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/*****************************************************************************
Copyright (C) 2013, 2017 MariaDB Corporation. All Rights Reserved.
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 02110-1301 USA
*****************************************************************************/
#ifndef fil0pagecompress_h
#define fil0pagecompress_h
#include "fsp0fsp.h"
#include "fsp0pagecompress.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
***********************************************************************/
/****************************************************************//**
For page compressed pages compress the page before actual write
operation.
@return compressed page to be written*/
UNIV_INTERN
byte*
fil_compress_page(
/*==============*/
fil_space_t* space, /*!< in,out: tablespace (NULL during IMPORT) */
byte* buf, /*!< in: buffer from which to write; in aio
this must be appropriately aligned */
byte* out_buf, /*!< out: compressed buffer */
ulint len, /*!< in: length of input buffer.*/
ulint level, /* in: compression level */
ulint block_size, /*!< in: block size */
bool encrypted, /*!< in: is page also encrypted */
ulint* out_len); /*!< out: actual length of compressed
page */
/****************************************************************//**
For page compressed pages decompress the page after actual read
operation. */
UNIV_INTERN
void
fil_decompress_page(
/*================*/
byte* page_buf, /*!< in: preallocated buffer or NULL */
byte* buf, /*!< out: buffer from which to read; in aio
this must be appropriately aligned */
ulong len, /*!< in: length of output buffer.*/
ulint* write_size, /*!< in/out: Actual payload size of
the compressed data. */
bool return_error=false);
/*!< in: true if only an error should
be produced when decompression fails.
By default this parameter is false. */
#endif
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