/*      $NetBSD: strhash.c,v 1.3 2007/09/25 08:19:09 junyoung Exp $     */

/*-
* Copyright (c)2003, 2004 Citrus Project,
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: strhash.c,v 1.3 2007/09/25 08:19:09 junyoung Exp $");
#endif /* LIBC_SCCS and not lint */

#include <sys/param.h>
#include <sys/types.h>

#include "libintl_local.h"

/*
* string hash function by P.J.Weinberger.
* this implementation is derived from src/lib/libc/citrus/citrus_db_hash.c.
*/
uint32_t
/*ARGSUSED*/
__intl_string_hash(const char *str)
{
       const uint8_t *p;
       uint32_t hash = 0, tmp;

       for (p = (const uint8_t *)str; *p; p++) {
               hash <<= 4;
               hash += *p;
               tmp = hash & 0xF0000000;
               if (tmp != 0) {
                       hash ^= tmp;
                       hash ^= tmp >> 24;
               }
       }
       return hash;
}