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diff --git a/csvncgi/dlist.h b/csvncgi/dlist.h
new file mode 100644
index 0000000..37f9e3f
--- /dev/null
+++ b/csvncgi/dlist.h
@@ -0,0 +1,71 @@
+
+#ifndef __DLIST_H_
+#define __DLIST_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+typedef void (*dlist_errfunc)( const char *fmt, ... );
+
+extern void dlist_error( const char *fmt, ... ) __attribute__((format (printf,1,2)));
+extern dlist_errfunc dlist_fatal; /* Default Fatal Error Function == dlist_error() */
+
+struct dlist {
+  struct dlist *prev;
+  struct dlist *next;
+
+  void  *data;
+};
+
+typedef void (*DLFUNC)  ( void *data, void *user_data );
+typedef int  (*DLCMPF)  ( const void *a, const void *b );
+typedef int  (*DLCMPDF) ( const void *a, const void *b, void *user_data );
+
+#define dlist_prev( list )  ( (list)->prev )
+#define dlist_next( list )  ( (list)->next )
+
+extern struct dlist *__dlist_alloc( void );
+extern struct dlist *dlist_first( struct dlist *list );
+extern struct dlist *dlist_last( struct dlist *list );
+extern int dlist_length( struct dlist *list );
+extern struct dlist *dlist_nth( struct dlist *list, int n );
+extern void *dlist_nth_data( struct dlist *list, int n );
+extern int dlist_position( struct dlist *list, struct dlist *link );
+extern int dlist_index( struct dlist *list, const void *data );
+extern struct dlist *dlist_find( struct dlist *list, const void *data );
+extern struct dlist *dlist_find_data( struct dlist *list, DLCMPF func, const void *data );
+
+extern struct dlist *dlist_append( struct dlist *list, void *data );
+extern struct dlist *dlist_prepend( struct dlist *list, void *data );
+extern struct dlist *dlist_insert( struct dlist *list, void *data, int position );
+extern struct dlist *dlist_insert_sorted( struct dlist *list, DLCMPF cmp_func, void *data );
+extern struct dlist *dlist_insert_sorted_with_data( struct dlist *list, DLCMPDF cmp_func, void *data, void *user_data );
+extern struct dlist *dlist_concat( struct dlist *list1, struct dlist *list2 );
+extern struct dlist *dlist_insert_list( struct dlist *list1, struct dlist *list2, int position );
+
+extern struct dlist *__dlist_remove_link( struct dlist *list, struct dlist *link );
+extern struct dlist *dlist_remove( struct dlist *list, const void *data );
+extern struct dlist *dlist_remove_all( struct dlist *list, const void *data );
+extern struct dlist *dlist_remove_data( struct dlist *list, DLCMPF cmp_func, DLFUNC free_func, const void *data );
+extern struct dlist *dlist_remove_data_all( struct dlist *list, DLCMPF cmp_func, DLFUNC free_func, const void *data );
+
+extern struct dlist *dlist_copy( struct dlist *list );
+extern struct dlist *dlist_reverse( struct dlist *list );
+
+extern struct dlist *dlist_sort( struct dlist *list, DLCMPF cmp_func );
+extern struct dlist *dlist_sort_with_data( struct dlist *list, DLCMPDF cmp_func, void *user_data );
+
+extern void dlist_foreach( struct dlist *list, DLFUNC func, void *user_data );
+
+
+extern void __dlist_free( struct dlist *list );
+extern void dlist_free( struct dlist *list, DLFUNC free_func );
+
+
+#ifdef __cplusplus
+}  /* ... extern "C" */
+#endif
+
+#endif /* __DLIST_H_ */