/*      $NetBSD: search.h,v 1.22 2014/07/20 20:17:21 christos Exp $     */

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

#ifndef _SEARCH_H_
#define _SEARCH_H_

#include <sys/cdefs.h>
#include <sys/featuretest.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;
        void *data;
} ENTRY;

#ifdef _NETBSD_SOURCE
struct _ENTRY;
struct hsearch_data {
        struct _ENTRY *table;
        size_t size;
        size_t filled;
};
#endif

typedef enum {
        FIND, ENTER
} ACTION;

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

#ifdef _SEARCH_PRIVATE
typedef struct node {
        char         *key;
        struct node  *llink, *rlink;
} node_t;
#endif

__BEGIN_DECLS
#ifndef __BSEARCH_DECLARED
#define __BSEARCH_DECLARED
/* also in stdlib.h */
void    *bsearch(const void *, const void *, size_t, size_t,
                      int (*)(const void *, const void *));
#endif /* __BSEARCH_DECLARED */

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

#ifdef _NETBSD_SOURCE
void     hdestroy1(void (*)(void *), void (*)(void *));
int      hcreate_r(size_t, struct hsearch_data *);
void     hdestroy_r(struct hsearch_data *);
void     hdestroy1_r(struct hsearch_data *, void (*)(void *), void (*)(void *));
int      hsearch_r(ENTRY, ACTION, ENTRY **, struct hsearch_data *);
#endif /* _NETBSD_SOURCE */

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_ */