/*-
 * Copyright (c) 2009 David Schultz <das@FreeBSD.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include <sys/param.h>
#include <sys/mman.h>
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>

#include <atf-c.h>

static void *
makebuf(size_t len, int guard_at_end)
{
	char *buf;
	size_t alloc_size, page_size;

	page_size = getpagesize();
	alloc_size = roundup2(len, page_size) + page_size;

	buf = mmap(NULL, alloc_size, PROT_READ | PROT_WRITE, MAP_ANON, -1, 0);
	ATF_CHECK(buf);
	if (guard_at_end) {
		ATF_CHECK(munmap(buf + alloc_size - page_size, page_size) == 0);
		return (buf + alloc_size - page_size - len);
	} else {
		ATF_CHECK(munmap(buf, page_size) == 0);
		return (buf + page_size);
	}
}

static void
test_wcsnlen(const wchar_t *s)
{
	wchar_t *s1;
	size_t size, len, bufsize;
	int i;

	size = wcslen(s) + 1;
	for (i = 0; i <= 1; i++) {
		for (bufsize = 0; bufsize <= size + 10; bufsize++) {
			s1 = makebuf(bufsize * sizeof(wchar_t), i);
			wmemcpy(s1, s, bufsize <= size ? bufsize : size);
			len = (size > bufsize) ? bufsize : size - 1;
			ATF_CHECK(wcsnlen(s1, bufsize) == len);
		}
	}
}

ATF_TC_WITHOUT_HEAD(nul);
ATF_TC_BODY(nul, tc)
{

	test_wcsnlen(L"");
}

ATF_TC_WITHOUT_HEAD(foo);
ATF_TC_BODY(foo, tc)
{

	test_wcsnlen(L"foo");
}

ATF_TC_WITHOUT_HEAD(glorp);
ATF_TC_BODY(glorp, tc)
{

	test_wcsnlen(L"glorp");
}

ATF_TP_ADD_TCS(tp)
{

	ATF_TP_ADD_TC(tp, nul);
	ATF_TP_ADD_TC(tp, foo);
	ATF_TP_ADD_TC(tp, glorp);

	return (atf_no_error());
}