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fltObject.cxx
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1/**
2 * PANDA 3D SOFTWARE
3 * Copyright (c) Carnegie Mellon University. All rights reserved.
4 *
5 * All use of this software is subject to the terms of the revised BSD
6 * license. You should have received a copy of this license along
7 * with this source code in a file named "LICENSE."
8 *
9 * @file fltObject.cxx
10 * @author drose
11 * @date 2000-08-24
12 */
13
14#include "fltObject.h"
15#include "fltRecordReader.h"
16#include "fltRecordWriter.h"
17
18TypeHandle FltObject::_type_handle;
19
20/**
21 *
22 */
23FltObject::
24FltObject(FltHeader *header) : FltBeadID(header) {
25}
26
27/**
28 * Fills in the information in this bead based on the information given in the
29 * indicated datagram, whose opcode has already been read. Returns true on
30 * success, false if the datagram is invalid.
31 */
32bool FltObject::
33extract_record(FltRecordReader &reader) {
34 if (!FltBeadID::extract_record(reader)) {
35 return false;
36 }
37
38 nassertr(reader.get_opcode() == FO_object, false);
39 DatagramIterator &iterator = reader.get_iterator();
40
41 _flags = iterator.get_be_uint32();
42 _relative_priority = iterator.get_be_int16();
43 _transparency = iterator.get_be_int16();
44 _special_id1 = iterator.get_be_int16();
45 _special_id2 = iterator.get_be_int16();
46 _significance = iterator.get_be_int16();
47 iterator.skip_bytes(2);
48
49 check_remaining_size(iterator);
50 return true;
51}
52
53/**
54 * Fills up the current record on the FltRecordWriter with data for this
55 * record, but does not advance the writer. Returns true on success, false if
56 * there is some error.
57 */
58bool FltObject::
59build_record(FltRecordWriter &writer) const {
60 if (!FltBeadID::build_record(writer)) {
61 return false;
62 }
63
64 writer.set_opcode(FO_object);
65 Datagram &datagram = writer.update_datagram();
66
67 datagram.add_be_uint32(_flags);
68 datagram.add_be_int16(_relative_priority);
69 datagram.add_be_int16(_transparency);
70 datagram.add_be_int16(_special_id1);
71 datagram.add_be_int16(_special_id2);
72 datagram.add_be_int16(_significance);
73 datagram.pad_bytes(2);
74
75 return true;
76}
A class to retrieve the individual data elements previously stored in a Datagram.
void skip_bytes(size_t size)
Skips over the indicated number of bytes in the datagram.
uint32_t get_be_uint32()
Extracts an unsigned 32-bit big-endian integer.
int16_t get_be_int16()
Extracts a signed 16-bit big-endian integer.
An ordered list of data elements, formatted in memory for transmission over a socket or writing to a ...
Definition datagram.h:38
void add_be_uint32(uint32_t value)
Adds an unsigned 32-bit big-endian integer to the datagram.
Definition datagram.I:181
void add_be_int16(int16_t value)
Adds a signed 16-bit big-endian integer to the datagram.
Definition datagram.I:145
void pad_bytes(size_t size)
Adds the indicated number of zero bytes to the datagram.
Definition datagram.cxx:99
A base class for any of a broad family of flt beads that include an ID.
Definition fltBeadID.h:24
This is the first bead in the file, the top of the bead hierarchy, and the primary interface to readi...
Definition fltHeader.h:44
This class turns an istream into a sequence of FltRecords by reading a sequence of Datagrams and extr...
FltOpcode get_opcode() const
Returns the opcode associated with the current record.
DatagramIterator & get_iterator()
Returns an iterator suitable for extracting data from the current record.
This class writes a sequence of FltRecords to an ostream, handling opcode and size counts properly.
void set_opcode(FltOpcode opcode)
Sets the opcode associated with the current record.
Datagram & update_datagram()
Returns a modifiable reference to the datagram associated with the current record.
void check_remaining_size(const DatagramIterator &di, const std::string &name=std::string()) const
Checks that the iterator has no bytes left, as it should at the end of a successfully read record.
TypeHandle is the identifier used to differentiate C++ class types.
Definition typeHandle.h:81
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.