wcsncasecmp.c revision 189136
156160Sru/*- 2146515Sru * Copyright (c) 2009 David Schultz <das@FreeBSD.org> 356160Sru * All rights reserved. 4146515Sru * 5114472Sru * Redistribution and use in source and binary forms, with or without 656160Sru * modification, are permitted provided that the following conditions 756160Sru * are met: 856160Sru * 1. Redistributions of source code must retain the above copyright 956160Sru * notice, this list of conditions and the following disclaimer. 1056160Sru * 2. Redistributions in binary form must reproduce the above copyright 1156160Sru * notice, this list of conditions and the following disclaimer in the 1256160Sru * documentation and/or other materials provided with the distribution. 1356160Sru * 1456160Sru * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1556160Sru * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1656160Sru * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1756160Sru * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1856160Sru * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1956160Sru * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2056160Sru * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2156160Sru * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2256160Sru * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2356160Sru * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24146515Sru * SUCH DAMAGE. 25146515Sru */ 2656160Sru 2756160Sru#include <sys/cdefs.h> 2856160Sru__FBSDID("$FreeBSD: head/lib/libc/string/wcsncasecmp.c 189136 2009-02-28 06:00:58Z das $"); 29146515Sru 3093139Sru#include <wchar.h> 3156160Sru#include <wctype.h> 3256160Sru 3356160Sruint 3493139Sruwcsncasecmp(const wchar_t *s1, const wchar_t *s2, size_t n) 35100513Sru{ 36146515Sru wchar_t c1, c2; 37146515Sru 38146515Sru if (n == 0) 39146515Sru return (0); 40146515Sru for (; *s1; s1++, s2++) { 41146515Sru c1 = towlower(*s1); 42146515Sru c2 = towlower(*s2); 43146515Sru if (c1 != c2) 44146515Sru return ((int)c1 - c2); 45146515Sru if (--n == 0) 46146515Sru return (0); 4756160Sru } 4856160Sru return (-*s2); 4956160Sru} 5056160Sru