Add "const" keyword for some "char *" function arguments (core and plugins API)

16 files changed, 506 insertions, 503 deletions

diff --git a/src/plugins/scripts/lua/weechat-lua-api.c b/src/plugins/scripts/lua/weechat-lua-api.c
index 3dcec99de..add53f967 100644
--- a/src/plugins/scripts/lua/weechat-lua-api.c
+++ b/src/plugins/scripts/lua/weechat-lua-api.c
@@ -94,7 +94,7 @@ weechat_lua_api_register (lua_State *L)
     shutdown_func = lua_tostring (lua_current_interpreter, -2);
     charset = lua_tostring (lua_current_interpreter, -1);
     
-    if (script_search (weechat_lua_plugin, lua_scripts, (char *)name))
+    if (script_search (weechat_lua_plugin, lua_scripts, name))
     {
         weechat_printf (NULL,
                         weechat_gettext ("%s%s: unable to register script "
@@ -109,13 +109,13 @@ weechat_lua_api_register (lua_State *L)
                                      &lua_scripts,
                                      (lua_current_script_filename) ?
                                      lua_current_script_filename : "",
-                                     (char *)name,
-                                     (char *)author,
-                                     (char *)version,
-                                     (char *)license,
-                                     (char *)description,
-                                     (char *)shutdown_func,
-                                     (char *)charset);
+                                     name,
+                                     author,
+                                     version,
+                                     license,
+                                     description,
+                                     shutdown_func,
+                                     charset);
     if (lua_current_script)
     {
         weechat_printf (NULL,
@@ -163,7 +163,7 @@ weechat_lua_api_charset_set (lua_State *L)
     charset = lua_tostring (lua_current_interpreter, -1);
     
     script_api_charset_set (lua_current_script,
-                            (char *) charset);
+                            charset);
 
     LUA_RETURN_OK;
 }
@@ -202,7 +202,7 @@ weechat_lua_api_iconv_to_internal (lua_State *L)
     charset = lua_tostring (lua_current_interpreter, -2);
     string = lua_tostring (lua_current_interpreter, -1);
     
-    result = weechat_iconv_to_internal ((char *)charset, (char *)string);
+    result = weechat_iconv_to_internal (charset, string);
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -242,7 +242,7 @@ weechat_lua_api_iconv_from_internal (lua_State *L)
     charset = lua_tostring (lua_current_interpreter, -2);
     string = lua_tostring (lua_current_interpreter, -1);
     
-    result = weechat_iconv_from_internal ((char *)charset, (char *)string);
+    result = weechat_iconv_from_internal (charset, string);
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -279,7 +279,7 @@ weechat_lua_api_gettext (lua_State *L)
     
     string = lua_tostring (lua_current_interpreter, -1);
     
-    result = weechat_gettext ((char *)string);
+    result = weechat_gettext (string);
     
     LUA_RETURN_STRING(result);
 }
@@ -320,7 +320,7 @@ weechat_lua_api_ngettext (lua_State *L)
     plural = lua_tostring (lua_current_interpreter, -2);
     count = lua_tonumber (lua_current_interpreter, -1);
     
-    result = weechat_ngettext ((char *)single, (char *)plural, count);
+    result = weechat_ngettext (single, plural, count);
     
     LUA_RETURN_STRING(result);
 }
@@ -358,7 +358,7 @@ weechat_lua_api_mkdir_home (lua_State *L)
     directory = lua_tostring (lua_current_interpreter, -2);
     mode = lua_tonumber (lua_current_interpreter, -1);
     
-    if (weechat_mkdir_home ((char *)directory, mode))
+    if (weechat_mkdir_home (directory, mode))
         LUA_RETURN_OK;
     
     LUA_RETURN_OK;
@@ -397,7 +397,7 @@ weechat_lua_api_mkdir (lua_State *L)
     directory = lua_tostring (lua_current_interpreter, -2);
     mode = lua_tonumber (lua_current_interpreter, -1);
     
-    if (weechat_mkdir ((char *)directory, mode))
+    if (weechat_mkdir (directory, mode))
         LUA_RETURN_OK;
     
     LUA_RETURN_OK;
@@ -462,9 +462,9 @@ weechat_lua_api_list_add (lua_State *L)
     data = lua_tostring (lua_current_interpreter, -2);
     where = lua_tostring (lua_current_interpreter, -1);
     
-    result = script_ptr2str (weechat_list_add (script_str2ptr ((char *)weelist),
-                                               (char *)data,
-                                               (char *)where));
+    result = script_ptr2str (weechat_list_add (script_str2ptr (weelist),
+                                               data,
+                                               where));
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -503,8 +503,8 @@ weechat_lua_api_list_search (lua_State *L)
     weelist = lua_tostring (lua_current_interpreter, -2);
     data = lua_tostring (lua_current_interpreter, -1);
     
-    result = script_ptr2str (weechat_list_search (script_str2ptr ((char *)weelist),
-                                                  (char *)data));
+    result = script_ptr2str (weechat_list_search (script_str2ptr (weelist),
+                                                  data));
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -543,8 +543,8 @@ weechat_lua_api_list_casesearch (lua_State *L)
     weelist = lua_tostring (lua_current_interpreter, -2);
     data = lua_tostring (lua_current_interpreter, -1);
     
-    result = script_ptr2str (weechat_list_casesearch (script_str2ptr ((char *)weelist),
-                                                      (char *)data));
+    result = script_ptr2str (weechat_list_casesearch (script_str2ptr (weelist),
+                                                      data));
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -583,7 +583,7 @@ weechat_lua_api_list_get (lua_State *L)
     weelist = lua_tostring (lua_current_interpreter, -2);
     position = lua_tonumber (lua_current_interpreter, -1);
     
-    result = script_ptr2str (weechat_list_get (script_str2ptr ((char *)weelist),
+    result = script_ptr2str (weechat_list_get (script_str2ptr (weelist),
                                                position));
     
     LUA_RETURN_STRING_FREE(result);
@@ -622,8 +622,8 @@ weechat_lua_api_list_set (lua_State *L)
     item = lua_tostring (lua_current_interpreter, -2);
     new_value = lua_tostring (lua_current_interpreter, -1);
     
-    weechat_list_set (script_str2ptr ((char *)item),
-                      (char *)new_value);
+    weechat_list_set (script_str2ptr (item),
+                      new_value);
     
     LUA_RETURN_OK;
 }
@@ -660,7 +660,7 @@ weechat_lua_api_list_next (lua_State *L)
     
     item = lua_tostring (lua_current_interpreter, -1);
     
-    result = script_ptr2str (weechat_list_next (script_str2ptr ((char *)item)));
+    result = script_ptr2str (weechat_list_next (script_str2ptr (item)));
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -697,7 +697,7 @@ weechat_lua_api_list_prev (lua_State *L)
     
     item = lua_tostring (lua_current_interpreter, -1);
     
-    result = script_ptr2str (weechat_list_prev (script_str2ptr ((char *)item)));
+    result = script_ptr2str (weechat_list_prev (script_str2ptr (item)));
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -734,7 +734,7 @@ weechat_lua_api_list_string (lua_State *L)
     
     item = lua_tostring (lua_current_interpreter, -1);
     
-    result = weechat_list_string (script_str2ptr ((char *)item));
+    result = weechat_list_string (script_str2ptr (item));
     
     LUA_RETURN_STRING(result);
 }
@@ -770,7 +770,7 @@ weechat_lua_api_list_size (lua_State *L)
     
     weelist = lua_tostring (lua_current_interpreter, -1);
     
-    size = weechat_list_size (script_str2ptr ((char *)weelist));
+    size = weechat_list_size (script_str2ptr (weelist));
     
     LUA_RETURN_INT(size);
 }
@@ -808,8 +808,8 @@ weechat_lua_api_list_remove (lua_State *L)
     weelist = lua_tostring (lua_current_interpreter, -2);
     item = lua_tostring (lua_current_interpreter, -1);
     
-    weechat_list_remove (script_str2ptr ((char *)weelist),
-                         script_str2ptr ((char *)item));
+    weechat_list_remove (script_str2ptr (weelist),
+                         script_str2ptr (item));
     
     LUA_RETURN_OK;
 }
@@ -845,7 +845,7 @@ weechat_lua_api_list_remove_all (lua_State *L)
     
     weelist = lua_tostring (lua_current_interpreter, -1);
     
-    weechat_list_remove_all (script_str2ptr ((char *)weelist));
+    weechat_list_remove_all (script_str2ptr (weelist));
     
     LUA_RETURN_OK;
 }
@@ -881,7 +881,7 @@ weechat_lua_api_list_free (lua_State *L)
     
     weelist = lua_tostring (lua_current_interpreter, -1);
     
-    weechat_list_free (script_str2ptr ((char *)weelist));
+    weechat_list_free (script_str2ptr (weelist));
     
     LUA_RETURN_OK;
 }
@@ -962,9 +962,9 @@ weechat_lua_api_config_new (lua_State *L)
     
     result = script_ptr2str (script_api_config_new (weechat_lua_plugin,
                                                     lua_current_script,
-                                                    (char *)name,
+                                                    name,
                                                     &weechat_lua_api_config_reload_cb,
-                                                    (char *)function));
+                                                    function));
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -976,7 +976,7 @@ weechat_lua_api_config_new (lua_State *L)
 void
 weechat_lua_api_config_read_cb (void *data,
                                 struct t_config_file *config_file,
-                                char *option_name, char *value)
+                                const char *option_name, const char *value)
 {
     struct t_script_callback *script_callback;
     char *lua_argv[4];
@@ -987,8 +987,8 @@ weechat_lua_api_config_read_cb (void *data,
     if (script_callback->function && script_callback->function[0])
     {
         lua_argv[0] = script_ptr2str (config_file);
-        lua_argv[1] = option_name;
-        lua_argv[2] = value;
+        lua_argv[1] = (char *)option_name;
+        lua_argv[2] = (char *)value;
         lua_argv[3] = NULL;
         
         rc = (int *) weechat_lua_exec (script_callback->script,
@@ -1010,7 +1010,7 @@ weechat_lua_api_config_read_cb (void *data,
 void
 weechat_lua_api_config_section_write_cb (void *data,
                                          struct t_config_file *config_file,
-                                         char *section_name)
+                                         const char *section_name)
 {
     struct t_script_callback *script_callback;
     char *lua_argv[3];
@@ -1021,7 +1021,7 @@ weechat_lua_api_config_section_write_cb (void *data,
     if (script_callback->function && script_callback->function[0])
     {
         lua_argv[0] = script_ptr2str (config_file);
-        lua_argv[1] = section_name;
+        lua_argv[1] = (char *)section_name;
         lua_argv[2] = NULL;
         
         rc = (int *) weechat_lua_exec (script_callback->script,
@@ -1044,7 +1044,7 @@ weechat_lua_api_config_section_write_cb (void *data,
 void
 weechat_lua_api_config_section_write_default_cb (void *data,
                                                  struct t_config_file *config_file,
-                                                 char *section_name)
+                                                 const char *section_name)
 {
     struct t_script_callback *script_callback;
     char *lua_argv[3];
@@ -1055,7 +1055,7 @@ weechat_lua_api_config_section_write_default_cb (void *data,
     if (script_callback->function && script_callback->function[0])
     {
         lua_argv[0] = script_ptr2str (config_file);
-        lua_argv[1] = section_name;
+        lua_argv[1] = (char *)section_name;
         lua_argv[2] = NULL;
         
         rc = (int *) weechat_lua_exec (script_callback->script,
@@ -1078,8 +1078,8 @@ int
 weechat_lua_api_config_section_create_option_cb (void *data,
                                                  struct t_config_file *config_file,
                                                  struct t_config_section *section,
-                                                 char *option_name,
-                                                 char *value)
+                                                 const char *option_name,
+                                                 const char *value)
 {
     struct t_script_callback *script_callback;
     char *lua_argv[5];
@@ -1091,8 +1091,8 @@ weechat_lua_api_config_section_create_option_cb (void *data,
     {
         lua_argv[0] = script_ptr2str (config_file);
         lua_argv[1] = script_ptr2str (section);
-        lua_argv[2] = option_name;
-        lua_argv[3] = value;
+        lua_argv[2] = (char *)option_name;
+        lua_argv[3] = (char *)value;
         lua_argv[4] = NULL;
         
         rc = (int *) weechat_lua_exec (script_callback->script,
@@ -1167,18 +1167,18 @@ weechat_lua_api_config_new_section (lua_State *L)
     
     result = script_ptr2str (script_api_config_new_section (weechat_lua_plugin,
                                                             lua_current_script,
-                                                            script_str2ptr ((char *)config_file),
-                                                            (char *)name,
+                                                            script_str2ptr (config_file),
+                                                            name,
                                                             user_can_add_options,
                                                             user_can_delete_options,
                                                             &weechat_lua_api_config_read_cb,
-                                                            (char *)function_read,
+                                                            function_read,
                                                             &weechat_lua_api_config_section_write_cb,
-                                                            (char *)function_write,
+                                                            function_write,
                                                             &weechat_lua_api_config_section_write_default_cb,
-                                                            (char *)function_write_default,
+                                                            function_write_default,
                                                             &weechat_lua_api_config_section_create_option_cb,
-                                                            (char *)function_create_option));
+                                                            function_create_option));
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -1217,8 +1217,8 @@ weechat_lua_api_config_search_section (lua_State *L)
     config_file = lua_tostring (lua_current_interpreter, -2);
     section_name = lua_tostring (lua_current_interpreter, -1);
     
-    result = script_ptr2str (weechat_config_search_section (script_str2ptr ((char *)config_file),
-                                                            (char *)section_name));
+    result = script_ptr2str (weechat_config_search_section (script_str2ptr (config_file),
+                                                            section_name));
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -1303,17 +1303,17 @@ weechat_lua_api_config_new_option (lua_State *L)
     
     result = script_ptr2str (script_api_config_new_option (weechat_lua_plugin,
                                                            lua_current_script,
-                                                           script_str2ptr ((char *)config_file),
-                                                           script_str2ptr ((char *)section),
-                                                           (char *)name,
-                                                           (char *)type,
-                                                           (char *)description,
-                                                           (char *)string_values,
+                                                           script_str2ptr (config_file),
+                                                           script_str2ptr (section),
+                                                           name,
+                                                           type,
+                                                           description,
+                                                           string_values,
                                                            min,
                                                            max,
-                                                           (char *)default_value,
+                                                           default_value,
                                                            &weechat_lua_api_config_option_change_cb,
-                                                           (char *)function));
+                                                           function));
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -1354,9 +1354,9 @@ weechat_lua_api_config_search_option (lua_State *L)
     section = lua_tostring (lua_current_interpreter, -2);
     option_name = lua_tostring (lua_current_interpreter, -1);
     
-    result = script_ptr2str (weechat_config_search_option (script_str2ptr ((char *)config_file),
-                                                           script_str2ptr ((char *)section),
-                                                           (char *)option_name));
+    result = script_ptr2str (weechat_config_search_option (script_str2ptr (config_file),
+                                                           script_str2ptr (section),
+                                                           option_name));
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -1392,7 +1392,7 @@ weechat_lua_api_config_string_to_boolean (lua_State *L)
     
     text = lua_tostring (lua_current_interpreter, -1);
     
-    value = weechat_config_string_to_boolean ((char *)text);
+    value = weechat_config_string_to_boolean (text);
     
     LUA_RETURN_INT(value);
 }
@@ -1430,7 +1430,7 @@ weechat_lua_api_config_option_reset (lua_State *L)
     option = lua_tostring (lua_current_interpreter, -2);
     run_callback = lua_tonumber (lua_current_interpreter, -1);
     
-    rc = weechat_config_option_reset (script_str2ptr ((char *)option),
+    rc = weechat_config_option_reset (script_str2ptr (option),
                                       run_callback);
     
     LUA_RETURN_INT(rc);
@@ -1471,8 +1471,8 @@ weechat_lua_api_config_option_set (lua_State *L)
     new_value = lua_tostring (lua_current_interpreter, -2);
     run_callback = lua_tonumber (lua_current_interpreter, -1);
     
-    rc = weechat_config_option_set (script_str2ptr ((char *)option),
-                                    (char *)new_value,
+    rc = weechat_config_option_set (script_str2ptr (option),
+                                    new_value,
                                     run_callback);
     
     LUA_RETURN_INT(rc);
@@ -1511,8 +1511,8 @@ weechat_lua_api_config_option_rename (lua_State *L)
     option = lua_tostring (lua_current_interpreter, -2);
     new_name = lua_tostring (lua_current_interpreter, -1);
     
-    weechat_config_option_rename (script_str2ptr ((char *)option),
-                                  (char *)new_name);
+    weechat_config_option_rename (script_str2ptr (option),
+                                  new_name);
     
     LUA_RETURN_OK;
 }
@@ -1548,7 +1548,7 @@ weechat_lua_api_config_boolean (lua_State *L)
     
     option = lua_tostring (lua_current_interpreter, -1);
     
-    value = weechat_config_boolean (script_str2ptr ((char *)option));
+    value = weechat_config_boolean (script_str2ptr (option));
     
     LUA_RETURN_INT(value);
 }
@@ -1584,7 +1584,7 @@ weechat_lua_api_config_integer (lua_State *L)
     
     option = lua_tostring (lua_current_interpreter, -1);
     
-    value = weechat_config_integer (script_str2ptr ((char *)option));
+    value = weechat_config_integer (script_str2ptr (option));
     
     LUA_RETURN_INT(value);
 }
@@ -1621,7 +1621,7 @@ weechat_lua_api_config_string (lua_State *L)
     
     option = lua_tostring (lua_current_interpreter, -1);
     
-    value = weechat_config_string (script_str2ptr ((char *)option));
+    value = weechat_config_string (script_str2ptr (option));
     
     LUA_RETURN_STRING(value);
 }
@@ -1657,7 +1657,7 @@ weechat_lua_api_config_color (lua_State *L)
     
     option = lua_tostring (lua_current_interpreter, -1);
     
-    value = weechat_config_color (script_str2ptr ((char *)option));
+    value = weechat_config_color (script_str2ptr (option));
     
     LUA_RETURN_INT(value);
 }
@@ -1697,10 +1697,10 @@ weechat_lua_api_config_write_line (lua_State *L)
     option_name = lua_tostring (lua_current_interpreter, -2);
     value = lua_tostring (lua_current_interpreter, -1);
     
-    weechat_config_write_line (script_str2ptr ((char *)config_file),
-                               (char *)option_name,
+    weechat_config_write_line (script_str2ptr (config_file),
+                               option_name,
                                "%s",
-                               (char *)value);
+                               value);
     
     LUA_RETURN_OK;
 }
@@ -1736,7 +1736,7 @@ weechat_lua_api_config_write (lua_State *L)
     
     config_file = lua_tostring (lua_current_interpreter, -1);
     
-    rc = weechat_config_write (script_str2ptr ((char *)config_file));
+    rc = weechat_config_write (script_str2ptr (config_file));
     
     LUA_RETURN_INT(rc);
 }
@@ -1772,7 +1772,7 @@ weechat_lua_api_config_read (lua_State *L)
     
     config_file = lua_tostring (lua_current_interpreter, -1);
     
-    rc = weechat_config_read (script_str2ptr ((char *)config_file));
+    rc = weechat_config_read (script_str2ptr (config_file));
     
     LUA_RETURN_INT(rc);
 }
@@ -1808,7 +1808,7 @@ weechat_lua_api_config_reload (lua_State *L)
     
     config_file = lua_tostring (lua_current_interpreter, -1);
     
-    rc = weechat_config_reload (script_str2ptr ((char *)config_file));
+    rc = weechat_config_reload (script_str2ptr (config_file));
     
     LUA_RETURN_INT(rc);
 }
@@ -1846,7 +1846,7 @@ weechat_lua_api_config_free (lua_State *L)
     
     script_api_config_free (weechat_lua_plugin,
                             lua_current_script,
-                            script_str2ptr ((char *)config_file));
+                            script_str2ptr (config_file));
     
     LUA_RETURN_OK;
 }
@@ -1883,7 +1883,7 @@ weechat_lua_api_config_get (lua_State *L)
     
     option = lua_tostring (lua_current_interpreter, -1);
     
-    result = script_ptr2str (weechat_config_get ((char *)option));
+    result = script_ptr2str (weechat_config_get (option));
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -1922,7 +1922,7 @@ weechat_lua_api_config_get_plugin (lua_State *L)
     
     value = script_api_config_get_plugin (weechat_lua_plugin,
                                           lua_current_script,
-                                          (char *)option);
+                                          option);
     
     LUA_RETURN_STRING(value);
 }
@@ -1962,8 +1962,8 @@ weechat_lua_api_config_set_plugin (lua_State *L)
     
     if (script_api_config_set_plugin (weechat_lua_plugin,
                                       lua_current_script,
-                                      (char *)option,
-                                      (char *)value))
+                                      option,
+                                      value))
         LUA_RETURN_OK;
     
     LUA_RETURN_ERROR;
@@ -2001,7 +2001,7 @@ weechat_lua_api_prefix (lua_State *L)
     
     prefix = lua_tostring (lua_current_interpreter, -1);
     
-    result = weechat_prefix ((char *)prefix);
+    result = weechat_prefix (prefix);
     
     LUA_RETURN_STRING(result);
 }
@@ -2038,7 +2038,7 @@ weechat_lua_api_color (lua_State *L)
     
     color = lua_tostring (lua_current_interpreter, -1);
     
-    result = weechat_prefix ((char *)color);
+    result = weechat_prefix (color);
     
     LUA_RETURN_STRING(result);
 }
@@ -2078,8 +2078,8 @@ weechat_lua_api_print (lua_State *L)
     
     script_api_printf (weechat_lua_plugin,
                        lua_current_script,
-                       script_str2ptr ((char *)buffer),
-                       "%s", (char *)message);
+                       script_str2ptr (buffer),
+                       "%s", message);
     
     LUA_RETURN_OK;
 }
@@ -2124,10 +2124,10 @@ weechat_lua_api_print_date_tags (lua_State *L)
     
     script_api_printf_date_tags (weechat_lua_plugin,
                                  lua_current_script,
-                                 script_str2ptr ((char *)buffer),
+                                 script_str2ptr (buffer),
                                  date,
-                                 (char *)tags,
-                                 "%s", (char *)message);
+                                 tags,
+                                 "%s", message);
     
     LUA_RETURN_OK;
 }
@@ -2169,9 +2169,9 @@ weechat_lua_api_print_y (lua_State *L)
     
     script_api_printf_y (weechat_lua_plugin,
                          lua_current_script,
-                         script_str2ptr ((char *)buffer),
+                         script_str2ptr (buffer),
                          y,
-                         "%s", (char *)message);
+                         "%s", message);
     
     LUA_RETURN_OK;
 }
@@ -2214,9 +2214,9 @@ weechat_lua_api_infobar_print (lua_State *L)
     script_api_infobar_printf (weechat_lua_plugin,
                                lua_current_script,
                                delay,
-                               (char *)color,
+                               color,
                                "%s",
-                               (char *)message);
+                               message);
 
     LUA_RETURN_OK;
 }
@@ -2284,7 +2284,7 @@ weechat_lua_api_log_print (lua_State *L)
     
     script_api_log_printf (weechat_lua_plugin,
                            lua_current_script,
-                           "%s", (char *) message);
+                           "%s", message);
 
     LUA_RETURN_OK;
 }
@@ -2373,13 +2373,13 @@ weechat_lua_api_hook_command (lua_State *L)
     
     result = script_ptr2str (script_api_hook_command (weechat_lua_plugin,
                                                       lua_current_script,
-                                                      (char *)command,
-                                                      (char *)description,
-                                                      (char *)args,
-                                                      (char *)args_description,
-                                                      (char *)completion,
+                                                      command,
+                                                      description,
+                                                      args,
+                                                      args_description,
+                                                      completion,
                                                       &weechat_lua_api_hook_command_cb,
-                                                      (char *)function));
+                                                      function));
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -2459,7 +2459,7 @@ weechat_lua_api_hook_timer (lua_State *L)
                                                     align_second,
                                                     max_calls,
                                                     &weechat_lua_api_hook_timer_cb,
-                                                    (char *)function));
+                                                    function));
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -2542,7 +2542,7 @@ weechat_lua_api_hook_fd (lua_State *L)
                                                  write,
                                                  exception,
                                                  &weechat_lua_api_hook_fd_cb,
-                                                 (char *)function));
+                                                 function));
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -2554,7 +2554,7 @@ weechat_lua_api_hook_fd (lua_State *L)
 int
 weechat_lua_api_hook_print_cb (void *data, struct t_gui_buffer *buffer,
                                time_t date, int tags_count, char **tags,
-                               char *prefix, char *message)
+                               const char *prefix, const char *message)
 {
     struct t_script_callback *script_callback;
     char *lua_argv[6];
@@ -2571,8 +2571,8 @@ weechat_lua_api_hook_print_cb (void *data, struct t_gui_buffer *buffer,
     lua_argv[0] = script_ptr2str (buffer);
     lua_argv[1] = timebuffer;
     lua_argv[2] = weechat_string_build_with_exploded (tags, ",");
-    lua_argv[3] = prefix;
-    lua_argv[4] = message;
+    lua_argv[3] = (char *)prefix;
+    lua_argv[4] = (char *)message;
     lua_argv[5] = NULL;
     
     rc = (int *) weechat_lua_exec (script_callback->script,
@@ -2637,12 +2637,12 @@ weechat_lua_api_hook_print (lua_State *L)
     
     result = script_ptr2str (script_api_hook_print (weechat_lua_plugin,
                                                     lua_current_script,
-                                                    script_str2ptr ((char *)buffer),
-                                                    (char *)tags,
-                                                    (char *)message,
+                                                    script_str2ptr (buffer),
+                                                    tags,
+                                                    message,
                                                     strip_colors,
                                                     &weechat_lua_api_hook_print_cb,
-                                                    (char *)function));
+                                                    function));
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -2652,8 +2652,8 @@ weechat_lua_api_hook_print (lua_State *L)
  */
 
 int
-weechat_lua_api_hook_signal_cb (void *data, char *signal, char *type_data,
-                                void *signal_data)
+weechat_lua_api_hook_signal_cb (void *data, const char *signal,
+                                const char *type_data, void *signal_data)
 {
     struct t_script_callback *script_callback;
     char *lua_argv[3];
@@ -2662,7 +2662,7 @@ weechat_lua_api_hook_signal_cb (void *data, char *signal, char *type_data,
     
     script_callback = (struct t_script_callback *)data;
 
-    lua_argv[0] = signal;
+    lua_argv[0] = (char *)signal;
     free_needed = 0;
     if (strcmp (type_data, WEECHAT_HOOK_SIGNAL_STRING) == 0)
     {
@@ -2735,9 +2735,9 @@ weechat_lua_api_hook_signal (lua_State *L)
     
     result = script_ptr2str (script_api_hook_signal (weechat_lua_plugin,
                                                      lua_current_script,
-                                                     (char *)signal,
+                                                     signal,
                                                      &weechat_lua_api_hook_signal_cb,
-                                                     (char *)function));
+                                                     function));
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -2779,22 +2779,20 @@ weechat_lua_api_hook_signal_send (lua_State *L)
     if (strcmp (type_data, WEECHAT_HOOK_SIGNAL_STRING) == 0)
     {
         signal_data = lua_tostring (lua_current_interpreter, -1);
-        weechat_hook_signal_send ((char *)signal, (char *)type_data,
-                                  (char *)signal_data);
+        weechat_hook_signal_send (signal, type_data, (void *)signal_data);
         LUA_RETURN_OK;
     }
     else if (strcmp (type_data, WEECHAT_HOOK_SIGNAL_INT) == 0)
     {
         number = lua_tonumber (lua_current_interpreter, -1);
-        weechat_hook_signal_send ((char *)signal, (char *)type_data,
-                                  &number);
+        weechat_hook_signal_send (signal, type_data, &number);
         LUA_RETURN_OK;
     }
     else if (strcmp (type_data, WEECHAT_HOOK_SIGNAL_POINTER) == 0)
     {
         signal_data = lua_tostring (lua_current_interpreter, -1);
-        weechat_hook_signal_send ((char *)signal, (char *)type_data,
-                                  script_str2ptr ((char *)signal_data));
+        weechat_hook_signal_send (signal, type_data,
+                                  script_str2ptr (signal_data));
         LUA_RETURN_OK;
     }
     
@@ -2806,7 +2804,8 @@ weechat_lua_api_hook_signal_send (lua_State *L)
  */
 
 int
-weechat_lua_api_hook_config_cb (void *data, char *option, char *value)
+weechat_lua_api_hook_config_cb (void *data, const char *option,
+                                const char *value)
 {
     struct t_script_callback *script_callback;
     char *lua_argv[3];
@@ -2814,8 +2813,8 @@ weechat_lua_api_hook_config_cb (void *data, char *option, char *value)
     
     script_callback = (struct t_script_callback *)data;
     
-    lua_argv[0] = option;
-    lua_argv[1] = value;
+    lua_argv[0] = (char *)option;
+    lua_argv[1] = (char *)value;
     lua_argv[2] = NULL;
     
     rc = (int *) weechat_lua_exec (script_callback->script,
@@ -2871,9 +2870,9 @@ weechat_lua_api_hook_config (lua_State *L)
     
     result = script_ptr2str (script_api_hook_config (weechat_lua_plugin,
                                                      lua_current_script,
-                                                     (char *)option,
+                                                     option,
                                                      &weechat_lua_api_hook_config_cb,
-                                                     (char *)function));
+                                                     function));
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -2883,7 +2882,7 @@ weechat_lua_api_hook_config (lua_State *L)
  */
 
 int
-weechat_lua_api_hook_completion_cb (void *data, char *completion,
+weechat_lua_api_hook_completion_cb (void *data, const char *completion,
                                     struct t_gui_buffer *buffer,
                                     struct t_weelist *list)
 {
@@ -2893,7 +2892,7 @@ weechat_lua_api_hook_completion_cb (void *data, char *completion,
     
     script_callback = (struct t_script_callback *)data;
     
-    lua_argv[0] = completion;
+    lua_argv[0] = (char *)completion;
     lua_argv[1] = script_ptr2str (buffer);
     lua_argv[2] = script_ptr2str (list);
     lua_argv[3] = NULL;
@@ -2954,9 +2953,9 @@ weechat_lua_api_hook_completion (lua_State *L)
     
     result = script_ptr2str (script_api_hook_completion (weechat_lua_plugin,
                                                          lua_current_script,
-                                                         (char *)completion,
+                                                         completion,
                                                          &weechat_lua_api_hook_completion_cb,
-                                                         (char *)function));
+                                                         function));
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -2966,17 +2965,18 @@ weechat_lua_api_hook_completion (lua_State *L)
  */
 
 char *
-weechat_lua_api_hook_modifier_cb (void *data, char *modifier,
-                                  char *modifier_data, char *string)
+weechat_lua_api_hook_modifier_cb (void *data, const char *modifier,
+                                  const char *modifier_data,
+                                  const char *string)
 {
     struct t_script_callback *script_callback;
     char *lua_argv[4];
     
     script_callback = (struct t_script_callback *)data;
     
-    lua_argv[0] = modifier;
-    lua_argv[1] = modifier_data;
-    lua_argv[2] = string;
+    lua_argv[0] = (char *)modifier;
+    lua_argv[1] = (char *)modifier_data;
+    lua_argv[2] = (char *)string;
     lua_argv[3] = NULL;
     
     return (char *)weechat_lua_exec (script_callback->script,
@@ -3021,9 +3021,9 @@ weechat_lua_api_hook_modifier (lua_State *L)
     
     result = script_ptr2str (script_api_hook_modifier (weechat_lua_plugin,
                                                        lua_current_script,
-                                                       (char *)modifier,
+                                                       modifier,
                                                        &weechat_lua_api_hook_modifier_cb,
-                                                       (char *)function));
+                                                       function));
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -3064,9 +3064,7 @@ weechat_lua_api_hook_modifier_exec (lua_State *L)
     modifier_data = lua_tostring (lua_current_interpreter, -2);
     string = lua_tostring (lua_current_interpreter, -1);
     
-    result = weechat_hook_modifier_exec ((char *)modifier,
-                                         (char *)modifier_data,
-                                         (char *)string);
+    result = weechat_hook_modifier_exec (modifier, modifier_data, string);
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -3104,7 +3102,7 @@ weechat_lua_api_unhook (lua_State *L)
     
     script_api_unhook (weechat_lua_plugin,
                        lua_current_script,
-                       script_str2ptr ((char *)hook));
+                       script_str2ptr (hook));
     
     LUA_RETURN_OK;
 }
@@ -3136,7 +3134,7 @@ weechat_lua_api_unhook_all (lua_State *L)
 
 int
 weechat_lua_api_buffer_input_data_cb (void *data, struct t_gui_buffer *buffer,
-                                      char *input_data)
+                                      const char *input_data)
 {
     struct t_script_callback *script_callback;
     char *lua_argv[3];
@@ -3145,7 +3143,7 @@ weechat_lua_api_buffer_input_data_cb (void *data, struct t_gui_buffer *buffer,
     script_callback = (struct t_script_callback *)data;
     
     lua_argv[0] = script_ptr2str (buffer);
-    lua_argv[1] = input_data;
+    lua_argv[1] = (char *)input_data;
     lua_argv[2] = NULL;
     
     rc = (int *) weechat_lua_exec (script_callback->script,
@@ -3240,12 +3238,12 @@ weechat_lua_api_buffer_new (lua_State *L)
     
     result = script_ptr2str (script_api_buffer_new (weechat_lua_plugin,
                                                     lua_current_script,
-                                                    (char *)category,
-                                                    (char *)name,
+                                                    category,
+                                                    name,
                                                     &weechat_lua_api_buffer_input_data_cb,
-                                                    (char *)function_input,
+                                                    function_input,
                                                     &weechat_lua_api_buffer_close_cb,
-                                                    (char *)function_close));
+                                                    function_close));
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -3284,8 +3282,8 @@ weechat_lua_api_buffer_search (lua_State *L)
     category = lua_tostring (lua_current_interpreter, -2);
     name = lua_tostring (lua_current_interpreter, -1);
     
-    result = script_ptr2str (weechat_buffer_search ((char *)category,
-                                                    (char *)name));
+    result = script_ptr2str (weechat_buffer_search (category,
+                                                    name));
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -3321,7 +3319,7 @@ weechat_lua_api_buffer_clear (lua_State *L)
     
     buffer = lua_tostring (lua_current_interpreter, -1);
     
-    weechat_buffer_clear (script_str2ptr ((char *)buffer));
+    weechat_buffer_clear (script_str2ptr (buffer));
     
     LUA_RETURN_OK;
 }
@@ -3361,7 +3359,7 @@ weechat_lua_api_buffer_close (lua_State *L)
     
     script_api_buffer_close (weechat_lua_plugin,
                              lua_current_script,
-                             script_str2ptr ((char *)buffer),
+                             script_str2ptr (buffer),
                              switch_to_another);
     
     LUA_RETURN_OK;
@@ -3401,8 +3399,8 @@ weechat_lua_api_buffer_get_string (lua_State *L)
     buffer = lua_tostring (lua_current_interpreter, -2);
     property = lua_tostring (lua_current_interpreter, -1);
     
-    value = weechat_buffer_get_string (script_str2ptr ((char *)buffer),
-                                       (char *)property);
+    value = weechat_buffer_get_string (script_str2ptr (buffer),
+                                       property);
     
     LUA_RETURN_STRING(value);
 }
@@ -3441,8 +3439,8 @@ weechat_lua_api_buffer_get_pointer (lua_State *L)
     buffer = lua_tostring (lua_current_interpreter, -2);
     property = lua_tostring (lua_current_interpreter, -1);
     
-    value = script_ptr2str (weechat_buffer_get_string (script_str2ptr ((char *)buffer),
-                                                       (char *)property));
+    value = script_ptr2str (weechat_buffer_get_string (script_str2ptr (buffer),
+                                                       property));
     
     LUA_RETURN_STRING_FREE(value);
 }
@@ -3481,9 +3479,7 @@ weechat_lua_api_buffer_set (lua_State *L)
     property = lua_tostring (lua_current_interpreter, -2);
     value = lua_tostring (lua_current_interpreter, -1);
     
-    weechat_buffer_set (script_str2ptr ((char *)buffer),
-                        (char *)property,
-                        (char *)value);
+    weechat_buffer_set (script_str2ptr (buffer), property, value);
     
     LUA_RETURN_OK;
 }
@@ -3528,10 +3524,10 @@ weechat_lua_api_nicklist_add_group (lua_State *L)
     color = lua_tostring (lua_current_interpreter, -2);
     visible = lua_tonumber (lua_current_interpreter, -1);
     
-    result = script_ptr2str (weechat_nicklist_add_group (script_str2ptr ((char *)buffer),
-                                                         script_str2ptr ((char *)parent_group),
-                                                         (char *)name,
-                                                         (char *)color,
+    result = script_ptr2str (weechat_nicklist_add_group (script_str2ptr (buffer),
+                                                         script_str2ptr (parent_group),
+                                                         name,
+                                                         color,
                                                          visible));
     
     LUA_RETURN_STRING_FREE(result);
@@ -3573,9 +3569,9 @@ weechat_lua_api_nicklist_search_group (lua_State *L)
     from_group = lua_tostring (lua_current_interpreter, -2);
     name = lua_tostring (lua_current_interpreter, -1);
     
-    result = script_ptr2str (weechat_nicklist_search_group (script_str2ptr ((char *)buffer),
-                                                            script_str2ptr ((char *)from_group),
-                                                            (char *)name));
+    result = script_ptr2str (weechat_nicklist_search_group (script_str2ptr (buffer),
+                                                            script_str2ptr (from_group),
+                                                            name));
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -3629,12 +3625,12 @@ weechat_lua_api_nicklist_add_nick (lua_State *L)
     else
         char_prefix = ' ';
     
-    result = script_ptr2str (weechat_nicklist_add_nick (script_str2ptr ((char *)buffer),
-                                                        script_str2ptr ((char *)group),
-                                                        (char *)name,
-                                                        (char *)color,
+    result = script_ptr2str (weechat_nicklist_add_nick (script_str2ptr (buffer),
+                                                        script_str2ptr (group),
+                                                        name,
+                                                        color,
                                                         char_prefix,
-                                                        (char *)prefix_color,
+                                                        prefix_color,
                                                         visible));
     
     LUA_RETURN_STRING_FREE(result);
@@ -3676,9 +3672,9 @@ weechat_lua_api_nicklist_search_nick (lua_State *L)
     from_group = lua_tostring (lua_current_interpreter, -2);
     name = lua_tostring (lua_current_interpreter, -1);
     
-    result = script_ptr2str (weechat_nicklist_search_nick (script_str2ptr ((char *)buffer),
-                                                           script_str2ptr ((char *)from_group),
-                                                           (char *)name));
+    result = script_ptr2str (weechat_nicklist_search_nick (script_str2ptr (buffer),
+                                                           script_str2ptr (from_group),
+                                                           name));
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -3716,8 +3712,8 @@ weechat_lua_api_nicklist_remove_group (lua_State *L)
     buffer = lua_tostring (lua_current_interpreter, -3);
     group = lua_tostring (lua_current_interpreter, -2);
     
-    weechat_nicklist_remove_group (script_str2ptr ((char *)buffer),
-                                   script_str2ptr ((char *)group));
+    weechat_nicklist_remove_group (script_str2ptr (buffer),
+                                   script_str2ptr (group));
     
     LUA_RETURN_OK;
 }
@@ -3755,8 +3751,8 @@ weechat_lua_api_nicklist_remove_nick (lua_State *L)
     buffer = lua_tostring (lua_current_interpreter, -3);
     nick = lua_tostring (lua_current_interpreter, -2);
     
-    weechat_nicklist_remove_nick (script_str2ptr ((char *)buffer),
-                                  script_str2ptr ((char *)nick));
+    weechat_nicklist_remove_nick (script_str2ptr (buffer),
+                                  script_str2ptr (nick));
     
     LUA_RETURN_OK;
 }
@@ -3792,7 +3788,7 @@ weechat_lua_api_nicklist_remove_all (lua_State *L)
     
     buffer = lua_tostring (lua_current_interpreter, -3);
     
-    weechat_nicklist_remove_all (script_str2ptr ((char *)buffer));
+    weechat_nicklist_remove_all (script_str2ptr (buffer));
     
     LUA_RETURN_OK;
 }
@@ -3829,7 +3825,7 @@ weechat_lua_api_bar_item_search (lua_State *L)
     
     name = lua_tostring (lua_current_interpreter, -1);
     
-    result = script_ptr2str (weechat_bar_item_search ((char *)name));
+    result = script_ptr2str (weechat_bar_item_search (name));
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -3907,9 +3903,9 @@ weechat_lua_api_bar_item_new (lua_State *L)
     
     result = script_ptr2str (script_api_bar_item_new (weechat_lua_plugin,
                                                       lua_current_script,
-                                                      (char *)name,
+                                                      name,
                                                       &weechat_lua_api_bar_item_build_cb,
-                                                      (char *)function));
+                                                      function));
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -3945,7 +3941,7 @@ weechat_lua_api_bar_item_update (lua_State *L)
     
     name = lua_tostring (lua_current_interpreter, -1);
     
-    weechat_bar_item_update ((char *)name);
+    weechat_bar_item_update (name);
     
     LUA_RETURN_OK;
 }
@@ -3983,7 +3979,7 @@ weechat_lua_api_bar_item_remove (lua_State *L)
     
     script_api_bar_item_remove (weechat_lua_plugin,
                                 lua_current_script,
-                                script_str2ptr ((char *)item));
+                                script_str2ptr (item));
     
     LUA_RETURN_OK;
 }
@@ -4020,7 +4016,7 @@ weechat_lua_api_bar_search (lua_State *L)
     
     name = lua_tostring (lua_current_interpreter, -1);
     
-    result = script_ptr2str (weechat_bar_search ((char *)name));
+    result = script_ptr2str (weechat_bar_search (name));
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -4080,18 +4076,18 @@ weechat_lua_api_bar_new (lua_State *L)
     separator = lua_tostring (lua_current_interpreter, -2);
     items = lua_tostring (lua_current_interpreter, -1);
     
-    result = script_ptr2str (weechat_bar_new ((char *)name,
-                                              (char *)priority,
-                                              (char *)type,
-                                              (char *)conditions,
-                                              (char *)position,
-                                              (char *)filling,
-                                              (char *)size,
-                                              (char *)size_max,
-                                              (char *)color_fg,
-                                              (char *)color_bg,
-                                              (char *)separator,
-                                              (char *)items));
+    result = script_ptr2str (weechat_bar_new (name,
+                                              priority,
+                                              type,
+                                              conditions,
+                                              position,
+                                              filling,
+                                              size,
+                                              size_max,
+                                              color_fg,
+                                              color_bg,
+                                              separator,
+                                              items));
     
     LUA_RETURN_STRING_FREE(result);
 }
@@ -4130,9 +4126,9 @@ weechat_lua_api_bar_set (lua_State *L)
     property = lua_tostring (lua_current_interpreter, -2);
     value = lua_tostring (lua_current_interpreter, -1);
     
-    weechat_buffer_set (script_str2ptr ((char *)bar),
-                        (char *)property,
-                        (char *)value);
+    weechat_buffer_set (script_str2ptr (bar),
+                        property,
+                        value);
     
     LUA_RETURN_OK;
 }
@@ -4168,7 +4164,7 @@ weechat_lua_api_bar_update (lua_State *L)
     
     name = lua_tostring (lua_current_interpreter, -1);
     
-    weechat_bar_update ((char *)name);
+    weechat_bar_update (name);
     
     LUA_RETURN_OK;
 }
@@ -4204,7 +4200,7 @@ weechat_lua_api_bar_remove (lua_State *L)
     
     bar = lua_tostring (lua_current_interpreter, -1);
     
-    weechat_bar_remove (script_str2ptr ((char *)bar));
+    weechat_bar_remove (script_str2ptr (bar));
     
     LUA_RETURN_OK;
 }
@@ -4244,8 +4240,8 @@ weechat_lua_api_command (lua_State *L)
     
     script_api_command (weechat_lua_plugin,
                         lua_current_script,
-                        script_str2ptr ((char *)buffer),
-                        (char *)command);
+                        script_str2ptr (buffer),
+                        command);
 
     LUA_RETURN_OK;
 }
@@ -4282,7 +4278,7 @@ weechat_lua_api_info_get (lua_State *L)
 
     info = lua_tostring (lua_current_interpreter, -1);
     
-    value = weechat_info_get ((char *)info);
+    value = weechat_info_get (info);
     
     LUA_RETURN_STRING(value);
 }
@@ -4323,9 +4319,9 @@ weechat_lua_api_infolist_get (lua_State *L)
     pointer = lua_tostring (lua_current_interpreter, -2);
     arguments = lua_tostring (lua_current_interpreter, -1);
     
-    value = script_ptr2str (weechat_infolist_get ((char *)name,
-                                                  script_str2ptr ((char *)pointer),
-                                                  (char *)arguments));
+    value = script_ptr2str (weechat_infolist_get (name,
+                                                  script_str2ptr (pointer),
+                                                  arguments));
     
     LUA_RETURN_STRING_FREE(value);
 }
@@ -4361,7 +4357,7 @@ weechat_lua_api_infolist_next (lua_State *L)
     
     infolist = lua_tostring (lua_current_interpreter, -1);
     
-    value = weechat_infolist_next (script_str2ptr ((char *)infolist));
+    value = weechat_infolist_next (script_str2ptr (infolist));
     
     LUA_RETURN_INT(value);
 }
@@ -4397,7 +4393,7 @@ weechat_lua_api_infolist_prev (lua_State *L)
     
     infolist = lua_tostring (lua_current_interpreter, -1);
     
-    value = weechat_infolist_prev (script_str2ptr ((char *)infolist));
+    value = weechat_infolist_prev (script_str2ptr (infolist));
     
     LUA_RETURN_INT(value);
 }
@@ -4434,7 +4430,7 @@ weechat_lua_api_infolist_fields (lua_State *L)
     
     infolist = lua_tostring (lua_current_interpreter, -1);
     
-    value = weechat_infolist_fields (script_str2ptr ((char *)infolist));
+    value = weechat_infolist_fields (script_str2ptr (infolist));
     
     LUA_RETURN_STRING(value);
 }
@@ -4472,8 +4468,8 @@ weechat_lua_api_infolist_integer (lua_State *L)
     infolist = lua_tostring (lua_current_interpreter, -2);
     variable = lua_tostring (lua_current_interpreter, -1);
     
-    value = weechat_infolist_integer (script_str2ptr ((char *)infolist),
-                                      (char *)variable);
+    value = weechat_infolist_integer (script_str2ptr (infolist),
+                                      variable);
     
     LUA_RETURN_INT(value);
 }
@@ -4512,8 +4508,8 @@ weechat_lua_api_infolist_string (lua_State *L)
     infolist = lua_tostring (lua_current_interpreter, -2);
     variable = lua_tostring (lua_current_interpreter, -1);
     
-    value = weechat_infolist_string (script_str2ptr ((char *)infolist),
-                                     (char *)variable);
+    value = weechat_infolist_string (script_str2ptr (infolist),
+                                     variable);
     
     LUA_RETURN_STRING(value);
 }
@@ -4552,8 +4548,8 @@ weechat_lua_api_infolist_pointer (lua_State *L)
     infolist = lua_tostring (lua_current_interpreter, -2);
     variable = lua_tostring (lua_current_interpreter, -1);
     
-    value = script_ptr2str (weechat_infolist_pointer (script_str2ptr ((char *)infolist),
-                                                      (char *)variable));
+    value = script_ptr2str (weechat_infolist_pointer (script_str2ptr (infolist),
+                                                      variable));
     
     LUA_RETURN_STRING_FREE(value);
 }
@@ -4593,8 +4589,8 @@ weechat_lua_api_infolist_time (lua_State *L)
     infolist = lua_tostring (lua_current_interpreter, -2);
     variable = lua_tostring (lua_current_interpreter, -1);
     
-    time = weechat_infolist_time (script_str2ptr ((char *)infolist),
-                                  (char *)variable);
+    time = weechat_infolist_time (script_str2ptr (infolist),
+                                  variable);
     strftime (timebuffer, sizeof (timebuffer), "%F %T", localtime (&time));
     value = strdup (timebuffer);
     
@@ -4632,7 +4628,7 @@ weechat_lua_api_infolist_free (lua_State *L)
     
     infolist = lua_tostring (lua_current_interpreter, -1);
     
-    weechat_infolist_free (script_str2ptr ((char *)infolist));
+    weechat_infolist_free (script_str2ptr (infolist));
     
     LUA_RETURN_OK;
 }
diff --git a/src/plugins/scripts/lua/weechat-lua.c b/src/plugins/scripts/lua/weechat-lua.c
index f6ca6a6e9..6759dbe87 100644
--- a/src/plugins/scripts/lua/weechat-lua.c
+++ b/src/plugins/scripts/lua/weechat-lua.c
@@ -43,7 +43,7 @@ struct t_weechat_plugin *weechat_lua_plugin;
 
 struct t_plugin_script *lua_scripts = NULL;
 struct t_plugin_script *lua_current_script = NULL;
-char *lua_current_script_filename = NULL;
+const char *lua_current_script_filename = NULL;
 lua_State *lua_current_interpreter = NULL;
 
 
@@ -53,7 +53,7 @@ lua_State *lua_current_interpreter = NULL;
 
 void *
 weechat_lua_exec (struct t_plugin_script *script,
-		  int ret_type, char *function, char **argv)
+		  int ret_type, const char *function, char **argv)
 {
     void *ret_value;
     int argc, *ret_i;
@@ -127,7 +127,7 @@ weechat_lua_exec (struct t_plugin_script *script,
 }
 
 int
-weechat_lua_load (char *filename)
+weechat_lua_load (const char *filename)
 {
     FILE *fp;
     char *weechat_lua_code = {
@@ -247,7 +247,7 @@ weechat_lua_load (char *filename)
  */
 
 int
-weechat_lua_load_cb (void *data, char *filename)
+weechat_lua_load_cb (void *data, const char *filename)
 {
     /* make C compiler happy */
     (void) data;
@@ -292,7 +292,7 @@ weechat_lua_unload (struct t_plugin_script *script)
  */
 
 void
-weechat_lua_unload_name (char *name)
+weechat_lua_unload_name (const char *name)
 {
     struct t_plugin_script *ptr_script;
     
@@ -413,7 +413,7 @@ weechat_lua_command_cb (void *data, struct t_gui_buffer *buffer,
  */
 
 int
-weechat_lua_completion_cb (void *data, char *completion,
+weechat_lua_completion_cb (void *data, const char *completion,
                            struct t_gui_buffer *buffer,
                            struct t_weelist *list)
 {
@@ -432,7 +432,7 @@ weechat_lua_completion_cb (void *data, char *completion,
  */
 
 int
-weechat_lua_debug_dump_cb (void *data, char *signal, char *type_data,
+weechat_lua_debug_dump_cb (void *data, const char *signal, const char *type_data,
                            void *signal_data)
 {
     /* make C compiler happy */
@@ -451,7 +451,7 @@ weechat_lua_debug_dump_cb (void *data, char *signal, char *type_data,
  */
 
 int
-weechat_lua_buffer_closed_cb (void *data, char *signal, char *type_data,
+weechat_lua_buffer_closed_cb (void *data, const char *signal, const char *type_data,
                                void *signal_data)
 {
     /* make C compiler happy */
diff --git a/src/plugins/scripts/lua/weechat-lua.h b/src/plugins/scripts/lua/weechat-lua.h
index 2630fa99d..020ef5a5f 100644
--- a/src/plugins/scripts/lua/weechat-lua.h
+++ b/src/plugins/scripts/lua/weechat-lua.h
@@ -26,10 +26,11 @@ extern struct t_weechat_plugin *weechat_lua_plugin;
 
 extern struct t_plugin_script *lua_scripts;
 extern struct t_plugin_script *lua_current_script;
-extern char *lua_current_script_filename;
+extern const char *lua_current_script_filename;
 extern lua_State *lua_current_interpreter;
 
-extern void * weechat_lua_exec (struct t_plugin_script *script,
-                                int ret_type, char *function, char **argv);
+extern void *weechat_lua_exec (struct t_plugin_script *script,
+                               int ret_type, const char *function,
+                               char **argv);
 
 #endif /* weechat-lua.h */
diff --git a/src/plugins/scripts/perl/weechat-perl-api.c b/src/plugins/scripts/perl/weechat-perl-api.c
index d985e9854..1a429bd08 100644
--- a/src/plugins/scripts/perl/weechat-perl-api.c
+++ b/src/plugins/scripts/perl/weechat-perl-api.c
@@ -803,7 +803,7 @@ static XS (XS_weechat_config_new)
 void
 weechat_perl_api_config_section_read_cb (void *data,
                                          struct t_config_file *config_file,
-                                         char *option_name, char *value)
+                                         const char *option_name, const char *value)
 {
     struct t_script_callback *script_callback;
     char *perl_argv[4];
@@ -814,8 +814,8 @@ weechat_perl_api_config_section_read_cb (void *data,
     if (script_callback->function && script_callback->function[0])
     {
         perl_argv[0] = script_ptr2str (config_file);
-        perl_argv[1] = option_name;
-        perl_argv[2] = value;
+        perl_argv[1] = (char *)option_name;
+        perl_argv[2] = (char *)value;
         perl_argv[3] = NULL;
         
         rc = (int *) weechat_perl_exec (script_callback->script,
@@ -837,7 +837,7 @@ weechat_perl_api_config_section_read_cb (void *data,
 void
 weechat_perl_api_config_section_write_cb (void *data,
                                           struct t_config_file *config_file,
-                                          char *section_name)
+                                          const char *section_name)
 {
     struct t_script_callback *script_callback;
     char *perl_argv[3];
@@ -848,7 +848,7 @@ weechat_perl_api_config_section_write_cb (void *data,
     if (script_callback->function && script_callback->function[0])
     {
         perl_argv[0] = script_ptr2str (config_file);
-        perl_argv[1] = section_name;
+        perl_argv[1] = (char *)section_name;
         perl_argv[2] = NULL;
         
         rc = (int *) weechat_perl_exec (script_callback->script,
@@ -871,7 +871,7 @@ weechat_perl_api_config_section_write_cb (void *data,
 void
 weechat_perl_api_config_section_write_default_cb (void *data,
                                                   struct t_config_file *config_file,
-                                                  char *section_name)
+                                                  const char *section_name)
 {
     struct t_script_callback *script_callback;
     char *perl_argv[3];
@@ -882,7 +882,7 @@ weechat_perl_api_config_section_write_default_cb (void *data,
     if (script_callback->function && script_callback->function[0])
     {
         perl_argv[0] = script_ptr2str (config_file);
-        perl_argv[1] = section_name;
+        perl_argv[1] = (char *)section_name;
         perl_argv[2] = NULL;
         
         rc = (int *) weechat_perl_exec (script_callback->script,
@@ -905,8 +905,8 @@ int
 weechat_perl_api_config_section_create_option_cb (void *data,
                                                   struct t_config_file *config_file,
                                                   struct t_config_section *section,
-                                                  char *option_name,
-                                                  char *value)
+                                                  const char *option_name,
+                                                  const char *value)
 {
     struct t_script_callback *script_callback;
     char *perl_argv[5];
@@ -918,8 +918,8 @@ weechat_perl_api_config_section_create_option_cb (void *data,
     {
         perl_argv[0] = script_ptr2str (config_file);
         perl_argv[1] = script_ptr2str (section);
-        perl_argv[2] = option_name;
-        perl_argv[3] = value;
+        perl_argv[2] = (char *)option_name;
+        perl_argv[3] = (char *)value;
         perl_argv[4] = NULL;
         
         rc = (int *) weechat_perl_exec (script_callback->script,
@@ -2101,7 +2101,7 @@ static XS (XS_weechat_hook_fd)
 int
 weechat_perl_api_hook_print_cb (void *data, struct t_gui_buffer *buffer,
                                 time_t date, int tags_count, char **tags,
-                                char *prefix, char *message)
+                                const char *prefix, const char *message)
 {
     struct t_script_callback *script_callback;
     char *perl_argv[6];
@@ -2118,8 +2118,8 @@ weechat_perl_api_hook_print_cb (void *data, struct t_gui_buffer *buffer,
     perl_argv[0] = script_ptr2str (buffer);
     perl_argv[1] = timebuffer;
     perl_argv[2] = weechat_string_build_with_exploded (tags, ",");
-    perl_argv[3] = prefix;
-    perl_argv[4] = message;
+    perl_argv[3] = (char *)prefix;
+    perl_argv[4] = (char *)message;
     perl_argv[5] = NULL;
     
     rc = (int *) weechat_perl_exec (script_callback->script,
@@ -2187,7 +2187,7 @@ static XS (XS_weechat_hook_print)
  */
 
 int
-weechat_perl_api_hook_signal_cb (void *data, char *signal, char *type_data,
+weechat_perl_api_hook_signal_cb (void *data, const char *signal, const char *type_data,
                                  void *signal_data)
 {
     struct t_script_callback *script_callback;
@@ -2197,7 +2197,7 @@ weechat_perl_api_hook_signal_cb (void *data, char *signal, char *type_data,
     
     script_callback = (struct t_script_callback *)data;
     
-    perl_argv[0] = signal;
+    perl_argv[0] = (char *)signal;
     free_needed = 0;
     if (strcmp (type_data, WEECHAT_HOOK_SIGNAL_STRING) == 0)
     {
@@ -2329,7 +2329,7 @@ static XS (XS_weechat_hook_signal_send)
  */
 
 int
-weechat_perl_api_hook_config_cb (void *data, char *option, char *value)
+weechat_perl_api_hook_config_cb (void *data, const char *option, const char *value)
 {
     struct t_script_callback *script_callback;
     char *perl_argv[3];
@@ -2337,8 +2337,8 @@ weechat_perl_api_hook_config_cb (void *data, char *option, char *value)
     
     script_callback = (struct t_script_callback *)data;
     
-    perl_argv[0] = option;
-    perl_argv[1] = value;
+    perl_argv[0] = (char *)option;
+    perl_argv[1] = (char *)value;
     perl_argv[2] = NULL;
     
     rc = (int *) weechat_perl_exec (script_callback->script,
@@ -2397,7 +2397,7 @@ static XS (XS_weechat_hook_config)
  */
 
 int
-weechat_perl_api_hook_completion_cb (void *data, char *completion,
+weechat_perl_api_hook_completion_cb (void *data, const char *completion,
                                      struct t_gui_buffer *buffer,
                                      struct t_weelist *list)
 {
@@ -2407,7 +2407,7 @@ weechat_perl_api_hook_completion_cb (void *data, char *completion,
     
     script_callback = (struct t_script_callback *)data;
     
-    perl_argv[0] = completion;
+    perl_argv[0] = (char *)completion;
     perl_argv[1] = script_ptr2str (buffer);
     perl_argv[2] = script_ptr2str (list);
     perl_argv[3] = NULL;
@@ -2472,17 +2472,17 @@ static XS (XS_weechat_hook_completion)
  */
 
 char *
-weechat_perl_api_hook_modifier_cb (void *data, char *modifier,
-                                   char *modifier_data, char *string)
+weechat_perl_api_hook_modifier_cb (void *data, const char *modifier,
+                                   const char *modifier_data, const char *string)
 {
     struct t_script_callback *script_callback;
     char *perl_argv[4];
     
     script_callback = (struct t_script_callback *)data;
     
-    perl_argv[0] = modifier;
-    perl_argv[1] = modifier_data;
-    perl_argv[2] = string;
+    perl_argv[0] = (char *)modifier;
+    perl_argv[1] = (char *)modifier_data;
+    perl_argv[2] = (char *)string;
     perl_argv[3] = NULL;
     
     return (char *)weechat_perl_exec (script_callback->script,
@@ -2617,7 +2617,7 @@ static XS (XS_weechat_unhook_all)
 
 int
 weechat_perl_api_buffer_input_data_cb (void *data, struct t_gui_buffer *buffer,
-                                       char *input_data)
+                                       const char *input_data)
 {
     struct t_script_callback *script_callback;
     char *perl_argv[3];
@@ -2626,7 +2626,7 @@ weechat_perl_api_buffer_input_data_cb (void *data, struct t_gui_buffer *buffer,
     script_callback = (struct t_script_callback *)data;
     
     perl_argv[0] = script_ptr2str (buffer);
-    perl_argv[1] = input_data;
+    perl_argv[1] = (char *)input_data;
     perl_argv[2] = NULL;
     
     rc = (int *) weechat_perl_exec (script_callback->script,
diff --git a/src/plugins/scripts/perl/weechat-perl.c b/src/plugins/scripts/perl/weechat-perl.c
index ec65da636..f76cf337e 100644
--- a/src/plugins/scripts/perl/weechat-perl.c
+++ b/src/plugins/scripts/perl/weechat-perl.c
@@ -41,7 +41,7 @@ struct t_weechat_plugin *weechat_perl_plugin = NULL;
 
 struct t_plugin_script *perl_scripts = NULL;
 struct t_plugin_script *perl_current_script = NULL;
-char *perl_current_script_filename = NULL;
+const char *perl_current_script_filename = NULL;
 
 #ifdef NO_PERL_MULTIPLICITY
 #undef MULTIPLICITY
@@ -106,9 +106,9 @@ char *perl_weechat_code =
 
 void *
 weechat_perl_exec (struct t_plugin_script *script,
-		   int ret_type, char *function, char **argv)
+		   int ret_type, const char *function, char **argv)
 {
-    char *func;
+    const char *func;
     unsigned int count;
     void *ret_value;
     int *ret_i, mem_err, length;
@@ -224,7 +224,7 @@ weechat_perl_exec (struct t_plugin_script *script,
  */
 
 int
-weechat_perl_load (char *filename)
+weechat_perl_load (const char *filename)
 {
     STRLEN len;
     struct t_plugin_script tempscript;
@@ -274,13 +274,13 @@ weechat_perl_load (char *filename)
                 NULL);
     
     eval_pv (perl_weechat_code, TRUE);
-    perl_argv[0] = filename;
+    perl_argv[0] = (char *)filename;
     perl_argv[1] = NULL;
 #else
     snprintf (pkgname, sizeof(pkgname), "%s%d", PKG_NAME_PREFIX, perl_num);
     perl_num++;
     tempscript.interpreter = "WeechatPerlScriptLoader";
-    perl_argv[0] = filename;
+    perl_argv[0] = (char *)filename;
     perl_argv[1] = pkgname;
     perl_argv[2] = NULL;
 #endif
@@ -376,7 +376,7 @@ weechat_perl_load (char *filename)
  */
 
 int
-weechat_perl_load_cb (void *data, char *filename)
+weechat_perl_load_cb (void *data, const char *filename)
 {
     /* make C compiler happy */
     (void) data;
@@ -433,7 +433,7 @@ weechat_perl_unload (struct t_plugin_script *script)
  */
 
 void
-weechat_perl_unload_name (char *name)
+weechat_perl_unload_name (const char *name)
 {
     struct t_plugin_script *ptr_script;
     
@@ -554,7 +554,7 @@ weechat_perl_command_cb (void *data, struct t_gui_buffer *buffer,
  */
 
 int
-weechat_perl_completion_cb (void *data, char *completion,
+weechat_perl_completion_cb (void *data, const char *completion,
                             struct t_gui_buffer *buffer,
                             struct t_weelist *list)
 {
@@ -573,7 +573,7 @@ weechat_perl_completion_cb (void *data, char *completion,
  */
 
 int
-weechat_perl_debug_dump_cb (void *data, char *signal, char *type_data,
+weechat_perl_debug_dump_cb (void *data, const char *signal, const char *type_data,
                             void *signal_data)
 {
     /* make C compiler happy */
@@ -592,7 +592,7 @@ weechat_perl_debug_dump_cb (void *data, char *signal, char *type_data,
  */
 
 int
-weechat_perl_buffer_closed_cb (void *data, char *signal, char *type_data,
+weechat_perl_buffer_closed_cb (void *data, const char *signal, const char *type_data,
                                void *signal_data)
 {
     /* make C compiler happy */
diff --git a/src/plugins/scripts/perl/weechat-perl.h b/src/plugins/scripts/perl/weechat-perl.h
index 7f4a7edbb..a9bba24ac 100644
--- a/src/plugins/scripts/perl/weechat-perl.h
+++ b/src/plugins/scripts/perl/weechat-perl.h
@@ -26,9 +26,10 @@ extern struct t_weechat_plugin *weechat_perl_plugin;
 
 extern struct t_plugin_script *perl_scripts;
 extern struct t_plugin_script *perl_current_script;
-extern char *perl_current_script_filename;
+extern const char *perl_current_script_filename;
 
-extern void * weechat_perl_exec (struct t_plugin_script *script,
-                                 int ret_type, char *function, char **argv);
+extern void *weechat_perl_exec (struct t_plugin_script *script,
+                                int ret_type, const char *function,
+                                char **argv);
 
 #endif /* weechat-perl.h */
diff --git a/src/plugins/scripts/python/weechat-python-api.c b/src/plugins/scripts/python/weechat-python-api.c
index 07598b143..713b608cc 100644
--- a/src/plugins/scripts/python/weechat-python-api.c
+++ b/src/plugins/scripts/python/weechat-python-api.c
@@ -847,7 +847,7 @@ weechat_python_api_config_new (PyObject *self, PyObject *args)
 void
 weechat_python_api_config_read_cb (void *data,
                                    struct t_config_file *config_file,
-                                   char *option_name, char *value)
+                                   const char *option_name, const char *value)
 {
     struct t_script_callback *script_callback;
     char *python_argv[4];
@@ -858,8 +858,8 @@ weechat_python_api_config_read_cb (void *data,
     if (script_callback->function && script_callback->function[0])
     {
         python_argv[0] = script_ptr2str (config_file);
-        python_argv[1] = option_name;
-        python_argv[2] = value;
+        python_argv[1] = (char *)option_name;
+        python_argv[2] = (char *)value;
         python_argv[3] = NULL;
         
         rc = (int *) weechat_python_exec (script_callback->script,
@@ -881,7 +881,7 @@ weechat_python_api_config_read_cb (void *data,
 void
 weechat_python_api_config_section_write_cb (void *data,
                                             struct t_config_file *config_file,
-                                            char *section_name)
+                                            const char *section_name)
 {
     struct t_script_callback *script_callback;
     char *python_argv[3];
@@ -892,7 +892,7 @@ weechat_python_api_config_section_write_cb (void *data,
     if (script_callback->function && script_callback->function[0])
     {
         python_argv[0] = script_ptr2str (config_file);
-        python_argv[1] = section_name;
+        python_argv[1] = (char *)section_name;
         python_argv[2] = NULL;
         
         rc = (int *) weechat_python_exec (script_callback->script,
@@ -915,7 +915,7 @@ weechat_python_api_config_section_write_cb (void *data,
 void
 weechat_python_api_config_section_write_default_cb (void *data,
                                                     struct t_config_file *config_file,
-                                                    char *section_name)
+                                                    const char *section_name)
 {
     struct t_script_callback *script_callback;
     char *python_argv[3];
@@ -926,7 +926,7 @@ weechat_python_api_config_section_write_default_cb (void *data,
     if (script_callback->function && script_callback->function[0])
     {
         python_argv[0] = script_ptr2str (config_file);
-        python_argv[1] = section_name;
+        python_argv[1] = (char *)section_name;
         python_argv[2] = NULL;
         
         rc = (int *) weechat_python_exec (script_callback->script,
@@ -949,8 +949,8 @@ int
 weechat_python_api_config_section_create_option_cb (void *data,
                                                     struct t_config_file *config_file,
                                                     struct t_config_section *section,
-                                                    char *option_name,
-                                                    char *value)
+                                                    const char *option_name,
+                                                    const char *value)
 {
     struct t_script_callback *script_callback;
     char *python_argv[5];
@@ -962,8 +962,8 @@ weechat_python_api_config_section_create_option_cb (void *data,
     {
         python_argv[0] = script_ptr2str (config_file);
         python_argv[1] = script_ptr2str (section);
-        python_argv[2] = option_name;
-        python_argv[3] = value;
+        python_argv[2] = (char *)option_name;
+        python_argv[3] = (char *)value;
         python_argv[4] = NULL;
 
         rc = (int *) weechat_python_exec (script_callback->script,
@@ -2245,7 +2245,7 @@ weechat_python_api_hook_fd (PyObject *self, PyObject *args)
 int
 weechat_python_api_hook_print_cb (void *data, struct t_gui_buffer *buffer,
                                   time_t date, int tags_count, char **tags,
-                                  char *prefix, char *message)
+                                  const char *prefix, const char *message)
 {
     struct t_script_callback *script_callback;
     char *python_argv[6];
@@ -2262,8 +2262,8 @@ weechat_python_api_hook_print_cb (void *data, struct t_gui_buffer *buffer,
     python_argv[0] = script_ptr2str (buffer);
     python_argv[1] = timebuffer;
     python_argv[2] = weechat_string_build_with_exploded (tags, ",");
-    python_argv[3] = prefix;
-    python_argv[4] = message;
+    python_argv[3] = (char *)prefix;
+    python_argv[4] = (char *)message;
     python_argv[5] = NULL;
     
     rc = (int *) weechat_python_exec (script_callback->script,
@@ -2336,7 +2336,7 @@ weechat_python_api_hook_print (PyObject *self, PyObject *args)
  */
 
 int
-weechat_python_api_hook_signal_cb (void *data, char *signal, char *type_data,
+weechat_python_api_hook_signal_cb (void *data, const char *signal, const char *type_data,
                                    void *signal_data)
 {
     struct t_script_callback *script_callback;
@@ -2346,7 +2346,7 @@ weechat_python_api_hook_signal_cb (void *data, char *signal, char *type_data,
     
     script_callback = (struct t_script_callback *)data;
     
-    python_argv[0] = signal;
+    python_argv[0] = (char *)signal;
     free_needed = 0;
     if (strcmp (type_data, WEECHAT_HOOK_SIGNAL_STRING) == 0)
     {
@@ -2481,7 +2481,7 @@ weechat_python_api_hook_signal_send (PyObject *self, PyObject *args)
  */
 
 int
-weechat_python_api_hook_config_cb (void *data, char *option, char *value)
+weechat_python_api_hook_config_cb (void *data, const char *option, const char *value)
 {
     struct t_script_callback *script_callback;
     char *python_argv[3];
@@ -2489,8 +2489,8 @@ weechat_python_api_hook_config_cb (void *data, char *option, char *value)
     
     script_callback = (struct t_script_callback *)data;
     
-    python_argv[0] = option;
-    python_argv[1] = value;
+    python_argv[0] = (char *)option;
+    python_argv[1] = (char *)value;
     python_argv[2] = NULL;
     
     rc = (int *) weechat_python_exec (script_callback->script,
@@ -2551,7 +2551,7 @@ weechat_python_api_hook_config (PyObject *self, PyObject *args)
  */
 
 int
-weechat_python_api_hook_completion_cb (void *data, char *completion,
+weechat_python_api_hook_completion_cb (void *data, const char *completion,
                                        struct t_gui_buffer *buffer,
                                        struct t_weelist *list)
 {
@@ -2561,7 +2561,7 @@ weechat_python_api_hook_completion_cb (void *data, char *completion,
     
     script_callback = (struct t_script_callback *)data;
     
-    python_argv[0] = completion;
+    python_argv[0] = (char *)completion;
     python_argv[1] = script_ptr2str (buffer);
     python_argv[2] = script_ptr2str (list);
     python_argv[3] = NULL;
@@ -2628,17 +2628,17 @@ weechat_python_api_hook_completion (PyObject *self, PyObject *args)
  */
 
 char *
-weechat_python_api_hook_modifier_cb (void *data, char *modifier,
-                                     char *modifier_data, char *string)
+weechat_python_api_hook_modifier_cb (void *data, const char *modifier,
+                                     const char *modifier_data, const char *string)
 {
     struct t_script_callback *script_callback;
     char *python_argv[4];
     
     script_callback = (struct t_script_callback *)data;
     
-    python_argv[0] = modifier;
-    python_argv[1] = modifier_data;
-    python_argv[2] = string;
+    python_argv[0] = (char *)modifier;
+    python_argv[1] = (char *)modifier_data;
+    python_argv[2] = (char *)string;
     python_argv[3] = NULL;
     
     return (char *)weechat_python_exec (script_callback->script,
@@ -2779,7 +2779,7 @@ weechat_python_api_unhook_all (PyObject *self, PyObject *args)
 
 int
 weechat_python_api_buffer_input_data_cb (void *data, struct t_gui_buffer *buffer,
-                                         char *input_data)
+                                         const char *input_data)
 {
     struct t_script_callback *script_callback;
     char *python_argv[3];
@@ -2788,7 +2788,7 @@ weechat_python_api_buffer_input_data_cb (void *data, struct t_gui_buffer *buffer
     script_callback = (struct t_script_callback *)data;
     
     python_argv[0] = script_ptr2str (buffer);
-    python_argv[1] = input_data;
+    python_argv[1] = (char *)input_data;
     python_argv[2] = NULL;
     
     r = (int *) weechat_python_exec (script_callback->script,
diff --git a/src/plugins/scripts/python/weechat-python.c b/src/plugins/scripts/python/weechat-python.c
index 621e8b1f0..784df538e 100644
--- a/src/plugins/scripts/python/weechat-python.c
+++ b/src/plugins/scripts/python/weechat-python.c
@@ -39,7 +39,7 @@ struct t_weechat_plugin *weechat_python_plugin = NULL;
 
 struct t_plugin_script *python_scripts = NULL;
 struct t_plugin_script *python_current_script = NULL;
-char *python_current_script_filename = NULL;
+const char *python_current_script_filename = NULL;
 PyThreadState *python_mainThreadState = NULL;
 
 char python_buffer_output[128];
@@ -51,7 +51,7 @@ char python_buffer_output[128];
 
 void *
 weechat_python_exec (struct t_plugin_script *script,
-		     int ret_type, char *function, char **argv)
+		     int ret_type, const char *function, char **argv)
 {
     PyObject *evMain;
     PyObject *evDict;
@@ -255,7 +255,7 @@ PyMethodDef weechat_python_output_funcs[] = {
  */
 
 int
-weechat_python_load (char *filename)
+weechat_python_load (const char *filename)
 {
     char *argv[] = { "__weechat_plugin__" , NULL };
     FILE *fp;
@@ -441,7 +441,7 @@ weechat_python_load (char *filename)
  */
 
 int
-weechat_python_load_cb (void *data, char *filename)
+weechat_python_load_cb (void *data, const char *filename)
 {
     /* make C compiler happy */
     (void) data;
@@ -484,7 +484,7 @@ weechat_python_unload (struct t_plugin_script *script)
  */
 
 void
-weechat_python_unload_name (char *name)
+weechat_python_unload_name (const char *name)
 {
     struct t_plugin_script *ptr_script;
     
@@ -605,7 +605,7 @@ weechat_python_command_cb (void *data, struct t_gui_buffer *buffer,
  */
 
 int
-weechat_python_completion_cb (void *data, char *completion,
+weechat_python_completion_cb (void *data, const char *completion,
                               struct t_gui_buffer *buffer,
                               struct t_weelist *list)
 {
@@ -624,7 +624,7 @@ weechat_python_completion_cb (void *data, char *completion,
  */
 
 int
-weechat_python_debug_dump_cb (void *data, char *signal, char *type_data,
+weechat_python_debug_dump_cb (void *data, const char *signal, const char *type_data,
                               void *signal_data)
 {
     /* make C compiler happy */
@@ -643,7 +643,7 @@ weechat_python_debug_dump_cb (void *data, char *signal, char *type_data,
  */
 
 int
-weechat_python_buffer_closed_cb (void *data, char *signal, char *type_data,
+weechat_python_buffer_closed_cb (void *data, const char *signal, const char *type_data,
                                  void *signal_data)
 {
     /* make C compiler happy */
diff --git a/src/plugins/scripts/python/weechat-python.h b/src/plugins/scripts/python/weechat-python.h
index 62833e76d..16a659664 100644
--- a/src/plugins/scripts/python/weechat-python.h
+++ b/src/plugins/scripts/python/weechat-python.h
@@ -26,9 +26,10 @@ extern struct t_weechat_plugin *weechat_python_plugin;
 
 extern struct t_plugin_script *python_scripts;
 extern struct t_plugin_script *python_current_script;
-extern char *python_current_script_filename;
+extern const char *python_current_script_filename;
 
-extern void * weechat_python_exec (struct t_plugin_script *script,
-                                   int ret_type, char *function, char **argv);
+extern void *weechat_python_exec (struct t_plugin_script *script,
+                                  int ret_type, const char *function,
+                                  char **argv);
 
 #endif /* weechat-perl.h */
diff --git a/src/plugins/scripts/ruby/weechat-ruby-api.c b/src/plugins/scripts/ruby/weechat-ruby-api.c
index 76bf4b9b1..8507e9d41 100644
--- a/src/plugins/scripts/ruby/weechat-ruby-api.c
+++ b/src/plugins/scripts/ruby/weechat-ruby-api.c
@@ -966,7 +966,7 @@ weechat_ruby_api_config_new (VALUE class, VALUE name, VALUE function)
 void
 weechat_ruby_api_config_read_cb (void *data,
                                  struct t_config_file *config_file,
-                                 char *option_name, char *value)
+                                 const char *option_name, const char *value)
 {
     struct t_script_callback *script_callback;
     char *ruby_argv[4];
@@ -977,8 +977,8 @@ weechat_ruby_api_config_read_cb (void *data,
     if (script_callback->function && script_callback->function[0])
     {
         ruby_argv[0] = script_ptr2str (config_file);
-        ruby_argv[1] = option_name;
-        ruby_argv[2] = value;
+        ruby_argv[1] = (char *)option_name;
+        ruby_argv[2] = (char *)value;
         ruby_argv[3] = NULL;
         
         rc = (int *) weechat_ruby_exec (script_callback->script,
@@ -1000,7 +1000,7 @@ weechat_ruby_api_config_read_cb (void *data,
 void
 weechat_ruby_api_config_section_write_cb (void *data,
                                           struct t_config_file *config_file,
-                                          char *section_name)
+                                          const char *section_name)
 {
     struct t_script_callback *script_callback;
     char *ruby_argv[3];
@@ -1011,7 +1011,7 @@ weechat_ruby_api_config_section_write_cb (void *data,
     if (script_callback->function && script_callback->function[0])
     {
         ruby_argv[0] = script_ptr2str (config_file);
-        ruby_argv[1] = section_name;
+        ruby_argv[1] = (char *)section_name;
         ruby_argv[2] = NULL;
         
         rc = (int *) weechat_ruby_exec (script_callback->script,
@@ -1034,7 +1034,7 @@ weechat_ruby_api_config_section_write_cb (void *data,
 void
 weechat_ruby_api_config_section_write_default_cb (void *data,
                                                   struct t_config_file *config_file,
-                                                  char *section_name)
+                                                  const char *section_name)
 {
     struct t_script_callback *script_callback;
     char *ruby_argv[3];
@@ -1045,7 +1045,7 @@ weechat_ruby_api_config_section_write_default_cb (void *data,
     if (script_callback->function && script_callback->function[0])
     {
         ruby_argv[0] = script_ptr2str (config_file);
-        ruby_argv[1] = section_name;
+        ruby_argv[1] = (char *)section_name;
         ruby_argv[2] = NULL;
         
         rc = (int *) weechat_ruby_exec (script_callback->script,
@@ -1068,8 +1068,8 @@ int
 weechat_ruby_api_config_section_create_option_cb (void *data,
                                                   struct t_config_file *config_file,
                                                   struct t_config_section *section,
-                                                  char *option_name,
-                                                  char *value)
+                                                  const char *option_name,
+                                                  const char *value)
 {
     struct t_script_callback *script_callback;
     char *ruby_argv[5];
@@ -1081,8 +1081,8 @@ weechat_ruby_api_config_section_create_option_cb (void *data,
     {
         ruby_argv[0] = script_ptr2str (config_file);
         ruby_argv[1] = script_ptr2str (section);
-        ruby_argv[2] = option_name;
-        ruby_argv[3] = value;
+        ruby_argv[2] = (char *)option_name;
+        ruby_argv[3] = (char *)value;
         ruby_argv[4] = NULL;
         
         rc = (int *) weechat_ruby_exec (script_callback->script,
@@ -2599,7 +2599,7 @@ weechat_ruby_api_hook_fd (VALUE class, VALUE fd, VALUE read, VALUE write,
 int
 weechat_ruby_api_hook_print_cb (void *data, struct t_gui_buffer *buffer,
                                 time_t date, int tags_count, char **tags,
-                                char *prefix, char *message)
+                                const char *prefix, const char *message)
 {
     struct t_script_callback *script_callback;
     char *ruby_argv[6];
@@ -2616,8 +2616,8 @@ weechat_ruby_api_hook_print_cb (void *data, struct t_gui_buffer *buffer,
     ruby_argv[0] = script_ptr2str (buffer);
     ruby_argv[1] = timebuffer;
     ruby_argv[2] = weechat_string_build_with_exploded (tags, ",");
-    ruby_argv[3] = prefix;
-    ruby_argv[4] = message;
+    ruby_argv[3] = (char *)prefix;
+    ruby_argv[4] = (char *)message;
     ruby_argv[5] = NULL;
     
     rc = (int *) weechat_ruby_exec (script_callback->script,
@@ -2703,7 +2703,7 @@ weechat_ruby_api_hook_print (VALUE class, VALUE buffer, VALUE tags,
  */
 
 int
-weechat_ruby_api_hook_signal_cb (void *data, char *signal, char *type_data,
+weechat_ruby_api_hook_signal_cb (void *data, const char *signal, const char *type_data,
                                  void *signal_data)
 {
     struct t_script_callback *script_callback;
@@ -2713,7 +2713,7 @@ weechat_ruby_api_hook_signal_cb (void *data, char *signal, char *type_data,
     
     script_callback = (struct t_script_callback *)data;
 
-    ruby_argv[0] = signal;
+    ruby_argv[0] = (char *)signal;
     free_needed = 0;
     if (strcmp (type_data, WEECHAT_HOOK_SIGNAL_STRING) == 0)
     {
@@ -2862,7 +2862,7 @@ weechat_ruby_api_hook_signal_send (VALUE class, VALUE signal, VALUE type_data,
  */
 
 int
-weechat_ruby_api_hook_config_cb (void *data, char *option, char *value)
+weechat_ruby_api_hook_config_cb (void *data, const char *option, const char *value)
 {
     struct t_script_callback *script_callback;
     char *ruby_argv[3];
@@ -2870,8 +2870,8 @@ weechat_ruby_api_hook_config_cb (void *data, char *option, char *value)
     
     script_callback = (struct t_script_callback *)data;
     
-    ruby_argv[0] = option;
-    ruby_argv[1] = value;
+    ruby_argv[0] = (char *)option;
+    ruby_argv[1] = (char *)value;
     ruby_argv[2] = NULL;
     
     rc = (int *) weechat_ruby_exec (script_callback->script,
@@ -2938,7 +2938,7 @@ weechat_ruby_api_hook_config (VALUE class, VALUE option, VALUE function)
  */
 
 int
-weechat_ruby_api_hook_completion_cb (void *data, char *completion,
+weechat_ruby_api_hook_completion_cb (void *data, const char *completion,
                                      struct t_gui_buffer *buffer,
                                      struct t_weelist *list)
 {
@@ -2948,7 +2948,7 @@ weechat_ruby_api_hook_completion_cb (void *data, char *completion,
     
     script_callback = (struct t_script_callback *)data;
     
-    ruby_argv[0] = completion;
+    ruby_argv[0] = (char *)completion;
     ruby_argv[1] = script_ptr2str (buffer);
     ruby_argv[2] = script_ptr2str (list);
     ruby_argv[3] = NULL;
@@ -3022,17 +3022,17 @@ weechat_ruby_api_hook_completion (VALUE class, VALUE completion,
  */
 
 char *
-weechat_ruby_api_hook_modifier_cb (void *data, char *modifier,
-                                   char *modifier_data,  char *string)
+weechat_ruby_api_hook_modifier_cb (void *data, const char *modifier,
+                                   const char *modifier_data,  const char *string)
 {
     struct t_script_callback *script_callback;
     char *ruby_argv[4];
     
     script_callback = (struct t_script_callback *)data;
     
-    ruby_argv[0] = modifier;
-    ruby_argv[1] = modifier_data;
-    ruby_argv[2] = string;
+    ruby_argv[0] = (char *)modifier;
+    ruby_argv[1] = (char *)modifier_data;
+    ruby_argv[2] = (char *)string;
     ruby_argv[3] = NULL;
     
     return (char *)weechat_ruby_exec (script_callback->script,
@@ -3191,7 +3191,7 @@ weechat_ruby_api_unhook_all (VALUE class)
 
 int
 weechat_ruby_api_buffer_input_data_cb (void *data, struct t_gui_buffer *buffer,
-                                       char *input_data)
+                                       const char *input_data)
 {
     struct t_script_callback *script_callback;
     char *ruby_argv[3];
@@ -3200,7 +3200,7 @@ weechat_ruby_api_buffer_input_data_cb (void *data, struct t_gui_buffer *buffer,
     script_callback = (struct t_script_callback *)data;
     
     ruby_argv[0] = script_ptr2str (buffer);
-    ruby_argv[1] = input_data;
+    ruby_argv[1] = (char *)input_data;
     ruby_argv[2] = NULL;
     
     rc = (int *) weechat_ruby_exec (script_callback->script,
diff --git a/src/plugins/scripts/ruby/weechat-ruby.c b/src/plugins/scripts/ruby/weechat-ruby.c
index 190aab498..1b2e4ed3f 100644
--- a/src/plugins/scripts/ruby/weechat-ruby.c
+++ b/src/plugins/scripts/ruby/weechat-ruby.c
@@ -42,7 +42,7 @@ struct t_weechat_plugin *weechat_ruby_plugin = NULL;
 
 struct t_plugin_script *ruby_scripts = NULL;
 struct t_plugin_script *ruby_current_script = NULL;
-char *ruby_current_script_filename = NULL;
+const char *ruby_current_script_filename = NULL;
 
 VALUE ruby_mWeechat, ruby_mWeechatOutputs;
 
@@ -107,7 +107,7 @@ rb_protect_funcall (VALUE recv, ID mid, int *state, int argc, ...)
 
 void *
 weechat_ruby_exec (struct t_plugin_script *script,
-		   int ret_type, char *function, char **argv)
+		   int ret_type, const char *function, char **argv)
 {
     VALUE rc, err;
     int ruby_error, *ret_i;
@@ -296,7 +296,7 @@ weechat_ruby_output_flush (VALUE self)
  */
 
 int
-weechat_ruby_load (char *filename)
+weechat_ruby_load (const char *filename)
 {
     char modname[64];
     VALUE curModule, ruby_retcode, err;
@@ -422,7 +422,7 @@ weechat_ruby_load (char *filename)
  */
 
 int
-weechat_ruby_load_cb (void *data, char *filename)
+weechat_ruby_load_cb (void *data, const char *filename)
 {
     /* make C compiler happy */
     (void) data;
@@ -468,7 +468,7 @@ weechat_ruby_unload (struct t_plugin_script *script)
  */
 
 void
-weechat_ruby_unload_name (char *name)
+weechat_ruby_unload_name (const char *name)
 {
     struct t_plugin_script *ptr_script;
     
@@ -589,7 +589,7 @@ weechat_ruby_command_cb (void *data, struct t_gui_buffer *buffer,
  */
 
 int
-weechat_ruby_completion_cb (void *data, char *completion,
+weechat_ruby_completion_cb (void *data, const char *completion,
                             struct t_gui_buffer *buffer,
                             struct t_weelist *list)
 {
@@ -608,7 +608,7 @@ weechat_ruby_completion_cb (void *data, char *completion,
  */
 
 int
-weechat_ruby_debug_dump_cb (void *data, char *signal, char *type_data,
+weechat_ruby_debug_dump_cb (void *data, const char *signal, const char *type_data,
                             void *signal_data)
 {
     /* make C compiler happy */
@@ -627,7 +627,7 @@ weechat_ruby_debug_dump_cb (void *data, char *signal, char *type_data,
  */
 
 int
-weechat_ruby_buffer_closed_cb (void *data, char *signal, char *type_data,
+weechat_ruby_buffer_closed_cb (void *data, const char *signal, const char *type_data,
                                void *signal_data)
 {
     /* make C compiler happy */
diff --git a/src/plugins/scripts/ruby/weechat-ruby.h b/src/plugins/scripts/ruby/weechat-ruby.h
index db07bd5be..02f514c0f 100644
--- a/src/plugins/scripts/ruby/weechat-ruby.h
+++ b/src/plugins/scripts/ruby/weechat-ruby.h
@@ -26,9 +26,10 @@ extern struct t_weechat_plugin *weechat_ruby_plugin;
 
 extern struct t_plugin_script *ruby_scripts;
 extern struct t_plugin_script *ruby_current_script;
-extern char *ruby_current_script_filename;
+extern const char *ruby_current_script_filename;
 
-extern void * weechat_ruby_exec (struct t_plugin_script *script,
-                                 int ret_type, char *function, char **argv);
+extern void *weechat_ruby_exec (struct t_plugin_script *script,
+                                int ret_type, const char *function,
+                                char **argv);
 
 #endif /* weechat-perl.h */
diff --git a/src/plugins/scripts/script-api.c b/src/plugins/scripts/script-api.c
index e074b5115..55f877f78 100644
--- a/src/plugins/scripts/script-api.c
+++ b/src/plugins/scripts/script-api.c
@@ -35,7 +35,7 @@
 
 void
 script_api_charset_set (struct t_plugin_script *script,
-                        char *charset)
+                        const char *charset)
 {
     if (script->charset)
         free (script->charset);
@@ -51,10 +51,10 @@ script_api_charset_set (struct t_plugin_script *script,
 struct t_config_file *
 script_api_config_new (struct t_weechat_plugin *weechat_plugin,
                        struct t_plugin_script *script,
-                       char *name,
+                       const char *name,
                        int (*callback_reload)(void *data,
                                               struct t_config_file *config_file),
-                       char *function)
+                       const char *function)
 {
     struct t_script_callback *new_script_callback;
     struct t_config_file *new_config_file;
@@ -97,28 +97,28 @@ struct t_config_section *
 script_api_config_new_section (struct t_weechat_plugin *weechat_plugin,
                                struct t_plugin_script *script,
                                struct t_config_file *config_file,
-                               char *name,
+                               const char *name,
                                int user_can_add_options,
                                int user_can_delete_options,
                                void (*callback_read)(void *data,
                                                      struct t_config_file *config_file,
-                                                     char *option_name,
-                                                     char *value),
+                                                     const char *option_name,
+                                                     const char *value),
                                char *function_read,
                                void (*callback_write)(void *data,
                                                       struct t_config_file *config_file,
-                                                      char *section_name),
+                                                      const char *section_name),
                                char *function_write,
                                void (*callback_write_default)(void *data,
                                                               struct t_config_file *config_file,
-                                                              char *section_name),
+                                                              const char *section_name),
                                char *function_write_default,
                                int (*callback_create_option)(void *data,
                                                              struct t_config_file *config_file,
                                                              struct t_config_section *section,
-                                                             char *option_name,
-                                                             char *value),
-                               char *function_create_option)
+                                                             const char *option_name,
+                                                             const char *value),
+                               const char *function_create_option)
 {
     struct t_script_callback *new_script_callback1, *new_script_callback2;
     struct t_script_callback *new_script_callback3, *new_script_callback4;
@@ -288,19 +288,19 @@ script_api_config_new_option (struct t_weechat_plugin *weechat_plugin,
                               struct t_plugin_script *script,
                               struct t_config_file *config_file,
                               struct t_config_section *section,
-                              char *name, char *type,
-                              char *description, char *string_values,
-                              int min, int max, char *default_value,
+                              const char *name, const char *type,
+                              const char *description, const char *string_values,
+                              int min, int max, const char *default_value,
                               void (*callback_check_value)(void *data,
                                                            struct t_config_option *option,
-                                                           char *value),
-                              char *function_check_value,
+                                                           const char *value),
+                              const char *function_check_value,
                               void (*callback_change)(void *data,
                                                       struct t_config_option *option),
-                              char *function_change,
+                              const char *function_change,
                               void (*callback_delete)(void *data,
                                                       struct t_config_option *option),
-                              char *function_delete)
+                              const char *function_delete)
 {
     struct t_script_callback *new_script_callback1, *new_script_callback2;
     struct t_script_callback *new_script_callback3;
@@ -451,7 +451,7 @@ script_api_config_free (struct t_weechat_plugin *weechat_plugin,
 void
 script_api_printf (struct t_weechat_plugin *weechat_plugin,
                    struct t_plugin_script *script,
-                   struct t_gui_buffer *buffer, char *format, ...)
+                   struct t_gui_buffer *buffer, const char *format, ...)
 {
     va_list argptr;
     char *buf, *buf2;
@@ -481,7 +481,8 @@ void
 script_api_printf_date_tags (struct t_weechat_plugin *weechat_plugin,
                              struct t_plugin_script *script,
                              struct t_gui_buffer *buffer,
-                             time_t date, char *tags, char *format, ...)
+                             time_t date, const char *tags,
+                             const char *format, ...)
 {
     va_list argptr;
     char *buf, *buf2;
@@ -512,7 +513,7 @@ void
 script_api_printf_y (struct t_weechat_plugin *weechat_plugin,
                      struct t_plugin_script *script,
                      struct t_gui_buffer *buffer, int y,
-                     char *format, ...)
+                     const char *format, ...)
 {
     va_list argptr;
     char *buf, *buf2;
@@ -541,8 +542,8 @@ script_api_printf_y (struct t_weechat_plugin *weechat_plugin,
 void
 script_api_infobar_printf (struct t_weechat_plugin *weechat_plugin,
                            struct t_plugin_script *script,
-                           int delay, char *color_name,
-                           char *format, ...)
+                           int delay, const char *color_name,
+                           const char *format, ...)
 {
     va_list argptr;
     char buf[1024];
@@ -566,7 +567,7 @@ script_api_infobar_printf (struct t_weechat_plugin *weechat_plugin,
 void
 script_api_log_printf (struct t_weechat_plugin *weechat_plugin,
                        struct t_plugin_script *script,
-                       char *format, ...)
+                       const char *format, ...)
 {
     va_list argptr;
     char *buf, *buf2;
@@ -594,14 +595,14 @@ script_api_log_printf (struct t_weechat_plugin *weechat_plugin,
 struct t_hook *
 script_api_hook_command (struct t_weechat_plugin *weechat_plugin,
                          struct t_plugin_script *script,
-                         char *command, char *description,
-                         char *args, char *args_description,
-                         char *completion,
+                         const char *command, const char *description,
+                         const char *args, const char *args_description,
+                         const char *completion,
                          int (*callback)(void *data,
                                          struct t_gui_buffer *buffer,
                                          int argc, char **argv,
                                          char **argv_eol),
-                         char *function)
+                         const char *function)
 {
     struct t_script_callback *new_script_callback;
     struct t_hook *new_hook;
@@ -639,7 +640,7 @@ script_api_hook_timer (struct t_weechat_plugin *weechat_plugin,
                        struct t_plugin_script *script,
                        int interval, int align_second, int max_calls,
                        int (*callback)(void *data),
-                       char *function)
+                       const char *function)
 {
     struct t_script_callback *new_script_callback;
     struct t_hook *new_hook;
@@ -677,7 +678,7 @@ script_api_hook_fd (struct t_weechat_plugin *weechat_plugin,
                     int fd, int flag_read, int flag_write,
                     int flag_exception,
                     int (*callback)(void *data),
-                    char *function)
+                    const char *function)
 {
     struct t_script_callback *new_script_callback;
     struct t_hook *new_hook;
@@ -713,13 +714,14 @@ struct t_hook *
 script_api_hook_print (struct t_weechat_plugin *weechat_plugin,
                        struct t_plugin_script *script,
                        struct t_gui_buffer *buffer,
-                       char *tags, char *message, int strip_colors,
+                       const char *tags, const char *message, int strip_colors,
                        int (*callback)(void *data,
                                        struct t_gui_buffer *buffer,
                                        time_t date,
                                        int tags_count, char **tags,
-                                       char *prefix, char *message),
-                       char *function)
+                                       const char *prefix,
+                                       const char *message),
+                       const char *function)
 {
     struct t_script_callback *new_script_callback;
     struct t_hook *new_hook;
@@ -754,11 +756,11 @@ script_api_hook_print (struct t_weechat_plugin *weechat_plugin,
 struct t_hook *
 script_api_hook_signal (struct t_weechat_plugin *weechat_plugin,
                         struct t_plugin_script *script,
-                        char *signal,
-                        int (*callback)(void *data, char *signal,
-                                        char *type_data,
+                        const char *signal,
+                        int (*callback)(void *data, const char *signal,
+                                        const char *type_data,
                                         void *signal_data),
-                        char *function)
+                        const char *function)
 {
     struct t_script_callback *new_script_callback;
     struct t_hook *new_hook;
@@ -792,10 +794,10 @@ script_api_hook_signal (struct t_weechat_plugin *weechat_plugin,
 struct t_hook *
 script_api_hook_config (struct t_weechat_plugin *weechat_plugin,
                         struct t_plugin_script *script,
-                        char *option,
-                        int (*callback)(void *data, char *option,
-                                        char *value),
-                        char *function)
+                        const char *option,
+                        int (*callback)(void *data, const char *option,
+                                        const char *value),
+                        const char *function)
 {
     struct t_script_callback *new_script_callback;
     struct t_hook *new_hook;
@@ -829,11 +831,11 @@ script_api_hook_config (struct t_weechat_plugin *weechat_plugin,
 struct t_hook *
 script_api_hook_completion (struct t_weechat_plugin *weechat_plugin,
                             struct t_plugin_script *script,
-                            char *completion,
-                            int (*callback)(void *data, char *completion,
+                            const char *completion,
+                            int (*callback)(void *data, const char *completion,
                                             struct t_gui_buffer *buffer,
                                             struct t_weelist *list),
-                            char *function)
+                            const char *function)
 {
     struct t_script_callback *new_script_callback;
     struct t_hook *new_hook;
@@ -867,10 +869,11 @@ script_api_hook_completion (struct t_weechat_plugin *weechat_plugin,
 struct t_hook *
 script_api_hook_modifier (struct t_weechat_plugin *weechat_plugin,
                           struct t_plugin_script *script,
-                          char *modifier,
-                          char *(*callback)(void *data, char *modifier,
-                                            char *modifier_data, char *string),
-                          char *function)
+                          const char *modifier,
+                          char *(*callback)(void *data, const char *modifier,
+                                            const char *modifier_data,
+                                            const char *string),
+                          const char *function)
 {
     struct t_script_callback *new_script_callback;
     struct t_hook *new_hook;
@@ -951,14 +954,14 @@ script_api_unhook_all (struct t_plugin_script *script)
 struct t_gui_buffer *
 script_api_buffer_new (struct t_weechat_plugin *weechat_plugin,
                        struct t_plugin_script *script,
-                       char *category, char *name,
+                       const char *category, const char *name,
                        int (*input_callback)(void *data,
                                              struct t_gui_buffer *buffer,
-                                             char *input_data),
-                       char *function_input,
+                                             const char *input_data),
+                       const char *function_input,
                        int (*close_callback)(void *data,
                                              struct t_gui_buffer *buffer),
-                       char *function_close)
+                       const char *function_close)
 {
     struct t_script_callback *new_script_callback_input;
     struct t_script_callback *new_script_callback_close;
@@ -1071,13 +1074,13 @@ script_api_buffer_close (struct t_weechat_plugin *weechat_plugin,
 struct t_gui_bar_item *
 script_api_bar_item_new (struct t_weechat_plugin *weechat_plugin,
                          struct t_plugin_script *script,
-                         char *name,
+                         const char *name,
                          char *(*build_callback)(void *data,
                                                  struct t_gui_bar_item *item,
                                                  struct t_gui_window *window,
                                                  int max_width,
                                                  int max_height),
-                         char *function_build)
+                         const char *function_build)
 {
     struct t_script_callback *new_script_callback;
     struct t_gui_bar_item *new_item;
@@ -1143,7 +1146,7 @@ script_api_bar_item_remove (struct t_weechat_plugin *weechat_plugin,
 void
 script_api_command (struct t_weechat_plugin *weechat_plugin,
                     struct t_plugin_script *script,
-                    struct t_gui_buffer *buffer, char *command)
+                    struct t_gui_buffer *buffer, const char *command)
 {
     char *command2;
     
@@ -1164,7 +1167,7 @@ script_api_command (struct t_weechat_plugin *weechat_plugin,
 char *
 script_api_config_get_plugin (struct t_weechat_plugin *weechat_plugin,
                               struct t_plugin_script *script,
-                              char *option)
+                              const char *option)
 {
     char *option_fullname, *return_value;
     
@@ -1191,7 +1194,7 @@ script_api_config_get_plugin (struct t_weechat_plugin *weechat_plugin,
 int
 script_api_config_set_plugin (struct t_weechat_plugin *weechat_plugin,
                               struct t_plugin_script *script,
-                              char *option, char *value)
+                              const char *option, const char *value)
 {
     char *option_fullname;
     int return_code;
diff --git a/src/plugins/scripts/script-api.h b/src/plugins/scripts/script-api.h
index 9ba42c049..f9bc3dc2c 100644
--- a/src/plugins/scripts/script-api.h
+++ b/src/plugins/scripts/script-api.h
@@ -20,179 +20,179 @@
 #define __WEECHAT_SCRIPT_API_H 1
 
 extern void script_api_charset_set (struct t_plugin_script *script,
-                                    char *charset);
+                                    const char *charset);
 extern struct t_config_file *script_api_config_new (struct t_weechat_plugin *weechat_plugin,
                                                     struct t_plugin_script *script,
-                                                    char *name,
+                                                    const char *name,
                                                     int (*callback_reload)(void *data,
                                                                            struct t_config_file *config_file),
-                                                    char *function);
+                                                    const char *function);
 extern struct t_config_section *script_api_config_new_section (struct t_weechat_plugin *weechat_plugin,
                                                                struct t_plugin_script *script,
                                                                struct t_config_file *config_file,
-                                                               char *name,
+                                                               const char *name,
                                                                int user_can_add_options,
                                                                int user_can_delete_options,
                                                                void (*callback_read)(void *data,
                                                                                      struct t_config_file *config_file,
-                                                                                     char *option_name,
-                                                                                     char *value),
-                                                               char *function_read,
+                                                                                     const char *option_name,
+                                                                                     const char *value),
+                                                               const char *function_read,
                                                                void (*callback_write)(void *data,
                                                                                       struct t_config_file *config_file,
-                                                                                      char *section_name),
-                                                               char *function_write,
+                                                                                      const char *section_name),
+                                                               const char *function_write,
                                                                void (*callback_write_default)(void *data,
                                                                                               struct t_config_file *config_file,
-                                                                                              char *section_name),
-                                                               char *function_write_default,
+                                                                                              const char *section_name),
+                                                               const char *function_write_default,
                                                                int (*callback_create_option)(void *data,
                                                                                              struct t_config_file *config_file,
                                                                                              struct t_config_section *section,
-                                                                                             char *option_name,
-                                                                                             char *value),
-                                                               char *function_create_option);
+                                                                                             const char *option_name,
+                                                                                             const char *value),
+                                                               const char *function_create_option);
 extern struct t_config_option *script_api_config_new_option (struct t_weechat_plugin *weechat_plugin,
                                                              struct t_plugin_script *script,
                                                              struct t_config_file *config_file,
                                                              struct t_config_section *section,
-                                                             char *name,
-                                                             char *type,
-                                                             char *description,
-                                                             char *string_values,
+                                                             const char *name,
+                                                             const char *type,
+                                                             const char *description,
+                                                             const char *string_values,
                                                              int min, int max,
-                                                             char *default_value,
+                                                             const char *default_value,
                                                              void (*callback_change)(void *data),
-                                                             char *function);
+                                                             const char *function);
 extern void script_api_config_free (struct t_weechat_plugin *weechat_plugin,
                                     struct t_plugin_script *script,
                                     struct t_config_file *config_file);
 extern void script_api_printf (struct t_weechat_plugin *weechat_plugin,
                                struct t_plugin_script *script,
                                struct t_gui_buffer *buffer,
-                               char *format, ...);
+                               const char *format, ...);
 extern void script_api_printf_date_tags (struct t_weechat_plugin *weechat_plugin,
                                          struct t_plugin_script *script,
                                          struct t_gui_buffer *buffer,
-                                         time_t date, char *tags,
-                                         char *format, ...);
+                                         time_t date, const char *tags,
+                                         const char *format, ...);
 extern void script_api_printf_y (struct t_weechat_plugin *weechat_plugin,
                                  struct t_plugin_script *script,
                                  struct t_gui_buffer *buffer,
-                                 int y, char *format, ...);
+                                 int y, const char *format, ...);
 extern void script_api_infobar_printf (struct t_weechat_plugin *weechat_plugin,
                                        struct t_plugin_script *script,
-                                       int delay, char *color_name,
-                                       char *format, ...);
+                                       int delay, const char *color_name,
+                                       const char *format, ...);
 extern void script_api_log_printf (struct t_weechat_plugin *weechat_plugin,
                                    struct t_plugin_script *script,
-                                   char *format, ...);
+                                   const char *format, ...);
 extern struct t_hook *script_api_hook_command (struct t_weechat_plugin *weechat_plugin,
                                                struct t_plugin_script *script,
-                                               char *command, char *description,
-                                               char *args, char *args_description,
-                                               char *completion,
+                                               const char *command, const char *description,
+                                               const char *args, const char *args_description,
+                                               const char *completion,
                                                int (*callback)(void *data,
                                                                struct t_gui_buffer *buffer,
                                                                int argc, char **argv,
                                                                char **argv_eol),
-                                               char *function);
+                                               const char *function);
 extern struct t_hook *script_api_hook_timer (struct t_weechat_plugin *weechat_plugin,
                                              struct t_plugin_script *script,
                                              int interval, int align_second,
                                              int max_calls,
                                              int (*callback)(void *data),
-                                             char *function);
+                                             const char *function);
 extern struct t_hook *script_api_hook_fd (struct t_weechat_plugin *weechat_plugin,
                                           struct t_plugin_script *script,
                                           int fd, int flag_read,
                                           int flag_write, int flag_exception,
                                           int (*callback)(void *data),
-                                          char *function);
+                                          const char *function);
 extern struct t_hook *script_api_hook_print (struct t_weechat_plugin *weechat_plugin,
                                              struct t_plugin_script *script,
                                              struct t_gui_buffer *buffer,
-                                             char *tags,
-                                             char *message,
+                                             const char *tags,
+                                             const char *message,
                                              int strip_colors,
                                              int (*callback)(void *data,
                                                              struct t_gui_buffer *buffer,
                                                              time_t date,
                                                              int tags_count,
                                                              char **tags,
-                                                             char *prefix,
-                                                             char *message),
-                                             char *function);
+                                                             const char *prefix,
+                                                             const char *message),
+                                             const char *function);
 extern struct t_hook *script_api_hook_signal (struct t_weechat_plugin *weechat_plugin,
                                               struct t_plugin_script *script,
-                                              char *signal,
+                                              const char *signal,
                                               int (*callback)(void *data,
-                                                              char *signal,
-                                                              char *type_data,
+                                                              const char *signal,
+                                                              const char *type_data,
                                                               void *signal_data),
-                                              char *function);
+                                              const char *function);
 extern struct t_hook *script_api_hook_config (struct t_weechat_plugin *weechat_plugin,
                                               struct t_plugin_script *script,
-                                              char *option,
+                                              const char *option,
                                               int (*callback)(void *data,
-                                                              char *option,
-                                                              char *value),
-                                              char *function);
+                                                              const char *option,
+                                                              const char *value),
+                                              const char *function);
 extern struct t_hook *script_api_hook_completion (struct t_weechat_plugin *weechat_plugin,
                                                   struct t_plugin_script *script,
-                                                  char *completion,
+                                                  const char *completion,
                                                   int (*callback)(void *data,
-                                                                  char *completion,
+                                                                  const char *completion,
                                                                   struct t_gui_buffer *buffer,
                                                                   struct t_weelist *list),
-                                                  char *function);
+                                                  const char *function);
 extern struct t_hook *script_api_hook_modifier (struct t_weechat_plugin *weechat_plugin,
                                                 struct t_plugin_script *script,
-                                                char *modifier,
+                                                const char *modifier,
                                                 char *(*callback)(void *data,
-                                                                  char *modifier,
-                                                                  char *modifier_data,
-                                                                  char *string),
-                                                char *function);
+                                                                  const char *modifier,
+                                                                  const char *modifier_data,
+                                                                  const char *string),
+                                                const char *function);
 extern void script_api_unhook (struct t_weechat_plugin *weechat_plugin,
                                struct t_plugin_script *script,
                                struct t_hook *hook);
 extern void script_api_unhook_all (struct t_plugin_script *script);
 extern struct t_gui_buffer *script_api_buffer_new (struct t_weechat_plugin *weechat_plugin,
                                                    struct t_plugin_script *script,
-                                                   char *category, char *name,
+                                                   const char *category, const char *name,
                                                    int (*input_callback)(void *data,
                                                                          struct t_gui_buffer *buffer,
-                                                                         char *input_data),
-                                                   char *function_input,
+                                                                         const char *input_data),
+                                                   const char *function_input,
                                                    int (*close_callback)(void *data,
                                                                          struct t_gui_buffer *buffer),
-                                                   char *function_close);
+                                                   const char *function_close);
 extern void script_api_buffer_close (struct t_weechat_plugin *weechat_plugin,
                                      struct t_plugin_script *script,
                                      struct t_gui_buffer *buffer,
                                      int switch_to_another);
 extern struct t_gui_bar_item *script_api_bar_item_new (struct t_weechat_plugin *weechat_plugin,
                                                        struct t_plugin_script *script,
-                                                       char *name,
+                                                       const char *name,
                                                        char *(*build_callback)(void *data,
                                                                                struct t_gui_bar_item *item,
                                                                                struct t_gui_window *window,
                                                                                int max_width,
                                                                                int max_height),
-                                                       char *function_build);
+                                                       const char *function_build);
 extern void script_api_bar_item_remove (struct t_weechat_plugin *weechat_plugin,
                                         struct t_plugin_script *script,
                                         struct t_gui_bar_item *item);
 extern void script_api_command (struct t_weechat_plugin *weechat_plugin,
                                 struct t_plugin_script *script,
                                 struct t_gui_buffer *buffer,
-                                char *command);
+                                const char *command);
 extern char *script_api_config_get_plugin (struct t_weechat_plugin *weechat_plugin,
                                            struct t_plugin_script *script,
-                                           char *option);
+                                           const char *option);
 extern int script_api_config_set_plugin (struct t_weechat_plugin *weechat_plugin,
                                          struct t_plugin_script *script,
-                                         char *option, char *value);
+                                         const char *option, const char *value);
 
 #endif /* script-api.h */
diff --git a/src/plugins/scripts/script.c b/src/plugins/scripts/script.c
index 12dc1ec9d..869d95e55 100644
--- a/src/plugins/scripts/script.c
+++ b/src/plugins/scripts/script.c
@@ -63,7 +63,7 @@ script_config_read (struct t_weechat_plugin *weechat_plugin)
  */
 
 int
-script_config_cb (void *data, char *option, char *value)
+script_config_cb (void *data, const char *option, const char *value)
 {
     /* make C compiler happy */
     (void) option;
@@ -84,16 +84,16 @@ script_init (struct t_weechat_plugin *weechat_plugin,
                                      struct t_gui_buffer *buffer,
                                      int argc, char **argv,
                                      char **argv_eol),
-             int (*callback_completion)(void *data, char *completion,
+             int (*callback_completion)(void *data, const char *completion,
                                         struct t_gui_buffer *buffer,
                                         struct t_weelist *list),
-             int (*callback_signal_debug_dump)(void *data, char *signal,
-                                               char *type_data,
+             int (*callback_signal_debug_dump)(void *data, const char *signal,
+                                               const char *type_data,
                                                void *signal_data),
-             int (*callback_signal_buffer_closed)(void *data, char *signal,
-                                               char *type_data,
+             int (*callback_signal_buffer_closed)(void *data, const char *signal,
+                                               const char *type_data,
                                                void *signal_data),
-             int (*callback_load_file)(void *data, char *filename))
+             int (*callback_load_file)(void *data, const char *filename))
 {
     char *string, *completion = "list|listfull|load|autoload|reload|unload %f";
     int length;
@@ -190,7 +190,7 @@ script_ptr2str (void *pointer)
  */
 
 void *
-script_str2ptr (char *pointer_str)
+script_str2ptr (const char *pointer_str)
 {
     unsigned int value;
     
@@ -208,7 +208,7 @@ script_str2ptr (char *pointer_str)
 
 void
 script_auto_load (struct t_weechat_plugin *weechat_plugin,
-                  int (*callback)(void *data, char *filename))
+                  int (*callback)(void *data, const char *filename))
 {
     char *dir_home, *dir_name;
     int dir_length;
@@ -235,7 +235,7 @@ script_auto_load (struct t_weechat_plugin *weechat_plugin,
 
 struct t_plugin_script *
 script_search (struct t_weechat_plugin *weechat_plugin,
-               struct t_plugin_script *scripts, char *name)
+               struct t_plugin_script *scripts, const char *name)
 {
     struct t_plugin_script *ptr_script;
     
@@ -256,7 +256,7 @@ script_search (struct t_weechat_plugin *weechat_plugin,
 
 char *
 script_search_full_name (struct t_weechat_plugin *weechat_plugin,
-                         char *filename)
+                         const char *filename)
 {
     char *final_name, *dir_home, *dir_system;
     int length;
@@ -347,9 +347,9 @@ script_search_full_name (struct t_weechat_plugin *weechat_plugin,
 struct t_plugin_script *
 script_add (struct t_weechat_plugin *weechat_plugin,
             struct t_plugin_script **scripts,
-            char *filename, char *name, char *author, char *version,
-            char *license, char *description, char *shutdown_func,
-            char *charset)
+            const char *filename, const char *name, const char *author, const char *version,
+            const char *license, const char *description, const char *shutdown_func,
+            const char *charset)
 {
     struct t_plugin_script *new_script;
     
@@ -544,7 +544,7 @@ script_completion (struct t_weechat_plugin *weechat_plugin,
 void
 script_display_list (struct t_weechat_plugin *weechat_plugin,
                      struct t_plugin_script *scripts,
-                     char *name, int full)
+                     const char *name, int full)
 {
     struct t_plugin_script *ptr_script;
     
diff --git a/src/plugins/scripts/script.h b/src/plugins/scripts/script.h
index e189929d1..0ff89b541 100644
--- a/src/plugins/scripts/script.h
+++ b/src/plugins/scripts/script.h
@@ -61,33 +61,33 @@ extern void script_init (struct t_weechat_plugin *weechat_plugin,
                                                  struct t_gui_buffer *buffer,
                                                  int argc, char **argv,
                                                  char **argv_eol),
-                         int (*callback_completion)(void *data, char *completion,
+                         int (*callback_completion)(void *data, const char *completion,
                                                     struct t_gui_buffer *buffer,
                                                     struct t_weelist *list),
                          int (*callback_signal_debug_dump)(void *data,
-                                                           char *signal,
-                                                           char *type_data,
+                                                           const char *signal,
+                                                           const char *type_data,
                                                            void *signal_data),
                          int (*callback_signal_buffer_closed)(void *data,
-                                                              char *signal,
-                                                              char *type_data,
+                                                              const char *signal,
+                                                              const char *type_data,
                                                               void *signal_data),
-                         int (*callback_load_file)(void *data, char *filename));
+                         int (*callback_load_file)(void *data, const char *filename));
 extern char *script_ptr2str (void *pointer);
-extern void *script_str2ptr (char *pointer_str);
+extern void *script_str2ptr (const char *pointer_str);
 extern void script_auto_load (struct t_weechat_plugin *weechat_plugin,
-                              int (*callback)(void *data, char *filename));
+                              int (*callback)(void *data, const char *filename));
 extern struct t_plugin_script *script_search (struct t_weechat_plugin *weechat_plugin,
                                               struct t_plugin_script *scripts,
-                                              char *name);
+                                              const char *name);
 extern char *script_search_full_name (struct t_weechat_plugin *weechat_plugin,
-                                      char *filename);
+                                      const char *filename);
 extern struct t_plugin_script *script_add (struct t_weechat_plugin *weechat_plugin,
                                            struct t_plugin_script **scripts,
-                                           char *filename, char *name,
-                                           char *author, char *version,
-                                           char *license, char *description,
-                                           char *shutdown_func, char *charset);
+                                           const char *filename, const char *name,
+                                           const char *author, const char *version,
+                                           const char *license, const char *description,
+                                           const char *shutdown_func, const char *charset);
 extern void script_remove_buffer_callbacks (struct t_plugin_script *scripts,
                                             struct t_gui_buffer *buffer);
 extern void script_remove (struct t_weechat_plugin *weechat_plugin,
@@ -98,7 +98,7 @@ extern void script_completion (struct t_weechat_plugin *weechat_plugin,
                                struct t_plugin_script *scripts);
 extern void script_display_list (struct t_weechat_plugin *weechat_plugin,
                                  struct t_plugin_script *scripts,
-                                 char *name, int full);
+                                 const char *name, int full);
 extern void script_print_log (struct t_weechat_plugin *weechat_plugin,
                               struct t_plugin_script *scripts);