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Annotation of prex-old/usr/lib/libc/string/strcasecmp.c, Revision 1.1

1.1     ! nbrk        1: /*     $NetBSD: strcasecmp.c,v 1.16 2003/08/07 16:43:49 agc Exp $      */
        !             2:
        !             3: /*
        !             4:  * Copyright (c) 1987, 1993
        !             5:  *     The Regents of the University of California.  All rights reserved.
        !             6:  *
        !             7:  * Redistribution and use in source and binary forms, with or without
        !             8:  * modification, are permitted provided that the following conditions
        !             9:  * are met:
        !            10:  * 1. Redistributions of source code must retain the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer.
        !            12:  * 2. Redistributions in binary form must reproduce the above copyright
        !            13:  *    notice, this list of conditions and the following disclaimer in the
        !            14:  *    documentation and/or other materials provided with the distribution.
        !            15:  * 3. Neither the name of the University nor the names of its contributors
        !            16:  *    may be used to endorse or promote products derived from this software
        !            17:  *    without specific prior written permission.
        !            18:  *
        !            19:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            20:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            21:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            22:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            23:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            24:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            25:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            26:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            27:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            28:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            29:  * SUCH DAMAGE.
        !            30:  */
        !            31:
        !            32: #include <sys/cdefs.h>
        !            33: #include <ctype.h>
        !            34: #include <string.h>
        !            35:
        !            36: int
        !            37: strcasecmp(s1, s2)
        !            38:        const char *s1, *s2;
        !            39: {
        !            40:        const unsigned char *us1 = (const unsigned char *)s1,
        !            41:                        *us2 = (const unsigned char *)s2;
        !            42:
        !            43:        while (tolower(*us1) == tolower(*us2++))
        !            44:                if (*us1++ == '\0')
        !            45:                        return (0);
        !            46:        return (tolower(*us1) - tolower(*--us2));
        !            47: }
        !            48:
        !            49: int
        !            50: strncasecmp(s1, s2, n)
        !            51:        const char *s1, *s2;
        !            52:        size_t n;
        !            53: {
        !            54:        if (s1 == NULL || s2 == NULL)
        !            55:                return (0);
        !            56:
        !            57:        if (n != 0) {
        !            58:                const unsigned char *us1 = (const unsigned char *)s1,
        !            59:                                *us2 = (const unsigned char *)s2;
        !            60:
        !            61:                do {
        !            62:                        if (tolower(*us1) != tolower(*us2++))
        !            63:                                return (tolower(*us1) - tolower(*--us2));
        !            64:                        if (*us1++ == '\0')
        !            65:                                break;
        !            66:                } while (--n != 0);
        !            67:        }
        !            68:        return (0);
        !            69: }