use Compress::Zlib;
use strict;
foreach my $f ( grep { -f } @ARGV ){
    my ($buffer,$gz);
    if ($f=~/gz$/){
	(my $rtf = $f) =~ s/(.)gz$//;
	open OOT, ">$rtf" or die "$0:$rtf:$!";    
	binmode OOT;    
	$gz = gzopen($f, "rb") or die "$0:$gzerrno:$!";
	print OOT $buffer while $gz->gzread($buffer) > 0;
	die "$f: $gzerrno:$!" if $gzerrno != Z_STREAM_END;
	$gz->gzclose();
	close(OOT);
    } else { # gzip our file
	open COOT, "$f" or die "$0:$f:$!";
	binmode COOT;
	$gz = gzopen("$f.gz", "wb") 
	    or die "$0:$gzerrno:$!";
	while (<COOT>){
	    $gz->gzwrite($_) or die "$f.gz,$gzerrno:$!";
	}
	$gz->gzclose;
    }
}