/*      $OpenBSD: search.h,v 1.10 2014/07/18 04:16:09 matthew 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/_types.h>

#ifndef _SIZE_T_DEFINED_
#define _SIZE_T_DEFINED_
typedef __size_t        size_t;
#endif

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

typedef enum {
        FIND, ENTER
} ACTION;

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

__BEGIN_DECLS
int      hcreate(size_t);
void     hdestroy(void);
ENTRY   *hsearch(ENTRY, ACTION);

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

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

#endif /* !_SEARCH_H_ */