/*-

 * 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_read_position.c 189389 2009-03-05 02:19:42Z kientzle $");

static unsigned char nulls[1000];

static unsigned char tmp[1000];

static unsigned char  buff[10000];

size_t data_sizes[] = {0, 5, 511, 512, 513};

static void verify_read_positions(struct archive *a);

static void

verify_read_positions(struct archive *a)

{

	struct archive_entry *ae;

	intmax_t read_position = 0;

	size_t j;

	/* Initial header position is zero. */

	assert(read_position == (intmax_t)archive_read_header_position(a));

	for (j = 0; j < sizeof(data_sizes)/sizeof(data_sizes[0]); ++j) {

		assertA(0 == archive_read_next_header(a, &ae);;

		assertEqualInt(read_position,

		    (intmax_t)archive_read_header_position(a));

		/* Every other entry: read, then skip */

		if (j & 1)

			assertEqualInt(1,

			    archive_read_data(a, tmp, 1));

		assertA(0 == archive_read_data_skip(a));

		/* read_data_skip() doesn't change header_position */

		assertEqualInt(read_position,

		    (intmax_t)archive_read_header_position(a));

		read_position += 512; /* Size of header. */

		read_position += (data_sizes[j] + 511) & ~511;

	}

	assertA(1 == archive_read_next_header(a, &ae);;

	assertEqualInt(read_position, (intmax_t)archive_read_header_position(a));

	assertEqualIntA(a, ARCHIVE_OK, archive_read_close(a));

	assertEqualInt(read_position, (intmax_t)archive_read_header_position(a));

}

/* Check that header_position tracks correctly on read. */

DEFINE_TEST(test_read_position)

{

	struct archive *a;

	struct archive_entry *ae;

	size_t write_pos;

	size_t i;

	/* Sanity test */

	assert(sizeof(nulls) + 512 + 1024 <= sizeof(buff));

	/* Create an archive. */

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

	assertA(0 == archive_write_set_format_pax_restricted(a));

	assertA(0 == archive_write_set_bytes_per_block(a, 512));

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

	for (i = 0; i < sizeof(data_sizes)/sizeof(data_sizes[0]); ++i) {

		/* Create a simple archive_entry. */

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

		archive_entry_set_pathname(ae, "testfile");

		archive_entry_set_mode(ae, S_IFREG);

		archive_entry_set_size(ae, data_sizes[i]);

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

		archive_entry_free(ae);

		assertA(data_sizes[i]

		    == (size_t)archive_write_data(a, nulls, sizeof(nulls)));

	}

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

	assertEqualInt(ARCHIVE_OK, archive_write_free(a));

	/* Read the archive back with a skip function. */

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

	assertA(0 == archive_read_support_format_tar(a));

	assertA(0 == read_open_memory(a, buff, sizeof(buff), 512));

	verify_read_positions(a);

	archive_read_free(a);

	/* Read the archive back without a skip function. */

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

	assertA(0 == archive_read_support_format_tar(a));

	assertA(0 == read_open_memory_minimal(a, buff, sizeof(buff), 512));

	verify_read_positions(a);

	archive_read_free(a);

}