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/* $NetBSD: strcasestr.c,v 1.3 2005/11/29 03:12:00 christos Exp $ */ /*- * 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. */ #if defined(LIBC_SCCS) && !defined(lint) __RCSID("$NetBSD: strcasestr.c,v 1.3 2005/11/29 03:12:00 christos Exp $"); __RCSID("$NetBSD: strncasecmp.c,v 1.2 2007/06/04 18:19:27 christos Exp $"); #endif /* LIBC_SCCS and not lint */ #include "php_stdint.h" #include <assert.h> #include <ctype.h> #include <string.h> static int _strncasecmp(const char *s1, const char *s2, size_t n) { if (n != 0) { const unsigned char *us1 = (const unsigned char *)s1, *us2 = (const unsigned char *)s2; do { if (tolower(*us1) != tolower(*us2++)) return tolower(*us1) - tolower(*--us2); if (*us1++ == '\0') break; } while (--n != 0); } return 0; } /* * Find the first occurrence of find in s, ignore case. */ char * strcasestr(const char *s, const char *find) { char c, sc; size_t len; if ((c = *find++) != 0) { c = tolower((unsigned char)c); len = strlen(find); do { do { if ((sc = *s++) == 0) return (NULL); } while ((char)tolower((unsigned char)sc) != c); } while (_strncasecmp(s, find, len) != 0); s--; } return (char *)(intptr_t)(s); }