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stringDecoder.h
00001 // Filename: stringDecoder.h
00002 // Created by:  drose (11Feb02)
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 STRINGDECODER_H
00016 #define STRINGDECODER_H
00017 
00018 #include "dtoolbase.h"
00019 
00020 ////////////////////////////////////////////////////////////////////
00021 //       Class : StringDecoder
00022 // Description : The base class to a family of classes that decode
00023 //               various kinds of encoded byte streams.  Give it a
00024 //               string, then ask it to pull the characters out one at
00025 //               a time.  This also serves as the plain old
00026 //               byte-at-a-time decoder.
00027 ////////////////////////////////////////////////////////////////////
00028 class EXPCL_DTOOL StringDecoder {
00029 public:
00030   INLINE StringDecoder(const string &input);
00031   virtual ~StringDecoder();
00032 
00033   virtual int get_next_character();
00034   INLINE bool is_eof();
00035 
00036   static void set_notify_ptr(ostream *ptr);
00037   static ostream *get_notify_ptr();
00038 
00039 protected:
00040   INLINE bool test_eof();
00041 
00042   string _input;
00043   size_t _p;
00044   bool _eof;
00045   static ostream *_notify_ptr;
00046 };
00047 
00048 ////////////////////////////////////////////////////////////////////
00049 //       Class : StringUtf8Decoder
00050 // Description : This decoder extracts utf-8 sequences.
00051 ////////////////////////////////////////////////////////////////////
00052 class StringUtf8Decoder : public StringDecoder {
00053 public:
00054   INLINE StringUtf8Decoder(const string &input);
00055 
00056   virtual int get_next_character();
00057 };
00058 
00059 ////////////////////////////////////////////////////////////////////
00060 //       Class : StringUnicodeDecoder
00061 // Description : This decoder extracts characters two at a time to get
00062 //               a plain wide character sequence.
00063 ////////////////////////////////////////////////////////////////////
00064 class StringUnicodeDecoder : public StringDecoder {
00065 public:
00066   INLINE StringUnicodeDecoder(const string &input);
00067 
00068   virtual int get_next_character();
00069 };
00070 
00071 #include "stringDecoder.I"
00072 
00073 #endif
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