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37be9888 AJ |
1 | /* |
2 | * Copyright (C) 1996-2014 The Squid Software Foundation and contributors | |
3 | * | |
4 | * Squid software is distributed under GPLv2+ license and includes | |
5 | * contributions from numerous individuals and organizations. | |
6 | * Please see the COPYING and CONTRIBUTORS files for details. | |
7 | */ | |
8 | ||
605f2c3e AJ |
9 | #ifndef SQUID_COMPAT_STRNSTR_CC_ |
10 | #define SQUID_COMPAT_STRNSTR_CC_ | |
41d00cd3 | 11 | |
cee08cbc AJ |
12 | /* |
13 | * Shamelessly duplicated from the FreeBSD public sources | |
14 | * for use by the Squid Project under GNU Public License. | |
15 | * | |
16 | * Update/Maintenance History: | |
17 | * | |
18 | * 26-Apr-2008 : Copied from FreeBSD via OpenGrok | |
19 | * - added protection around libray headers | |
20 | * - added squid_ prefix for uniqueness | |
21 | * so we can use it where OS copy is broken. | |
22 | * | |
cee08cbc AJ |
23 | * Original License and code follows. |
24 | */ | |
25 | ||
f7f3304a | 26 | #include "squid.h" |
cee08cbc AJ |
27 | |
28 | #if !HAVE_STRNSTR | |
29 | ||
30 | /*- | |
31 | * Copyright (c) 2001 Mike Barcroft <mike@FreeBSD.org> | |
32 | * Copyright (c) 1990, 1993 | |
33 | * The Regents of the University of California. All rights reserved. | |
34 | * | |
35 | * This code is derived from software contributed to Berkeley by | |
36 | * Chris Torek. | |
37 | * | |
38 | * Redistribution and use in source and binary forms, with or without | |
39 | * modification, are permitted provided that the following conditions | |
40 | * are met: | |
41 | * 1. Redistributions of source code must retain the above copyright | |
42 | * notice, this list of conditions and the following disclaimer. | |
43 | * 2. Redistributions in binary form must reproduce the above copyright | |
44 | * notice, this list of conditions and the following disclaimer in the | |
45 | * documentation and/or other materials provided with the distribution. | |
5bb10e0a | 46 | * 3. Neither the name of the University nor the names of its contributors |
cee08cbc AJ |
47 | * may be used to endorse or promote products derived from this software |
48 | * without specific prior written permission. | |
49 | * | |
50 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
51 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
52 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
53 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
54 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
55 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
56 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
57 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
58 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
59 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
60 | * SUCH DAMAGE. | |
61 | * | |
62 | * @(#)strstr.c 8.1 (Berkeley) 6/4/93 | |
63 | * $FreeBSD: src/lib/libc/string/strnstr.c,v 1.2.2.1 2001/12/09 06:50:03 mike Exp $ | |
64 | * $DragonFly: src/lib/libc/string/strnstr.c,v 1.4 2006/03/20 17:24:20 dillon Exp $ | |
65 | */ | |
66 | ||
67 | #if HAVE_SYS_TYPES_H | |
68 | #include <sys/types.h> | |
69 | #endif | |
074d6a40 | 70 | #include <cstring> |
cee08cbc | 71 | |
41d00cd3 | 72 | /** |
cee08cbc AJ |
73 | * Find the first occurrence of find in s, where the search is limited to the |
74 | * first slen characters of s. | |
75 | */ | |
76 | const char * | |
77 | squid_strnstr(const char *s, const char *find, size_t slen) | |
78 | { | |
26ac0430 AJ |
79 | char c, sc; |
80 | size_t len; | |
cee08cbc | 81 | |
26ac0430 AJ |
82 | if ((c = *find++) != '\0') { |
83 | len = strlen(find); | |
84 | do { | |
85 | do { | |
86 | if (slen < 1 || (sc = *s) == '\0') | |
87 | return (NULL); | |
88 | --slen; | |
89 | ++s; | |
90 | } while (sc != c); | |
91 | if (len > slen) | |
92 | return (NULL); | |
93 | } while (strncmp(s, find, len) != 0); | |
755494da | 94 | --s; |
26ac0430 AJ |
95 | } |
96 | return s; | |
cee08cbc AJ |
97 | } |
98 | ||
99 | #endif /* !HAVE_STRNSTR */ | |
605f2c3e | 100 | #endif /* SQUID_COMPAT_STRNSTR_CC_ */ |