strnstr.cc
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1 /*
2  * Copyright (C) 1996-2019 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 
9 #ifndef SQUID_COMPAT_STRNSTR_CC_
10 #define SQUID_COMPAT_STRNSTR_CC_
11 
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  *
23  * Original License and code follows.
24  */
25 
26 #include "squid.h"
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.
46  * 3. Neither the name of the University nor the names of its contributors
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
70 #include <cstring>
71 
76 const char *
77 squid_strnstr(const char *s, const char *find, size_t slen)
78 {
79  char c, sc;
80  size_t len;
81 
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);
94  --s;
95  }
96  return s;
97 }
98 
99 #endif /* !HAVE_STRNSTR */
100 #endif /* SQUID_COMPAT_STRNSTR_CC_ */
101 
const char * squid_strnstr(const char *s, const char *find, size_t slen)
Definition: strnstr.cc:77
static int sc[16]
Definition: smbdes.c:121
int unsigned int const char *desc STUB void int len
Definition: stub_fd.cc:20
#define NULL
Definition: types.h:166

 

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