1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. 24 */ 25 26 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 27 /* All Rights Reserved */ 28 29 /* 30 * Portions of this source code were derived from Berkeley 4.3 BSD 31 * under license from the Regents of the University of California. 32 */ 33 34 #include "lint.h" 35 #include <sys/types.h> 36 #include <strings.h> 37 #include <ctype.h> 38 39 int 40 strcasecmp(const char *s1, const char *s2) 41 { 42 extern int charset_is_ascii; 43 extern int ascii_strcasecmp(const char *s1, const char *s2); 44 int *cm; 45 const uchar_t *us1; 46 const uchar_t *us2; 47 48 /* 49 * If we are in a locale that uses the ASCII character set 50 * (C or POSIX), use the fast ascii_strcasecmp() function. 51 */ 52 if (charset_is_ascii) 53 return (ascii_strcasecmp(s1, s2)); 54 55 cm = __trans_lower; 56 us1 = (const uchar_t *)s1; 57 us2 = (const uchar_t *)s2; 58 59 while (cm[*us1] == cm[*us2++]) 60 if (*us1++ == '\0') 61 return (0); 62 return (cm[*us1] - cm[*(us2 - 1)]); 63 }