1  /*-
 2   * Copyright (c) 2009 David Schultz <das@FreeBSD.org>
 3   * All rights reserved.
 4   *
 5   * Redistribution and use in source and binary forms, with or without
 6   * modification, are permitted provided that the following conditions
 7   * are met:
 8   * 1. Redistributions of source code must retain the above copyright
 9   *    notice, this list of conditions and the following disclaimer.
10   * 2. Redistributions in binary form must reproduce the above copyright
11   *    notice, this list of conditions and the following disclaimer in the
12   *    documentation and/or other materials provided with the distribution.
13   *
14   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17   * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24   * SUCH DAMAGE.
25   */
26  
27  #include <sys/cdefs.h>
28  __FBSDID("$FreeBSD: src/lib/libc/string/wcsncasecmp.c,v 1.1 2009/02/28 06:00:58 das Exp $");
29  
30  #include "xlocale_private.h"
31  
32  #include <wchar.h>
33  #include <wctype.h>
34  
35  int
36  wcsncasecmp_l(const wchar_t *s1, const wchar_t *s2, size_t n, locale_t loc)
37  {
38  	wchar_t c1, c2;
39  
40  	if (n == 0)
41  		return (0);
42  	for (; *s1; s1++, s2++) {
43  		c1 = towlower_l(*s1, loc);
44  		c2 = towlower_l(*s2, loc);
45  		if (c1 != c2)
46  			return ((int)c1 - c2);
47  		if (--n == 0)
48  			return (0);
49  	}
50  	return (-*s2);
51  }
52  
53  int
54  wcsncasecmp(const wchar_t *s1, const wchar_t *s2, size_t n) {
55  	return wcsncasecmp_l(s1, s2, n, __current_locale());
56  }
57