api: add argument "flags" in function hdata_new_list

25 files changed, 236 insertions, 91 deletions

diff --git a/ChangeLog.asciidoc b/ChangeLog.asciidoc
index c70dda39c..1fa8d3012 100644
--- a/ChangeLog.asciidoc
+++ b/ChangeLog.asciidoc
@@ -82,6 +82,7 @@ http://weechat.org/files/releasenotes/ReleaseNotes-devel.html[release notes]
 * core: add signals "key_combo_{default|search|cursor}"
 * core: display a warning in case of inconsistency between the options
   weechat.look.save_{config|layout}_on_exit
+* api: add argument "flags" in function hdata_new_list
 * api: change type of arguments displayed/highlight in hook_print callback from
   string to integer (in scripts)
 * api: allow wildcard "*" inside the mask in function string_match
diff --git a/doc/en/weechat_plugin_api.en.txt b/doc/en/weechat_plugin_api.en.txt
index c28f3aa78..1e322c51d 100644
--- a/doc/en/weechat_plugin_api.en.txt
+++ b/doc/en/weechat_plugin_api.en.txt
@@ -13547,7 +13547,7 @@ This function is not available in scripting API.
 
 ==== weechat_hdata_new_list
 
-_WeeChat ≥ 0.3.6._
+_WeeChat ≥ 0.3.6, updated in 1.0._
 
 Create a new list pointer in hdata.
 
@@ -13555,7 +13555,7 @@ Prototype:
 
 [source,C]
 ----
-void weechat_hdata_new_list (struct t_hdata *hdata, const char *name, void *pointer);
+void weechat_hdata_new_list (struct t_hdata *hdata, const char *name, void *pointer, int flags);
 ----
 
 Arguments:
@@ -13563,6 +13563,8 @@ Arguments:
 * 'hdata': hdata pointer
 * 'name': variable name
 * 'pointer': list pointer
+* 'flags': combination of following values: _(WeeChat ≥ 1.0)_
+** 'WEECHAT_HDATA_LIST_CHECK_POINTERS': list used to check pointers
 
 C example:
 
@@ -13590,16 +13592,16 @@ weechat_hdata_new_var (hdata, "string_split", offsetof (struct t_myplugin_list,
 weechat_hdata_new_var (hdata, "prev", offsetof (struct t_myplugin_list, prev), WEECHAT_HDATA_POINTER, NULL, "myplugin_list");
 weechat_hdata_new_var (hdata, "next", offsetof (struct t_myplugin_list, next), WEECHAT_HDATA_POINTER, NULL, "myplugin_list");
 
-weechat_hdata_new_list (hdata, "buffers", &buffers);
-weechat_hdata_new_list (hdata, "last_buffer", &last_buffer);
+weechat_hdata_new_list (hdata, "buffers", &buffers, WEECHAT_HDATA_LIST_CHECK_POINTERS);
+weechat_hdata_new_list (hdata, "last_buffer", &last_buffer, 0);
 ----
 
 The macro "WEECHAT_HDATA_LIST" can be used to shorten code:
 
 [source,C]
 ----
-WEECHAT_HDATA_LIST(buffers);
-WEECHAT_HDATA_LIST(last_buffer);
+WEECHAT_HDATA_LIST(buffers, WEECHAT_HDATA_LIST_CHECK_POINTERS);
+WEECHAT_HDATA_LIST(last_buffer, 0);
 ----
 
 [NOTE]
@@ -14037,7 +14039,7 @@ buffers = weechat.hdata_get_list(hdata, "gui_buffers")
 
 ==== weechat_hdata_check_pointer
 
-_WeeChat ≥ 0.3.7._
+_WeeChat ≥ 0.3.7, updated in 1.0._
 
 Check if a pointer is valid for a hdata and a list pointer.
 
@@ -14051,7 +14053,10 @@ int weechat_hdata_check_pointer (struct t_hdata *hdata, void *list, void *pointe
 Arguments:
 
 * 'hdata': hdata pointer
-* 'list': list pointer
+* 'list': list pointer; if NULL _(WeeChat ≥ 1.0)_, the pointer is checked with
+  the lists in hdata that have flag "check pointers" (see
+  <<_weechat_hdata_new_list,weechat_hdata_new_list>>), and if no such list
+  exists, the pointer is considered as valid
 * 'pointer': pointer to check
 
 Return value:
diff --git a/doc/fr/weechat_plugin_api.fr.txt b/doc/fr/weechat_plugin_api.fr.txt
index 4dd6b7925..48fc2245a 100644
--- a/doc/fr/weechat_plugin_api.fr.txt
+++ b/doc/fr/weechat_plugin_api.fr.txt
@@ -13811,7 +13811,7 @@ Cette fonction n'est pas disponible dans l'API script.
 
 ==== weechat_hdata_new_list
 
-_WeeChat ≥ 0.3.6._
+_WeeChat ≥ 0.3.6, mis à jour dans la 1.0._
 
 Créer un nouveau pointer vers une liste dans le hdata.
 
@@ -13819,7 +13819,7 @@ Prototype :
 
 [source,C]
 ----
-void weechat_hdata_new_list (struct t_hdata *hdata, const char *name, void *pointer);
+void weechat_hdata_new_list (struct t_hdata *hdata, const char *name, void *pointer, int flags);
 ----
 
 Paramètres :
@@ -13827,6 +13827,9 @@ Paramètres :
 * 'hdata' : pointeur vers le hdata
 * 'name' : nom de la variable
 * 'pointer' : pointeur vers la liste
+* 'flags' : combinaison des valeurs suivantes : _(WeeChat ≥ 1.0)_
+** 'WEECHAT_HDATA_LIST_CHECK_POINTERS' : liste utilisée pour vérifier les
+   pointeurs
 
 Exemple en C :
 
@@ -13854,16 +13857,16 @@ weechat_hdata_new_var (hdata, "string_split", offsetof (struct t_myplugin_list,
 weechat_hdata_new_var (hdata, "prev", offsetof (struct t_myplugin_list, prev), WEECHAT_HDATA_POINTER, NULL, "myplugin_list");
 weechat_hdata_new_var (hdata, "next", offsetof (struct t_myplugin_list, next), WEECHAT_HDATA_POINTER, NULL, "myplugin_list");
 
-weechat_hdata_new_list (hdata, "buffers", &buffers);
-weechat_hdata_new_list (hdata, "last_buffer", &last_buffer);
+weechat_hdata_new_list (hdata, "buffers", &buffers, WEECHAT_HDATA_LIST_CHECK_POINTERS);
+weechat_hdata_new_list (hdata, "last_buffer", &last_buffer, 0);
 ----
 
 La macro "WEECHAT_HDATA_LIST" peut être utilisée pour raccourcir le code :
 
 [source,C]
 ----
-WEECHAT_HDATA_LIST(buffers);
-WEECHAT_HDATA_LIST(last_buffer);
+WEECHAT_HDATA_LIST(buffers, WEECHAT_HDATA_LIST_CHECK_POINTERS);
+WEECHAT_HDATA_LIST(last_buffer, 0);
 ----
 
 [NOTE]
@@ -14305,7 +14308,7 @@ buffers = weechat.hdata_get_list(hdata, "gui_buffers")
 
 ==== weechat_hdata_check_pointer
 
-_WeeChat ≥ 0.3.7._
+_WeeChat ≥ 0.3.7, mis à jour dans la 1.0._
 
 Vérifier si un pointeur est valide pour un hdata et un pointeur de liste.
 
@@ -14319,7 +14322,11 @@ int weechat_hdata_check_pointer (struct t_hdata *hdata, void *list, void *pointe
 Paramètres :
 
 * 'hdata' : pointeur vers le hdata
-* 'list' : pointeur vers une liste
+* 'list' : pointeur vers une liste; si NULL _(WeeChat ≥ 1.0)_, le pointeur est
+  vérifié avec les listes dans le hdata qui ont le drapeau
+  "vérifier les pointeurs" (voir
+  <<_weechat_hdata_new_list,weechat_hdata_new_list>>), et s'il n'y a pas de
+  telle liste, le pointeur est considéré comme valide
 * 'pointer' : pointeur à vérifier
 
 Valeur de retour :
diff --git a/doc/it/weechat_plugin_api.it.txt b/doc/it/weechat_plugin_api.it.txt
index 9e8798678..b14b0cfc7 100644
--- a/doc/it/weechat_plugin_api.it.txt
+++ b/doc/it/weechat_plugin_api.it.txt
@@ -13931,7 +13931,8 @@ Questa funzione non è disponibile nelle API per lo scripting.
 
 ==== weechat_hdata_new_list
 
-_WeeChat ≥ 0.3.6._
+// TRANSLATION MISSING
+_WeeChat ≥ 0.3.6, updated in 1.0._
 
 Crea una nuovo puntatore alla lista in hdata.
 
@@ -13939,7 +13940,7 @@ Prototipo:
 
 [source,C]
 ----
-void weechat_hdata_new_list (struct t_hdata *hdata, const char *name, void *pointer);
+void weechat_hdata_new_list (struct t_hdata *hdata, const char *name, void *pointer, int flags);
 ----
 
 Argomenti:
@@ -13947,6 +13948,9 @@ Argomenti:
 * 'hdata': puntatore hdata
 * 'name': nome delal variabile
 * 'pointer': puntatore alla lista
+// TRANSLATION MISSING
+* 'flags': combination of following values: _(WeeChat ≥ 1.0)_
+** 'WEECHAT_HDATA_LIST_CHECK_POINTERS': list used to check pointers
 
 Esempio in C:
 
@@ -13974,16 +13978,16 @@ weechat_hdata_new_var (hdata, "string_split", offsetof (struct t_myplugin_list,
 weechat_hdata_new_var (hdata, "prev", offsetof (struct t_myplugin_list, prev), WEECHAT_HDATA_POINTER, NULL, "myplugin_list");
 weechat_hdata_new_var (hdata, "next", offsetof (struct t_myplugin_list, next), WEECHAT_HDATA_POINTER, NULL, "myplugin_list");
 
-weechat_hdata_new_list (hdata, "buffers", &buffers);
-weechat_hdata_new_list (hdata, "last_buffer", &last_buffer);
+weechat_hdata_new_list (hdata, "buffers", &buffers, WEECHAT_HDATA_LIST_CHECK_POINTERS);
+weechat_hdata_new_list (hdata, "last_buffer", &last_buffer, 0);
 ----
 
 La macro "WEECHAT_HDATA_LIST" può essere usata per accorciare il codice:
 
 [source,C]
 ----
-WEECHAT_HDATA_LIST(buffers);
-WEECHAT_HDATA_LIST(last_buffer);
+WEECHAT_HDATA_LIST(buffers, WEECHAT_HDATA_LIST_CHECK_POINTERS);
+WEECHAT_HDATA_LIST(last_buffer, 0);
 ----
 
 [NOTE]
@@ -14428,7 +14432,8 @@ buffers = weechat.hdata_get_list(hdata, "gui_buffers")
 
 ==== weechat_hdata_check_pointer
 
-_WeeChat ≥ 0.3.7._
+// TRANSLATION MISSING
+_WeeChat ≥ 0.3.7, updated in 1.0._
 
 Verifica se un puntatore è valido per un hdata e un puntatore della lista.
 
@@ -14442,7 +14447,11 @@ int weechat_hdata_check_pointer (struct t_hdata *hdata, void *list, void *pointe
 Argomenti:
 
 * 'hdata': puntatore hdata
-* 'list': puntatore alla lista
+// TRANSLATION MISSING
+* 'list': puntatore alla lista; if NULL _(WeeChat ≥ 1.0)_, the pointer is
+  checked with the lists in hdata that have flag "check pointers" (see
+  <<_weechat_hdata_new_list,weechat_hdata_new_list>>), and if no such list
+  exists, the pointer is considered as valid
 * 'pointer': puntatore da verificare
 
 Valore restituito:
diff --git a/doc/ja/weechat_plugin_api.ja.txt b/doc/ja/weechat_plugin_api.ja.txt
index a42236ff7..f9875e64d 100644
--- a/doc/ja/weechat_plugin_api.ja.txt
+++ b/doc/ja/weechat_plugin_api.ja.txt
@@ -13538,7 +13538,8 @@ WEECHAT_HDATA_VAR(struct t_myplugin_list, next, POINTER, 0, NULL, "myplugin_list
 
 ==== weechat_hdata_new_list
 
-_WeeChat バージョン 0.3.6 以上で利用可。_
+// TRANSLATION MISSING
+_WeeChat ≥ 0.3.6, updated in 1.0._
 
 hdata に新しいリストへのポインタを作成。
 
@@ -13546,7 +13547,7 @@ hdata に新しいリストへのポインタを作成。
 
 [source,C]
 ----
-void weechat_hdata_new_list (struct t_hdata *hdata, const char *name, void *pointer);
+void weechat_hdata_new_list (struct t_hdata *hdata, const char *name, void *pointer, int flags);
 ----
 
 引数:
@@ -13554,6 +13555,9 @@ void weechat_hdata_new_list (struct t_hdata *hdata, const char *name, void *poin
 * 'hdata': hdata へのポインタ
 * 'name': 変数名
 * 'pointer': リストへのポインタ
+// TRANSLATION MISSING
+* 'flags': combination of following values: _(WeeChat ≥ 1.0)_
+** 'WEECHAT_HDATA_LIST_CHECK_POINTERS': list used to check pointers
 
 C 言語での使用例:
 
@@ -13581,16 +13585,16 @@ weechat_hdata_new_var (hdata, "string_split", offsetof (struct t_myplugin_list,
 weechat_hdata_new_var (hdata, "prev", offsetof (struct t_myplugin_list, prev), WEECHAT_HDATA_POINTER, NULL, "myplugin_list");
 weechat_hdata_new_var (hdata, "next", offsetof (struct t_myplugin_list, next), WEECHAT_HDATA_POINTER, NULL, "myplugin_list");
 
-weechat_hdata_new_list (hdata, "buffers", &buffers);
-weechat_hdata_new_list (hdata, "last_buffer", &last_buffer);
+weechat_hdata_new_list (hdata, "buffers", &buffers, WEECHAT_HDATA_LIST_CHECK_POINTERS);
+weechat_hdata_new_list (hdata, "last_buffer", &last_buffer, 0);
 ----
 
 コードを短くするためにはマクロ "WEECHAT_HDATA_LIST" を使います。
 
 [source,C]
 ----
-WEECHAT_HDATA_LIST(buffers);
-WEECHAT_HDATA_LIST(last_buffer);
+WEECHAT_HDATA_LIST(buffers, WEECHAT_HDATA_LIST_CHECK_POINTERS);
+WEECHAT_HDATA_LIST(last_buffer, 0);
 ----
 
 [NOTE]
@@ -14028,7 +14032,8 @@ buffers = weechat.hdata_get_list(hdata, "gui_buffers")
 
 ==== weechat_hdata_check_pointer
 
-_WeeChat バージョン 0.3.7 以上で利用可。_
+// TRANSLATION MISSING
+_WeeChat ≥ 0.3.7, updated in 1.0._
 
 hdata とリストへのポインタを使ってポインタの妥当性を確認する。
 
@@ -14042,7 +14047,11 @@ int weechat_hdata_check_pointer (struct t_hdata *hdata, void *list, void *pointe
 引数:
 
 * 'hdata': hdata へのポインタ
-* 'list': リストへのポインタ
+// TRANSLATION MISSING
+* 'list': list pointer; if NULL _(WeeChat ≥ 1.0)_, the pointer is checked with
+  the lists in hdata that have flag "check pointers" (see
+  <<_weechat_hdata_new_list,weechat_hdata_new_list>>), and if no such list
+  exists, the pointer is considered as valid
 * 'pointer': 確認するポインタ
 
 戻り値:
diff --git a/src/core/wee-config-file.c b/src/core/wee-config-file.c
index 0017a2c2b..7c313ee16 100644
--- a/src/core/wee-config-file.c
+++ b/src/core/wee-config-file.c
@@ -2718,8 +2718,8 @@ config_file_hdata_config_file_cb (void *data, const char *hdata_name)
         HDATA_VAR(struct t_config_file, last_section, POINTER, 0, NULL, "config_section");
         HDATA_VAR(struct t_config_file, prev_config, POINTER, 0, NULL, hdata_name);
         HDATA_VAR(struct t_config_file, next_config, POINTER, 0, NULL, hdata_name);
-        HDATA_LIST(config_files);
-        HDATA_LIST(last_config_file);
+        HDATA_LIST(config_files, WEECHAT_HDATA_LIST_CHECK_POINTERS);
+        HDATA_LIST(last_config_file, 0);
     }
     return hdata;
 }
diff --git a/src/core/wee-hdata.c b/src/core/wee-hdata.c
index c13f92e2c..a96956ebb 100644
--- a/src/core/wee-hdata.c
+++ b/src/core/wee-hdata.c
@@ -73,6 +73,21 @@ hdata_free_var (struct t_hashtable *hashtable,
 }
 
 /*
+ * Frees a hdata list.
+ */
+
+void
+hdata_free_list (struct t_hashtable *hashtable,
+                 const void *key, void *value)
+{
+    /* make C compiler happy */
+    (void) hashtable;
+    (void) key;
+
+    free (value);
+}
+
+/*
  * Creates a new hdata.
  *
  * Returns pointer to new hdata, NULL if error.
@@ -111,6 +126,7 @@ hdata_new (struct t_weechat_plugin *plugin, const char *hdata_name,
                                               WEECHAT_HASHTABLE_POINTER,
                                               NULL,
                                               NULL);
+        new_hdata->hash_list->callback_free_value = &hdata_free_list;
         hashtable_set (weechat_hdata, hdata_name, new_hdata);
         new_hdata->create_allowed = create_allowed;
         new_hdata->delete_allowed = delete_allowed;
@@ -153,12 +169,21 @@ hdata_new_var (struct t_hdata *hdata, const char *name, int offset, int type,
  */
 
 void
-hdata_new_list (struct t_hdata *hdata, const char *name, void *pointer)
+hdata_new_list (struct t_hdata *hdata, const char *name, void *pointer,
+                int flags)
 {
+    struct t_hdata_list *list;
+
     if (!hdata || !name)
         return;
 
-    hashtable_set (hdata->hash_list, name, pointer);
+    list = malloc (sizeof (*list));
+    if (list)
+    {
+        list->pointer = pointer;
+        list->flags = flags;
+        hashtable_set (hdata->hash_list, name, list);
+    }
 }
 
 /*
@@ -399,20 +424,20 @@ hdata_get_var_at_offset (struct t_hdata *hdata, void *pointer, int offset)
 void *
 hdata_get_list (struct t_hdata *hdata, const char *name)
 {
-    void *ptr_value;
+    struct t_hdata_list *ptr_list;
 
     if (!hdata || !name)
         return NULL;
 
-    ptr_value = hashtable_get (hdata->hash_list, name);
-    if (ptr_value)
-        return *((void **)ptr_value);
+    ptr_list = hashtable_get (hdata->hash_list, name);
+    if (ptr_list)
+        return *((void **)(ptr_list->pointer));
 
     return NULL;
 }
 
 /*
- * Checks if a pointer is valid for a given hdata/list.
+ * Checks if a pointer is in the list.
  *
  * Returns:
  *   1: pointer exists in list
@@ -420,15 +445,16 @@ hdata_get_list (struct t_hdata *hdata, const char *name)
  */
 
 int
-hdata_check_pointer (struct t_hdata *hdata, void *list, void *pointer)
+hdata_check_pointer_in_list (struct t_hdata *hdata, void *list, void *pointer)
 {
     void *ptr_current;
 
-    if (!hdata || !list || !pointer)
+    if (!hdata || !pointer)
         return 0;
 
     if (pointer == list)
         return 1;
+
     ptr_current = list;
     while (ptr_current)
     {
@@ -441,6 +467,83 @@ hdata_check_pointer (struct t_hdata *hdata, void *list, void *pointer)
 }
 
 /*
+ * Checks if a pointer is in a list with flag "check_pointers".
+ */
+
+void
+hdata_check_pointer_map_cb (void *data, struct t_hashtable *hashtable,
+                            const void *key, const void *value)
+{
+    void **pointers, *pointer, **num_lists, **found;
+    struct t_hdata *ptr_hdata;
+    struct t_hdata_list *ptr_list;
+
+    /* make C compiler happy */
+    (void) hashtable;
+    (void) key;
+
+    pointers = (void **)data;
+    ptr_hdata = pointers[0];
+    pointer = pointers[1];
+    num_lists = &pointers[2];
+    found = &pointers[3];
+
+    /* pointer already found in another list? just exit */
+    if (*found)
+        return;
+
+    ptr_list = (struct t_hdata_list *)value;
+    if (!ptr_list || !(ptr_list->flags & WEECHAT_HDATA_LIST_CHECK_POINTERS))
+        return;
+
+    *found = (void *)((unsigned long int)hdata_check_pointer_in_list (
+                          ptr_hdata,
+                          *((void **)(ptr_list->pointer)),
+                          pointer));
+    (*num_lists)++;
+}
+
+/*
+ * Checks if a pointer is valid for a given hdata/list.
+ *
+ * If argument "list" is NULL, the check is made with all lists in hdata
+ * that have flag "check_pointers". If no list is defined with this flag,
+ * the pointer is considered valid (so this function returns 1); if the
+ * pointer is not found in any list, this function returns 0.
+ *
+ * Returns:
+ *   1: pointer exists in the given list (or a list with check_pointers flag)
+ *   0: pointer does not exist
+ */
+
+int
+hdata_check_pointer (struct t_hdata *hdata, void *list, void *pointer)
+{
+    void *pointers[4];
+
+    if (!hdata || !pointer)
+        return 0;
+
+    if (list)
+    {
+        /* search pointer in the given list */
+        return hdata_check_pointer_in_list (hdata, list, pointer);
+    }
+    else
+    {
+        /* search pointer in all lists with flag "check_pointers" */
+        pointers[0] = hdata;
+        pointers[1] = pointer;
+        pointers[2] = 0;        /* number of lists with flag check_pointers */
+        pointers[3] = 0;        /* pointer found? (0/1) */
+        hashtable_map (hdata->hash_list,
+                       &hdata_check_pointer_map_cb,
+                       pointers);
+        return ((pointers[2] == 0) || pointers[3]) ? 1 : 0;
+    }
+}
+
+/*
  * Moves pointer to another element in list.
  */
 
diff --git a/src/core/wee-hdata.h b/src/core/wee-hdata.h
index abbd505e9..68523f8d4 100644
--- a/src/core/wee-hdata.h
+++ b/src/core/wee-hdata.h
@@ -25,7 +25,8 @@
     hdata_new_var (hdata, #__name, offsetof (__struct, __name),         \
                    WEECHAT_HDATA_##__type, __update_allowed,            \
                    __array_size, __hdata_name)
-#define HDATA_LIST(__name) hdata_new_list (hdata, #__name, &(__name));
+#define HDATA_LIST(__name, __flags)                                     \
+    hdata_new_list (hdata, #__name, &(__name), __flags);
 
 struct t_hdata_var
 {
@@ -36,6 +37,12 @@ struct t_hdata_var
     char *hdata_name;                  /* hdata name                        */
 };
 
+struct t_hdata_list
+{
+    void *pointer;                     /* list pointer                      */
+    int flags;                         /* flags for list                    */
+};
+
 struct t_hdata
 {
     char *name;                        /* name of hdata                     */
@@ -79,7 +86,7 @@ extern void hdata_new_var (struct t_hdata *hdata, const char *name, int offset,
                            int type, int update_allowed, const char *array_size,
                            const char *hdata_name);
 extern void hdata_new_list (struct t_hdata *hdata, const char *name,
-                            void *pointer);
+                            void *pointer, int flags);
 extern int hdata_get_var_offset (struct t_hdata *hdata, const char *name);
 extern int hdata_get_var_type (struct t_hdata *hdata, const char *name);
 extern const char *hdata_get_var_type_string (struct t_hdata *hdata,
diff --git a/src/core/wee-proxy.c b/src/core/wee-proxy.c
index 08b6190a4..34b16b97c 100644
--- a/src/core/wee-proxy.c
+++ b/src/core/wee-proxy.c
@@ -636,8 +636,8 @@ proxy_hdata_proxy_cb (void *data, const char *hdata_name)
         HDATA_VAR(struct t_proxy, options, POINTER, 0, NULL, NULL);
         HDATA_VAR(struct t_proxy, prev_proxy, POINTER, 0, NULL, hdata_name);
         HDATA_VAR(struct t_proxy, next_proxy, POINTER, 0, NULL, hdata_name);
-        HDATA_LIST(weechat_proxies);
-        HDATA_LIST(last_weechat_proxy);
+        HDATA_LIST(weechat_proxies, WEECHAT_HDATA_LIST_CHECK_POINTERS);
+        HDATA_LIST(last_weechat_proxy, 0);
     }
     return hdata;
 }
diff --git a/src/gui/gui-bar-item.c b/src/gui/gui-bar-item.c
index 3c72973ba..4f6d74264 100644
--- a/src/gui/gui-bar-item.c
+++ b/src/gui/gui-bar-item.c
@@ -2174,8 +2174,8 @@ gui_bar_item_hdata_bar_item_cb (void *data, const char *hdata_name)
         HDATA_VAR(struct t_gui_bar_item, build_callback_data, POINTER, 0, NULL, NULL);
         HDATA_VAR(struct t_gui_bar_item, prev_item, POINTER, 0, NULL, hdata_name);
         HDATA_VAR(struct t_gui_bar_item, next_item, POINTER, 0, NULL, hdata_name);
-        HDATA_LIST(gui_bar_items);
-        HDATA_LIST(last_gui_bar_item);
+        HDATA_LIST(gui_bar_items, WEECHAT_HDATA_LIST_CHECK_POINTERS);
+        HDATA_LIST(last_gui_bar_item, 0);
     }
     return hdata;
 }
diff --git a/src/gui/gui-bar.c b/src/gui/gui-bar.c
index 2d255ba8c..58ed2c52b 100644
--- a/src/gui/gui-bar.c
+++ b/src/gui/gui-bar.c
@@ -2280,8 +2280,8 @@ gui_bar_hdata_bar_cb (void *data, const char *hdata_name)
         HDATA_VAR(struct t_gui_bar, bar_refresh_needed, INTEGER, 0, NULL, NULL);
         HDATA_VAR(struct t_gui_bar, prev_bar, POINTER, 0, NULL, hdata_name);
         HDATA_VAR(struct t_gui_bar, next_bar, POINTER, 0, NULL, hdata_name);
-        HDATA_LIST(gui_bars);
-        HDATA_LIST(last_gui_bar);
+        HDATA_LIST(gui_bars, WEECHAT_HDATA_LIST_CHECK_POINTERS);
+        HDATA_LIST(last_gui_bar, 0);
     }
     return hdata;
 }
diff --git a/src/gui/gui-buffer.c b/src/gui/gui-buffer.c
index ae4a2a995..2bc130961 100644
--- a/src/gui/gui-buffer.c
+++ b/src/gui/gui-buffer.c
@@ -4024,9 +4024,9 @@ gui_buffer_hdata_buffer_cb (void *data, const char *hdata_name)
         HDATA_VAR(struct t_gui_buffer, local_variables, HASHTABLE, 0, NULL, NULL);
         HDATA_VAR(struct t_gui_buffer, prev_buffer, POINTER, 0, NULL, hdata_name);
         HDATA_VAR(struct t_gui_buffer, next_buffer, POINTER, 0, NULL, hdata_name);
-        HDATA_LIST(gui_buffers);
-        HDATA_LIST(last_gui_buffer);
-        HDATA_LIST(gui_buffer_last_displayed);
+        HDATA_LIST(gui_buffers, WEECHAT_HDATA_LIST_CHECK_POINTERS);
+        HDATA_LIST(last_gui_buffer, 0);
+        HDATA_LIST(gui_buffer_last_displayed, 0);
     }
     return hdata;
 }
@@ -4074,8 +4074,8 @@ gui_buffer_hdata_buffer_visited_cb (void *data, const char *hdata_name)
         HDATA_VAR(struct t_gui_buffer_visited, buffer, POINTER, 0, NULL, "buffer");
         HDATA_VAR(struct t_gui_buffer_visited, prev_buffer, POINTER, 0, NULL, hdata_name);
         HDATA_VAR(struct t_gui_buffer_visited, next_buffer, POINTER, 0, NULL, hdata_name);
-        HDATA_LIST(gui_buffers_visited);
-        HDATA_LIST(last_gui_buffer_visited);
+        HDATA_LIST(gui_buffers_visited, WEECHAT_HDATA_LIST_CHECK_POINTERS);
+        HDATA_LIST(last_gui_buffer_visited, 0);
     }
     return hdata;
 }
diff --git a/src/gui/gui-filter.c b/src/gui/gui-filter.c
index b435e829b..de6005405 100644
--- a/src/gui/gui-filter.c
+++ b/src/gui/gui-filter.c
@@ -516,8 +516,8 @@ gui_filter_hdata_filter_cb (void *data, const char *hdata_name)
         HDATA_VAR(struct t_gui_filter, regex_message, POINTER, 0, NULL, NULL);
         HDATA_VAR(struct t_gui_filter, prev_filter, POINTER, 0, NULL, hdata_name);
         HDATA_VAR(struct t_gui_filter, next_filter, POINTER, 0, NULL, hdata_name);
-        HDATA_LIST(gui_filters);
-        HDATA_LIST(last_gui_filter);
+        HDATA_LIST(gui_filters, WEECHAT_HDATA_LIST_CHECK_POINTERS);
+        HDATA_LIST(last_gui_filter, 0);
     }
     return hdata;
 }
diff --git a/src/gui/gui-history.c b/src/gui/gui-history.c
index cd8f02966..b3e415cf8 100644
--- a/src/gui/gui-history.c
+++ b/src/gui/gui-history.c
@@ -291,8 +291,8 @@ gui_history_hdata_history_cb (void *data, const char *hdata_name)
         HDATA_VAR(struct t_gui_history, text, STRING, 0, NULL, NULL);
         HDATA_VAR(struct t_gui_history, prev_history, POINTER, 0, NULL, hdata_name);
         HDATA_VAR(struct t_gui_history, next_history, POINTER, 0, NULL, hdata_name);
-        HDATA_LIST(gui_history);
-        HDATA_LIST(last_gui_history);
+        HDATA_LIST(gui_history, WEECHAT_HDATA_LIST_CHECK_POINTERS);
+        HDATA_LIST(last_gui_history, 0);
     }
     return hdata;
 }
diff --git a/src/gui/gui-hotlist.c b/src/gui/gui-hotlist.c
index 3f8dbd319..a28f596f3 100644
--- a/src/gui/gui-hotlist.c
+++ b/src/gui/gui-hotlist.c
@@ -540,8 +540,8 @@ gui_hotlist_hdata_hotlist_cb (void *data, const char *hdata_name)
         HDATA_VAR(struct t_gui_hotlist, count, INTEGER, 0, GUI_HOTLIST_NUM_PRIORITIES_STR, NULL);
         HDATA_VAR(struct t_gui_hotlist, prev_hotlist, POINTER, 0, NULL, hdata_name);
         HDATA_VAR(struct t_gui_hotlist, next_hotlist, POINTER, 0, NULL, hdata_name);
-        HDATA_LIST(gui_hotlist);
-        HDATA_LIST(last_gui_hotlist);
+        HDATA_LIST(gui_hotlist, WEECHAT_HDATA_LIST_CHECK_POINTERS);
+        HDATA_LIST(last_gui_hotlist, 0);
     }
     return hdata;
 }
diff --git a/src/gui/gui-key.c b/src/gui/gui-key.c
index daf0cae17..2b408a129 100644
--- a/src/gui/gui-key.c
+++ b/src/gui/gui-key.c
@@ -1871,22 +1871,22 @@ gui_key_hdata_key_cb (void *data, const char *hdata_name)
                       "gui_keys%s%s",
                       (i == GUI_KEY_CONTEXT_DEFAULT) ? "" : "_",
                       (i == GUI_KEY_CONTEXT_DEFAULT) ? "" : gui_key_context_string[i]);
-            hdata_new_list(hdata, str_list, &gui_keys[i]);
+            hdata_new_list(hdata, str_list, &gui_keys[i], 0);
             snprintf (str_list, sizeof (str_list),
                       "last_gui_key%s%s",
                       (i == GUI_KEY_CONTEXT_DEFAULT) ? "" : "_",
                       (i == GUI_KEY_CONTEXT_DEFAULT) ? "" : gui_key_context_string[i]);
-            hdata_new_list(hdata, str_list, &last_gui_key[i]);
+            hdata_new_list(hdata, str_list, &last_gui_key[i], 0);
             snprintf (str_list, sizeof (str_list),
                       "gui_default_keys%s%s",
                       (i == GUI_KEY_CONTEXT_DEFAULT) ? "" : "_",
                       (i == GUI_KEY_CONTEXT_DEFAULT) ? "" : gui_key_context_string[i]);
-            hdata_new_list(hdata, str_list, &gui_default_keys[i]);
+            hdata_new_list(hdata, str_list, &gui_default_keys[i], 0);
             snprintf (str_list, sizeof (str_list),
                       "last_gui_default_key%s%s",
                       (i == GUI_KEY_CONTEXT_DEFAULT) ? "" : "_",
                       (i == GUI_KEY_CONTEXT_DEFAULT) ? "" : gui_key_context_string[i]);
-            hdata_new_list(hdata, str_list, &last_gui_default_key[i]);
+            hdata_new_list(hdata, str_list, &last_gui_default_key[i], 0);
         }
     }
     return hdata;
diff --git a/src/gui/gui-layout.c b/src/gui/gui-layout.c
index 4ca76d213..d7bf7179a 100644
--- a/src/gui/gui-layout.c
+++ b/src/gui/gui-layout.c
@@ -954,9 +954,9 @@ gui_layout_hdata_layout_cb (void *data, const char *hdata_name)
         HDATA_VAR(struct t_gui_layout, internal_id_current_window, INTEGER, 0, NULL, NULL);
         HDATA_VAR(struct t_gui_layout, prev_layout, POINTER, 0, NULL, hdata_name);
         HDATA_VAR(struct t_gui_layout, next_layout, POINTER, 0, NULL, hdata_name);
-        HDATA_LIST(gui_layouts);
-        HDATA_LIST(last_gui_layout);
-        HDATA_LIST(gui_layout_current);
+        HDATA_LIST(gui_layouts, WEECHAT_HDATA_LIST_CHECK_POINTERS);
+        HDATA_LIST(last_gui_layout, 0);
+        HDATA_LIST(gui_layout_current, 0);
     }
     return hdata;
 }
diff --git a/src/gui/gui-window.c b/src/gui/gui-window.c
index 7345e669f..e368636a9 100644
--- a/src/gui/gui-window.c
+++ b/src/gui/gui-window.c
@@ -1760,9 +1760,9 @@ gui_window_hdata_window_cb (void *data, const char *hdata_name)
         HDATA_VAR(struct t_gui_window, ptr_tree, POINTER, 0, NULL, "window_tree");
         HDATA_VAR(struct t_gui_window, prev_window, POINTER, 0, NULL, hdata_name);
         HDATA_VAR(struct t_gui_window, next_window, POINTER, 0, NULL, hdata_name);
-        HDATA_LIST(gui_windows);
-        HDATA_LIST(last_gui_window);
-        HDATA_LIST(gui_current_window);
+        HDATA_LIST(gui_windows, WEECHAT_HDATA_LIST_CHECK_POINTERS);
+        HDATA_LIST(last_gui_window, 0);
+        HDATA_LIST(gui_current_window, 0);
     }
     return hdata;
 }
@@ -1817,7 +1817,7 @@ gui_window_hdata_window_tree_cb (void *data, const char *hdata_name)
         HDATA_VAR(struct t_gui_window_tree, child1, POINTER, 0, NULL, hdata_name);
         HDATA_VAR(struct t_gui_window_tree, child2, POINTER, 0, NULL, hdata_name);
         HDATA_VAR(struct t_gui_window_tree, window, POINTER, 0, NULL, "window");
-        HDATA_LIST(gui_windows_tree);
+        HDATA_LIST(gui_windows_tree, 0);
     }
     return hdata;
 }
diff --git a/src/plugins/irc/irc-ignore.c b/src/plugins/irc/irc-ignore.c
index 2292a16e6..1ae57eeeb 100644
--- a/src/plugins/irc/irc-ignore.c
+++ b/src/plugins/irc/irc-ignore.c
@@ -326,8 +326,8 @@ irc_ignore_hdata_ignore_cb (void *data, const char *hdata_name)
         WEECHAT_HDATA_VAR(struct t_irc_ignore, channel, STRING, 0, NULL, NULL);
         WEECHAT_HDATA_VAR(struct t_irc_ignore, prev_ignore, POINTER, 0, NULL, hdata_name);
         WEECHAT_HDATA_VAR(struct t_irc_ignore, next_ignore, POINTER, 0, NULL, hdata_name);
-        WEECHAT_HDATA_LIST(irc_ignore_list);
-        WEECHAT_HDATA_LIST(last_irc_ignore);
+        WEECHAT_HDATA_LIST(irc_ignore_list, WEECHAT_HDATA_LIST_CHECK_POINTERS);
+        WEECHAT_HDATA_LIST(last_irc_ignore, 0);
     }
     return hdata;
 }
diff --git a/src/plugins/irc/irc-redirect.c b/src/plugins/irc/irc-redirect.c
index 2d3ab5456..553507967 100644
--- a/src/plugins/irc/irc-redirect.c
+++ b/src/plugins/irc/irc-redirect.c
@@ -1007,8 +1007,8 @@ irc_redirect_hdata_redirect_pattern_cb (void *data, const char *hdata_name)
         WEECHAT_HDATA_VAR(struct t_irc_redirect_pattern, cmd_extra, STRING, 0, NULL, NULL);
         WEECHAT_HDATA_VAR(struct t_irc_redirect_pattern, prev_redirect, POINTER, 0, NULL, hdata_name);
         WEECHAT_HDATA_VAR(struct t_irc_redirect_pattern, next_redirect, POINTER, 0, NULL, hdata_name);
-        WEECHAT_HDATA_LIST(irc_redirect_patterns);
-        WEECHAT_HDATA_LIST(last_irc_redirect_pattern);
+        WEECHAT_HDATA_LIST(irc_redirect_patterns, WEECHAT_HDATA_LIST_CHECK_POINTERS);
+        WEECHAT_HDATA_LIST(last_irc_redirect_pattern, 0);
     }
     return hdata;
 }
diff --git a/src/plugins/irc/irc-server.c b/src/plugins/irc/irc-server.c
index b56451fab..a18f0ec5b 100644
--- a/src/plugins/irc/irc-server.c
+++ b/src/plugins/irc/irc-server.c
@@ -4904,8 +4904,8 @@ irc_server_hdata_server_cb (void *data, const char *hdata_name)
         WEECHAT_HDATA_VAR(struct t_irc_server, last_channel, POINTER, 0, NULL, "irc_channel");
         WEECHAT_HDATA_VAR(struct t_irc_server, prev_server, POINTER, 0, NULL, hdata_name);
         WEECHAT_HDATA_VAR(struct t_irc_server, next_server, POINTER, 0, NULL, hdata_name);
-        WEECHAT_HDATA_LIST(irc_servers);
-        WEECHAT_HDATA_LIST(last_irc_server);
+        WEECHAT_HDATA_LIST(irc_servers, WEECHAT_HDATA_LIST_CHECK_POINTERS);
+        WEECHAT_HDATA_LIST(last_irc_server, 0);
     }
     return hdata;
 }
diff --git a/src/plugins/plugin-script.c b/src/plugins/plugin-script.c
index bffe58e75..678ec1454 100644
--- a/src/plugins/plugin-script.c
+++ b/src/plugins/plugin-script.c
@@ -1380,8 +1380,9 @@ plugin_script_hdata_script (struct t_weechat_plugin *weechat_plugin,
         WEECHAT_HDATA_VAR(struct t_plugin_script, unloading, INTEGER, 0, NULL, NULL);
         WEECHAT_HDATA_VAR(struct t_plugin_script, prev_script, POINTER, 0, NULL, hdata_name);
         WEECHAT_HDATA_VAR(struct t_plugin_script, next_script, POINTER, 0, NULL, hdata_name);
-        weechat_hdata_new_list (hdata, "scripts", scripts);
-        weechat_hdata_new_list (hdata, "last_script", last_script);
+        weechat_hdata_new_list (hdata, "scripts", scripts,
+                                WEECHAT_HDATA_LIST_CHECK_POINTERS);
+        weechat_hdata_new_list (hdata, "last_script", last_script, 0);
     }
     return hdata;
 }
diff --git a/src/plugins/plugin.c b/src/plugins/plugin.c
index f910c8fdc..13eba0a9b 100644
--- a/src/plugins/plugin.c
+++ b/src/plugins/plugin.c
@@ -1247,8 +1247,8 @@ plugin_hdata_plugin_cb (void *data, const char *hdata_name)
         HDATA_VAR(struct t_weechat_plugin, debug, INTEGER, 0, NULL, NULL);
         HDATA_VAR(struct t_weechat_plugin, prev_plugin, POINTER, 0, NULL, hdata_name);
         HDATA_VAR(struct t_weechat_plugin, next_plugin, POINTER, 0, NULL, hdata_name);
-        HDATA_LIST(weechat_plugins);
-        HDATA_LIST(last_weechat_plugin);
+        HDATA_LIST(weechat_plugins, WEECHAT_HDATA_LIST_CHECK_POINTERS);
+        HDATA_LIST(last_weechat_plugin, 0);
     }
     return hdata;
 }
diff --git a/src/plugins/script/script-repo.c b/src/plugins/script/script-repo.c
index b9f868653..bc7756a16 100644
--- a/src/plugins/script/script-repo.c
+++ b/src/plugins/script/script-repo.c
@@ -1520,8 +1520,8 @@ script_repo_hdata_script_cb (void *data, const char *hdata_name)
         WEECHAT_HDATA_VAR(struct t_script_repo, install_order, INTEGER, 0, NULL, NULL);
         WEECHAT_HDATA_VAR(struct t_script_repo, prev_script, POINTER, 0, NULL, hdata_name);
         WEECHAT_HDATA_VAR(struct t_script_repo, next_script, POINTER, 0, NULL, hdata_name);
-        WEECHAT_HDATA_LIST(scripts_repo);
-        WEECHAT_HDATA_LIST(last_script_repo);
+        WEECHAT_HDATA_LIST(scripts_repo, WEECHAT_HDATA_LIST_CHECK_POINTERS);
+        WEECHAT_HDATA_LIST(last_script_repo, 0);
     }
     return hdata;
 }
diff --git a/src/plugins/weechat-plugin.h b/src/plugins/weechat-plugin.h
index c17d28991..7e491dda2 100644
--- a/src/plugins/weechat-plugin.h
+++ b/src/plugins/weechat-plugin.h
@@ -57,7 +57,7 @@ struct timeval;
  * please change the date with current one; for a second change at same
  * date, increment the 01, otherwise please keep 01.
  */
-#define WEECHAT_PLUGIN_API_VERSION "20140313-01"
+#define WEECHAT_PLUGIN_API_VERSION "20140524-01"
 
 /* macros for defining plugin infos */
 #define WEECHAT_PLUGIN_NAME(__name)                                     \
@@ -125,6 +125,9 @@ struct timeval;
 #define WEECHAT_HDATA_HASHTABLE                     7
 #define WEECHAT_HDATA_SHARED_STRING                 8
 
+/* flags for hdata lists */
+#define WEECHAT_HDATA_LIST_CHECK_POINTERS           1
+
 /* buffer hotlist */
 #define WEECHAT_HOTLIST_LOW                         "0"
 #define WEECHAT_HOTLIST_MESSAGE                     "1"
@@ -879,7 +882,7 @@ struct t_weechat_plugin
                            int type, int update_allowed, const char *array_size,
                            const char *hdata_name);
     void (*hdata_new_list) (struct t_hdata *hdata, const char *name,
-                            void *pointer);
+                            void *pointer, int flags);
     struct t_hdata *(*hdata_get) (struct t_weechat_plugin *plugin,
                                   const char *hdata_name);
     int (*hdata_get_var_offset) (struct t_hdata *hdata, const char *name);
@@ -1685,10 +1688,10 @@ extern int weechat_plugin_end (struct t_weechat_plugin *plugin);
     weechat_hdata_new_var (hdata, #__name, offsetof (__struct, __name), \
                            WEECHAT_HDATA_##__type, __update_allowed,    \
                            __array_size, __hdata_name)
-#define weechat_hdata_new_list(__hdata, __name, __pointer)              \
-    weechat_plugin->hdata_new_list(__hdata, __name, __pointer)
-#define WEECHAT_HDATA_LIST(__name)                                      \
-    weechat_hdata_new_list (hdata, #__name, &(__name));
+#define weechat_hdata_new_list(__hdata, __name, __pointer, __flags)     \
+    weechat_plugin->hdata_new_list(__hdata, __name, __pointer, __flags)
+#define WEECHAT_HDATA_LIST(__name, __flags)                             \
+    weechat_hdata_new_list (hdata, #__name, &(__name), __flags);
 #define weechat_hdata_get(__hdata_name)                                 \
     weechat_plugin->hdata_get(weechat_plugin, __hdata_name)
 #define weechat_hdata_get_var_offset(__hdata, __name)                   \