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69 lines
2.6 KiB
C
69 lines
2.6 KiB
C
/*****************************************************************************
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Copyright (C) 2013, 2017 MariaDB Corporation. All Rights Reserved.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*****************************************************************************/
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#ifndef fil0pagecompress_h
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#define fil0pagecompress_h
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#include "fsp0fsp.h"
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#include "fsp0pagecompress.h"
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/******************************************************************//**
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@file include/fil0pagecompress.h
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Helper functions for extracting/storing page compression and
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atomic writes information to table space.
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Created 11/12/2013 Jan Lindström jan.lindstrom@skysql.com
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***********************************************************************/
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/****************************************************************//**
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For page compressed pages compress the page before actual write
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operation.
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@return compressed page to be written*/
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UNIV_INTERN
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byte*
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fil_compress_page(
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/*==============*/
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fil_space_t* space, /*!< in,out: tablespace (NULL during IMPORT) */
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byte* buf, /*!< in: buffer from which to write; in aio
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this must be appropriately aligned */
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byte* out_buf, /*!< out: compressed buffer */
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ulint len, /*!< in: length of input buffer.*/
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ulint level, /* in: compression level */
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ulint block_size, /*!< in: block size */
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bool encrypted, /*!< in: is page also encrypted */
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ulint* out_len); /*!< out: actual length of compressed
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page */
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/****************************************************************//**
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For page compressed pages decompress the page after actual read
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operation. */
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UNIV_INTERN
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void
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fil_decompress_page(
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/*================*/
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byte* page_buf, /*!< in: preallocated buffer or NULL */
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byte* buf, /*!< out: buffer from which to read; in aio
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this must be appropriately aligned */
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ulong len, /*!< in: length of output buffer.*/
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ulint* write_size, /*!< in/out: Actual payload size of
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the compressed data. */
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bool return_error=false);
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/*!< in: true if only an error should
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be produced when decompression fails.
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By default this parameter is false. */
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#endif
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