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Dpkg::Compression(3)		 libdpkg-perl		  Dpkg::Compression(3)

NAME
       Dpkg::Compression - simple database of available	compression methods

DESCRIPTION
       This modules provides a few public functions and	a public regex to
       interact	with the set of	supported compression methods.

FUNCTIONS
       @list = compression_get_list()
	   Returns a list of supported compression methods (sorted
	   alphabetically).

       compression_is_supported($comp)
	   Returns a boolean indicating	whether	the give compression method is
	   known and supported.

       compression_get_property($comp, $property)
	   Returns the requested property of the compression method. Returns
	   undef if either the property	or the compression method doesn't
	   exist. Valid	properties currently include "file_ext"	for the	file
	   extension, "default_level" for the default compression level,
	   "comp_prog" for the name of the compression program and
	   "decomp_prog" for the name of the decompression program.

       compression_guess_from_filename($filename)
	   Returns the compression method that is likely used on the indicated
	   filename based on its file extension.

       $regex =	compression_get_file_extension_regex()
	   Returns a regex that	matches	a file extension of a file compressed
	   with	one of the supported compression methods.

       $comp = compression_get_default()
	   Return the default compression method. It is	"xz" unless
	   "compression_set_default" has been used to change it.

       compression_set_default($comp)
	   Change the default compression method. Errors out if	the given
	   compression method is not supported.

       $level =	compression_get_default_level()
	   Return the default compression level	used when compressing data.
	   It's	"9" for	"gzip" and "bzip2", "6"	for "xz" and "lzma", unless
	   "compression_set_default_level" has been used to change it.

       compression_set_default_level($level)
	   Change the default compression level. Passing undef as the level
	   will	reset it to the	compressor specific default, otherwise errors
	   out if the level is not valid (see "compression_is_valid_level").

       compression_is_valid_level($level)
	   Returns a boolean indicating	whether	$level is a valid compression
	   level (it must be either a number between 1 and 9 or	"fast" or
	   "best")

CHANGES
   Version 1.02	(dpkg 1.17.2)
       New function: compression_get_file_extension_regex()

       Deprecated variables: $default_compression, $default_compression_level
       and $compression_re_file_ext

   Version 1.01	(dpkg 1.16.1)
       Default compression level is not	global any more, it is per compressor
       type.

   Version 1.00	(dpkg 1.15.6)
       Mark the	module as public.

1.18.24				  2017-04-13		  Dpkg::Compression(3)

NAME | DESCRIPTION | FUNCTIONS | CHANGES

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