xref: /src/lib/libc/string/wcscasecmp.c

/*	$NetBSD: wcscasecmp.c,v 1.3 2013/04/18 23:24:27 joerg Exp $	*/

/*
 * Copyright (C) 2006 Aleksey Cheusov
 *
 * This material is provided "as is", with absolutely no warranty expressed
 * or implied. Any use is at your own risk.
 *
 * Permission to use or copy this software for any purpose is hereby granted
 * without fee. Permission to modify the code and to distribute modified
 * code is also granted without any restrictions.
 */

#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: wcscasecmp.c,v 1.3 2013/04/18 23:24:27 joerg Exp $");
#endif /* LIBC_SCCS and not lint */

#include "namespace.h"
#include <assert.h>
#include <wchar.h>
#include <wctype.h>
#include <locale.h>
#include "setlocale_local.h"

__weak_alias(wcscasecmp,_wcscasecmp)
__weak_alias(wcscasecmp_l,_wcscasecmp_l)

int
wcscasecmp_l(const wchar_t *s1, const wchar_t *s2, locale_t loc)
{
	int lc1  = 0;
	int lc2  = 0;
	int diff = 0;

	if (loc == NULL)
		loc = _C_locale;

	_DIAGASSERT(s1);
	_DIAGASSERT(s2);

	for (;;) {
		lc1 = towlower_l(*s1, loc);
		lc2 = towlower_l(*s2, loc);

		diff = lc1 - lc2;
		if (diff)
			return diff;

		if (!lc1)
			return 0;

		++s1;
		++s2;
	}
}

int
wcscasecmp(const wchar_t *s1, const wchar_t *s2)
{
	return wcscasecmp_l(s1, s2, *_current_locale());
}