text: /*	$NetBSD: citrus_db_hash.c,v 1.5 2008/02/09 14:56:20 junyoung Exp $
   */
  
  /*-
   * Copyright (c)2003 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.
   */
  
  #if HAVE_NBTOOL_CONFIG_H
  #include "nbtool_config.h"
  #endif
  
  #include <sys/cdefs.h>
  #if defined(LIBC_SCCS) && !defined(lint)
  __RCSID("$NetBSD: citrus_db_hash.c,v 1.5 2008/02/09 14:56:20 junyoung Exp $");
  #endif /* LIBC_SCCS and not lint */
  
  #include <assert.h>
  #include <stdio.h>
  #include <string.h>
  #include <sys/types.h>
  
  #include "citrus_namespace.h"
  #include "citrus_types.h"
  #include "citrus_bcs.h"
  #include "citrus_region.h"
  #include "citrus_db_hash.h"
  
  uint32_t
  /*ARGSUSED*/
  _citrus_db_hash_std(void *closure, struct _region *r) {
    const uint8_t *p = _region_head(r);
    uint32_t hash = 0, tmp;
    size_t i;
  
    for (i = _region_size(r); i > 0; i--) {
      hash <<= 4;
      hash += _bcs_tolower(*p);
      tmp = hash & 0xF0000000;
      if (tmp != 0) {
        hash ^= tmp;
        hash ^= tmp >> 24;
      }
      p++;
    }
    return hash;
  }
  