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