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/*****************************************************************************
Copyright (C) 2013, 2021, MariaDB Corporation.
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA
*****************************************************************************/
#ifndef fil0pagecompress_h
#define fil0pagecompress_h
#include "fsp0fsp.h"
/******************************************************************//**
@file include/fil0pagecompress.h
Helper functions for extracting/storing page compression and
atomic writes information to table space.
Created 11/12/2013 Jan Lindström jan.lindstrom@skysql.com
***********************************************************************/
/** Compress a page_compressed page before writing to a data file.
@param[in] buf page to be compressed
@param[out] out_buf compressed page
@param[in] flags tablespace flags
@param[in] block_size file system block size
@param[in] encrypted whether the page will be subsequently encrypted
@return actual length of compressed page
@retval 0 if the page was not compressed */
ulint fil_page_compress(
const byte* buf,
byte* out_buf,
uint32_t flags,
ulint block_size,
bool encrypted)
MY_ATTRIBUTE((nonnull, warn_unused_result));
/** Decompress a page that may be subject to page_compressed compression.
@param[in,out] tmp_buf temporary buffer (of innodb_page_size)
@param[in,out] buf compressed page buffer
@param[in] flags tablespace flags
@return size of the compressed data
@retval 0 if decompression failed
@retval srv_page_size if the page was not compressed */
ulint fil_page_decompress(byte *tmp_buf, byte *buf, uint32_t flags)
MY_ATTRIBUTE((nonnull, warn_unused_result));
#endif
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