EVOLUTION-MANAGER

Edit File: fsp0pagecompress.ic

/*****************************************************************************

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/******************************************************************//**
@file include/fsp0pagecompress.ic
Implementation for helper functions for extracting/storing page
compression and atomic writes information to file space.

Created 11/12/2013 Jan Lindström jan.lindstrom@mariadb.com

***********************************************************************/

/********************************************************************//**
Determine the tablespace is page compression level from dict_table_t::flags.
@return	page compression level or 0 if not compressed*/
UNIV_INLINE
ulint
fsp_flags_get_page_compression_level(
/*=================================*/
	ulint	flags)	/*!< in: tablespace flags */
{
	return(FSP_FLAGS_GET_PAGE_COMPRESSION_LEVEL(flags));
}

/*******************************************************************//**
Find out wheather the page is page compressed
@return	true if page is page compressed, false if not */
UNIV_INLINE
bool
fil_page_is_compressed(
/*===================*/
	const byte*	buf)	/*!< in: page */
{
	return(mach_read_from_2(buf+FIL_PAGE_TYPE) == FIL_PAGE_PAGE_COMPRESSED);
}

/*******************************************************************//**
Find out wheather the page is page compressed
@return	true if page is page compressed, false if not */
UNIV_INLINE
bool
fil_page_is_compressed_encrypted(
/*=============================*/
	const byte*	buf)	/*!< in: page */
{
	return(mach_read_from_2(buf+FIL_PAGE_TYPE) == FIL_PAGE_PAGE_COMPRESSED_ENCRYPTED);
}