Search engine: fix errors with backward regex-search

edit/editcmd.c

@@ -1122,8 +1122,8 @@ editcmd_find (WEdit *edit, gsize *len)
 
     if (edit->replace_backwards) {
 	search_end = edit->curs1;
-	while (search_start >= 0) {
-	    if (search_end - search_start > edit->search->original_len)
+	while ((int) search_start >= 0) {
+	    if (search_end - search_start > edit->search->original_len && mc_search_is_fixed_search_str(edit->search))
 		search_end = search_start + edit->search->original_len +1;
 	    if ( mc_search_run(edit->search, (void *) edit, search_start, search_end, len))
 	    {

src/search/search.c

@@ -317,3 +317,21 @@ mc_search_prepare_replace_str (mc_search_t * mc_search, GString * replace_str)
 }
 
 /* --------------------------------------------------------------------------------------------- */
+
+gboolean
+mc_search_is_fixed_search_str(mc_search_t * mc_search)
+{
+    if (mc_search == NULL)
+        return FALSE;
+    switch (mc_search->search_type) {
+    case MC_SEARCH_T_REGEX:
+    case MC_SEARCH_T_GLOB:
+	return FALSE;
+        break;
+    default:
+	return TRUE;
+        break;
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */

src/search/search.h

@@ -105,4 +105,6 @@ mc_search_type_str_t *mc_search_types_list_get (void);
 
 GString *mc_search_prepare_replace_str (mc_search_t * mc_search, GString * replace_str);
 
+gboolean mc_search_is_fixed_search_str(mc_search_t *);
+
 #endif