131745Sbostic /* 231745Sbostic * Copyright (c) 1987 Regents of the University of California. 331745Sbostic * All rights reserved. The Berkeley software License Agreement 431745Sbostic * specifies the terms and conditions for redistribution. 531745Sbostic */ 631745Sbostic 731745Sbostic #if defined(LIBC_SCCS) && !defined(lint) 8*31747Sbostic static char sccsid[] = "@(#)strcasecmp.c 5.2 (Berkeley) 07/02/87"; 931745Sbostic #endif LIBC_SCCS and not lint 1031745Sbostic 1131745Sbostic /* 12*31747Sbostic * This array is designed for mapping upper and lower case letter 13*31747Sbostic * together for a case independent comparison. The mappings are 14*31747Sbostic * based upon ascii character sequences. 1531745Sbostic */ 16*31747Sbostic static char charmap[] = { 17*31747Sbostic '\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007', 18*31747Sbostic '\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017', 19*31747Sbostic '\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027', 20*31747Sbostic '\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037', 21*31747Sbostic '\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047', 22*31747Sbostic '\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057', 23*31747Sbostic '\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067', 24*31747Sbostic '\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077', 25*31747Sbostic '\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147', 26*31747Sbostic '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157', 27*31747Sbostic '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167', 28*31747Sbostic '\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137', 29*31747Sbostic '\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147', 30*31747Sbostic '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157', 31*31747Sbostic '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167', 32*31747Sbostic '\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177', 33*31747Sbostic '\200', '\201', '\202', '\203', '\204', '\205', '\206', '\207', 34*31747Sbostic '\210', '\211', '\212', '\213', '\214', '\215', '\216', '\217', 35*31747Sbostic '\220', '\221', '\222', '\223', '\224', '\225', '\226', '\227', 36*31747Sbostic '\230', '\231', '\232', '\233', '\234', '\235', '\236', '\237', 37*31747Sbostic '\240', '\241', '\242', '\243', '\244', '\245', '\246', '\247', 38*31747Sbostic '\250', '\251', '\252', '\253', '\254', '\255', '\256', '\257', 39*31747Sbostic '\260', '\261', '\262', '\263', '\264', '\265', '\266', '\267', 40*31747Sbostic '\270', '\271', '\272', '\273', '\274', '\275', '\276', '\277', 41*31747Sbostic '\300', '\341', '\342', '\343', '\344', '\345', '\346', '\347', 42*31747Sbostic '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357', 43*31747Sbostic '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367', 44*31747Sbostic '\370', '\371', '\372', '\333', '\334', '\335', '\336', '\337', 45*31747Sbostic '\340', '\341', '\342', '\343', '\344', '\345', '\346', '\347', 46*31747Sbostic '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357', 47*31747Sbostic '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367', 48*31747Sbostic '\370', '\371', '\372', '\373', '\374', '\375', '\376', '\377', 49*31747Sbostic }; 50*31747Sbostic 5131745Sbostic strcasecmp(s1, s2) 52*31747Sbostic register char *s1, *s2; 5331745Sbostic { 54*31747Sbostic register char *cm = charmap; 5531745Sbostic 56*31747Sbostic while (cm[*s1] == cm[*s2++]) 57*31747Sbostic if (*s1++ == '\0') 5831745Sbostic return(0); 59*31747Sbostic return(cm[*s1] - cm[*--s2]); 6031745Sbostic } 6131745Sbostic 6231745Sbostic strcasencmp(s1, s2, n) 63*31747Sbostic register char *s1, *s2; 64*31747Sbostic register int n; 6531745Sbostic { 66*31747Sbostic register char *cm = charmap; 6731745Sbostic 68*31747Sbostic while (--n >= 0 && cm[*s1] == cm[*s2++]) 69*31747Sbostic if (*s1++ == '\0') 7031745Sbostic return(0); 71*31747Sbostic return(n < 0 ? 0 : cm[*s1] - cm[*--s2]); 7231745Sbostic } 73