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lib/IO/Uncompress/AnyInflate.pm  view on Meta::CPAN

{
    my $obj = IO::Compress::Base::Common::createSelfTiedObject(undef, \$AnyInflateError);
    return $obj->_inf(@_) ;
}

sub getExtraParams
{
    return ( 'rawinflate' => [Parse_boolean,  0] ) ;
}

sub ckParams
{
    my $self = shift ;
    my $got = shift ;

    # any always needs both crc32 and adler32
    $got->setValue('crc32' => 1);
    $got->setValue('adler32' => 1);

    return 1;
}

sub mkUncomp
{
    my $self = shift ;
    my $got = shift ;

    my ($obj, $errstr, $errno) = IO::Uncompress::Adapter::Inflate::mkUncompObject();

    return $self->saveErrorString(undef, $errstr, $errno)
        if ! defined $obj;

    *$self->{Uncomp} = $obj;

     my @possible = qw( Inflate Gunzip Unzip );
     unshift @possible, 'RawInflate'
        if 1 || $got->getValue('rawinflate');

     my $magic = $self->ckMagic( @possible );

     if ($magic) {
        *$self->{Info} = $self->readHeader($magic)
            or return undef ;

        return 1;
     }

     return 0 ;
}



sub ckMagic
{
    my $self = shift;
    my @names = @_ ;

    my $keep = ref $self ;
    for my $class ( map { "IO::Uncompress::$_" } @names)
    {
        bless $self => $class;
        my $magic = $self->ckMagic();

        if ($magic)
        {
            #bless $self => $class;
            return $magic ;
        }

        $self->pushBack(*$self->{HeaderPending})  ;
        *$self->{HeaderPending} = ''  ;
    }

    bless $self => $keep;
    return undef;
}

1 ;

__END__


=head1 NAME

IO::Uncompress::AnyInflate - Uncompress zlib-based (zip, gzip) file/buffer

=head1 SYNOPSIS

    use IO::Uncompress::AnyInflate qw(anyinflate $AnyInflateError) ;

    my $status = anyinflate $input => $output [,OPTS]
        or die "anyinflate failed: $AnyInflateError\n";

    my $z = IO::Uncompress::AnyInflate->new( $input [OPTS] )
        or die "anyinflate failed: $AnyInflateError\n";

    $status = $z->read($buffer)
    $status = $z->read($buffer, $length)
    $status = $z->read($buffer, $length, $offset)
    $line = $z->getline()
    $char = $z->getc()
    $char = $z->ungetc()
    $char = $z->opened()

    $status = $z->inflateSync()

    $data = $z->trailingData()
    $status = $z->nextStream()
    $data = $z->getHeaderInfo()
    $z->tell()
    $z->seek($position, $whence)
    $z->binmode()
    $z->fileno()
    $z->eof()
    $z->close()

    $AnyInflateError ;

    # IO::File mode

    <$z>
    read($z, $buffer);
    read($z, $buffer, $length);
    read($z, $buffer, $length, $offset);
    tell($z)
    seek($z, $position, $whence)