]> git.saurik.com Git - bison.git/blob - lib/strnlen.c
* src/output.c (output_rule_data): Fix various range errors:
[bison.git] / lib / strnlen.c
1 /* Find the length of STRING, but scan at most MAXLEN characters.
2 Copyright (C) 1996, 1997, 1998, 2000, 2001 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
14
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
19
20 #if HAVE_CONFIG_H
21 # include <config.h>
22 #endif
23
24 #if HAVE_STRING_H
25 # if !STDC_HEADERS && HAVE_MEMORY_H
26 # include <memory.h>
27 # endif
28 # include <string.h>
29 #else
30 # include <strings.h>
31 #endif
32
33 #ifndef HAVE_DECL_MEMCHR
34 "this configure-time declaration test was not run"
35 #endif
36 #if !HAVE_DECL_MEMCHR
37 char *memchr ();
38 #endif
39
40 #undef __strnlen
41 #undef strnlen
42
43 #ifndef weak_alias
44 # define __strnlen strnlen
45 #endif
46
47 /* Find the length of STRING, but scan at most MAXLEN characters.
48 If no '\0' terminator is found in that many characters, return MAXLEN. */
49
50 size_t
51 __strnlen (const char *string, size_t maxlen)
52 {
53 const char *end = memchr (string, '\0', maxlen);
54 return end ? (size_t) (end - string) : maxlen;
55 }
56 #ifdef weak_alias
57 weak_alias (__strnlen, strnlen)
58 #endif