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Member "ghostview-1.5/strcasecmp.c" (25 Sep 1992, 4167 Bytes) of package /linux/misc/old/ghost/gnu/ghostview/ghostview-1.5.tar.gz:


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    1 /*
    2  * Copyright (c) 1987 Regents of the University of California.
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms are permitted
    6  * provided that: (1) source distributions retain this entire copyright
    7  * notice and comment, and (2) distributions including binaries display
    8  * the following acknowledgement:  ``This product includes software
    9  * developed by the University of California, Berkeley and its contributors''
   10  * in the documentation or other materials provided with the distribution
   11  * and in all advertising materials mentioning features or use of this
   12  * software. Neither the name of the University nor the names of its
   13  * contributors may be used to endorse or promote products derived
   14  * from this software without specific prior written permission.
   15  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
   17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
   18  */
   19 
   20 #include "stdc.h"
   21 #include <sys/types.h>
   22 
   23 #ifdef VMS
   24 #include <stddef.h>
   25 #endif
   26 
   27 #if defined(LIBC_SCCS) && !defined(lint)
   28 static const char sccsid[] = "@(#)strcasecmp.c  5.9 (Berkeley) 6/1/90";
   29 #endif /* LIBC_SCCS and not lint */
   30 
   31 /*
   32  * This array is designed for mapping upper and lower case letter
   33  * together for a case independent comparison.  The mappings are
   34  * based upon ascii character sequences.
   35  */
   36 static const unsigned char charmap[] = {
   37     '\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
   38     '\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
   39     '\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
   40     '\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
   41     '\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047',
   42     '\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057',
   43     '\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067',
   44     '\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077',
   45     '\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
   46     '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
   47     '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
   48     '\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137',
   49     '\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
   50     '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
   51     '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
   52     '\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177',
   53     '\200', '\201', '\202', '\203', '\204', '\205', '\206', '\207',
   54     '\210', '\211', '\212', '\213', '\214', '\215', '\216', '\217',
   55     '\220', '\221', '\222', '\223', '\224', '\225', '\226', '\227',
   56     '\230', '\231', '\232', '\233', '\234', '\235', '\236', '\237',
   57     '\240', '\241', '\242', '\243', '\244', '\245', '\246', '\247',
   58     '\250', '\251', '\252', '\253', '\254', '\255', '\256', '\257',
   59     '\260', '\261', '\262', '\263', '\264', '\265', '\266', '\267',
   60     '\270', '\271', '\272', '\273', '\274', '\275', '\276', '\277',
   61     '\300', '\301', '\302', '\303', '\304', '\305', '\306', '\307',
   62     '\310', '\311', '\312', '\313', '\314', '\315', '\316', '\317',
   63     '\320', '\321', '\322', '\323', '\324', '\325', '\326', '\327',
   64     '\330', '\331', '\332', '\333', '\334', '\335', '\336', '\337',
   65     '\340', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
   66     '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
   67     '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
   68     '\370', '\371', '\372', '\373', '\374', '\375', '\376', '\377',
   69 };
   70 
   71 int
   72 strcasecmp(s1, s2)
   73     const char *s1, *s2;
   74 {
   75     register const unsigned char *cm = charmap,
   76             *us1 = (const unsigned char *)s1,
   77             *us2 = (const unsigned char *)s2;
   78 
   79     while (cm[*us1] == cm[*us2++])
   80         if (*us1++ == '\0')
   81             return (0);
   82     return (cm[*us1] - cm[*--us2]);
   83 }
   84 
   85 int
   86 strncasecmp(s1, s2, n)
   87     const char *s1, *s2;
   88     register size_t n;
   89 {
   90     if (n != 0) {
   91         register const unsigned char *cm = charmap,
   92                 *us1 = (const unsigned char *)s1,
   93                 *us2 = (const unsigned char *)s2;
   94 
   95         do {
   96             if (cm[*us1] != cm[*us2++])
   97                 return (cm[*us1] - cm[*--us2]);
   98             if (*us1++ == '\0')
   99                 break;
  100         } while (--n != 0);
  101     }
  102     return (0);
  103 }