core: add pointer in some callbacks (closes #406)

This pointer is the first argument received by callbacks, and the
existing argument "data" is now automatically freed by WeeChat when the
object containing the callback is removed.

With this new pointer, the linked list of callbacks in scripts has been
removed. This will improve speed of scripts (using a lot of hooks),
reduce memory used by scripts and reduce time to unload scripts.

Following functions are affected in the C API:

* exec_on_files
* config_new
* config_new_section
* config_new_option
* hook_command
* hook_command_run
* hook_timer
* hook_fd
* hook_process
* hook_process_hashtable
* hook_connect
* hook_print
* hook_signal
* hook_hsignal
* hook_config
* hook_completion
* hook_modifier
* hook_info
* hook_info_hashtable
* hook_infolist
* hook_hdata
* hook_focus
* unhook_all_plugin
* buffer_new
* bar_item_new
* upgrade_new
* upgrade_read

src/plugins/trigger/trigger-callback.c

@@ -56,8 +56,7 @@ trigger_callback_irc_message_parse (const char *irc_message,
     hashtable_in = weechat_hashtable_new (32,
                                           WEECHAT_HASHTABLE_STRING,
                                           WEECHAT_HASHTABLE_STRING,
-                                          NULL,
-                                          NULL);
+                                          NULL, NULL);
     if (hashtable_in)
     {
         weechat_hashtable_set (hashtable_in, "message", irc_message);
@@ -187,8 +186,7 @@ trigger_callback_replace_regex (struct t_trigger *trigger,
         pointers = weechat_hashtable_new (32,
                                           WEECHAT_HASHTABLE_STRING,
                                           WEECHAT_HASHTABLE_POINTER,
-                                          NULL,
-                                          NULL);
+                                          NULL, NULL);
         if (!pointers)
             return;
         pointers_allocated = 1;
@@ -366,8 +364,9 @@ trigger_callback_execute (struct t_trigger *trigger,
  */
 
 int
-trigger_callback_signal_cb (void *data, const char *signal,
-                            const char *type_data, void *signal_data)
+trigger_callback_signal_cb (const void *pointer, void *data,
+                            const char *signal, const char *type_data,
+                            void *signal_data)
 {
     const char *ptr_signal_data;
     char str_data[128], *irc_server;
@@ -463,7 +462,8 @@ end:
  */
 
 int
-trigger_callback_hsignal_cb (void *data, const char *signal,
+trigger_callback_hsignal_cb (const void *pointer, void *data,
+                             const char *signal,
                              struct t_hashtable *hashtable)
 {
     const char *type_values;
@@ -510,8 +510,9 @@ end:
  */
 
 char *
-trigger_callback_modifier_cb (void *data, const char *modifier,
-                              const char *modifier_data, const char *string)
+trigger_callback_modifier_cb (const void *pointer, void *data,
+                              const char *modifier, const char *modifier_data,
+                              const char *string)
 {
     struct t_gui_buffer *buffer;
     const char *ptr_string;
@@ -691,7 +692,8 @@ end:
  */
 
 int
-trigger_callback_print_cb  (void *data, struct t_gui_buffer *buffer,
+trigger_callback_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)
@@ -766,7 +768,8 @@ end:
  */
 
 int
-trigger_callback_command_cb  (void *data, struct t_gui_buffer *buffer,
+trigger_callback_command_cb  (const void *pointer, void *data,
+                              struct t_gui_buffer *buffer,
                               int argc, char **argv, char **argv_eol)
 {
     char str_name[32];
@@ -799,7 +802,8 @@ end:
  */
 
 int
-trigger_callback_command_run_cb  (void *data, struct t_gui_buffer *buffer,
+trigger_callback_command_run_cb  (const void *pointer, void *data,
+                                  struct t_gui_buffer *buffer,
                                   const char *command)
 {
     TRIGGER_CALLBACK_CB_INIT(WEECHAT_RC_OK);
@@ -823,7 +827,8 @@ end:
  */
 
 int
-trigger_callback_timer_cb  (void *data, int remaining_calls)
+trigger_callback_timer_cb  (const void *pointer, void *data,
+                            int remaining_calls)
 {
     char str_temp[128];
     int i;
@@ -870,7 +875,8 @@ end:
  */
 
 int
-trigger_callback_config_cb  (void *data, const char *option, const char *value)
+trigger_callback_config_cb  (const void *pointer, void *data,
+                             const char *option, const char *value)
 {
     TRIGGER_CALLBACK_CB_INIT(WEECHAT_RC_OK);
 
@@ -892,7 +898,8 @@ end:
  */
 
 struct t_hashtable *
-trigger_callback_focus_cb (void *data, struct t_hashtable *info)
+trigger_callback_focus_cb (const void *pointer, void *data,
+                           struct t_hashtable *info)
 {
     const char *ptr_value;
     long unsigned int value;
@@ -936,8 +943,7 @@ trigger_callback_init ()
         32,
         WEECHAT_HASHTABLE_STRING,
         WEECHAT_HASHTABLE_STRING,
-        NULL,
-        NULL);
+        NULL, NULL);
     if (trigger_callback_hashtable_options_conditions)
     {
         weechat_hashtable_set (trigger_callback_hashtable_options_conditions,
@@ -948,8 +954,7 @@ trigger_callback_init ()
         32,
         WEECHAT_HASHTABLE_STRING,
         WEECHAT_HASHTABLE_STRING,
-        NULL,
-        NULL);
+        NULL, NULL);
 }
 
 /*