Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5191 | serge | 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 | /* |
||
| 14 | |||
| 15 | @deftypefn Supplemental int strncasecmp (const char *@var{s1}, const char *@var{s2}) |
||
| 16 | |||
| 17 | A case-insensitive @code{strncmp}. |
||
| 18 | |||
| 19 | @end deftypefn |
||
| 20 | |||
| 21 | */ |
||
| 22 | |||
| 23 | #if defined(LIBC_SCCS) && !defined(lint) |
||
| 24 | static char sccsid[] = "@(#)strcasecmp.c 5.5 (Berkeley) 11/24/87"; |
||
| 25 | #endif /* LIBC_SCCS and not lint */ |
||
| 26 | |||
| 27 | #include |
||
| 28 | #include |
||
| 29 | |||
| 30 | /* |
||
| 31 | * This array is designed for mapping upper and lower case letter |
||
| 32 | * together for a case independent comparison. The mappings are |
||
| 33 | * based upon ascii character sequences. |
||
| 34 | */ |
||
| 35 | static const unsigned char charmap[] = { |
||
| 36 | '\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007', |
||
| 37 | '\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017', |
||
| 38 | '\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027', |
||
| 39 | '\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037', |
||
| 40 | '\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047', |
||
| 41 | '\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057', |
||
| 42 | '\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067', |
||
| 43 | '\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077', |
||
| 44 | '\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147', |
||
| 45 | '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157', |
||
| 46 | '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167', |
||
| 47 | '\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137', |
||
| 48 | '\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147', |
||
| 49 | '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157', |
||
| 50 | '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167', |
||
| 51 | '\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177', |
||
| 52 | '\200', '\201', '\202', '\203', '\204', '\205', '\206', '\207', |
||
| 53 | '\210', '\211', '\212', '\213', '\214', '\215', '\216', '\217', |
||
| 54 | '\220', '\221', '\222', '\223', '\224', '\225', '\226', '\227', |
||
| 55 | '\230', '\231', '\232', '\233', '\234', '\235', '\236', '\237', |
||
| 56 | '\240', '\241', '\242', '\243', '\244', '\245', '\246', '\247', |
||
| 57 | '\250', '\251', '\252', '\253', '\254', '\255', '\256', '\257', |
||
| 58 | '\260', '\261', '\262', '\263', '\264', '\265', '\266', '\267', |
||
| 59 | '\270', '\271', '\272', '\273', '\274', '\275', '\276', '\277', |
||
| 60 | '\300', '\341', '\342', '\343', '\344', '\345', '\346', '\347', |
||
| 61 | '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357', |
||
| 62 | '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367', |
||
| 63 | '\370', '\371', '\372', '\333', '\334', '\335', '\336', '\337', |
||
| 64 | '\340', '\341', '\342', '\343', '\344', '\345', '\346', '\347', |
||
| 65 | '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357', |
||
| 66 | '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367', |
||
| 67 | '\370', '\371', '\372', '\373', '\374', '\375', '\376', '\377', |
||
| 68 | }; |
||
| 69 | |||
| 70 | int |
||
| 71 | strncasecmp(const char *s1, const char *s2, register size_t n) |
||
| 72 | { |
||
| 73 | register unsigned char u1, u2; |
||
| 74 | |||
| 75 | for (; n != 0; --n) { |
||
| 76 | u1 = (unsigned char) *s1++; |
||
| 77 | u2 = (unsigned char) *s2++; |
||
| 78 | if (charmap[u1] != charmap[u2]) { |
||
| 79 | return charmap[u1] - charmap[u2]; |
||
| 80 | } |
||
| 81 | if (u1 == '\0') { |
||
| 82 | return 0; |
||
| 83 | } |
||
| 84 | } |
||
| 85 | return 0; |
||
| 86 | } |