Please could someone help solve a problem I have using the Compress::Zlib module? (apologies for length of post)
Background:
OS: AIX
I am trying to unzip a .gz file that is too large for my version of gzip (117086673 bytes). Gzip just returns that the file is 'too large', so I thought Perl could help out.
I tried the following code (cribbed from CPAN): 
            
my $buffer;
my $gz = gzopen ("$input_dir/$file", 'rb') 
    || die "Can't open gz $file\n"; 
while ($gz -> gzread ($buffer) > 0) {  
    syswrite DATAFILE, $buffer, 4096;             
}
$gz -> gzclose; 
close DATAFILE;

[download]
The result was an uncompressed, but uncomplete output file. I thought maybe the buffer wasn't flushing at the end so I also tried (courtesy of CPAN): 
open (GZIPFILE, "$input_dir/$file") 
    || warn "Can't open zip input file: $file: $!";
binmode GZIPFILE;
open (DATAFILE, ">>$input_dir/$dat_file")  
    || warn "Can't open uncompressed data file: $dat_file: $!";
my $deflator = deflateInit() or die "Cannot create a deflation stream\
+n" ;
my ($output, $status);
while (<GZIPFILE>) {
    ($output, $status) = $deflator->deflate($_) ;
    $status == Z_OK or die "deflation failed\n" ; 
    print (DATAFILE $output) ;
}
($output, $status) = $deflator->flush() ; 
$status == Z_OK or die "deflation failed\n" ; 
print (DATAFILE $output) ;

[download]
The result was again a partially uncompressed file. Is there a maximum file size that Zlib can handle? If there is, is it configurable? If not, does anybody know what I am doing wrong?
Any other suggestions?
Thanks,
Erm.

In reply to Zlib is stopping me leaving work early and going to the pub... by erm

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