1*f8fb3368SJohn Marino /*-
2*f8fb3368SJohn Marino * Copyright (c) 2006,2008 Joseph Koshy
3*f8fb3368SJohn Marino * All rights reserved.
4*f8fb3368SJohn Marino *
5*f8fb3368SJohn Marino * Redistribution and use in source and binary forms, with or without
6*f8fb3368SJohn Marino * modification, are permitted provided that the following conditions
7*f8fb3368SJohn Marino * are met:
8*f8fb3368SJohn Marino * 1. Redistributions of source code must retain the above copyright
9*f8fb3368SJohn Marino * notice, this list of conditions and the following disclaimer.
10*f8fb3368SJohn Marino * 2. Redistributions in binary form must reproduce the above copyright
11*f8fb3368SJohn Marino * notice, this list of conditions and the following disclaimer in the
12*f8fb3368SJohn Marino * documentation and/or other materials provided with the distribution.
13*f8fb3368SJohn Marino *
14*f8fb3368SJohn Marino * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15*f8fb3368SJohn Marino * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16*f8fb3368SJohn Marino * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17*f8fb3368SJohn Marino * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18*f8fb3368SJohn Marino * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19*f8fb3368SJohn Marino * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20*f8fb3368SJohn Marino * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21*f8fb3368SJohn Marino * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22*f8fb3368SJohn Marino * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23*f8fb3368SJohn Marino * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24*f8fb3368SJohn Marino * SUCH DAMAGE.
25*f8fb3368SJohn Marino */
26*f8fb3368SJohn Marino
27*f8fb3368SJohn Marino #include <libelf.h>
28*f8fb3368SJohn Marino
29*f8fb3368SJohn Marino #include "_libelf.h"
30*f8fb3368SJohn Marino
31*f8fb3368SJohn Marino ELFTC_VCSID("$Id: elf_hash.c 3174 2015-03-27 17:13:41Z emaste $");
32*f8fb3368SJohn Marino
33*f8fb3368SJohn Marino /*
34*f8fb3368SJohn Marino * This elf_hash function is defined by the System V ABI.
35*f8fb3368SJohn Marino */
36*f8fb3368SJohn Marino
37*f8fb3368SJohn Marino unsigned long
elf_hash(const char * name)38*f8fb3368SJohn Marino elf_hash(const char *name)
39*f8fb3368SJohn Marino {
40*f8fb3368SJohn Marino unsigned long h, t;
41*f8fb3368SJohn Marino const unsigned char *s;
42*f8fb3368SJohn Marino
43*f8fb3368SJohn Marino s = (const unsigned char *) name;
44*f8fb3368SJohn Marino h = t = 0;
45*f8fb3368SJohn Marino
46*f8fb3368SJohn Marino for (; *s != '\0'; h = h & ~t) {
47*f8fb3368SJohn Marino h = (h << 4) + *s++;
48*f8fb3368SJohn Marino t = h & 0xF0000000UL;
49*f8fb3368SJohn Marino if (t)
50*f8fb3368SJohn Marino h ^= t >> 24;
51*f8fb3368SJohn Marino }
52*f8fb3368SJohn Marino
53*f8fb3368SJohn Marino return (h);
54*f8fb3368SJohn Marino }
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