1 files changed, 57 insertions, 0 deletions
diff --git a/storage/innobase/include/fil0pagecompress.h b/storage/innobase/include/fil0pagecompress.h
new file mode 100644
index 00000000..2927da3c
--- /dev/null
+++ b/storage/innobase/include/fil0pagecompress.h
@@ -0,0 +1,57 @@
+/*****************************************************************************
+
+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