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FXGzipStream.h

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00001 /********************************************************************************
00002 *                                                                               *
00003 *                  GZip compression on any stream                               *
00004 *                                                                               *
00005 *********************************************************************************
00006 * Copyright (C) 2003 by Mathew Robertson.   All Rights Reserved.                *
00007 *********************************************************************************
00008 * This library is free software; you can redistribute it and/or                 *
00009 * modify it under the terms of the GNU Lesser General Public                    *
00010 * License as published by the Free Software Foundation; either                  *
00011 * version 2.1 of the License, or (at your option) any later version.            *
00012 *                                                                               *
00013 * This library is distributed in the hope that it will be useful,               *
00014 * but WITHOUT ANY WARRANTY; without even the implied warranty of                *
00015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU             *
00016 * Lesser General Public License for more details.                               *
00017 *                                                                               *
00018 * You should have received a copy of the GNU Lesser General Public              *
00019 * License along with this library; if not, write to the Free Software           *
00020 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.    *
00021 ********************************************************************************/
00022 #ifdef HAVE_LIBZ
00023 #ifndef FXGZIPSTREAM_H
00024 #define FXGZIPSTREAM_H
00025 
00026 #ifndef FXBUFFEREDSTREAM_H
00027 #include "FXBufferedStream.h"
00028 #endif
00029 namespace FXEX {
00030 
00031 /**
00032  * Provides a way to GZIP un/compress any type of FOX stream
00033  */
00034 class FXAPI FXGzipStream : public FXBufferedStream {
00035 
00036 private:
00037   FXint blockSize;           // number of 100K block sizes - relates directly to compression factor
00038 
00039 protected:
00040 
00041   /// prior to saving buffer to stream, compress it
00042   virtual FXbool bufferSave();
00043 
00044   /// after loading from stream, uncompress it
00045   virtual FXbool bufferLoad();
00046 
00047 public:
00048 
00049   /// Create a Gzip stream to save-to or load-from based on the direction of the underlying stream
00050   FXGzipStream(FXStream* s,FXint compFactor=COMPRESS_MAX,const FXObject* cont=NULL);
00051 
00052   /// Destructor
00053   virtual ~FXGzipStream() {}
00054   };
00055 
00056 } // namespace FXEX
00057 #endif // FXGZIPSRTEAM_H
00058 #endif