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57 lines
2.2 KiB
C
57 lines
2.2 KiB
C
/*****************************************************************************
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Copyright (C) 2013, 2021, MariaDB Corporation.
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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 02110-1335 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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/******************************************************************//**
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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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/** Compress a page_compressed page before writing to a data file.
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@param[in] buf page to be compressed
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@param[out] out_buf compressed page
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@param[in] flags tablespace flags
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@param[in] block_size file system block size
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@param[in] encrypted whether the page will be subsequently encrypted
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@return actual length of compressed page
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@retval 0 if the page was not compressed */
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ulint fil_page_compress(
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const byte* buf,
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byte* out_buf,
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uint32_t flags,
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ulint block_size,
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bool encrypted)
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MY_ATTRIBUTE((nonnull, warn_unused_result));
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/** Decompress a page that may be subject to page_compressed compression.
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@param[in,out] tmp_buf temporary buffer (of innodb_page_size)
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@param[in,out] buf compressed page buffer
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@param[in] flags tablespace flags
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@return size of the compressed data
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@retval 0 if decompression failed
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@retval srv_page_size if the page was not compressed */
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ulint fil_page_decompress(byte *tmp_buf, byte *buf, uint32_t flags)
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MY_ATTRIBUTE((nonnull, warn_unused_result));
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#endif
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