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Annotation of GNUtools/libg++/libiberty/strcasecmp.c, revision 1.1.1.1

1.1       root        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 this notice is preserved and that due credit is given
                      7:  * to the University of California at Berkeley. The name of the University
                      8:  * may not be used to endorse or promote products derived from this
                      9:  * software without specific written prior permission. This software
                     10:  * is provided ``as is'' without express or implied warranty.
                     11:  */
                     12: 
                     13: #if defined(LIBC_SCCS) && !defined(lint)
                     14: static char sccsid[] = "@(#)strcasecmp.c       5.5 (Berkeley) 11/24/87";
                     15: #endif /* LIBC_SCCS and not lint */
                     16: 
                     17: #include <sys/types.h>
                     18: #include <string.h>
                     19: 
                     20: /*
                     21:  * This array is designed for mapping upper and lower case letter
                     22:  * together for a case independent comparison.  The mappings are
                     23: p * based upon ascii character sequences.
                     24:  */
                     25: static unsigned char charmap[] = {
                     26:        '\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
                     27:        '\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
                     28:        '\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
                     29:        '\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
                     30:        '\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047',
                     31:        '\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057',
                     32:        '\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067',
                     33:        '\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077',
                     34:        '\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
                     35:        '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
                     36:        '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
                     37:        '\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137',
                     38:        '\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
                     39:        '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
                     40:        '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
                     41:        '\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177',
                     42:        '\200', '\201', '\202', '\203', '\204', '\205', '\206', '\207',
                     43:        '\210', '\211', '\212', '\213', '\214', '\215', '\216', '\217',
                     44:        '\220', '\221', '\222', '\223', '\224', '\225', '\226', '\227',
                     45:        '\230', '\231', '\232', '\233', '\234', '\235', '\236', '\237',
                     46:        '\240', '\241', '\242', '\243', '\244', '\245', '\246', '\247',
                     47:        '\250', '\251', '\252', '\253', '\254', '\255', '\256', '\257',
                     48:        '\260', '\261', '\262', '\263', '\264', '\265', '\266', '\267',
                     49:        '\270', '\271', '\272', '\273', '\274', '\275', '\276', '\277',
                     50:        '\300', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
                     51:        '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
                     52:        '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
                     53:        '\370', '\371', '\372', '\333', '\334', '\335', '\336', '\337',
                     54:        '\340', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
                     55:        '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
                     56:        '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
                     57:        '\370', '\371', '\372', '\373', '\374', '\375', '\376', '\377',
                     58: };
                     59: 
                     60: int
                     61: strcasecmp(s1, s2)
                     62:     char *s1, *s2;
                     63: {
                     64:     register unsigned char u1, u2;
                     65: 
                     66:     for (;;) {
                     67:        u1 = (unsigned char) *s1++;
                     68:        u2 = (unsigned char) *s2++;
                     69:        if (charmap[u1] != charmap[u2]) {
                     70:            return charmap[u1] - charmap[u2];
                     71:        }
                     72:        if (u1 == '\0') {
                     73:            return 0;
                     74:        }
                     75:     }
                     76: }
                     77: 

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