--- a/th_util.h	Sat Oct 30 21:08:21 2010 +0300
+++ b/th_util.h	Tue Nov 02 21:31:11 2010 +0200
@@ -1,7 +1,7 @@
 /*
  * Generic utility-functions, macros and defaults
  * Programmed and designed by Matti 'ccr' Hamalainen
- * (C) Copyright 2002-2009 Tecnic Software productions (TNSP)
+ * (C) Copyright 2002-2010 Tecnic Software productions (TNSP)
  *
  * Please read file 'COPYING' for information on license and distribution.
  */
@@ -83,6 +83,33 @@
 void    *th_memset(void *, int, size_t);
 #endif
 
+
+/* Doubly linked list handling
+ */
+typedef struct _qlist_t {
+    void *data;
+    size_t num;
+    struct _qlist_t *prev, *next;
+} qlist_t;
+
+
+qlist_t * th_llist_new(void *data);
+void      th_llist_free(qlist_t *list);
+void      th_llist_free_func(qlist_t *list, void (*freefunc)(void *data));
+
+qlist_t * th_llist_append(qlist_t **list, void *data);
+qlist_t * th_llist_prepend(qlist_t **list, void *data);
+void      th_llist_delete(qlist_t **list, const void *data);
+void      th_llist_delete_node(qlist_t **list, qlist_t *node);
+
+qlist_t * th_llist_get_nth(qlist_t *list, const size_t n);
+size_t    th_llist_length(const qlist_t *list);
+ssize_t   th_llist_position(const qlist_t *list, const qlist_t *node);
+
+qlist_t * th_llist_find(qlist_t *list, const void *data);
+qlist_t * th_llist_find_func(qlist_t *list, const void *userdata, int (compare)(const void *, const void *));
+
+
 #ifdef __cplusplus
 }
 #endif