/*-

 * 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 "archive_platform.h"

__FBSDID("$FreeBSD: src/lib/libarchive/archive_read_extract.c,v 1.61 2008/05/26 17:00:22 kientzle Exp $");

#ifdef HAVE_SYS_TYPES_H

#include <sys/types.h>

#endif

#ifdef HAVE_ERRNO_H

#include <errno.h>

#endif

#ifdef HAVE_STRING_H

#include <string.h>

#endif

#include "archive.h"

#include "archive_entry.h"

#include "archive_private.h"

#include "archive_read_private.h"

static int	copy_data(struct archive *ar, struct archive *aw);

static int	archive_read_extract_cleanup(struct archive_read *);

/* Retrieve an extract object without initialising the associated

 * archive_write_disk object.

 */

struct archive_read_extract *

__archive_read_get_extract(struct archive_read *a)

{

	if (a->extract == NULL) {

		a->extract = (struct archive_read_extract *)calloc(1, sizeof(*a->extract));

		if (a->extract == NULL) {

			archive_set_error(&a->archive, ENOMEM, "Can't extract");

			return (NULL);

		}

		a->cleanup_archive_extract = archive_read_extract_cleanup;

	}

	return (a->extract);

}

/*

 * Cleanup function for archive_extract.

 */

static int

archive_read_extract_cleanup(struct archive_read *a)

{

	int ret = ARCHIVE_OK;

	if (a->extract->ad != NULL) {

		ret = archive_write_free(a->extract->ad);

	}

	free(a->extract);

	a->extract = NULL;

	return (ret);

}

int

archive_read_extract2(struct archive *_a, struct archive_entry *entry,

    struct archive *ad)

{

	struct archive_read *a = (struct archive_read *)_a;

	int r, r2;

	/* Set up for this particular entry. */

	if (a->skip_file_set)

		archive_write_disk_set_skip_file(ad,

		    a->skip_file_dev, a->skip_file_ino);

	r = archive_write_header(ad, entry);

	if (r < ARCHIVE_WARN)

		r = ARCHIVE_WARN;

	if (r != ARCHIVE_OK)

		/* If _write_header failed, copy the error. */

 		archive_copy_error(&a->archive, ad);

	else if (!archive_entry_size_is_set(entry) || archive_entry_size(entry) > 0)

		/* Otherwise, pour data into the entry. */

		r = copy_data(_a, ad);

	r2 = archive_write_finish_entry(ad);

	if (r2 < ARCHIVE_WARN)

		r2 = ARCHIVE_WARN;

	/* Use the first message. */

	if (r2 != ARCHIVE_OK && r == ARCHIVE_OK)

		archive_copy_error(&a->archive, ad);

	/* Use the worst error return. */

	if (r2 < r)

		r = r2;

	return (r);

}

void

archive_read_extract_set_progress_callback(struct archive *_a,

    void (*progress_func)(void *), void *user_data)

{

	struct archive_read *a = (struct archive_read *)_a;

	struct archive_read_extract *extract = __archive_read_get_extract(a);

	if (extract != NULL) {

		extract->extract_progress = progress_func;

		extract->extract_progress_user_data = user_data;

	}

}

static int

copy_data(struct archive *ar, struct archive *aw)

{

	int64_t offset;

	const void *buff;

	struct archive_read_extract *extract;

	size_t size;

	int r;

	extract = __archive_read_get_extract((struct archive_read *)ar);

	if (extract == NULL)

		return (ARCHIVE_FATAL);

	for (;;) {

		r = archive_read_data_block(ar, &buff, &size, &offset);

		if (r == ARCHIVE_EOF)

			return (ARCHIVE_OK);

		if (r != ARCHIVE_OK)

			return (r);

		r = (int)archive_write_data_block(aw, buff, size, offset);

		if (r < ARCHIVE_WARN)

			r = ARCHIVE_WARN;

		if (r < ARCHIVE_OK) {

			archive_set_error(ar, archive_errno(aw),

			    "%s", archive_error_string(aw));

			return (r);

		}

		if (extract->extract_progress)

			(extract->extract_progress)

			    (extract->extract_progress_user_data);

	}

}