add jsw data structure code

[zpackage] / lib / jsw / jsw_avltree.h

diff --git a/lib/jsw/jsw_avltree.h b/lib/jsw/jsw_avltree.h
new file mode 100644 (file)
index 0000000..aaaf76e
--- /dev/null
+++ b/lib/jsw/jsw_avltree.h
@@ -0,0 +1,60 @@
+#ifndef JSW_AVLTREE_H
+#define JSW_AVLTREE_H
+
+/*
+  AVL balanced tree library
+
+    > Created (Julienne Walker): June 17, 2003
+    > Modified (Julienne Walker): September 24, 2005
+
+  This code is in the public domain. Anyone may
+  use it or change it in any way that they see
+  fit. The author assumes no responsibility for 
+  damages incurred through use of the original
+  code or any variations thereof.
+
+  It is requested, but not required, that due
+  credit is given to the original author and
+  anyone who has modified the code through
+  a header comment, such as this one.
+*/
+#ifdef __cplusplus
+#include <cstddef>
+
+using std::size_t;
+
+extern "C" {
+#else
+#include <stddef.h>
+#endif
+
+/* Opaque types */
+typedef struct jsw_avltree jsw_avltree_t;
+typedef struct jsw_avltrav jsw_avltrav_t;
+
+/* User-defined item handling */
+typedef int   (*cmp_f) ( const void *p1, const void *p2 );
+typedef void *(*dup_f) ( void *p );
+typedef void  (*rel_f) ( void *p );
+
+/* AVL tree functions */
+jsw_avltree_t *jsw_avlnew ( cmp_f cmp, dup_f dup, rel_f rel );
+void           jsw_avldelete ( jsw_avltree_t *tree );
+void          *jsw_avlfind ( jsw_avltree_t *tree, void *data );
+int            jsw_avlinsert ( jsw_avltree_t *tree, void *data );
+int            jsw_avlerase ( jsw_avltree_t *tree, void *data );
+size_t         jsw_avlsize ( jsw_avltree_t *tree );
+
+/* Traversal functions */
+jsw_avltrav_t *jsw_avltnew ( void );
+void           jsw_avltdelete ( jsw_avltrav_t *trav );
+void          *jsw_avltfirst ( jsw_avltrav_t *trav, jsw_avltree_t *tree );
+void          *jsw_avltlast ( jsw_avltrav_t *trav, jsw_avltree_t *tree );
+void          *jsw_avltnext ( jsw_avltrav_t *trav );
+void          *jsw_avltprev ( jsw_avltrav_t *trav );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif