git.distorted.org.uk Git - u/mdw/putty/blob - mac/stricmp.c

   1
   2 #include "putty.h"
   3
   4 #define strcasecmp stricmp
   5 #define strncasecmp strnicmp
   6 #define _DIAGASSERT(e) /* nothing */
   7
   8 /*
   9  * Copyright (c) 1987, 1993
  10  *      The Regents of the University of California.  All rights reserved.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  * 3. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  * From NetBSD: strcasecmp.c,v 1.12 2000/01/22 22:19:20 mycroft Exp
  37  */
  38
  39 #include <ctype.h>
  40
  41 typedef unsigned char u_char;
  42
  43 int
  44 strcasecmp(s1, s2)
  45         const char *s1, *s2;
  46 {
  47         const u_char *us1 = (const u_char *)s1,
  48                         *us2 = (const u_char *)s2;
  49
  50         _DIAGASSERT(s1 != NULL);
  51         _DIAGASSERT(s2 != NULL);
  52
  53         while (tolower(*us1) == tolower(*us2++))
  54                 if (*us1++ == '\0')
  55                         return (0);
  56         return (tolower(*us1) - tolower(*--us2));
  57 }
  58
  59 int
  60 strncasecmp(s1, s2, n)
  61         const char *s1, *s2;
  62         size_t n;
  63 {
  64
  65         _DIAGASSERT(s1 != NULL);
  66         _DIAGASSERT(s2 != NULL);
  67         if (s1 == NULL || s2 == NULL)
  68                 return (0);
  69
  70         if (n != 0) {
  71                 const u_char *us1 = (const u_char *)s1,
  72                                 *us2 = (const u_char *)s2;
  73
  74                 do {
  75                         if (tolower(*us1) != tolower(*us2++))
  76                                 return (tolower(*us1) - tolower(*--us2));
  77                         if (*us1++ == '\0')
  78                                 break;
  79                 } while (--n != 0);
  80         }
  81         return (0);
  82 }