/* * Copyright (C) 1996-2018 The Squid Software Foundation and contributors * * Squid software is distributed under GPLv2+ license and includes * contributions from numerous individuals and organizations. * Please see the COPYING and CONTRIBUTORS files for details. */ #ifndef SQUID_COMPAT_STRNSTR_CC_ #define SQUID_COMPAT_STRNSTR_CC_ /* * Shamelessly duplicated from the FreeBSD public sources * for use by the Squid Project under GNU Public License. * * Update/Maintenance History: * * 26-Apr-2008 : Copied from FreeBSD via OpenGrok * - added protection around libray headers * - added squid_ prefix for uniqueness * so we can use it where OS copy is broken. * * Original License and code follows. */ #include "squid.h" #if !HAVE_STRNSTR /*- * Copyright (c) 2001 Mike Barcroft * Copyright (c) 1990, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Chris Torek. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)strstr.c 8.1 (Berkeley) 6/4/93 * $FreeBSD: src/lib/libc/string/strnstr.c,v 1.2.2.1 2001/12/09 06:50:03 mike Exp $ * $DragonFly: src/lib/libc/string/strnstr.c,v 1.4 2006/03/20 17:24:20 dillon Exp $ */ #if HAVE_SYS_TYPES_H #include #endif #include /** * Find the first occurrence of find in s, where the search is limited to the * first slen characters of s. */ const char * squid_strnstr(const char *s, const char *find, size_t slen) { char c, sc; size_t len; if ((c = *find++) != '\0') { len = strlen(find); do { do { if (slen < 1 || (sc = *s) == '\0') return (NULL); --slen; ++s; } while (sc != c); if (len > slen) return (NULL); } while (strncmp(s, find, len) != 0); --s; } return s; } #endif /* !HAVE_STRNSTR */ #endif /* SQUID_COMPAT_STRNSTR_CC_ */