Use of const for some functions returning "char *"

src/plugins/scripts/python/weechat-python.c

@@ -263,7 +263,8 @@ weechat_python_load (const char *filename)
     PyThreadState *python_current_interpreter;
     PyObject *weechat_module, *weechat_outputs, *weechat_dict;
     PyObject *python_path, *path;
-    char *w_home, *p_home;
+    const char *weechat_home;
+    char *p_home;
     int len;
     
     if ((fp = fopen (filename, "r")) == NULL)
@@ -315,14 +316,14 @@ weechat_python_load (const char *filename)
 
     /* adding $weechat_dir/python in $PYTHONPATH */    
     python_path = PySys_GetObject ("path");
-    w_home = weechat_info_get ("weechat_dir", "");
-    if (w_home)
+    weechat_home = weechat_info_get ("weechat_dir", "");
+    if (weechat_home)
     {
-        len = strlen (w_home) + 1 + strlen(PYTHON_PLUGIN_NAME) + 1;
+        len = strlen (weechat_home) + 1 + strlen(PYTHON_PLUGIN_NAME) + 1;
         p_home = malloc (len);
         if (p_home)
         {
-            snprintf (p_home, len, "%s/python", w_home);
+            snprintf (p_home, len, "%s/python", weechat_home);
             path = PyString_FromString (p_home);
             if (path != NULL)
             {

src/plugins/scripts/script-api.c

@@ -980,9 +980,9 @@ script_api_hook_info (struct t_weechat_plugin *weechat_plugin,
                       struct t_plugin_script *script,
                       const char *info_name,
                       const char *description,
-                      char *(*callback)(void *data,
-                                        const char *info_name,
-                                        const char *arguments),
+                      const char *(*callback)(void *data,
+                                              const char *info_name,
+                                              const char *arguments),
                       const char *function)
 {
     struct t_script_callback *new_script_callback;
@@ -1316,12 +1316,13 @@ script_api_command (struct t_weechat_plugin *weechat_plugin,
  *                               format in file is: plugin.script.option = value
  */
 
-char *
+const char *
 script_api_config_get_plugin (struct t_weechat_plugin *weechat_plugin,
                               struct t_plugin_script *script,
                               const char *option)
 {
-    char *option_fullname, *return_value;
+    char *option_fullname;
+    const char *return_value;
     
     option_fullname = malloc ((strlen (script->name) +
                                strlen (option) + 2));

src/plugins/scripts/script-api.h

@@ -180,9 +180,9 @@ extern struct t_hook *script_api_hook_info (struct t_weechat_plugin *weechat_plu
                                             struct t_plugin_script *script,
                                             const char *info_name,
                                             const char *description,
-                                            char *(*callback)(void *data,
-                                                              const char *info_name,
-                                                              const char *arguments),
+                                            const char *(*callback)(void *data,
+                                                                    const char *info_name,
+                                                                    const char *arguments),
                                             const char *function);
 extern struct t_hook *script_api_hook_infolist (struct t_weechat_plugin *weechat_plugin,
                                                 struct t_plugin_script *script,
@@ -227,9 +227,9 @@ extern void script_api_command (struct t_weechat_plugin *weechat_plugin,
                                 struct t_plugin_script *script,
                                 struct t_gui_buffer *buffer,
                                 const char *command);
-extern char *script_api_config_get_plugin (struct t_weechat_plugin *weechat_plugin,
-                                           struct t_plugin_script *script,
-                                           const char *option);
+extern const char *script_api_config_get_plugin (struct t_weechat_plugin *weechat_plugin,
+                                                 struct t_plugin_script *script,
+                                                 const char *option);
 extern int script_api_config_set_plugin (struct t_weechat_plugin *weechat_plugin,
                                          struct t_plugin_script *script,
                                          const char *option, const char *value);

src/plugins/scripts/script.c

@@ -44,7 +44,7 @@ int script_option_check_license = 0;
 void
 script_config_read (struct t_weechat_plugin *weechat_plugin)
 {
-    char *string;
+    const char *string;
     
     string = weechat_config_get_plugin (SCRIPT_OPTION_CHECK_LICENSE);
     if (!string)
@@ -210,7 +210,8 @@ void
 script_auto_load (struct t_weechat_plugin *weechat_plugin,
                   void (*callback)(void *data, const char *filename))
 {
-    char *dir_home, *dir_name;
+    const char *dir_home;
+    char *dir_name;
     int dir_length;
     
     /* build directory, adding WeeChat home */
@@ -258,7 +259,8 @@ char *
 script_search_full_name (struct t_weechat_plugin *weechat_plugin,
                          const char *filename)
 {
-    char *final_name, *dir_home, *dir_system;
+    char *final_name;
+    const char *dir_home, *dir_system;
     int length;
     struct stat st;