forked from Rowland/EG
125 lines
3.1 KiB
C++
125 lines
3.1 KiB
C++
/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file fltBeadID.cxx
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* @author drose
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* @date 2000-08-24
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*/
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#include "fltBeadID.h"
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#include "fltRecordReader.h"
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#include "fltRecordWriter.h"
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TypeHandle FltBeadID::_type_handle;
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/**
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*
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*/
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FltBeadID::
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FltBeadID(FltHeader *header) : FltBead(header) {
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}
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/**
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* Returns the id (name) of this particular bead. Each MultiGen bead will
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* have a unique name.
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*/
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const std::string &FltBeadID::
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get_id() const {
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return _id;
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}
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/**
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* Changes the id (name) of this particular bead. This should be a name that
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* is unique to this bead.
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*/
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void FltBeadID::
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set_id(const std::string &id) {
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_id = id;
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}
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/**
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* Writes a quick one-line description of the record, but not its children.
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* This is a human-readable description, primarily for debugging; to write a
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* flt file, use FltHeader::write_flt().
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*/
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void FltBeadID::
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output(std::ostream &out) const {
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out << get_type();
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if (!_id.empty()) {
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out << " " << _id;
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}
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}
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/**
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* Fills in the information in this bead based on the information given in the
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* indicated datagram, whose opcode has already been read. Returns true on
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* success, false if the datagram is invalid.
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*/
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bool FltBeadID::
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extract_record(FltRecordReader &reader) {
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if (!FltBead::extract_record(reader)) {
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return false;
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}
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_id = reader.get_iterator().get_fixed_string(8);
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return true;
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}
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/**
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* Checks whether the given bead, which follows this bead sequentially in the
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* file, is an ancillary record of this bead. If it is, extracts the relevant
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* information and returns true; otherwise, leaves it alone and returns false.
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*/
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bool FltBeadID::
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extract_ancillary(FltRecordReader &reader) {
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if (reader.get_opcode() == FO_long_id) {
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DatagramIterator &di = reader.get_iterator();
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_id = di.get_fixed_string(di.get_remaining_size());
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return true;
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}
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return FltBead::extract_ancillary(reader);
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}
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/**
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* Fills up the current record on the FltRecordWriter with data for this
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* record, but does not advance the writer. Returns true on success, false if
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* there is some error.
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*/
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bool FltBeadID::
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build_record(FltRecordWriter &writer) const {
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if (!FltBead::build_record(writer)) {
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return false;
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}
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writer.update_datagram().add_fixed_string(_id.substr(0, 7), 8);
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return true;
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}
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/**
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* Writes whatever ancillary records are required for this record. Returns
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* FE_ok on success, or something else if there is some error.
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*/
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FltError FltBeadID::
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write_ancillary(FltRecordWriter &writer) const {
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if (_id.length() > 7) {
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Datagram dc;
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// Although the manual mentions nothing of this, it is essential that the
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// length of the record be a multiple of 4 bytes.
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dc.add_fixed_string(_id, (_id.length() + 3) & ~3);
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FltError result = writer.write_record(FO_long_id, dc);
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if (result != FE_ok) {
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return result;
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}
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}
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return FltBead::write_ancillary(writer);
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}
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