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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/debug.h>
#include <sys/types.h>
#ifdef _KERNEL
#include <sys/systm.h>
#include <sys/zmod.h>
typedef size_t zlen_t;
#define compress_func z_compress_level
#define uncompress_func z_uncompress
#else /* _KERNEL */
#include <strings.h>
#include <zlib.h>
typedef uLongf zlen_t;
#define compress_func compress2
#define uncompress_func uncompress
#endif
size_t
gzip_compress(void *s_start, void *d_start, size_t s_len, size_t d_len, int n)
{
zlen_t dstlen = d_len;
ASSERT(d_len <= s_len);
if (compress_func(d_start, &dstlen, s_start, s_len, n) != Z_OK) {
if (d_len != s_len)
return (s_len);
bcopy(s_start, d_start, s_len);
return (s_len);
}
return ((size_t) dstlen);
}
/*ARGSUSED*/
int
gzip_decompress(void *s_start, void *d_start, size_t s_len, size_t d_len, int n)
{
zlen_t dstlen = d_len;
ASSERT(d_len >= s_len);
if (uncompress_func(d_start, &dstlen, s_start, s_len) != Z_OK)
return (-1);
return (0);
}
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