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iffInputFile.h
00001 // Filename: iffInputFile.h
00002 // Created by:  drose (24Apr01)
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 IFFINPUTFILE_H
00016 #define IFFINPUTFILE_H
00017 
00018 #include "pandatoolbase.h"
00019 
00020 #include "iffId.h"
00021 #include "iffChunk.h"
00022 
00023 #include "typedObject.h"
00024 #include "pointerTo.h"
00025 
00026 class Datagram;
00027 
00028 ////////////////////////////////////////////////////////////////////
00029 //       Class : IffInputFile
00030 // Description : A wrapper around an istream used for reading an IFF
00031 //               file.
00032 ////////////////////////////////////////////////////////////////////
00033 class IffInputFile : public TypedObject {
00034 public:
00035   IffInputFile();
00036   virtual ~IffInputFile();
00037 
00038   bool open_read(Filename filename);
00039   void set_input(istream *input, bool owns_istream);
00040 
00041   INLINE void set_filename(const Filename &filename);
00042   INLINE const Filename &get_filename() const;
00043 
00044   INLINE bool is_eof() const;
00045   INLINE size_t get_bytes_read() const;
00046 
00047   INLINE void align();
00048 
00049   PN_int8 get_int8();
00050   PN_uint8 get_uint8();
00051 
00052   PN_int16 get_be_int16();
00053   PN_int32 get_be_int32();
00054   PN_uint16 get_be_uint16();
00055   PN_uint32 get_be_uint32();
00056   PN_stdfloat get_be_float32();
00057 
00058   string get_string();
00059 
00060   IffId get_id();
00061 
00062   PT(IffChunk) get_chunk();
00063   PT(IffChunk) get_subchunk(IffChunk *context);
00064 
00065   bool read_byte(char &byte);
00066   bool read_bytes(Datagram &datagram, int length);
00067   bool skip_bytes(int length);
00068 
00069 protected:
00070   virtual IffChunk *make_new_chunk(IffId id);
00071 
00072   istream *_input;
00073   Filename _filename;
00074   bool _owns_istream;
00075   bool _eof;
00076   bool _unexpected_eof;
00077   size_t _bytes_read;
00078 
00079 public:
00080   virtual TypeHandle get_type() const {
00081     return get_class_type();
00082   }
00083   virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
00084   static TypeHandle get_class_type() {
00085     return _type_handle;
00086   }
00087   static void init_type() {
00088     TypedObject::init_type();
00089     register_type(_type_handle, "IffInputFile",
00090                   TypedObject::get_class_type());
00091   }
00092 
00093 private:
00094   static TypeHandle _type_handle;
00095 
00096   friend class IffChunk;
00097 };
00098 
00099 #include "iffInputFile.I"
00100 
00101 #endif
00102 
00103 
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