/*-

 * Copyright (c) 2003-2007 Tim Kientzle

 * 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(S) ``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(S) 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 "test.h"

__FBSDID("$FreeBSD: head/lib/libarchive/test/test_empty_write.c 189308 2009-03-03 17:02:51Z kientzle $");

DEFINE_TEST(test_empty_write)

{

	char buff[32768];

	struct archive_entry *ae;

	struct archive *a;

	size_t used;

	int r;

	/*

	 * Exercise a zero-byte write to a gzip-compressed archive.

	 */

	/* Create a new archive in memory. */

	assert((a = archive_write_new()) != NULL);

	assertA(0 == archive_write_set_format_ustar(a));

	r = archive_write_add_filter_gzip(a);

	if (r != ARCHIVE_OK && !canGzip()) {

		skipping("Empty write to gzip-compressed archive");

	} else {

		if (r != ARCHIVE_OK && canGzip())

			assertEqualIntA(a, ARCHIVE_WARN, r);

		else

			assertEqualIntA(a, ARCHIVE_OK, r);

		assertEqualIntA(a, ARCHIVE_OK,

		    archive_write_open_memory(a, buff, sizeof(buff), &used));

		/* Write a file to it. */

		assert((ae = archive_entry_new()) != NULL);

		archive_entry_copy_pathname(ae, "file");

		archive_entry_set_mode(ae, S_IFREG | 0755);

		archive_entry_set_size(ae, 0);

		assertA(0 == archive_write_header(a, ae));

		archive_entry_free(ae);

		/* THE TEST: write zero bytes to this entry. */

		/* This used to crash. */

		assertEqualIntA(a, 0, archive_write_data(a, "", 0));

		/* Close out the archive. */

		assertEqualIntA(a, ARCHIVE_OK, archive_write_close(a));

		assertEqualInt(ARCHIVE_OK, archive_write_free(a));

	}

	/*

	 * Again, with bzip2 compression.

	 */

	/* Create a new archive in memory. */

	assert((a = archive_write_new()) != NULL);

	assertA(0 == archive_write_set_format_ustar(a));

	r = archive_write_add_filter_bzip2(a);

	if (r != ARCHIVE_OK && !canBzip2()) {

		skipping("Empty write to bzip2-compressed archive");

	} else {

		if (r != ARCHIVE_OK && canBzip2())

			assertEqualIntA(a, ARCHIVE_WARN, r);

		else

			assertEqualIntA(a, ARCHIVE_OK, r);

		assertEqualIntA(a, ARCHIVE_OK,

		    archive_write_open_memory(a, buff, sizeof(buff), &used));

		/* Write a file to it. */

		assert((ae = archive_entry_new()) != NULL);

		archive_entry_copy_pathname(ae, "file");

		archive_entry_set_mode(ae, S_IFREG | 0755);

		archive_entry_set_size(ae, 0);

		assertA(0 == archive_write_header(a, ae));

		archive_entry_free(ae);

		/* THE TEST: write zero bytes to this entry. */

		assertEqualIntA(a, 0, archive_write_data(a, "", 0));

		/* Close out the archive. */

		assertEqualIntA(a, ARCHIVE_OK, archive_write_close(a));

		assertEqualInt(ARCHIVE_OK, archive_write_free(a));

	}

	/*

	 * For good measure, one more time with no compression.

	 */

	/* Create a new archive in memory. */

	assert((a = archive_write_new()) != NULL);

	assertA(0 == archive_write_set_format_ustar(a));

	assertA(0 == archive_write_add_filter_none(a));

	assertA(0 == archive_write_open_memory(a, buff, sizeof(buff), &used));

	/* Write a file to it. */

	assert((ae = archive_entry_new()) != NULL);

	archive_entry_copy_pathname(ae, "file");

	archive_entry_set_mode(ae, S_IFREG | 0755);

	archive_entry_set_size(ae, 0);

	assertA(0 == archive_write_header(a, ae));

	archive_entry_free(ae);

	/* THE TEST: write zero bytes to this entry. */

	assertEqualIntA(a, 0, archive_write_data(a, "", 0));

	/* Close out the archive. */

	assertEqualIntA(a, ARCHIVE_OK, archive_write_close(a));

	assertEqualInt(ARCHIVE_OK, archive_write_free(a));

}