[keyboard] add g_strv_behead, reduce code & fix filter_xkb_config()

Fixes compiler warning: 'i' may be used uninitialized in this function

Indeed, rather than initializing 'i' to zero, 'lv' (char arr of **lv) was
erroneously being assigned the value of 0 in the for loop's initialization.

g_strv_behead copied from gkbd_strv_behead from libgnomekbd/gkbd-util.c

For reference: Using shared gkbd_strv_* utility functions, reducing the code
http://git.gnome.org/browse/gnome-settings-daemon/commit/?id=f62d0846143b8a65606daa6860e6b2cd7f9cb465

1 files changed, 21 insertions, 32 deletions

diff --git a/plugins/keyboard/msd-keyboard-xkb.c b/plugins/keyboard/msd-keyboard-xkb.c
index 0254f68..b9b5c24 100644
--- a/plugins/keyboard/msd-keyboard-xkb.c
+++ b/plugins/keyboard/msd-keyboard-xkb.c
@@ -103,22 +103,14 @@ static void msd_keyboard_log_appender(const char file[], const char function[],
 }
 #endif
 
-static void g_strv_delete_str (gchar **a, gchar *str)
+static void
+g_strv_behead (gchar **arr)
 {
-	int i;
-	int j;
-	gchar **b;
-	b = g_new0 (gchar *, g_strv_length (a) - 1);
-
-	j = 0;
-	for (i = 0; a[i] != NULL; i++) {
-		if (g_strcmp0 (a[i], str) != 0) {
-			b[j] = g_strdup (a[i]);
-			j++;
-		}
-	}
-	g_strfreev (a);
-	a = b;
+	if (arr == NULL || *arr == NULL)
+		return;
+
+	g_free (*arr);
+	memmove (arr, arr + 1, g_strv_length (arr) * sizeof (gchar *));
 }
 
 static void
@@ -398,7 +390,6 @@ filter_xkb_config (void)
 	gchar *lname;
 	gchar *vname;
 	gchar **lv;
-	int i;
 	gboolean any_change = FALSE;
 
 	xkl_debug (100, "Filtering configuration against the registry\n");
@@ -412,24 +403,20 @@ filter_xkb_config (void)
 			return FALSE;
 		}
 	}
-	lv = g_strdupv(current_kbd_config.layouts_variants);
+	lv = current_kbd_config.layouts_variants;
 	item = xkl_config_item_new ();
-	for (lv = 0; lv[i] != NULL; i++) {
-		xkl_debug (100, "Checking [%s]\n", lv[i]);
-		if (matekbd_keyboard_config_split_items
-		    (lv[i], &lname, &vname)) {
+	while (*lv) {
+		xkl_debug (100, "Checking [%s]\n", *lv);
+		if (matekbd_keyboard_config_split_items (*lv, &lname, &vname)) {
+			gboolean should_be_dropped = FALSE;
 			g_snprintf (item->name, sizeof (item->name), "%s",
 				    lname);
 			if (!xkl_config_registry_find_layout
 			    (xkl_registry, item)) {
 				xkl_debug (100, "Bad layout [%s]\n",
 					   lname);
-				g_strv_delete_str (current_kbd_config.layouts_variants,
-							lv[i]);
-				any_change = TRUE;
-				continue;
-			}
-			if (vname) {
+				should_be_dropped = TRUE;
+			} else if (vname) {
 				g_snprintf (item->name,
 					    sizeof (item->name), "%s",
 					    vname);
@@ -438,14 +425,16 @@ filter_xkb_config (void)
 					xkl_debug (100,
 						   "Bad variant [%s(%s)]\n",
 						   lname, vname);
-					g_strv_delete_str
-					    (current_kbd_config.layouts_variants,
-					     lv[i]);
-					any_change = TRUE;
-					continue;
+					should_be_dropped = TRUE;
 				}
 			}
+			if (should_be_dropped) {
+				g_strv_behead (lv);
+				any_change = TRUE;
+				continue;
+			}
 		}
+		lv++;
 	}
 	g_object_unref (item);
 	return any_change;