dataNodeTransmit.cxx

// Filename: dataNodeTransmit.cxx
// Created by:  drose (11Mar02)
//
////////////////////////////////////////////////////////////////////
//
// PANDA 3D SOFTWARE
// Copyright (c) Carnegie Mellon University.  All rights reserved.
//
// All use of this software is subject to the terms of the revised BSD
// license.  You should have received a copy of this license along
// with this source code in a file named "LICENSE."
//
////////////////////////////////////////////////////////////////////

#include "dataNodeTransmit.h"
#include "bamReader.h"
#include "bamWriter.h"

TypeHandle DataNodeTransmit::_type_handle;

////////////////////////////////////////////////////////////////////
//     Function: DataNodeTransmit::Destructor
//       Access: Public, Virtual
//  Description: 
////////////////////////////////////////////////////////////////////
DataNodeTransmit::
~DataNodeTransmit() {
}

////////////////////////////////////////////////////////////////////
//     Function: DataNodeTransmit::slot_data
//       Access: Private
//  Description: Ensures that the given index number exists in the
//               data array.
////////////////////////////////////////////////////////////////////
void DataNodeTransmit::
slot_data(int index) {
  nassertv(index < 1000);
  while (index >= (int)_data.size()) {
    _data.push_back(EventParameter());
  }
}

////////////////////////////////////////////////////////////////////
//     Function: DataNodeTransmit::register_with_read_factory
//       Access: Public, Static
//  Description: Tells the BamReader how to create objects of type
//               Lens.
////////////////////////////////////////////////////////////////////
void DataNodeTransmit::
register_with_read_factory() {
  BamReader::get_factory()->register_factory(get_class_type(), make_from_bam);
}

////////////////////////////////////////////////////////////////////
//     Function: DataNodeTransmit::write_datagram
//       Access: Public, Virtual
//  Description: Writes the contents of this object to the datagram
//               for shipping out to a Bam file.
////////////////////////////////////////////////////////////////////
void DataNodeTransmit::
write_datagram(BamWriter *manager, Datagram &dg) {
  TypedWritable::write_datagram(manager, dg);

  dg.add_uint16(_data.size());
  Data::const_iterator di;
  for (di = _data.begin(); di != _data.end(); ++di) {
    const EventParameter &param = (*di);
    TypedWritableReferenceCount *ptr = param.get_ptr();
    manager->write_pointer(dg, ptr);
  }
}

////////////////////////////////////////////////////////////////////
//     Function: DataNodeTransmit::complete_pointers
//       Access: Public, Virtual
//  Description: Receives an array of pointers, one for each time
//               manager->read_pointer() was called in fillin().
//               Returns the number of pointers processed.
////////////////////////////////////////////////////////////////////
int DataNodeTransmit::
complete_pointers(TypedWritable **p_list, BamReader *manager) {
  int pi = TypedWritable::complete_pointers(p_list, manager);

  Data::iterator di;
  for (di = _data.begin(); di != _data.end(); ++di) {
    (*di) = EventParameter(DCAST(TypedWritableReferenceCount, p_list[pi++]));
  }

  return pi;
}

////////////////////////////////////////////////////////////////////
//     Function: DataNodeTransmit::make_from_bam
//       Access: Protected, Static
//  Description: This function is called by the BamReader's factory
//               when a new object of type Lens is encountered
//               in the Bam file.  It should create the Lens
//               and extract its information from the file.
////////////////////////////////////////////////////////////////////
TypedWritable *DataNodeTransmit::
make_from_bam(const FactoryParams &params) {
  DataNodeTransmit *xmit = new DataNodeTransmit;
  DatagramIterator scan;
  BamReader *manager;

  parse_params(params, scan, manager);
  xmit->fillin(scan, manager);

  return xmit;
}

////////////////////////////////////////////////////////////////////
//     Function: DataNodeTransmit::fillin
//       Access: Protected
//  Description: This internal function is called by make_from_bam to
//               read in all of the relevant data from the BamFile for
//               the new Lens.
////////////////////////////////////////////////////////////////////
void DataNodeTransmit::
fillin(DatagramIterator &scan, BamReader *manager) {
  TypedWritable::fillin(scan, manager);

  int num_params = scan.get_uint16();
  _data.reserve(num_params);
  for (int i = 0; i < num_params; i++) {
    manager->read_pointer(scan);
    _data.push_back(EventParameter());
  }
}