Detailed Description

Compression using the "zip" algorithm and from/to gzip (gz) files.

mrpt_base_grp

Functions
void	compress (void *inData, size_t inDataSize, std::vector< unsigned char > &outData)
	Compress an array of bytes into another one. More...

void	compress (const std::vector< unsigned char > &inData, std::vector< unsigned char > &outData)
	Compress an array of bytes into another one. More...

void	compress (void *inData, size_t inDataSize, mrpt::utils::CStream &out)
	Compress an array of bytes and write the result into a stream. More...

void	compress (const std::vector< unsigned char > &inData, mrpt::utils::CStream &out)
	Compress an array of bytes and write the result into a stream. More...

void	decompress (void *inData, size_t inDataSize, std::vector< unsigned char > &outData, size_t outDataEstimatedSize)
	Decompress an array of bytes into another one. More...

void	decompress (void inData, size_t inDataSize, void outData, size_t outDataBufferSize, size_t &outDataActualSize)
	Decompress an array of bytes into another one. More...

void	decompress (mrpt::utils::CStream &inStream, size_t inDataSize, void *outData, size_t outDataBufferSize, size_t &outDataActualSize)
	Decompress an array of bytes into another one. More...

bool	decompress_gz_file (const std::string &file_path, vector_byte &buffer)
	Decompress a gzip file (xxxx.gz) into a memory buffer. More...

bool	compress_gz_file (const std::string &file_path, const vector_byte &buffer, const int compress_level=9)
	Compress a memory buffer into a gzip file (xxxx.gz). More...

bool	compress_gz_data_block (const vector_byte &in_data, vector_byte &out_gz_data, const int compress_level=9)
	Compress a memory buffer in gz-file format and return it as a block a memory. More...

bool	decompress_gz_data_block (const vector_byte &in_gz_data, vector_byte &out_data)
	Decompress an array of bytes storing a gz-compressed stream of data into a memory buffer. More...

Function Documentation

◆ compress() [1/4]

void mrpt::compress::zip::compress	(	void *	inData,
		size_t	inDataSize,
		std::vector< unsigned char > &	outData
	)

Compress an array of bytes into another one.

Definition at line 36 of file zip.cpp.

References ASSERT_, MRPT_END_WITH_CLEAN_UP, MRPT_START, and Z_OK.

Referenced by compress(), and mrpt::utils::CImage::writeToStream().

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◆ compress() [2/4]

void mrpt::compress::zip::compress	(	const std::vector< unsigned char > &	inData,
		std::vector< unsigned char > &	outData
	)

Compress an array of bytes into another one.

Definition at line 59 of file zip.cpp.

References ASSERT_, compress(), MRPT_END_WITH_CLEAN_UP, MRPT_START, and Z_OK.

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◆ compress() [3/4]

void mrpt::compress::zip::compress	(	void *	inData,
		size_t	inDataSize,
		mrpt::utils::CStream &	out
	)

Compress an array of bytes and write the result into a stream.

Definition at line 82 of file zip.cpp.

References ASSERT_, compress(), MRPT_END_WITH_CLEAN_UP, MRPT_START, mrpt::utils::CStream::WriteBuffer(), and Z_OK.

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◆ compress() [4/4]

void mrpt::compress::zip::compress	(	const std::vector< unsigned char > &	inData,
		mrpt::utils::CStream &	out
	)

Compress an array of bytes and write the result into a stream.

Definition at line 110 of file zip.cpp.

References ASSERT_, compress(), MRPT_END_WITH_CLEAN_UP, MRPT_START, mrpt::utils::CStream::WriteBuffer(), and Z_OK.

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◆ compress_gz_data_block()

bool mrpt::compress::zip::compress_gz_data_block	(	const vector_byte &	in_data,
		vector_byte &	out_gz_data,
		const int	compress_level = `9`
	)

Compress a memory buffer in gz-file format and return it as a block a memory.

compress_level: 0=no compression, 1=best speed, 9=maximum

Returns: true on success, false on error.

Note: If in_data is empty, an empty buffer is returned in out_gz_data and no error is reported.

See also: compress_gz_file, de

Definition at line 272 of file zip.cpp.

References mrpt::format(), mrpt::utils::CFileInputStream::getTotalBytesCount(), mrpt::system::now(), mrpt::utils::CFileInputStream::open(), mrpt::utils::CStream::ReadBuffer(), and THROW_EXCEPTION.

Referenced by TEST().

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◆ compress_gz_file()

bool mrpt::compress::zip::compress_gz_file	(	const std::string &	file_path,
		const vector_byte &	buffer,
		const int	compress_level = `9`
	)

Compress a memory buffer into a gzip file (xxxx.gz).

compress_level: 0=no compression, 1=best speed, 9=maximum

Returns: true on success, false on error.

See also: decompress_gz_file, compress_gz_data_block

Definition at line 239 of file zip.cpp.

References CFileGZOutputStream, and THROW_EXCEPTION.

◆ decompress() [1/3]

void mrpt::compress::zip::decompress	(	void *	inData,
		size_t	inDataSize,
		std::vector< unsigned char > &	outData,
		size_t	outDataEstimatedSize
	)

Decompress an array of bytes into another one.

Exceptions

std::exception If the apriori estimated decompressed size is not enought

Definition at line 137 of file zip.cpp.

References ASSERT_, MRPT_END_WITH_CLEAN_UP, MRPT_START, and Z_OK.

Referenced by mrpt::utils::CImage::readFromStream().

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◆ decompress() [2/3]

void mrpt::compress::zip::decompress	(	void *	inData,
		size_t	inDataSize,
		void *	outData,
		size_t	outDataBufferSize,
		size_t &	outDataActualSize
	)

Decompress an array of bytes into another one.

Exceptions

std::exception If the apriori estimated decompressed size is not enought

Definition at line 161 of file zip.cpp.

References ASSERT_, MRPT_END_WITH_CLEAN_UP, MRPT_START, and Z_OK.

◆ decompress() [3/3]

void mrpt::compress::zip::decompress	(	mrpt::utils::CStream &	inStream,
		size_t	inDataSize,
		void *	outData,
		size_t	outDataBufferSize,
		size_t &	outDataActualSize
	)