PerlIO::mmap(3pm) Perl Programmers Reference Guide PerlIO::mmap(3pm)NAME
PerlIO::mmap - Memory mapped IO
SYNOPSIS
open my $fh, '<:mmap', $filename;
DESCRIPTION
This layer does "read" and "write" operations by mmap()ing the file if possible, but falls back to the default behavior if not.
IMPLEMENTATION NOTE
"PerlIO::mmap" only exists to use XSLoader to load C code that provides support for using memory mapped IO. One does not need to explicitly
"use PerlIO::mmap;".
perl v5.16.2 2012-10-25 PerlIO::mmap(3pm)
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PerlIO::via::Bzip2(3) User Contributed Perl Documentation PerlIO::via::Bzip2(3)NAME
PerlIO::via::Bzip2 - PerlIO layer for Bzip2 (de)compression
SYNOPSIS
use PerlIO::via::Bzip2;
# or
use PerlIO::via::Bzip2 level => 9; # Maximum compression
# Read a bzip2 compressed file from disk.
open(my $fh, "<:via(Bzip2)", "compressed_file");
my $uncompressed_data = <$fh>;
# Compress data on-the-fly to a bzip2 compressed file on disk.
open(my $fh, ">:via(Bzip2)", "compressed_file");
print {$fh} $uncompressed_data;
# Set compression level
PerlIO::via::Bzip2->level(5);
open(my $fh, ">:via(Bzip2)", "compressed_file");
print {$fh} $uncompressed_data;
DESCRIPTION
This module implements a PerlIO layer which will let you handle bzip2 compressed files transparently.
Class Methods
level([$level])
level sets or returns the compression level of the bzip2 library. It ranges from 1 (least compression, most efficient memory use) to 9
(best compression, most memory usage).
This parameter can also be set during using library import, using "use PerlIO::via::Bzip2 level => $level".
BUGS
Using binmode() on an opened file for compression will pop (remove) the layer.
PREREQUISITES
This module requires Compress::Bzip2 version 1.03.
SEE ALSO
PerlIO::via, Compress::Bzip2
AUTHOR
Arjen Laarhoven, <arjen@cpan.org>
COPYRIGHT AND LICENSE
Copyright (C) 2005 by Arjen Laarhoven
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
perl v5.16.2 2005-03-04 PerlIO::via::Bzip2(3)
Manufacturer Links
General Information
Home Page: IBM United States
Documentation/Information: IBM System p - UNIX servers: Support and services
pSeries and AIX Information Center
Developerworks AIX Wiki: AIX Wiki
AIX for System Administrators
In-depth information from IBM:
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