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GIFFManager.h

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//C-  -*- C++ -*-
//C- -------------------------------------------------------------------
//C- DjVuLibre-3.5
//C- Copyright (c) 2002  Leon Bottou and Yann Le Cun.
//C- Copyright (c) 2001  AT&T
//C-
//C- This software is subject to, and may be distributed under, the
//C- GNU General Public License, Version 2. The license should have
//C- accompanied the software or you may obtain a copy of the license
//C- from the Free Software Foundation at http://www.fsf.org .
//C-
//C- This program is distributed in the hope that it will be useful,
//C- but WITHOUT ANY WARRANTY; without even the implied warranty of
//C- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//C- GNU General Public License for more details.
//C- 
//C- DjVuLibre-3.5 is derived from the DjVu(r) Reference Library
//C- distributed by Lizardtech Software.  On July 19th 2002, Lizardtech 
//C- Software authorized us to replace the original DjVu(r) Reference 
//C- Library notice by the following text (see doc/lizard2002.djvu):
//C-
//C-  ------------------------------------------------------------------
//C- | DjVu (r) Reference Library (v. 3.5)
//C- | Copyright (c) 1999-2001 LizardTech, Inc. All Rights Reserved.
//C- | The DjVu Reference Library is protected by U.S. Pat. No.
//C- | 6,058,214 and patents pending.
//C- |
//C- | This software is subject to, and may be distributed under, the
//C- | GNU General Public License, Version 2. The license should have
//C- | accompanied the software or you may obtain a copy of the license
//C- | from the Free Software Foundation at http://www.fsf.org .
//C- |
//C- | The computer code originally released by LizardTech under this
//C- | license and unmodified by other parties is deemed "the LIZARDTECH
//C- | ORIGINAL CODE."  Subject to any third party intellectual property
//C- | claims, LizardTech grants recipient a worldwide, royalty-free, 
//C- | non-exclusive license to make, use, sell, or otherwise dispose of 
//C- | the LIZARDTECH ORIGINAL CODE or of programs derived from the 
//C- | LIZARDTECH ORIGINAL CODE in compliance with the terms of the GNU 
//C- | General Public License.   This grant only confers the right to 
//C- | infringe patent claims underlying the LIZARDTECH ORIGINAL CODE to 
//C- | the extent such infringement is reasonably necessary to enable 
//C- | recipient to make, have made, practice, sell, or otherwise dispose 
//C- | of the LIZARDTECH ORIGINAL CODE (or portions thereof) and not to 
//C- | any greater extent that may be necessary to utilize further 
//C- | modifications or combinations.
//C- |
//C- | The LIZARDTECH ORIGINAL CODE is provided "AS IS" WITHOUT WARRANTY
//C- | OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
//C- | TO ANY WARRANTY OF NON-INFRINGEMENT, OR ANY IMPLIED WARRANTY OF
//C- | MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
//C- +------------------------------------------------------------------
// 
// $Id: GIFFManager.h,v 1.8 2003/11/07 22:08:21 leonb Exp $
// $Name: release_3_5_15 $

#ifndef _GIFFMANAGER_H
#define _GIFFMANAGER_H
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#if NEED_GNUG_PRAGMAS
# pragma interface
#endif


#include "IFFByteStream.h"
#include "GContainer.h"
#include "Arrays.h"
#include "GSmartPointer.h"
#include "GString.h"

#ifdef HAVE_NAMESPACES
namespace DJVU {
# ifdef NOT_DEFINED // Just to fool emacs c++ mode
}
#endif
#endif


class GIFFChunk : public GPEnabled
{
protected:
   GIFFChunk(void);
   GIFFChunk(const GUTF8String &name);
   GIFFChunk(const GUTF8String &name, const TArray<char> & data);
public:
   static GP<GIFFChunk> create(void) {return new GIFFChunk();}

   static GP<GIFFChunk> create(const GUTF8String &name)
   {return new GIFFChunk(name);}

   static GP<GIFFChunk> create(const GUTF8String &name, const TArray<char> & data)
   { return new GIFFChunk(name,data); }

   virtual ~GIFFChunk(void);

   GUTF8String  get_name(void) const;
   GUTF8String  get_full_name(void) const;
   GUTF8String  get_type(void) const;
   bool     is_container(void) const;
   void     set_name(GUTF8String name);
   bool     check_name(GUTF8String name);

   void     add_chunk(const GP<GIFFChunk> & chunk, int order=-1);
   void     del_chunk(const GUTF8String &name);
   GP<GIFFChunk>get_chunk(const GUTF8String &name, int * position=0);
   int      get_chunks_number(const GUTF8String &name);
   int      get_chunks_number(void);
   TArray<char> get_data(void) const;
   
   void     save(IFFByteStream & istr, bool use_trick=0);
private:
   char         name[5];
   GUTF8String      type;
   GPList<GIFFChunk>    chunks;
   TArray<char>     data;
   static GUTF8String decode_name(const GUTF8String &name, int &number);
};

inline GUTF8String
GIFFChunk::get_name(void) const { return GUTF8String(name, 4); }

inline GUTF8String
GIFFChunk::get_type(void) const { return type; }

inline GUTF8String
GIFFChunk::get_full_name(void) const { return get_type()+":"+get_name(); }

inline bool
GIFFChunk::is_container(void) const { return type.length()!=0; }

inline TArray<char>
GIFFChunk::get_data(void) const { return data; }

inline
GIFFChunk::GIFFChunk(void) { name[0]=0; }

inline
GIFFChunk::GIFFChunk(const GUTF8String &name) { set_name(name); }

inline
GIFFChunk::GIFFChunk(const GUTF8String &name, const TArray<char> & data_in) :
      data(data_in)
{
   set_name(name);
}

//************************************************************************

class GIFFManager : public GPEnabled
{
protected:
   GIFFManager(void);
   void init(void);
   void init(const GUTF8String &name);
public:
   static GP<GIFFManager> create(void);

   static GP<GIFFManager> create(const GUTF8String &name);

   virtual ~GIFFManager(void);

   void     set_name(const GUTF8String &name);
   void     add_chunk(GUTF8String parent_name, const GP<GIFFChunk> & chunk, int pos=-1);
   void     add_chunk(GUTF8String name, const TArray<char> & data);
   void     del_chunk(GUTF8String name);
   void     del_chunk(void);
   int      get_chunks_number(const GUTF8String &name);
   int      get_chunks_number(void);

   GP<GIFFChunk>get_chunk(GUTF8String name, int * position=0);

   void     load_chunk(IFFByteStream & istr, GP<GIFFChunk> chunk);
   void     load_file(GP<ByteStream> str);
   void     load_file(const TArray<char> & data);
   void     save_file(GP<ByteStream> str);
   void     save_file(TArray<char> & data);

private:
   GP<GIFFChunk>    top_level;

   static const char *  check_leading_dot(const GUTF8String &name);
private: //dummy methods
   static void save_file(ByteStream *);
   static void load_file(ByteStream *);
};

inline void
GIFFManager::set_name(const GUTF8String &name)
{
   top_level->set_name(name);
}

inline
GIFFManager::GIFFManager(void) {}

inline  void
GIFFManager::init(void)
{
  top_level=GIFFChunk::create();
}

inline  void
GIFFManager::init(const GUTF8String &name)
{
  top_level=GIFFChunk::create(name);
}


#ifdef HAVE_NAMESPACES
}
# ifndef NOT_USING_DJVU_NAMESPACE
using namespace DJVU;
# endif
#endif
#endif

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