Radix cross Linux package tools

diff --git a/src/dlist.h b/src/dlist.h
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--- /dev/null
+++ b/src/dlist.h
@@ -0,0 +1,83 @@
+
+/**********************************************************************
+
+  Copyright 2019 Andrey V.Kosteltsev
+
+  Licensed under the Radix.pro License, Version 1.0 (the "License");
+  you may not use this file  except  in compliance with the License.
+  You may obtain a copy of the License at
+
+     https://radix.pro/licenses/LICENSE-1.0-en_US.txt
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+  implied.
+
+ **********************************************************************/
+
+#ifndef _DLIST_H_
+#define _DLIST_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+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_ */