/*	$OpenBSD: search.h,v 1.5 2002/02/17 19:42:21 millert Exp $	*/
/*	$NetBSD: search.h,v 1.9 1995/08/08 21:14:45 jtc Exp $	*/

/*
 * Written by J.T. Conklin <jtc@netbsd.org>
 * Public domain.
 */

#ifndef _SEARCH_H_
#define _SEARCH_H_
#include <sys/cdefs.h>
#include <machine/ansi.h>

#ifdef	_BSD_SIZE_T_
typedef	_BSD_SIZE_T_	size_t;
#undef	_BSD_SIZE_T_
#endif

typedef struct entry {
	char *key;
	char *data;
} ENTRY;

typedef enum {
	FIND, ENTER
} ACTION;

typedef enum {
	preorder,
	postorder,
	endorder,
	leaf
} VISIT;

__BEGIN_DECLS
extern void	*bsearch(const void *, const void *, size_t, size_t,
		    int (*)(const void *, const void *));
extern int	 hcreate(unsigned int);
extern void	 hdestroy(void);
extern ENTRY	*hsearch(ENTRY, ACTION);

extern void	*lfind(const void *, const void *, size_t *, size_t,
		    int (*)(const void *, const void *));
extern void	*lsearch(const void *, const void *, size_t *, size_t,
		    int (*)(const void *, const void *));
extern void	 insque(void *, void *);
extern void	 remque(void *);

extern void	*tdelete(const void *, void **,
		    int (*)(const void *, const void *));
extern void	*tfind(const void *, void * const *,
		    int (*)(const void *, const void *));
extern void	*tsearch(const void *, void **, 
		    int (*)(const void *, const void *));
extern void      twalk(const void *, void (*)(const void *, VISIT, int));
__END_DECLS

#endif