/*-

 * 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("$FreeBSD$");

#ifdef HAVE_ERRNO_H

#include <errno.h>

#endif

#ifdef HAVE_STDLIB_H

#include <stdlib.h>

#endif

#include "archive.h"

#include "archive_write_private.h"

struct write_grzip {

	struct archive_write_program_data *pdata;

};

static int archive_write_grzip_open(struct archive_write_filter *);

static int archive_write_grzip_options(struct archive_write_filter *,

		    const char *, const char *);

static int archive_write_grzip_write(struct archive_write_filter *,

		    const void *, size_t);

static int archive_write_grzip_close(struct archive_write_filter *);

static int archive_write_grzip_free(struct archive_write_filter *);

int

archive_write_add_filter_grzip(struct archive *_a)

{

	struct archive_write_filter *f = __archive_write_allocate_filter(_a);

	struct write_grzip *data;

	archive_check_magic(_a, ARCHIVE_WRITE_MAGIC,

	    ARCHIVE_STATE_NEW, "archive_write_add_filter_grzip");

	data = calloc(1, sizeof(*data));

	if (data == NULL) {

		archive_set_error(_a, ENOMEM, "Can't allocate memory");

		return (ARCHIVE_FATAL);

	}

	data->pdata = __archive_write_program_allocate("grzip");

	if (data->pdata == NULL) {

		free(data);

		archive_set_error(_a, ENOMEM, "Can't allocate memory");

		return (ARCHIVE_FATAL);

	}

	f->name = "grzip";

	f->code = ARCHIVE_FILTER_GRZIP;

	f->data = data;

	f->open = archive_write_grzip_open;

	f->options = archive_write_grzip_options;

	f->write = archive_write_grzip_write;

	f->close = archive_write_grzip_close;

	f->free = archive_write_grzip_free;

	/* Note: This filter always uses an external program, so we

	 * return "warn" to inform of the fact. */

	archive_set_error(_a, ARCHIVE_ERRNO_MISC,

	    "Using external grzip program for grzip compression");

	return (ARCHIVE_WARN);

}

static int

archive_write_grzip_options(struct archive_write_filter *f, const char *key,

    const char *value)

{

	(void)f; /* UNUSED */

	(void)key; /* UNUSED */

	(void)value; /* UNUSED */

	/* Note: The "warn" return is just to inform the options

	 * supervisor that we didn't handle it.  It will generate

	 * a suitable error if no one used this option. */

	return (ARCHIVE_WARN);

}

static int

archive_write_grzip_open(struct archive_write_filter *f)

{

	struct write_grzip *data = (struct write_grzip *)f->data;

	return __archive_write_program_open(f, data->pdata, "grzip");

}

static int

archive_write_grzip_write(struct archive_write_filter *f,

    const void *buff, size_t length)

{

	struct write_grzip *data = (struct write_grzip *)f->data;

	return __archive_write_program_write(f, data->pdata, buff, length);

}

static int

archive_write_grzip_close(struct archive_write_filter *f)

{

	struct write_grzip *data = (struct write_grzip *)f->data;

	return __archive_write_program_close(f, data->pdata);

}

static int

archive_write_grzip_free(struct archive_write_filter *f)

{

	struct write_grzip *data = (struct write_grzip *)f->data;

	__archive_write_program_free(data->pdata);

	free(data);

	return (ARCHIVE_OK);

}