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fltInstanceDefinition.cxx
00001 // Filename: fltInstanceDefinition.cxx
00002 // Created by:  drose (30Aug00)
00003 //
00004 ////////////////////////////////////////////////////////////////////
00005 //
00006 // PANDA 3D SOFTWARE
00007 // Copyright (c) Carnegie Mellon University.  All rights reserved.
00008 //
00009 // All use of this software is subject to the terms of the revised BSD
00010 // license.  You should have received a copy of this license along
00011 // with this source code in a file named "LICENSE."
00012 //
00013 ////////////////////////////////////////////////////////////////////
00014 
00015 #include "fltInstanceDefinition.h"
00016 #include "fltRecordReader.h"
00017 #include "fltRecordWriter.h"
00018 
00019 TypeHandle FltInstanceDefinition::_type_handle;
00020 
00021 ////////////////////////////////////////////////////////////////////
00022 //     Function: FltInstanceDefinition::Constructor
00023 //       Access: Public
00024 //  Description:
00025 ////////////////////////////////////////////////////////////////////
00026 FltInstanceDefinition::
00027 FltInstanceDefinition(FltHeader *header) : FltBead(header) {
00028   _instance_index = 0;
00029 }
00030 
00031 ////////////////////////////////////////////////////////////////////
00032 //     Function: FltInstanceDefinition::extract_record
00033 //       Access: Protected, Virtual
00034 //  Description: Fills in the information in this bead based on the
00035 //               information given in the indicated datagram, whose
00036 //               opcode has already been read.  Returns true on
00037 //               success, false if the datagram is invalid.
00038 ////////////////////////////////////////////////////////////////////
00039 bool FltInstanceDefinition::
00040 extract_record(FltRecordReader &reader) {
00041   if (!FltBead::extract_record(reader)) {
00042     return false;
00043   }
00044 
00045   nassertr(reader.get_opcode() == FO_instance, false);
00046   DatagramIterator &iterator = reader.get_iterator();
00047 
00048   iterator.skip_bytes(2);
00049   _instance_index = iterator.get_be_int16();
00050 
00051   check_remaining_size(iterator);
00052   return true;
00053 }
00054 
00055 ////////////////////////////////////////////////////////////////////
00056 //     Function: FltInstanceDefinition::build_record
00057 //       Access: Protected, Virtual
00058 //  Description: Fills up the current record on the FltRecordWriter with
00059 //               data for this record, but does not advance the
00060 //               writer.  Returns true on success, false if there is
00061 //               some error.
00062 ////////////////////////////////////////////////////////////////////
00063 bool FltInstanceDefinition::
00064 build_record(FltRecordWriter &writer) const {
00065   if (!FltBead::build_record(writer)) {
00066     return false;
00067   }
00068 
00069   writer.set_opcode(FO_instance);
00070   Datagram &datagram = writer.update_datagram();
00071 
00072   datagram.pad_bytes(2);
00073   datagram.add_be_int16(_instance_index);
00074 
00075   return true;
00076 }
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