f0a75d274a
ZFS file system was ported from OpenSolaris operating system. The code in under CDDL license. I'd like to thank all SUN developers that created this great piece of software. Supported by: Wheel LTD (http://www.wheel.pl/) Supported by: The FreeBSD Foundation (http://www.freebsdfoundation.org/) Supported by: Sentex (http://www.sentex.net/)
110 lines
2.6 KiB
C
110 lines
2.6 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#pragma ident "%Z%%M% %I% %E% SMI"
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#include <sys/types.h>
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#include <sys/zmod.h>
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#include "zlib.h"
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/*
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* Uncompress the buffer 'src' into the buffer 'dst'. The caller must store
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* the expected decompressed data size externally so it can be passed in.
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* The resulting decompressed size is then returned through dstlen. This
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* function return Z_OK on success, or another error code on failure.
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*/
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int
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z_uncompress(void *dst, size_t *dstlen, const void *src, size_t srclen)
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{
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z_stream zs;
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int err;
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bzero(&zs, sizeof (zs));
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zs.next_in = (uchar_t *)src;
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zs.avail_in = srclen;
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zs.next_out = dst;
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zs.avail_out = *dstlen;
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if ((err = inflateInit(&zs)) != Z_OK)
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return (err);
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if ((err = inflate(&zs, Z_FINISH)) != Z_STREAM_END) {
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(void) inflateEnd(&zs);
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return (err == Z_OK ? Z_BUF_ERROR : err);
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}
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*dstlen = zs.total_out;
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return (inflateEnd(&zs));
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}
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int
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z_compress_level(void *dst, size_t *dstlen, const void *src, size_t srclen,
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int level)
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{
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z_stream zs;
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int err;
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bzero(&zs, sizeof (zs));
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zs.next_in = (uchar_t *)src;
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zs.avail_in = srclen;
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zs.next_out = dst;
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zs.avail_out = *dstlen;
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if ((err = deflateInit(&zs, level)) != Z_OK)
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return (err);
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if ((err = deflate(&zs, Z_FINISH)) != Z_STREAM_END) {
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(void) deflateEnd(&zs);
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return (err == Z_OK ? Z_BUF_ERROR : err);
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}
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*dstlen = zs.total_out;
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return (deflateEnd(&zs));
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}
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int
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z_compress(void *dst, size_t *dstlen, const void *src, size_t srclen)
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{
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return (z_compress_level(dst, dstlen, src, srclen,
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Z_DEFAULT_COMPRESSION));
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}
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/*
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* Convert a zlib error code into a string error message.
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*/
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const char *
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z_strerror(int err)
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{
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int i = Z_NEED_DICT - err;
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if (i < 0 || i > Z_NEED_DICT - Z_VERSION_ERROR)
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return ("unknown error");
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return (zError(err));
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}
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