add jsw data structure code

[zpackage] / lib / jsw / jsw_atree.h

diff --git a/lib/jsw/jsw_atree.h b/lib/jsw/jsw_atree.h
new file mode 100644 (file)
index 0000000..0faf528
--- /dev/null
+++ b/lib/jsw/jsw_atree.h
@@ -0,0 +1,59 @@
+#ifndef JSW_ATREE_H
+#define JSW_ATREE_H
+
+/*
+  Andersson tree library
+
+    > Created (Julienne Walker): September 10, 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_atree jsw_atree_t;
+typedef struct jsw_atrav jsw_atrav_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 );
+
+/* Andersson tree functions */
+jsw_atree_t *jsw_anew ( cmp_f cmp, dup_f dup, rel_f rel );
+void         jsw_adelete ( jsw_atree_t *tree );
+void        *jsw_afind ( jsw_atree_t *tree, void *data );
+int          jsw_ainsert ( jsw_atree_t *tree, void *data );
+int          jsw_aerase ( jsw_atree_t *tree, void *data );
+size_t       jsw_asize ( jsw_atree_t *tree );
+
+/* Traversal functions */
+jsw_atrav_t *jsw_atnew ( void );
+void         jsw_atdelete ( jsw_atrav_t *trav );
+void        *jsw_atfirst ( jsw_atrav_t *trav, jsw_atree_t *tree );
+void        *jsw_atlast ( jsw_atrav_t *trav, jsw_atree_t *tree );
+void        *jsw_atnext ( jsw_atrav_t *trav );
+void        *jsw_atprev ( jsw_atrav_t *trav );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif