/* * Copyright (c) 1987 Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms are permitted * provided that this notice is preserved and that due credit is given * to the University of California at Berkeley. The name of the University * may not be used to endorse or promote products derived from this * software without specific written prior permission. This software * is provided ``as is'' without express or implied warranty. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #ifndef lint static const char rcsid[] _U_ = "@(#) $Header: /tcpdump/master/tcpdump/strcasecmp.c,v 1.4.2.2 2003/11/16 08:51:57 guy Exp $"; #endif #include #include "interface.h" /* * 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 u_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', '\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', '\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 u_char *cm = charmap, *us1 = (u_char *)s1, *us2 = (u_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 int n; { register u_char *cm = charmap, *us1 = (u_char *)s1, *us2 = (u_char *)s2; while (--n >= 0 && cm[*us1] == cm[*us2++]) if (*us1++ == '\0') return(0); return(n < 0 ? 0 : cm[*us1] - cm[*--us2]); }