zio_compress.h revision c9431fa1e59a88c2f0abf611f25b97af964449e5
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * CDDL HEADER START
fa9e4066f08beec538e775443c5be79dd423fcabahrens *
fa9e4066f08beec538e775443c5be79dd423fcabahrens * The contents of this file are subject to the terms of the
c9431fa1e59a88c2f0abf611f25b97af964449e5ahl * Common Development and Distribution License (the "License").
c9431fa1e59a88c2f0abf611f25b97af964449e5ahl * You may not use this file except in compliance with the License.
fa9e4066f08beec538e775443c5be79dd423fcabahrens *
fa9e4066f08beec538e775443c5be79dd423fcabahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
fa9e4066f08beec538e775443c5be79dd423fcabahrens * or http://www.opensolaris.org/os/licensing.
fa9e4066f08beec538e775443c5be79dd423fcabahrens * See the License for the specific language governing permissions
fa9e4066f08beec538e775443c5be79dd423fcabahrens * and limitations under the License.
fa9e4066f08beec538e775443c5be79dd423fcabahrens *
fa9e4066f08beec538e775443c5be79dd423fcabahrens * When distributing Covered Code, include this CDDL HEADER in each
fa9e4066f08beec538e775443c5be79dd423fcabahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
fa9e4066f08beec538e775443c5be79dd423fcabahrens * If applicable, add the following below this CDDL HEADER, with the
fa9e4066f08beec538e775443c5be79dd423fcabahrens * fields enclosed by brackets "[]" replaced with your own identifying
fa9e4066f08beec538e775443c5be79dd423fcabahrens * information: Portions Copyright [yyyy] [name of copyright owner]
fa9e4066f08beec538e775443c5be79dd423fcabahrens *
fa9e4066f08beec538e775443c5be79dd423fcabahrens * CDDL HEADER END
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
c9431fa1e59a88c2f0abf611f25b97af964449e5ahl
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
c9431fa1e59a88c2f0abf611f25b97af964449e5ahl * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Use is subject to license terms.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens#ifndef _SYS_ZIO_COMPRESS_H
fa9e4066f08beec538e775443c5be79dd423fcabahrens#define _SYS_ZIO_COMPRESS_H
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens#pragma ident "%Z%%M% %I% %E% SMI"
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens#include <sys/zio.h>
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens#ifdef __cplusplus
fa9e4066f08beec538e775443c5be79dd423fcabahrensextern "C" {
fa9e4066f08beec538e775443c5be79dd423fcabahrens#endif
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Common signature for all zio compress/decompress functions.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrenstypedef size_t zio_compress_func_t(void *src, void *dst,
c9431fa1e59a88c2f0abf611f25b97af964449e5ahl size_t s_len, size_t d_len, int);
fa9e4066f08beec538e775443c5be79dd423fcabahrenstypedef int zio_decompress_func_t(void *src, void *dst,
c9431fa1e59a88c2f0abf611f25b97af964449e5ahl size_t s_len, size_t d_len, int);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Information about each compression function.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrenstypedef struct zio_compress_info {
c9431fa1e59a88c2f0abf611f25b97af964449e5ahl zio_compress_func_t *ci_compress; /* compression function */
c9431fa1e59a88c2f0abf611f25b97af964449e5ahl zio_decompress_func_t *ci_decompress; /* decompression function */
c9431fa1e59a88c2f0abf611f25b97af964449e5ahl int ci_level; /* level parameter */
c9431fa1e59a88c2f0abf611f25b97af964449e5ahl char *ci_name; /* algorithm name */
fa9e4066f08beec538e775443c5be79dd423fcabahrens} zio_compress_info_t;
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrensextern zio_compress_info_t zio_compress_table[ZIO_COMPRESS_FUNCTIONS];
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Compression routines.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
c9431fa1e59a88c2f0abf611f25b97af964449e5ahlextern size_t lzjb_compress(void *src, void *dst, size_t s_len, size_t d_len,
c9431fa1e59a88c2f0abf611f25b97af964449e5ahl int level);
c9431fa1e59a88c2f0abf611f25b97af964449e5ahlextern int lzjb_decompress(void *src, void *dst, size_t s_len, size_t d_len,
c9431fa1e59a88c2f0abf611f25b97af964449e5ahl int level);
c9431fa1e59a88c2f0abf611f25b97af964449e5ahlextern size_t gzip_compress(void *src, void *dst, size_t s_len, size_t d_len,
c9431fa1e59a88c2f0abf611f25b97af964449e5ahl int level);
c9431fa1e59a88c2f0abf611f25b97af964449e5ahlextern int gzip_decompress(void *src, void *dst, size_t s_len, size_t d_len,
c9431fa1e59a88c2f0abf611f25b97af964449e5ahl int level);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens/*
fa9e4066f08beec538e775443c5be79dd423fcabahrens * Compress and decompress data if necessary.
fa9e4066f08beec538e775443c5be79dd423fcabahrens */
fa9e4066f08beec538e775443c5be79dd423fcabahrensextern int zio_compress_data(int cpfunc, void *src, uint64_t srcsize,
fa9e4066f08beec538e775443c5be79dd423fcabahrens void **destp, uint64_t *destsizep, uint64_t *destbufsizep);
fa9e4066f08beec538e775443c5be79dd423fcabahrensextern int zio_decompress_data(int cpfunc, void *src, uint64_t srcsize,
fa9e4066f08beec538e775443c5be79dd423fcabahrens void *dest, uint64_t destsize);
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens#ifdef __cplusplus
fa9e4066f08beec538e775443c5be79dd423fcabahrens}
fa9e4066f08beec538e775443c5be79dd423fcabahrens#endif
fa9e4066f08beec538e775443c5be79dd423fcabahrens
fa9e4066f08beec538e775443c5be79dd423fcabahrens#endif /* _SYS_ZIO_COMPRESS_H */