libarchive-zip-perl 1.59-1+deb9u1 / usr / share / doc / libarchive-zip-perl / examples / calcSizes.pl

#!/usr/bin/perl
# Example of how to compute compressed sizes
# $Revision: 1.2 $
use strict;
use Archive::Zip qw(:ERROR_CODES);
use File::Spec;
my $zip             = Archive::Zip->new();
my $blackHoleDevice = File::Spec->devnull();

$zip->addFile($_) foreach (<*.pl>);

# Write and throw the data away.
# after members are written, the writeOffset will be set
# to the compressed size.
$zip->writeToFileNamed($blackHoleDevice);

my $totalSize           = 0;
my $totalCompressedSize = 0;
foreach my $member ($zip->members()) {
    $totalSize           += $member->uncompressedSize;
    $totalCompressedSize += $member->_writeOffset;
    print "Member ", $member->externalFileName,
      " size=",         $member->uncompressedSize,
      ", writeOffset=", $member->_writeOffset,
      ", compressed=",  $member->compressedSize,
      "\n";
}

print "Total Size=", $totalSize, ", total compressed=", $totalCompressedSize,
  "\n";

$zip->writeToFileNamed('test.zip');