mysql::binlog::event::compression::None_comp Class Reference

Compressor subclass that only copies input to output without compressing it. More...

#include <none_comp.h>

Inheritance diagram for mysql::binlog::event::compression::None_comp:

Public Types
using	Char_t = Managed_buffer_sequence_t::Char_t
using	Managed_buffer_sequence_t = mysql::containers::buffers::Managed_buffer_sequence<>
using	Size_t = Managed_buffer_sequence_t::Size_t
Public Types inherited from mysql::binlog::event::compression::Compressor
using	Managed_buffer_sequence_t = mysql::containers::buffers::Managed_buffer_sequence<>
using	Char_t = Managed_buffer_sequence_t::Char_t
using	Size_t = Managed_buffer_sequence_t::Size_t
using	Grow_constraint_t = mysql::containers::buffers::Grow_constraint

Static Public Attributes
static constexpr type	type_code = NONE
Static Public Attributes inherited from mysql::binlog::event::compression::Compressor
static constexpr Size_t	pledged_input_size_unset

Private Member Functions
type	do_get_type_code () const override
void	do_reset () override
	Implement reset. More...
void	do_feed (const Char_t *input_data, Size_t input_size) override
	Implement feed. More...
Compress_status	do_compress (Managed_buffer_sequence_t &out) override
	Implement compress. More...
Compress_status	do_finish (Managed_buffer_sequence_t &out) override
	Implement finish. More...

Private Attributes
const Char_t *	m_input_data {nullptr}
	Data previously provided to do_feed. More...
Size_t	m_input_size {0}
	Size data previously provided to do_feed. More...

Additional Inherited Members
Public Member Functions inherited from mysql::binlog::event::compression::Compressor
	Compressor ()=default
	Compressor (const Compressor &other)=delete
	Compressor (Compressor &&other)=delete
Compressor &	operator= (const Compressor &other)=delete
Compressor &	operator= (Compressor &&other)=delete
virtual	~Compressor ()=default
type	get_type_code () const
void	reset ()
	Reset the frame. More...
template<class Input_char_t >
void	feed (const Input_char_t *input_data, Size_t input_size)
	Submit data to be compressed. More...
Compress_status	compress (Managed_buffer_sequence_t &out)
	Consume all input previously given in the feed function. More...
Compress_status	finish (Managed_buffer_sequence_t &out)
	Consume all input, produce all output, and end the frame. More...
Grow_constraint_t	get_grow_constraint_hint () const
	Return a Grow_constraint that may be used with the Managed_buffer_sequence storing the output, in order to optimize memory usage for a particular compression algorithm. More...
void	set_pledged_input_size (Size_t size)
	Declare that the input size will be exactly as given. More...
Size_t	get_pledged_input_size () const
	Return the size previously provided to set_pledged_input_size, or pledged_input_size_unset if no pledged size has been set. More...

Detailed Description

Compressor subclass that only copies input to output without compressing it.

Member Typedef Documentation

Char_t

using mysql::binlog::event::compression::Compressor::Char_t = Managed_buffer_sequence_t::Char_t

Managed_buffer_sequence_t

using mysql::binlog::event::compression::Compressor::Managed_buffer_sequence_t = mysql::containers::buffers::Managed_buffer_sequence<>

Size_t

using mysql::binlog::event::compression::Compressor::Size_t = Managed_buffer_sequence_t::Size_t

Member Function Documentation

do_compress()

Compress_status mysql::binlog::event::compression::None_comp::do_compress ( Managed_buffer_sequence_t &  out )

overrideprivatevirtual

Implement compress.

This differs from compress in that it does not have to reset the frame when returning out_of_memory; the caller does that.

For None_comp, this is guaranteed to produce all output on success.

Implements mysql::binlog::event::compression::Compressor.

do_feed()

void mysql::binlog::event::compression::None_comp::do_feed ( const Char_t *  input_data, Size_t  input_size  )

overrideprivatevirtual

Implement feed.

This differs from feed in that it does not have to reset the frame when returning out_of_memory; the caller does that.

Implements mysql::binlog::event::compression::Compressor.

do_finish()

Compress_status mysql::binlog::event::compression::None_comp::do_finish ( Managed_buffer_sequence_t &  out )

overrideprivatevirtual

Implement finish.

This differs from finish in that it does not have to reset the frame when returning out_of_memory; the caller does that.

Implementations may assume that compress has been called, since finish does that.

For None_comp, this is equivalent to compress.

Implements mysql::binlog::event::compression::Compressor.

do_get_type_code()

type mysql::binlog::event::compression::None_comp::do_get_type_code ( ) const

overrideprivatevirtual

Returns

NONE

Implements mysql::binlog::event::compression::Compressor.

do_reset()

void mysql::binlog::event::compression::None_comp::do_reset ( )

overrideprivatevirtual

Implement reset.

No-op for this class.

Implements mysql::binlog::event::compression::Compressor.

Member Data Documentation

m_input_data

const Char_t* mysql::binlog::event::compression::None_comp::m_input_data {nullptr}

private

Data previously provided to do_feed.

m_input_size

Size_t mysql::binlog::event::compression::None_comp::m_input_size {0}

private

Size data previously provided to do_feed.

type_code

constexpr type mysql::binlog::event::compression::None_comp::type_code = NONE

staticconstexpr

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The documentation for this class was generated from the following files:

• libs/mysql/binlog/event/compression/none_comp.h
• libs/mysql/binlog/event/compression/none_comp.cpp