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

       Dpkg::Compression - simple database of available	compression methods

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

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

	   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.

	   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.

	   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.

	   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").

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

   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

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

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


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