1/* 2 * $Id: strcasecmp.c,v 1.4 2003-02-17 01:51:08 srittau Exp $ 3 * 4 * Copyright (c) 1987 Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms are permitted 8 * provided that: (1) source distributions retain this entire copyright 9 * notice and comment, and (2) distributions including binaries display 10 * the following acknowledgement: ``This product includes software 11 * developed by the University of California, Berkeley and its contributors'' 12 * in the documentation or other materials provided with the distribution 13 * and in all advertising materials mentioning features or use of this 14 * software. Neither the name of the University nor the names of its 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 20 */ 21 22#ifdef HAVE_CONFIG_H 23#include "config.h" 24#endif /* HAVE_CONFIG_H */ 25 26# if defined( ibm032 ) 27 28#include <sys/types.h> 29#include <string.h> 30 31#if defined(LIBC_SCCS) && !defined(lint) 32static const char sccsid[] = "@(#)strcasecmp.c 5.9 (Berkeley) 6/1/90"; 33#endif /* LIBC_SCCS and not lint */ 34 35/* 36 * This array is designed for mapping upper and lower case letter 37 * together for a case independent comparison. The mappings are 38 * based upon ascii character sequences. 39 */ 40static u_char charmap[] = { 41 '\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007', 42 '\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017', 43 '\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027', 44 '\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037', 45 '\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047', 46 '\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057', 47 '\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067', 48 '\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077', 49 '\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147', 50 '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157', 51 '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167', 52 '\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137', 53 '\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147', 54 '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157', 55 '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167', 56 '\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177', 57 '\200', '\201', '\202', '\203', '\204', '\205', '\206', '\207', 58 '\210', '\211', '\212', '\213', '\214', '\215', '\216', '\217', 59 '\220', '\221', '\222', '\223', '\224', '\225', '\226', '\227', 60 '\230', '\231', '\232', '\233', '\234', '\235', '\236', '\237', 61 '\240', '\241', '\242', '\243', '\244', '\245', '\246', '\247', 62 '\250', '\251', '\252', '\253', '\254', '\255', '\256', '\257', 63 '\260', '\261', '\262', '\263', '\264', '\265', '\266', '\267', 64 '\270', '\271', '\272', '\273', '\274', '\275', '\276', '\277', 65 '\300', '\301', '\302', '\303', '\304', '\305', '\306', '\307', 66 '\310', '\311', '\312', '\313', '\314', '\315', '\316', '\317', 67 '\320', '\321', '\322', '\323', '\324', '\325', '\326', '\327', 68 '\330', '\331', '\332', '\333', '\334', '\335', '\336', '\337', 69 '\340', '\341', '\342', '\343', '\344', '\345', '\346', '\347', 70 '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357', 71 '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367', 72 '\370', '\371', '\372', '\373', '\374', '\375', '\376', '\377', 73}; 74 75int 76strcasecmp(s1, s2) 77 char *s1, *s2; 78{ 79 register u_char *cm = charmap, 80 *us1 = (u_char *)s1, 81 *us2 = (u_char *)s2; 82 83 while (cm[*us1] == cm[*us2++]) 84 if (*us1++ == '\0') 85 return (0); 86 return (cm[*us1] - cm[*--us2]); 87} 88 89int 90strncasecmp(s1, s2, n) 91 char *s1, *s2; 92 register size_t n; 93{ 94 if (n != 0) { 95 register u_char *cm = charmap, 96 *us1 = (u_char *)s1, 97 *us2 = (u_char *)s2; 98 99 do { 100 if (cm[*us1] != cm[*us2++]) 101 return (cm[*us1] - cm[*--us2]); 102 if (*us1++ == '\0') 103 break; 104 } while (--n != 0); 105 } 106 return (0); 107} 108 109# endif /* ibm032 */ 110