IO Compression Utilities
[Utilities]

Collaboration diagram for IO Compression Utilities:

Functions
int	utr_io_decompress_file (const char *Work_dir, const char *Filename, char *Decompressed_filename)
	This functions tries to find compressed file and decompress it, in given directory.
int	utr_io_compress_file (const char *Work_dir, const char *Filename)
	This functions tires to find given file and compress it, saving compressed file under the same name, but with ".zip" postfix (e.g. "field0.dmp" will become "field0.dmp.zip").

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Detailed Description

The IO Compression Utilities provides automatic ZIP compression of all dumped mesh and field files. General assumptions:

• compression and decompression is applied for all I/O operations executed with usage of utilities
• decompression seeks for given filename with or without ".zip" ending (e.g. if in problem definition file a "mesh.dat" filename is given, a "mesh.dat.zip" file is accepted as correct data file and decompressed to "mesh.dat")
• if decompressed file is found with matching name, it will be selected for read
• decompression temporarily creates files in working directory
• dumped files are compressed right after file write is complete
• original (not-compressed) files are auto-deleted at program exit
• if program fails to exit correctly both compressed and uncompressed file can be found in work directory
• compressed files are about 15-30% of the size of not compressed files
• compression is recommended for files > 1MB, and strongly recommended for files > 10MB

The IO Compression Utilities are enabled by default.

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

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Function Documentation

int utr_io_compress_file	(	const char *	Work_dir,
		const char *	Filename
	)

This functions tires to find given file and compress it, saving compressed file under the same name, but with ".zip" postfix (e.g. "field0.dmp" will become "field0.dmp.zip").

Parameters:

	Work_dir	const char* Working directory - in this path given Filename will be searched.
	Filename	const char* file to compress

Returns:

int

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int utr_io_decompress_file	(	const char *	Work_dir,
		const char *	Filename,
		char *	Decompressed_filename
	)

This functions tries to find compressed file and decompress it, in given directory.

Parameters:

	Work_dir	const char* Working directory - in this path given Filename will be searched.
	Filename	const char* filename with or without ".zip" ending to decompress.
	Decompressed_filename	OUT: filename to proceed with, after decompression.

Returns:

int

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