usr/src/cmd/sgs/libelf/common/hash.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1988 AT&T */
  28 /*        All Rights Reserved   */
  29
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 /*
  33  * The elf_hash() routine as defined by the gABI
  34  */
  35 unsigned long
  36 elf_hash(const char *ename)
  37 {
  38         unsigned int    hval = 0;
  39
  40         while (*ename) {
  41                 unsigned int    g;
  42                 hval = (hval << 4) + *ename++;
  43                 if ((g = (hval & 0xf0000000)) != 0)
  44                         hval ^= g >> 24;
  45                 hval &= ~g;
  46         }
  47         return ((unsigned long)hval);
  48 }