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Annotation of prex-old/usr/lib/libc/string/strcasecmp.c, Revision 1.1.1.1

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: }