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package Filter::Decompress ;
# For usage see examples/filtdef
use Filter::Util::Call ;
use Compress::Zlib ;
use Carp ;
use strict ;
use warnings ;
our $VERSION = '1.02' ;
sub filter
{
my ($self) = @_ ;
my ($status, $err) ;
my ($inf) = $$self ;
if (($status = filter_read()) >0) {
($_, $err) = $inf->inflate($_) ;
return -1 unless $err == Z_OK or $err == Z_STREAM_END ;
}
$status ;
}
sub import
{
my ($self) = @_ ;
# Initialise an inflation stream.
my $x = inflateInit()
or croak "Internal Error inflateInit" ;
filter_add(\$x) ;
}
1 ;
__END__
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