT_HDATA_STRING:
        /* ... */
        break;
    case WEECHAT_HDATA_SHARED_STRING:
        /* ... */
        break;
    case WEECHAT_HDATA_POINTER:
        /* ... */
        break;
    case WEECHAT_HDATA_TIME:
        /* ... */
        break;
    case WEECHAT_HDATA_HASHTABLE:
        /* ... */
        break;
    case WEECHAT_HDATA_OTHER:
        /* ... */
        break;
    default:
        /* variable not found */
        break;
}
----

[NOTE]
This function is not available in scripting API.

==== hdata_get_var_type_string

_WeeChat ≥ 0.3.6._

Return type of variable in hdata (as string).

Prototype:

[source,C]
----
const char *weechat_hdata_get_var_type_string (struct t_hdata *hdata, const char *name);
----

Arguments:

* _hdata_: hdata pointer
* _name_: variable name

Return value:

* variable type, NULL if an error occurred

C example:

[source,C]
----
weechat_printf (NULL, "type = %s", weechat_hdata_get_var_type_string (hdata, "name"));
----

Script (Python):

[source,python]
----
# prototype
type = weechat.hdata_get_var_type_string(hdata, name)

# example
weechat.prnt("", "type = %s" % weechat.hdata_get_var_type_string("name"))
----

==== hdata_get_var_array_size

_WeeChat ≥ 0.3.9._

Return array size for variable in hdata.

Prototype:

[source,C]
----
int weechat_hdata_get_var_array_size (struct t_hdata *hdata, void *pointer, const char *name);
----

Arguments:

* _hdata_: hdata pointer
* _pointer_: pointer to WeeChat/plugin object
* _name_: variable name

Return value:

* array size for variable, -1 if variable is not an array or if an error occurred

C example:

[source,C]
----
int array_size = weechat_hdata_get_var_array_size (hdata, pointer, "name");
----

Script (Python):

[source,python]
----
# prototype
array_size = weechat.hdata_get_var_array_size(hdata, pointer, name)

# example
array_size = weechat.hdata_get_var_array_size(hdata, pointer, "name")
----

==== hdata_get_var_array_size_string

_WeeChat ≥ 0.3.9._

Return array size for variable in hdata (as string).

Prototype:

[source,C]
----
const char *weechat_hdata_get_var_array_size_string (struct t_hdata *hdata, void *pointer,
                                                     const char *name);
----

Arguments:

* _hdata_: hdata pointer
* _pointer_: pointer to WeeChat/plugin object
* _name_: variable name

Return value:

* array size for variable as string, NULL if variable is not an array or if an
  error occurred

C example:

[source,C]
----
const char *array_size = weechat_hdata_get_var_array_size_string (hdata, pointer, "name");
----

Script (Python):

[source,python]
----
# prototype
array_size = weechat.hdata_get_var_array_size_string(hdata, pointer, name)

# example
array_size = weechat.hdata_get_var_array_size_string(hdata, pointer, "name")
----

==== hdata_get_var_hdata

_WeeChat ≥ 0.3.6._

Return hdata for a variable in hdata.

Prototype:

[source,C]
----
const char *weechat_hdata_get_var_hdata (struct t_hdata *hdata, const char *name);
----

Arguments:

* _hdata_: hdata pointer
* _name_: variable name

Return value:

* hdata for variable, NULL if no hdata or if an error occurred

C example:

[source,C]
----
weechat_printf (NULL, "hdata = %s", weechat_hdata_get_var_hdata (hdata, "name"));
----

Script (Python):

[source,python]
----
# prototype
hdata_name = weechat.hdata_get_var_hdata(hdata, name)

# example
weechat.prnt("", "hdata = %s" % weechat.hdata_get_var_hdata(hdata, "name"))
----

==== hdata_get_var

_WeeChat ≥ 0.3.6._

Return pointer to content of variable in hdata.

Prototype:

[source,C]
----
void *weechat_hdata_get_var (struct t_hdata *hdata, void *pointer, const char *name);
----

Arguments:

* _hdata_: hdata pointer
* _pointer_: pointer to WeeChat/plugin object
* _name_: variable name

Return value:

* pointer to content of variable, NULL if an error occurred

C example:

[source,C]
----
struct t_hdata *hdata = weechat_hdata_get ("buffer");
struct t_gui_buffer *buffer = weechat_buffer_search_main ();
void *pointer = weechat_hdata_get_var (hdata, buffer, "name");
----

[NOTE]
This function is not available in scripting API.

==== hdata_get_var_at_offset

_WeeChat ≥ 0.3.6._

Return pointer to content of variable in hdata, using offset.

Prototype:

[source,C]
----
void *weechat_hdata_get_var_at_offset (struct t_hdata *hdata, void *pointer, int offset);
----

Arguments:

* _hdata_: hdata pointer
* _pointer_: pointer to WeeChat/plugin object
* _offset_: offset of variable

Return value:

* pointer to content of variable, NULL if an error occurred

C example:

[source,C]
----
struct t_hdata *hdata = weechat_hdata_get ("buffer");
struct t_gui_buffer *buffer = weechat_buffer_search_main ();
int offset = weechat_hdata_get_var_offset (hdata, "name");
void *pointer = weechat_hdata_get_var_at_offset (hdata, buffer, offset);
----

[NOTE]
This function is not available in scripting API.

==== hdata_get_list

_WeeChat ≥ 0.3.6._

Return list pointer from hdata.

Prototype:

[source,C]
----
void *weechat_hdata_get_list (struct t_hdata *hdata, const char *name);
----

Arguments:

* _hdata_: hdata pointer
* _name_: list name

Return value:

* list pointer, NULL if an error occurred

C example:

[source,C]
----
struct t_hdata *hdata = weechat_hdata_get ("buffer");
struct t_gui_buffer *buffers = weechat_hdata_get_list (hdata, "gui_buffers");
----

Script (Python):

[source,python]
----
# prototype
list = weechat.hdata_get_list(hdata, name)

# example
hdata = weechat.hdata_get("buffer")
buffers = weechat.hdata_get_list(hdata, "gui_buffers")
----

==== hdata_check_pointer

_WeeChat ≥ 0.3.7, updated in 1.0._

Check if a pointer is valid for a hdata and a list pointer.

Prototype:

[source,C]
----
int weechat_hdata_check_pointer (struct t_hdata *hdata, void *list, void *pointer);
----

Arguments:

* _hdata_: hdata pointer
* _list_: list pointer; if NULL _(WeeChat ≥ 1.0)_, the pointer is checked with
  the lists in hdata that have flag "check pointers" (see
  <<_hdata_new_list,hdata_new_list>>), and if no such list
  exists, the pointer is considered as valid
* _pointer_: pointer to check

Return value:

* 1 if pointer is in list, 0 if not found

C example:

[source,C]
----
/* check if a buffer pointer is valid */
struct t_hdata *hdata = weechat_hdata_get ("buffer");
if (weechat_hdata_check_pointer (hdata,
                                 weechat_hdata_get_list (hdata, "gui_buffers"),
                                 ptr_buffer))
{
    /* valid pointer */
}
else
{
    /* invalid pointer */
}
----

Script (Python):

[source,python]
----
# prototype
rc = weechat.hdata_check_pointer(hdata, list, pointer)

# example
hdata = weechat.hdata_get("buffer")
if weechat.hdata_check_pointer(hdata, weechat.hdata_get_list(hdata, "gui_buffers"), ptr_buffer):
    # valid pointer
    # ...
else:
    # invalid pointer
    # ...
----

==== hdata_move

_WeeChat ≥ 0.3.6._

Move pointer to another element in list.

Prototype:

[source,C]
----
void *weechat_hdata_move (struct t_hdata *hdata, void *pointer, int count);
----

Arguments:

* _hdata_: hdata pointer
* _pointer_: pointer to a WeeChat/plugin object
* _count_: number of jump(s) to execute (negative or positive integer, different
  from 0)

Return value:

* pointer to element reached, NULL if element is not found (for example end
  of list), or if an error occurred

C example:

[source,C]
----
struct t_hdata *hdata = weechat_hdata_get ("buffer");
struct t_gui_buffer *buffer = weechat_buffer_search_main ();

/* move to next buffer, 2 times */
buffer = weechat_hdata_move (hdata, buffer, 2);

/* move to previous buffer */
if (buffer)
    buffer = weechat_hdata_move (hdata, buffer, -1);
----

Script (Python):

[source,python]
----
# prototype
pointer = weechat.hdata_move(hdata, pointer, count)

# example
hdata = weechat.hdata_get("buffer")
buffer = weechat.buffer_search_main()

# move to next buffer, 2 times
buffer = weechat.hdata_move(hdata, buffer, 2)

# move to previous buffer
if buffer:
    buffer = weechat.hdata_move(hdata, buffer, -1)
----

==== hdata_search

_WeeChat ≥ 0.4.1._

Search element in a list: the expression _search_ is evaluated for each element
in list, until element is found (or end of list).

Prototype:

[source,C]
----
void *weechat_hdata_search (struct t_hdata *hdata, void *pointer, const char *search, int move);
----

Arguments:

* _hdata_: hdata pointer
* _pointer_: pointer to a WeeChat/plugin object
* _search_: expression to evaluate, default pointer in expression is the name of
  hdata (and this pointer changes for each element in list); for help on
  expression, see the
  link:weechat_user.en.html#command_weechat_eval[WeeChat user's guide / Command /eval]
* _move_: number of jump(s) to execute after unsuccessful search (negative or
  positive integer, different from 0)

Return value:

* pointer to element found, NULL if not found

C example:

[source,C]
----
struct t_hdata *hdata = weechat_hdata_get ("irc_server");
void *servers = weechat_hdata_get_list (hdata, "irc_servers");

/* search irc server with name "freenode" */
void *server = weechat_hdata_search (hdata, servers, "${irc_server.name} == freenode", 1);
if (server)
{
    /* ... */
}
----

Script (Python):

[source,python]
----
# prototype
pointer = weechat.hdata_search(hdata, pointer, search, count)

# example
hdata = weechat.hdata_get("irc_server")
servers = weechat.hdata_get_list(hdata, "irc_servers")

# search irc server with name "freenode"
server = weechat.hdata_search(hdata, servers, "${irc_server.name} == freenode", 1)
if server:
    # ...
----

==== hdata_char

_WeeChat ≥ 0.3.7._

Return value of char variable in structure using hdata.

Prototype:

[source,C]
----
char weechat_hdata_char (struct t_hdata *hdata, void *pointer, const char *name);
----

Arguments:

* _hdata_: hdata pointer
* _pointer_: pointer to WeeChat/plugin object
* _name_: variable name (must be type "char"); for arrays, the name can be
  "N|name" where N is the index in array (starting at 0), for example: "2|name"

Return value:

* char value of variable

C example:

[source,C]
----
weechat_printf (NULL, "letter = %c", weechat_hdata_char (hdata, pointer, "letter"));
----

Script (Python):

[source,python]
----
# prototype
value = weechat.hdata_char(hdata, pointer, name)

# example
weechat.prnt("", "letter = %c" % weechat.hdata_char(hdata, pointer, "letter"))
----

==== hdata_integer

_WeeChat ≥ 0.3.6._

Return value of integer variable in structure using hdata.

Prototype:

[source,C]
----
int weechat_hdata_integer (struct t_hdata *hdata, void *pointer, const char *name);
----

Arguments:

* _hdata_: hdata pointer
* _pointer_: pointer to WeeChat/plugin object
* _name_: variable name (must be type "integer"); for arrays, the name can be
  "N|name" where N is the index in array (starting at 0), for example: "2|name"

Return value:

* integer value of variable

C example:

[source,C]
----
struct t_hdata *hdata = weechat_hdata_get ("buffer");
struct t_gui_buffer *buffer = weechat_buffer_search_main ();
weechat_printf (NULL, "number = %d", weechat_hdata_integer (hdata, buffer, "number"));
----

Script (Python):

[source,python]
----
# prototype
value = weechat.hdata_integer(hdata, pointer, name)

# example
hdata = weechat.hdata_get("buffer")
buffer = weechat.buffer_search_main()
weechat.prnt("", "number = %d" % weechat.hdata_integer(hdata, buffer, "number"))
----

==== hdata_long

_WeeChat ≥ 0.3.6._

Return value of long variable in structure using hdata.

Prototype:

[source,C]
----
long weechat_hdata_long (struct t_hdata *hdata, void *pointer, const char *name);
----

Arguments:

* _hdata_: hdata pointer
* _pointer_: pointer to WeeChat/plugin object
* _name_: variable name (must be type "long"); for arrays, the name can be
  "N|name" where N is the index in array (starting at 0), for example: "2|name"

Return value:

* long value of variable

C example:

[source,C]
----
weechat_printf (NULL, "longvar = %ld", weechat_hdata_long (hdata, pointer, "longvar"));
----

Script (Python):

[source,python]
----
# prototype
value = weechat.hdata_long(hdata, pointer, name)

# example
weechat.prnt("", "longvar = %ld" % weechat.hdata_long(hdata, pointer, "longvar"))
----

==== hdata_string

_WeeChat ≥ 0.3.6._

Return value of string variable in structure using hdata.

Prototype:

[source,C]
----
const char *weechat_hdata_string (struct t_hdata *hdata, void *pointer, const char *name);
----

Arguments:

* _hdata_: hdata pointer
* _pointer_: pointer to WeeChat/plugin object
* _name_: variable name (must be type "string"); for arrays, the name can be
  "N|name" where N is the index in array (starting at 0), for example: "2|name"

Return value:

* string value of variable

C example:

[source,C]
----
struct t_hdata *hdata = weechat_hdata_get ("buffer");
struct t_gui_buffer *buffer = weechat_buffer_search_main ();
weechat_printf (NULL, "name = %s", weechat_hdata_string (hdata, buffer, "name"));
----

Script (Python):

[source,python]
----
# prototype
value = weechat.hdata_string(hdata, pointer, name)

# example
hdata = weechat.hdata_get("buffer")
buffer = weechat.buffer_search_main()
weechat.prnt("", "name = %s" % weechat.hdata_string(hdata, buffer, "name"))
----

==== hdata_pointer

_WeeChat ≥ 0.3.6._

Return value of pointer variable in structure using hdata.

Prototype:

[source,C]
----
void *weechat_hdata_pointer (struct t_hdata *hdata, void *pointer, const char *name);
----

Arguments:

* _hdata_: hdata pointer
* _pointer_: pointer to WeeChat/plugin object
* _name_: variable name (must be type "pointer"); for arrays, the name can be
  "N|name" where N is the index in array (starting at 0), for example: "2|name"

Return value:

* pointer value of variable

C example:

[source,C]
----
struct t_hdata *hdata = weechat_hdata_get ("buffer");
struct t_gui_buffer *buffer = weechat_buffer_search_main ();
weechat_printf (NULL, "lines = %lx", weechat_hdata_pointer (hdata, buffer, "lines"));
----

Script (Python):

[source,python]
----
# prototype
value = weechat.hdata_pointer(hdata, pointer, name)

# example
hdata = weechat.hdata_get("buffer")
buffer = weechat.buffer_search_main()
weechat.prnt("", "lines = %lx" % weechat.hdata_pointer(hdata, buffer, "lines"))
----

==== hdata_time

_WeeChat ≥ 0.3.6._

Return value of time variable in structure using hdata.

Prototype:

[source,C]
----
time_t weechat_hdata_time (struct t_hdata *hdata, void *pointer, const char *name);
----

Arguments:

* _hdata_: hdata pointer
* _pointer_: pointer to WeeChat/plugin object
* _name_: variable name (must be type "time"); for arrays, the name can be
  "N|name" where N is the index in array (starting at 0), for example: "2|name"

Return value:

* time value of variable

C example:

[source,C]
----
struct t_hdata *hdata = weechat_hdata_get ("buffer");
struct t_gui_buffer *ptr = weechat_buffer_search_main ();
ptr = weechat_hdata_pointer (hdata, ptr, "lines");
if (ptr)
{
    hdata = weechat_hdata_get ("lines");
    ptr = weechat_hdata_pointer (hdata, ptr, "first_line");
    if (ptr)
    {
        hdata = weechat_hdata_get ("line");
        ptr = weechat_hdata_pointer (hdata, ptr, "data");
        if (ptr)
        {
            hdata = weechat_hdata_get ("line_data");
            time_t date = weechat_hdata_time (hdata, hdata, "date");
            weechat_printf (NULL, "time of last line displayed = %s", ctime (&date));
        }
    }
}
----

Script (Python):

[source,python]
----
# prototype
value = weechat.hdata_time(hdata, pointer, name)

# example
buf = weechat.buffer_search_main()
ptr = weechat.hdata_pointer(weechat.hdata_get("buffer"), buf, "lines")
if ptr:
    ptr = weechat.hdata_pointer(weechat.hdata_get("lines"), ptr, "first_line")
    if ptr:
        ptr = weechat.hdata_pointer(weechat.hdata_get("line"), ptr, "data")
        if ptr:
            date = weechat.hdata_time(weechat.hdata_get("line_data"), ptr, "date")
            weechat.prnt("", "time of first line displayed = %s" % time.strftime("%F %T", time.localtime(int(date))))
----

==== hdata_hashtable

_WeeChat ≥ 0.3.7._

Return value of hashtable variable in structure using hdata.

Prototype:

[source,C]
----
struct t_hashtable *weechat_hdata_hashtable (struct t_hdata *hdata, void *pointer, const char *name);
----

Arguments:

* _hdata_: hdata pointer
* _pointer_: pointer to WeeChat/plugin object
* _name_: variable name (must be type "hashtable"); for arrays, the name can be
  "N|name" where N is the index in array (starting at 0), for example: "2|name"

Return value:

* hashtable value of variable (pointer to hashtable)

C example:

[source,C]
----
struct t_hdata *hdata = weechat_hdata_get ("buffer");
struct t_gui_buffer *buffer = weechat_buffer_search_main ();
struct t_hashtable *hashtable = weechat_hdata_hashtable (hdata, buffer, "local_variables");
weechat_printf (NULL, "%d local variables in core buffer",
                weechat_hashtable_get_integer (hashtable, "items_count"));
----

Script (Python):

[source,python]
----
# prototype
hashtable = weechat.hdata_hashtable(hdata, pointer, name)

# example
hdata = weechat.hdata_get("buffer")
buffer = weechat.buffer_search_main()
hash = weechat.hdata_hashtable(hdata, buffer, "local_variables")
weechat.prnt("", "local variables in core buffer:")
for key in hash:
    weechat.prnt("", "  %s == %s" % (key, hash[key]))
----

==== hdata_compare

_WeeChat ≥ 1.9._

Compare a hdata variable of two objects.

Prototype:

[source,C]
----
int weechat_hdata_compare (struct t_hdata *hdata, void *pointer1, void *pointer2, const char *name, int case_sensitive);
----

Arguments:

* _hdata_: hdata pointer
* _pointer1_: pointer to first WeeChat/plugin object
* _pointer2_: pointer to second WeeChat/plugin object
* _name_: variable name; for arrays, the name can be "N|name" where N is
  the index in array (starting at 0), for example: "2|name"
* _case_sensitive_: 1 for case sensitive comparison of strings, otherwise 0

Return value:

* -1 if variable1 < variable2
* 0 if variable1 == variable2
* 1 if variable1 > variable2

C example:

[source,C]
----
struct t_hdata *hdata = weechat_hdata_get ("buffer");
struct t_gui_buffer *buffer1 = weechat_buffer_search ("irc", "freenode.#weechat");
struct t_gui_buffer *buffer2 = weechat_buffer_search ("irc", "freenode.#weechat-fr");
weechat_printf (NULL, "number comparison = %d",
                weechat_hdata_compare (hdata, buffer1, buffer2, "number", 0));
----

Script (Python):

[source,python]
----
# prototype
rc = weechat.hdata_compare(hdata, pointer1, pointer2, name, case_sensitive)

# example
hdata = weechat.hdata_get("buffer")
buffer1 = weechat.buffer_search("irc", "freenode.#weechat")
buffer2 = weechat.buffer_search("irc", "freenode.#weechat-fr")
weechat.prnt("", "number comparison = %d" % weechat.hdata_compare(hdata, buffer1, buffer2, "number", 0))
----

==== hdata_set

_WeeChat ≥ 0.3.9._

Set new value for variable in a hdata.

[NOTE]
This function can be called only in an update callback
(see <<_hdata_new,hdata_new>> and <<_hdata_update,hdata_update>>),
if the variable can be updated.

Prototype:

[source,C]
----
int weechat_hdata_set (struct t_hdata *hdata, void *pointer, const char *name, const char *value);
----

Arguments:

* _hdata_: hdata pointer
* _pointer_: pointer to WeeChat/plugin object
* _name_: variable name (types allowed: char, integer, long, string, pointer,
  time)
* _value_: new value for variable

Return value:

* 1 if OK, 0 if error

C example:

[source,C]
----
weechat_hdata_set (hdata, pointer, "message", "test");
----

[NOTE]
This function is not available in scripting API.

==== hdata_update

_WeeChat ≥ 0.3.9._

Update data in a hdata.

Prototype:

[source,C]
----
int weechat_hdata_update (struct t_hdata *hdata, void *pointer, struct t_hashtable *hashtable);
----

Arguments:

* _hdata_: hdata pointer
* _pointer_: pointer to WeeChat/plugin object
* _hashtable_: variables to update: keys are name of variables, values are new
  values for variables (keys and values are string), some special keys are
  allowed:
** key `__create_allowed` (with any value): return 1 if create is allowed for
   structure, otherwise 0 _(WeeChat ≥ 0.4.0)_
** key `__delete_allowed` (with any value): return 1 if delete is allowed for
   structure, otherwise 0
** key `__update_allowed`, value is name of a variable: return 1 if update is
   allowed for this variable, otherwise 0
** key `__delete` (with any value): delete structure (if allowed)

Return value:

* number of variables updated

C example:

[source,C]
----
/* subtract one hour on last message displayed in current buffer */

struct t_gui_lines *own_lines;
struct t_gui_line *line;
struct t_gui_line_data *line_data;
struct t_hdata *hdata;
struct t_hashtable *hashtable;
char str_date[64];

own_lines = weechat_hdata_pointer (weechat_hdata_get ("buffer"), weechat_current_buffer (), "own_lines");
if (own_lines)
{
    line = weechat_hdata_pointer (weechat_hdata_get ("lines"), own_lines, "last_line");
    if (line)
    {
        line_data = weechat_hdata_pointer (weechat_hdata_get ("line"), line, "data");
        hdata = weechat_hdata_get ("line_data");
        hashtable = weechat_hashtable_new (8,
                                           WEECHAT_HASHTABLE_STRING,
                                           WEECHAT_HASHTABLE_STRING,
                                           NULL,
                                           NULL);
        if (hashtable)
        {
            snprintf (str_date, sizeof (str_date), "%ld", ((long int)weechat_hdata_time (hdata, line_data, "date")) - 3600);
            weechat_hashtable_set (hashtable, "date", str_date);
            weechat_hdata_update (hdata, line_data, hashtable);
            weechat_hashtable_free (hashtable);
        }
    }
}
----

Script (Python):

[source,python]
----
# prototype
count = weechat.hdata_update(hdata, pointer, hashtable)

# example: subtract one hour on last message displayed in current buffer
own_lines = weechat.hdata_pointer(weechat.hdata_get("buffer"), weechat.current_buffer(), "own_lines")
if own_lines:
    line = weechat.hdata_pointer(weechat.hdata_get("lines"), own_lines, "last_line")
    if line:
        line_data = weechat.hdata_pointer(weechat.hdata_get("line"), line, "data")
        hdata = weechat.hdata_get("line_data")
        weechat.hdata_update(hdata, line_data, {"date": str(weechat.hdata_time(hdata, line_data, "date") - 3600)})
----

==== hdata_get_string

_WeeChat ≥ 0.3.6._

Return string value of a hdata property.

Prototype:

[source,C]
----
const char *weechat_hdata_get_string (struct t_hdata *hdata, const char *property);
----

Arguments:

* _hdata_: hdata pointer
* _property_: property name:
** _var_keys_: string with list of keys for variables in hdata
   (format: "key1,key2,key3")
** _var_values_: string with list of values for variables in hdata
   (format: "value1,value2,value3")
** _var_keys_values_: string with list of keys and values for variables in hdata
   (format: "key1:value1,key2:value2,key3:value3")
** _var_prev_: name of variable in structure which is a pointer to previous
   element in list
** _var_next_: name of variable in structure which is a pointer to next
   element in list
** _list_keys_: string with list of keys for lists in hdata
   (format: "key1,key2,key3")
** _list_values_: string with list of values for lists in hdata
   (format: "value1,value2,value3")
** _list_keys_values_: string with list of keys and values for lists in hdata
   (format: "key1:value1,key2:value2,key3:value3")

Return value:

* string value of property

C example:

[source,C]
----
weechat_printf (NULL, "variables in hdata: %s", weechat_hdata_get_string (hdata, "var_keys"));
weechat_printf (NULL, "lists in hdata: %s", weechat_hdata_get_string (hdata, "list_keys"));
----

Script (Python):

[source,python]
----
# prototype
value = weechat.hdata_get_string(hdata, property)

# example
weechat.prnt("", "variables in hdata: %s" % weechat.hdata_get_string(hdata, "var_keys"))
weechat.prnt("", "lists in hdata: %s" % weechat.hdata_get_string(hdata, "list_keys"))
----

[[upgrade]]
=== Upgrade

Functions for upgrading WeeChat (command "/upgrade").

==== upgrade_new

_Updated in 1.5._

Create or read a file for upgrade.

Prototype:

[source,C]
----
struct t_upgrade_file *upgrade_file_new (const char *filename,
                                         int (*callback_read)(const void *pointer,
                                                              void *data,
                                                              struct t_upgrade_file *upgrade_file,
                                                              int object_id,
                                                              struct t_infolist *infolist),
                                         const void *callback_read_pointer,
                                         void *callback_read_data);
----

Arguments:

* _filename_: name of file (extension ".upgrade" is added to this name by
  WeeChat)
* _callback_read_: function called for each object read in upgrade file
  (if NULL, the upgrade file is opened in write mode), arguments and return
  value:
** _const void *pointer_: pointer
** _void *data_: pointer
** _struct t_upgrade_file *upgrade_file_: pointer to upgrade file
** _int object_id_: object id
** _struct t_infolist *infolist_: infolist with content of object
** return value:
*** _WEECHAT_RC_OK_
*** _WEECHAT_RC_ERROR_
* _callback_read_pointer_: pointer given to callback when it is called by
  WeeChat
* _callback_read_data_: pointer given to callback when it is called by WeeChat;
  if not NULL, it must have been allocated with malloc (or similar function)
  and it is automatically freed when the upgrade file is closed

Return value:

* pointer to upgrade file

C example:

[source,C]
----
struct t_upgrade_file *upgrade_file = weechat_upgrade_new ("my_file",
                                                           NULL, NULL, NULL);
----

Script (Python):

[source,python]
----
# prototype
upgrade_file = weechat.upgrade_new(filename, callback_read, callback_read_data)

# example
upgrade_file = weechat.upgrade_new("my_file", "", "")
----

==== upgrade_write_object

Write an object in upgrade file.

Prototype:

[source,C]
----
int weechat_upgrade_write_object (struct t_upgrade_file *upgrade_file,
                                  int object_id,
                                  struct t_infolist *infolist);
----

Arguments:

* _upgrade_file_: upgrade file pointer
* _object_id_: id for object
* _infolist_: infolist to write in file

Return value:

* 1 if OK, 0 if error

C example:

[source,C]
----
if (weechat_upgrade_write_object (upgrade_file, 1, &infolist))
{
    /* OK */
}
else
{
    /* error */
}
----

Script (Python):

[source,python]
----
# prototype
rc = weechat.upgrade_write_object(upgrade_file, object_id, infolist)

# example
weechat.upgrade_write_object(upgrade_file, 1, infolist)
----

==== upgrade_read

_Updated in 1.5._

Read an upgrade file.

Prototype:

[source,C]
----
int weechat_upgrade_read (struct t_upgrade_file *upgrade_file);
----

Arguments:

* _upgrade_file_: upgrade file pointer

Return value:

* 1 if OK, 0 if error

C example:

[source,C]
----
weechat_upgrade_read (upgrade_file);
----

Script (Python):

[source,python]
----
# prototype
rc = weechat.upgrade_read(upgrade_file)

# example
weechat.upgrade_read(upgrade_file)
----

==== upgrade_close

Close an upgrade file.

Prototype:

[source,C]
----
void weechat_upgrade_close (struct t_upgrade_file *upgrade_file);
----

Arguments:

* _upgrade_file_: upgrade file pointer

C example:

[source,C]
----
weechat_upgrade_close (upgrade_file);
----

Script (Python):

[source,python]
----
# prototype
weechat.upgrade_close(upgrade_file)

# example
weechat.upgrade_close(upgrade_file)
----
