155 lines
4.6 KiB
C
155 lines
4.6 KiB
C
/*
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* Copyright (c) 1997, 98, 2000 Motoyuki Kasahara
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*
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* This programs is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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/*
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* This program requires the following Autoconf macros:
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* AC_C_CONST
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* AC_TYPE_SIZE_T
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif /* HAVE_CONFIG_H */
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#include <sys/types.h>
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/* for DOS16 size_t definition */
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#include <stdlib.h>
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/*
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* Character comparison table used in strcasecmp() and strncasecmp().
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*/
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static const unsigned char comparison_table[] = {
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/* 0x00 -- 0x0f */
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'\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
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'\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
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/* 0x10 -- 0x1f */
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'\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
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'\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
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/* 0x20 -- 0x2f */
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'\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047',
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'\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057',
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/* 0x30 -- 0x3f */
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'\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067',
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'\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077',
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/* 0x40 -- 0x4f */
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'\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
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'\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
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/* 0x50 -- 0x5f */
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'\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
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'\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137',
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/* 0x60 -- 0x6f */
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'\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
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'\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
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/* 0x70 -- 0x7f */
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'\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
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'\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177',
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/* 0x80 -- 0x8f */
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'\200', '\201', '\202', '\203', '\204', '\205', '\206', '\207',
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'\210', '\211', '\212', '\213', '\214', '\215', '\216', '\217',
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/* 0x90 -- 0x9f */
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'\220', '\221', '\222', '\223', '\224', '\225', '\226', '\227',
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'\230', '\231', '\232', '\233', '\234', '\235', '\236', '\237',
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/* 0xa0 -- 0xaf */
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'\240', '\241', '\242', '\243', '\244', '\245', '\246', '\247',
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'\250', '\251', '\252', '\253', '\254', '\255', '\256', '\257',
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/* 0xb0 -- 0xbf */
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'\260', '\261', '\262', '\263', '\264', '\265', '\266', '\267',
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'\270', '\271', '\272', '\273', '\274', '\275', '\276', '\277',
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/* 0xc0 -- 0xcf */
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'\300', '\301', '\302', '\303', '\304', '\305', '\306', '\307',
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'\310', '\311', '\312', '\313', '\314', '\315', '\316', '\317',
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/* 0xd0 -- 0xdf */
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'\320', '\321', '\322', '\323', '\324', '\325', '\326', '\327',
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'\330', '\331', '\332', '\333', '\334', '\335', '\336', '\337',
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/* 0xe0 -- 0xef */
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'\340', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
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'\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
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/* 0xf0 -- 0xff */
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'\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
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'\370', '\371', '\372', '\373', '\374', '\375', '\376', '\377',
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};
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/*
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* Compare strings.
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* Cases in the strings are insensitive.
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*/
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int
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strcasecmp(string1, string2)
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const char *string1;
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const char *string2;
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{
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const unsigned char *string1_p = (const unsigned char *)string1;
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const unsigned char *string2_p = (const unsigned char *)string2;
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int comparison_result;
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while (*string1_p != '\0') {
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comparison_result
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= comparison_table[*string1_p++] - comparison_table[*string2_p++];
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if (comparison_result != 0)
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return comparison_result;
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}
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return -comparison_table[*string2_p];
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}
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/*
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* Compare strings within `n' characters.
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* Cases in the strings are insensitive.
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*/
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int
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strncasecmp(string1, string2, n)
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const char *string1;
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const char *string2;
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size_t n;
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{
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const unsigned char *string1_p = (const unsigned char *)string1;
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const unsigned char *string2_p = (const unsigned char *)string2;
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size_t i = n;
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int comparison_result;
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if (i == 0)
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return 0;
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while (*string1_p != '\0') {
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if (i-- <= 0)
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return 0;
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comparison_result
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= comparison_table[*string1_p++] - comparison_table[*string2_p++];
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if (comparison_result != 0)
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return comparison_result;
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}
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return -comparison_table[*string2_p];
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}
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