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Annotation of embedaddon/tmux/compat/strcasestr.c, revision 1.1

1.1     ! misho       1: /*     $OpenBSD: strcasestr.c,v 1.3 2006/03/31 05:34:55 deraadt Exp $  */
        !             2: /*     $NetBSD: strcasestr.c,v 1.2 2005/02/09 21:35:47 kleink Exp $    */
        !             3: 
        !             4: /*-
        !             5:  * Copyright (c) 1990, 1993
        !             6:  *     The Regents of the University of California.  All rights reserved.
        !             7:  *
        !             8:  * This code is derived from software contributed to Berkeley by
        !             9:  * Chris Torek.
        !            10:  *
        !            11:  * Redistribution and use in source and binary forms, with or without
        !            12:  * modification, are permitted provided that the following conditions
        !            13:  * are met:
        !            14:  * 1. Redistributions of source code must retain the above copyright
        !            15:  *    notice, this list of conditions and the following disclaimer.
        !            16:  * 2. Redistributions in binary form must reproduce the above copyright
        !            17:  *    notice, this list of conditions and the following disclaimer in the
        !            18:  *    documentation and/or other materials provided with the distribution.
        !            19:  * 3. Neither the name of the University nor the names of its contributors
        !            20:  *    may be used to endorse or promote products derived from this software
        !            21:  *    without specific prior written permission.
        !            22:  *
        !            23:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            24:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            25:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            26:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            27:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            28:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            29:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            30:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            31:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            32:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            33:  * SUCH DAMAGE.
        !            34:  */
        !            35: 
        !            36: #include <ctype.h>
        !            37: #include <string.h>
        !            38: 
        !            39: #include "compat.h"
        !            40: 
        !            41: /*
        !            42:  * Find the first occurrence of find in s, ignore case.
        !            43:  */
        !            44: char *
        !            45: strcasestr(const char *s, const char *find)
        !            46: {
        !            47:        char c, sc;
        !            48:        size_t len;
        !            49: 
        !            50:        if ((c = *find++) != 0) {
        !            51:                c = (char)tolower((unsigned char)c);
        !            52:                len = strlen(find);
        !            53:                do {
        !            54:                        do {
        !            55:                                if ((sc = *s++) == 0)
        !            56:                                        return (NULL);
        !            57:                        } while ((char)tolower((unsigned char)sc) != c);
        !            58:                } while (strncasecmp(s, find, len) != 0);
        !            59:                s--;
        !            60:        }
        !            61:        return ((char *)s);
        !            62: }