Bundled Snappy compression codec (header-only, no external dependency). More...

#include <snappy.hpp>

Inheritance diagram for signet::forge::SnappyCodec:

Public Member Functions
expected< std::vector< uint8_t > >	compress (const uint8_t *data, size_t size) const override
	Snappy-compress the input data.

expected< std::vector< uint8_t > >	decompress (const uint8_t *data, size_t size, size_t uncompressed_size) const override
	Snappy-decompress the input data.

Metadata
Compression	codec_type () const override
	Return Compression::SNAPPY.

const char *	name () const override
	Return the codec name "snappy".

Public Member Functions inherited from signet::forge::CompressionCodec
virtual	~CompressionCodec ()=default
	Virtual destructor for safe polymorphic deletion.

Detailed Description

Bundled Snappy compression codec (header-only, no external dependency).

Implements both compression and decompression of the Snappy block format used by Apache Parquet. The compressor uses a single-pass greedy hash-chain matching strategy with a 16384-entry hash table. Worst-case expansion is approximately 1.004x the input size.

Register with the CodecRegistry via register_snappy_codec().

See also: CompressionCodec, register_snappy_codec()

Definition at line 241 of file snappy.hpp.

Member Function Documentation

◆ codec_type()

Compression signet::forge::SnappyCodec::codec_type ( ) const

inlineoverridevirtual

Return Compression::SNAPPY.

Implements signet::forge::CompressionCodec.

Definition at line 585 of file snappy.hpp.

◆ compress()

expected< std::vector< uint8_t > > signet::forge::SnappyCodec::compress	(	const uint8_t *	data,
		size_t	size
	)		const

inlineoverridevirtual

Snappy-compress the input data.

The output contains a varint-encoded uncompressed length preamble followed by a sequence of literal and copy elements.

Parameters

data	Pointer to the uncompressed input bytes.
size	Number of bytes to compress.

Returns: The Snappy-compressed byte buffer on success.

Implements signet::forge::CompressionCodec.

Definition at line 251 of file snappy.hpp.

◆ decompress()

expected< std::vector< uint8_t > > signet::forge::SnappyCodec::decompress	(	const uint8_t *	data,
		size_t	size,
		size_t	uncompressed_size
	)		const

inlineoverridevirtual

Snappy-decompress the input data.

The Snappy stream contains its own uncompressed-length preamble; this method verifies that it agrees with the Parquet-declared uncompressed_size. A mismatch is reported as ErrorCode::CORRUPT_PAGE.

Parameters

data	Pointer to the Snappy-compressed input bytes.
size	Number of compressed bytes.
uncompressed_size	Expected decompressed size (from the Parquet page header).

Returns: The decompressed byte buffer, or an Error on corruption/truncation.

Implements signet::forge::CompressionCodec.

Definition at line 360 of file snappy.hpp.

◆ name()

const char * signet::forge::SnappyCodec::name ( ) const

inlineoverridevirtual

Return the codec name "snappy".

Implements signet::forge::CompressionCodec.

Definition at line 590 of file snappy.hpp.

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

include/signet/compression/snappy.hpp

Public Member Functions

Detailed Description

Member Function Documentation

◆ codec_type()

◆ compress()

◆ decompress()

◆ name()