NAME

Parse::Binary - Unpack binary data structures into object hierarchies

VERSION

This document describes version 0.10 of Parse::Binary, released June 7, 2006.

SYNOPSIS

# This class represents a Win32 .ico file:

    package IconFile;
    use base 'Parse::Binary';
    use constant FORMAT => (
	Magic		=> 'a2',
	Type		=> 'v',
	Count		=> 'v',
	'Icon'		=> [ 'a16', '{$Count}', 1 ],
	Data		=> 'a*',
    );

# An individual icon resource:

    package Icon;
    use base 'Parse::Binary';
    use constant FORMAT => (
	Width		=> 'C',
	Height		=> 'C',
	ColorCount	=> 'C',
	Reserved	=> 'C',
	Planes		=> 'v',
	BitCount	=> 'v',
	ImageSize	=> 'V',
	ImageOffset	=> 'v',
    );
    sub Data {
	my ($self) = @_;
	return $self->parent->substr($self->ImageOffset, $self->ImageSize);
    }

# Simple .ico file dumper that uses them:

    use IconFile;
    my $icon_file = IconFile->new('input.ico');
    foreach my $icon ($icon_file->members) {
	print "Dimension: ", $icon->Width, "x", $icon->Height, $/;
	print "Colors: ", 2 ** $icon->BitCount, $/;
	print "Image Size: ", $icon->ImageSize, " bytes", $/;
	print "Actual Size: ", length($icon->Data), " bytes", $/, $/;
    }
    $icon_file->write('output.ico'); # save as another .ico file

DESCRIPTION

This module makes parsing binary data structures much easier, by serving as a base class for classes that represents the binary data, which may contain objects of other classes to represent parts of itself.

Documentation is unfortunately a bit lacking at this moment. Please read the tests and source code of Parse::AFP and Win32::Exe for examples of using this module.

AUTHORS

Audrey Tang <cpan@audreyt.org>

COPYRIGHT

Copyright 2004, 2006 by Audrey Tang <cpan@audreyt.org>.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

See http://www.perl.com/perl/misc/Artistic.html