Panda3D
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00001 // Filename: fltRecordReader.h 00002 // Created by: drose (24Aug00) 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 #ifndef FLTRECORDREADER_H 00016 #define FLTRECORDREADER_H 00017 00018 #include "pandatoolbase.h" 00019 00020 #include "fltOpcode.h" 00021 #include "fltError.h" 00022 00023 #include "datagram.h" 00024 #include "datagramIterator.h" 00025 00026 //////////////////////////////////////////////////////////////////// 00027 // Class : FltRecordReader 00028 // Description : This class turns an istream into a sequence of 00029 // FltRecords by reading a sequence of Datagrams and 00030 // extracting the opcode from each one. It remembers 00031 // where it is in the file and what the current record 00032 // is. 00033 //////////////////////////////////////////////////////////////////// 00034 class FltRecordReader { 00035 public: 00036 FltRecordReader(istream &in); 00037 ~FltRecordReader(); 00038 00039 FltOpcode get_opcode() const; 00040 DatagramIterator &get_iterator(); 00041 const Datagram &get_datagram(); 00042 int get_record_length() const; 00043 00044 FltError advance(bool ok_eof = false); 00045 00046 bool eof() const; 00047 bool error() const; 00048 00049 private: 00050 void read_next_header(); 00051 00052 istream &_in; 00053 Datagram _datagram; 00054 FltOpcode _opcode; 00055 int _record_length; 00056 DatagramIterator *_iterator; 00057 00058 FltError _next_error; 00059 FltOpcode _next_opcode; 00060 int _next_record_length; 00061 00062 enum State { 00063 S_begin, 00064 S_normal, 00065 S_eof, 00066 S_error 00067 }; 00068 State _state; 00069 }; 00070 00071 #endif 00072 00073