glib-compat: add g_hash_table_get_keys_as_array() compat function

include/nm-glib.h

@@ -303,4 +303,43 @@ _g_key_file_save_to_file (GKeyFile     *key_file,
 #endif
 
 
+#if !GLIB_CHECK_VERSION(2, 40, 0) || defined (NM_GLIB_COMPAT_H_TEST)
+static inline gpointer *
+_nm_g_hash_table_get_keys_as_array (GHashTable *hash_table,
+                                    guint      *length)
+{
+	GHashTableIter iter;
+	gpointer key, *ret;
+	guint i = 0;
+
+	g_return_val_if_fail (hash_table, NULL);
+
+	ret = g_new0 (gpointer, g_hash_table_size (hash_table) + 1);
+	g_hash_table_iter_init (&iter, hash_table);
+
+	while (g_hash_table_iter_next (&iter, &key, NULL))
+		ret[i++] = key;
+
+	ret[i] = NULL;
+
+	if (length)
+		*length = i;
+
+	return ret;
+}
+#endif
+#if !GLIB_CHECK_VERSION(2, 40, 0)
+#define g_hash_table_get_keys_as_array(hash_table, length) \
+	G_GNUC_EXTENSION ({ \
+		_nm_g_hash_table_get_keys_as_array (hash_table, length); \
+	})
+#else
+#define g_hash_table_get_keys_as_array(hash_table, length) \
+	G_GNUC_EXTENSION ({ \
+		G_GNUC_BEGIN_IGNORE_DEPRECATIONS \
+			(g_hash_table_get_keys_as_array) ((hash_table), (length)); \
+		G_GNUC_END_IGNORE_DEPRECATIONS \
+	})
+#endif
+
 #endif  /* __NM_GLIB_H__ */

libnm-core/tests/test-general.c

@@ -4534,6 +4534,41 @@ test_g_ptr_array_insert (void)
 
 /******************************************************************************/
 
+static void
+test_g_hash_table_get_keys_as_array (void)
+{
+	GHashTable *table = g_hash_table_new (g_str_hash, g_str_equal);
+	guint length;
+	char **keys;
+
+	g_hash_table_insert (table, "one",   "1");
+	g_hash_table_insert (table, "two",   "2");
+	g_hash_table_insert (table, "three", "3");
+
+	keys = (char **) _nm_g_hash_table_get_keys_as_array (table, &length);
+	g_assert (keys);
+	g_assert_cmpuint (length, ==, 3);
+
+	g_assert (   !strcmp (keys[0], "one")
+	          || !strcmp (keys[1], "one")
+	          || !strcmp (keys[2], "one"));
+
+	g_assert (   !strcmp (keys[0], "two")
+	          || !strcmp (keys[1], "two")
+	          || !strcmp (keys[2], "two"));
+
+	g_assert (   !strcmp (keys[0], "three")
+	          || !strcmp (keys[1], "three")
+	          || !strcmp (keys[2], "three"));
+
+	g_assert (!keys[3]);
+
+	g_free (keys);
+	g_hash_table_unref (table);
+}
+
+/******************************************************************************/
+
 static int
 _test_find_binary_search_cmp (gconstpointer a, gconstpointer b, gpointer dummy)
 {
@@ -4903,6 +4938,7 @@ int main (int argc, char **argv)
 	g_test_add_func ("/core/general/_nm_utils_ascii_str_to_int64", test_nm_utils_ascii_str_to_int64);
 	g_test_add_func ("/core/general/nm_utils_is_power_of_two", test_nm_utils_is_power_of_two);
 	g_test_add_func ("/core/general/_glib_compat_g_ptr_array_insert", test_g_ptr_array_insert);
+	g_test_add_func ("/core/general/_glib_compat_g_hash_table_get_keys_as_array", test_g_hash_table_get_keys_as_array);
 	g_test_add_func ("/core/general/_nm_utils_ptrarray_find_binary_search", test_nm_utils_ptrarray_find_binary_search);
 	g_test_add_func ("/core/general/_nm_utils_strstrdictkey", test_nm_utils_strstrdictkey);