package Data::ParseBinary::Stream::Reader;
use strict;
use warnings;
sub _readBitsForByteStream {
my ($self, $bitcount) = @_;
my $count = int($bitcount / 8) + ($bitcount % 8 ? 1 : 0);
my $data = $self->ReadBytes($count);
my $fullbits = unpack "B*", $data;
my $string = substr($fullbits, -$bitcount);
return $string;
}
sub _readBytesForBitStream {
my ($self, $count) = @_;
my $bitData = $self->ReadBits($count * 8);
my $data = pack "B*", $bitData;
return $data;
}
sub isBitStream { die "unimplemented" }
sub ReadBytes { die "unimplemented" }
sub ReadBits { die "unimplemented" }
sub seek { die "unimplemented" }
sub tell { die "unimplemented" }
our %_streamTypes;
sub _registerStreamType {
my ($class, $typeName) = @_;
$_streamTypes{$typeName} = $class;
}
sub CreateStreamReader {
my @params = @_;
if (@params == 0) {
die "CreateStreamReader: mush have a parameter";
}
if (@params == 1) {
my $source = $params[0];
if (not defined $source or not ref $source) {
# some value (string?). let's feed it to StringStreamWriter
return $_streamTypes{String}->new($source);
}
if (UNIVERSAL::isa($source, "Data::ParseBinary::Stream::Reader")) {
return $source;
}
die "Got unknown input to CreateStreamReader";
}
# @params > 1
my $source = pop @params;
while (@params) {
my $opts = undef;
my $type = pop @params;
if ( defined( ref $type ) and @params and ( $params[-1] eq ' Opts' ) ) {
$opts = $type;
$type = pop @params;
}
if (not exists $_streamTypes{$type}) {
die "CreateStreamReader: Unrecognized type: $type";
}
$source = $_streamTypes{$type}->new($source, $opts);
}
return $source;
}
sub DESTROY {
my $self = shift;
if ($self->can("disconnect")) {
$self->disconnect();
}
}
package Data::ParseBinary::Stream::Writer;
sub WriteBytes { die "unimplemented" }
sub WriteBits { die "unimplemented" }
sub Flush { die "unimplemented" }
sub isBitStream { die "unimplemented" }
sub seek { die "unimplemented" }
sub tell { die "unimplemented" }
sub _writeBitsForByteStream {
my ($self, $bitdata) = @_;
my $data_len = length($bitdata);
my $zeros_to_add = (-$data_len) % 8;
my $binary = pack "B".($zeros_to_add + $data_len), ('0'x$zeros_to_add).$bitdata;
return $self->WriteBytes($binary);
}
sub _writeBytesForBitStream {
my ($self, $data) = @_;
my $bitdata = unpack "B*", $data;
return $self->WriteBits($bitdata);
}
our %_streamTypes;
sub _registerStreamType {
my ($class, $typeName) = @_;
$_streamTypes{$typeName} = $class;
}
sub CreateStreamWriter {
my @params = @_;
if (@params == 0) {
return $_streamTypes{String}->new();
}
if (@params == 1) {
my $source = $params[0];
if (not defined $source or not ref $source) {
# some value (string?). let's feed it to StringStreamWriter
return $_streamTypes{String}->new($source);
}
if (UNIVERSAL::isa($source, "Data::ParseBinary::Stream::Writer")) {
return $source;
}
die "Got unknown input to CreateStreamWriter";
}
# @params > 1
my $source = pop @params;
while (@params) {
my $type = pop @params;
if (not exists $_streamTypes{$type}) {
die "CreateStreamWriter: Unrecognized type: $type";
}
$source = $_streamTypes{$type}->new($source);
}
return $source;
}
sub DESTROY {
my $self = shift;
$self->Flush();
if ($self->can("disconnect")) {
$self->disconnect();
}
}
package Data::ParseBinary::Stream::WrapperBase;
# this is a nixin class for streams that will warp other streams
sub _warping {
my ($self, $sub_stream) = @_;
if ($sub_stream->{is_warped}) {
die "Wrapping Stream " . ref($self) . ": substream is already wraped!";
}
$self->{ss} = $sub_stream;
$sub_stream->{is_wraped} = 1;
}
sub ss {
my $self = shift;
return $self->{ss};
}
sub disconnect {
my ($self) = @_;
$self->{ss}->{is_wraped} = 0;
$self->{ss} = undef;
}
1;