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wcsncasecmp.c revision 1.2 
      1 /*	$NetBSD: wcsncasecmp.c,v 1.2 2006/08/26 22:45:52 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (C) 2006 Aleksey Cheusov
      5  *
      6  * This material is provided "as is", with absolutely no warranty expressed
      7  * or implied. Any use is at your own risk.
      8  *
      9  * Permission to use or copy this software for any purpose is hereby granted
     10  * without fee. Permission to modify the code and to distribute modified
     11  * code is also granted without any restrictions.
     12  */
     13 
     14 #include <sys/cdefs.h>
     15 #if defined(LIBC_SCCS) && !defined(lint)
     16 __RCSID("$NetBSD: wcsncasecmp.c,v 1.2 2006/08/26 22:45:52 christos Exp $");
     17 #endif /* LIBC_SCCS and not lint */
     18 
     19 #include "namespace.h"
     20 #include <assert.h>
     21 #include <wchar.h>
     22 #include <wctype.h>
     23 
     24 __weak_alias(wcsncasecmp,_wcsncasecmp)
     25 
     26 int
     27 wcsncasecmp(const wchar_t *s1, const wchar_t *s2, size_t n)
     28 {
     29 	int lc1  = 0;
     30 	int lc2  = 0;
     31 	int diff = 0;
     32 
     33 	_DIAGASSERT(s1);
     34 	_DIAGASSERT(s2);
     35 
     36 	while (n--) {
     37 		lc1 = towlower (*s1);
     38 		lc2 = towlower (*s2);
     39 
     40 		diff = lc1 - lc2;
     41 		if (diff)
     42 			return diff;
     43 
     44 		if (!lc1)
     45 			return 0;
     46 
     47 		++s1;
     48 		++s2;
     49 	}
     50 
     51 	return 0;
     52 }
     53