xref: /freebsd/include/search.h (revision 840b798c83238d9477451fc3f3af180ca6249e59)
1 /*	$NetBSD: search.h,v 1.12 1999/02/22 10:34:28 christos Exp $	*/
2 /* $FreeBSD$ */
3 
4 /*
5  * Written by J.T. Conklin <jtc@netbsd.org>
6  * Public domain.
7  */
8 
9 #ifndef _SEARCH_H_
10 #define _SEARCH_H_
11 
12 #include <sys/cdefs.h>
13 #include <machine/ansi.h>
14 
15 #ifdef	_BSD_SIZE_T_
16 typedef	_BSD_SIZE_T_	size_t;
17 #undef	_BSD_SIZE_T_
18 #endif
19 
20 typedef struct entry {
21 	char *key;
22 	void *data;
23 } ENTRY;
24 
25 typedef enum {
26 	FIND, ENTER
27 } ACTION;
28 
29 typedef enum {
30 	preorder,
31 	postorder,
32 	endorder,
33 	leaf
34 } VISIT;
35 
36 #ifdef _SEARCH_PRIVATE
37 typedef struct node {
38 	char         *key;
39 	struct node  *llink, *rlink;
40 } node_t;
41 #endif
42 
43 __BEGIN_DECLS
44 int	 hcreate(size_t);
45 void	 hdestroy(void);
46 ENTRY	*hsearch(ENTRY, ACTION);
47 void	*tdelete(const void *__restrict, void **__restrict,
48 	    int (*)(const void *, const void *));
49 void	*tfind(const void *, void **, int (*)(const void *, const void *));
50 void	*tsearch(const void *, void **, int (*)(const void *, const void *));
51 void      twalk(const void *, void (*)(const void *, VISIT, int));
52 __END_DECLS
53 
54 #endif /* !_SEARCH_H_ */
55