1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 
  22 /*
  23  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26 /*
  27  * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
  28  */
  29 
  30 #ifndef _SYS_ZIO_COMPRESS_H
  31 #define _SYS_ZIO_COMPRESS_H
  32 
  33 #include <sys/zio.h>
  34 
  35 #ifdef  __cplusplus
  36 extern "C" {
  37 #endif
  38 
  39 /*
  40  * Common signature for all zio compress/decompress functions.
  41  */
  42 typedef size_t zio_compress_func_t(void *src, void *dst,
  43     size_t s_len, size_t d_len, int);
  44 typedef int zio_decompress_func_t(void *src, void *dst,
  45     size_t s_len, size_t d_len, int);
  46 
  47 /*
  48  * Information about each compression function.
  49  */
  50 typedef struct zio_compress_info {
  51         zio_compress_func_t     *ci_compress;   /* compression function */
  52         zio_decompress_func_t   *ci_decompress; /* decompression function */
  53         int                     ci_level;       /* level parameter */
  54         char                    *ci_name;       /* algorithm name */
  55 } zio_compress_info_t;
  56 
  57 extern zio_compress_info_t zio_compress_table[ZIO_COMPRESS_FUNCTIONS];
  58 
  59 /*
  60  * Compression routines.
  61  */
  62 extern size_t lzjb_compress(void *src, void *dst, size_t s_len, size_t d_len,
  63     int level);
  64 extern int lzjb_decompress(void *src, void *dst, size_t s_len, size_t d_len,
  65     int level);
  66 extern size_t gzip_compress(void *src, void *dst, size_t s_len, size_t d_len,
  67     int level);
  68 extern int gzip_decompress(void *src, void *dst, size_t s_len, size_t d_len,
  69     int level);
  70 extern size_t zle_compress(void *src, void *dst, size_t s_len, size_t d_len,
  71     int level);
  72 extern int zle_decompress(void *src, void *dst, size_t s_len, size_t d_len,
  73     int level);
  74 extern size_t lz4_compress(void *src, void *dst, size_t s_len, size_t d_len,
  75     int level);
  76 extern int lz4_decompress(void *src, void *dst, size_t s_len, size_t d_len,
  77     int level);
  78 
  79 /*
  80  * Compress and decompress data if necessary.
  81  */
  82 extern size_t zio_compress_data(enum zio_compress c, void *src, void *dst,
  83     size_t s_len);
  84 extern int zio_decompress_data(enum zio_compress c, void *src, void *dst,
  85     size_t s_len, size_t d_len);
  86 
  87 #ifdef  __cplusplus
  88 }
  89 #endif
  90 
  91 #endif  /* _SYS_ZIO_COMPRESS_H */