usr/src/lib/libc/db/hash/hsearch.c

/*-
 * Copyright (c) 1990, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Margo Seltzer.
 *
 * %sccs.include.redist.c%
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)hsearch.c   8.1 (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */

#include <sys/types.h>

#include <fcntl.h>
#include <string.h>

#define __DBINTERFACE_PRIVATE
#include <db.h>
#include "search.h"

static DB *dbp = NULL;
static ENTRY retval;

extern int
hcreate(nel)
        u_int nel;
{
        HASHINFO info;

        info.nelem = nel;
        info.bsize = 256;
        info.ffactor = 8;
        info.cachesize = NULL;
        info.hash = NULL;
        info.lorder = 0;
        dbp = (DB *)__hash_open(NULL, O_CREAT | O_RDWR, 0600, &info);
        return ((int)dbp);
}

extern ENTRY *
hsearch(item, action)
        ENTRY item;
        ACTION action;
{
        DBT key, val;
        int status;

        if (!dbp)
                return (NULL);
        key.data = (u_char *)item.key;
        key.size = strlen(item.key) + 1;

        if (action == ENTER) {
                val.data = (u_char *)item.data;
                val.size = strlen(item.data) + 1;
                status = (dbp->put)(dbp, &key, &val, R_NOOVERWRITE);
                if (status)
                        return (NULL);
        } else {
                /* FIND */
                status = (dbp->get)(dbp, &key, &val, 0);
                if (status)
                        return (NULL);
                else
                        item.data = (char *)val.data;
        }
        retval.key = item.key;
        retval.data = item.data;
        return (&retval);
}

extern void
hdestroy()
{
        if (dbp) {
                (void)(dbp->close)(dbp);
                dbp = NULL;
        }
}