usr/src/lib/libbc/libc/gen/common/stricmp.c

   1 /*
   2  * Copyright 1990 Sun Microsystems, Inc.  All rights reserved.
   3  * Use is subject to license terms.
   4  */
   5
   6 /*
   7  * Copyright (c) 1987 Regents of the University of California.
   8  * All rights reserved.  The Berkeley software License Agreement
   9  * specifies the terms and conditions for redistribution.
  10  */
  11
  12 #pragma ident   "%Z%%M% %I%     %E% SMI"
  13
  14 /*
  15  * This array is designed for mapping upper and lower case letter
  16  * together for a case independent comparison.  The mappings are
  17  * based upon ascii character sequences.
  18  */
  19 static char charmap[] = {
  20         '\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
  21         '\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
  22         '\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
  23         '\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
  24         '\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047',
  25         '\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057',
  26         '\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067',
  27         '\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077',
  28         '\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
  29         '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
  30         '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
  31         '\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137',
  32         '\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
  33         '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
  34         '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
  35         '\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177',
  36         '\200', '\201', '\202', '\203', '\204', '\205', '\206', '\207',
  37         '\210', '\211', '\212', '\213', '\214', '\215', '\216', '\217',
  38         '\220', '\221', '\222', '\223', '\224', '\225', '\226', '\227',
  39         '\230', '\231', '\232', '\233', '\234', '\235', '\236', '\237',
  40         '\240', '\241', '\242', '\243', '\244', '\245', '\246', '\247',
  41         '\250', '\251', '\252', '\253', '\254', '\255', '\256', '\257',
  42         '\260', '\261', '\262', '\263', '\264', '\265', '\266', '\267',
  43         '\270', '\271', '\272', '\273', '\274', '\275', '\276', '\277',
  44         '\300', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
  45         '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
  46         '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
  47         '\370', '\371', '\372', '\333', '\334', '\335', '\336', '\337',
  48         '\340', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
  49         '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
  50         '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
  51         '\370', '\371', '\372', '\373', '\374', '\375', '\376', '\377',
  52 };
  53
  54 int
  55 strcasecmp(char *s1, char *s2)
  56 {
  57         char *cm = charmap;
  58
  59         while (cm[*s1] == cm[*s2++])
  60                 if (*s1++ == '\0')
  61                         return (0);
  62         return(cm[*s1] - cm[*--s2]);
  63 }
  64
  65 int
  66 strncasecmp(char *s1, char *s2, int n)
  67 {
  68         char *cm = charmap;
  69
  70         while (--n >= 0 && cm[*s1] == cm[*s2++])
  71                 if (*s1++ == '\0')
  72                         return (0);
  73         return(n < 0 ? 0 : cm[*s1] - cm[*--s2]);
  74 }
  75
  76 /*
  77  *  For 4.0 compatibility
  78  */
  79 int
  80 stricmp(char *s1, char *s2)
  81 {
  82         return (strcasecmp(s1, s2));
  83 }
  84
  85 int
  86 strnicmp(char *s1, char *s2, int n)
  87 {
  88         return (strncasecmp(s1, s2, n));
  89 }