| /* |
| * 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 1.6 2003-11-16 09:36:43 guy Exp $"; |
| #endif |
| |
| #include <tcpdump-stdinc.h> |
| |
| #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 const 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 const 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 const 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]); |
| } |