[pclasses-cvs] pclasses2/include/pclasses/IO BZip2.h,NONE,1.1

[Christian P. <cp...@us...>]

Update of /cvsroot/pclasses/pclasses2/include/pclasses/IO
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv6341/include/pclasses/IO

Added Files:
	BZip2.h 
Log Message:
Added bzip2 support.


--- NEW FILE: BZip2.h ---
/***************************************************************************
 *   Copyright (C) 2004 by Christian Prochnow                              *
 *   cp...@se...                                                   *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU Library General Public License as       *
 *   published by the Free Software Foundation; either version 2 of the    *
 *   License, or (at your option) any later version.                       *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU Library General Public     *
 *   License along with this program; if not, write to the                 *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/

#ifndef P_IO_BZip2_h
#define P_IO_BZip2_h
 
#include <pclasses/Exception.h>
#include <pclasses/IntTypes.h>
#include <string>

namespace P {

namespace IO {

//! BZip2 error
class BZip2Error: public RuntimeError {
	public:
		BZip2Error(int err, const char* what, const SourceInfo& si);
		~BZip2Error();

		int errorNo() const throw();
		std::string msg() const throw();

	private:
		int _err;
};

//! Bzip2 stream base
class BZip2Stream {
	public:
		BZip2Stream(size_t bufferSize);
		virtual ~BZip2Stream();

		//! Number of bytes available to consume
		size_t bytesAvail() const throw();

		//! Returns a pointer to the produced data
		const char* buffer() const throw();

		//! Dequeue produced data
		size_t dequeue(size_t count) throw(BZip2Error);

		//! Put data into producer buffer
		void put(const char* buffer, size_t count) throw(BZip2Error);

	protected:
		void*     _strm;
		char*     _buffer;
		size_t    _bufferSize;
};

//! BZip2 output (deflate) stream
class BZip2OutputStream: public BZip2Stream {
	public:
		BZip2OutputStream(int level = 6, size_t bufferSize = 1024) throw(BZip2Error);
		~BZip2OutputStream() throw();

		//! Compress buffer into output buffer
		/*!
			Returns the number of bytes actually deflated.
		*/
		size_t compress(const char* buffer, size_t count) throw(BZip2Error);

		void sync() throw(BZip2Error);

		//! Finish compression and reset state
		bool finish() throw(BZip2Error);

		//! Reset stream
		void reset() throw(BZip2Error);
};

//! BZip2 input (inflate) stream
class BZip2InputStream: public BZip2Stream {
	public:
		BZip2InputStream(size_t bufferSize = 1024) throw(BZip2Error);
		~BZip2InputStream() throw();

		//! Decompress buffer into output buffer
		/*!
			Returns the number of bytes actually inflated, which may be NULL
			when <count> is NULL or the end of the stream has been reached.
		*/
		size_t decompress(const char* buffer, size_t count) throw(BZip2Error);

		bool eof() const throw();

		//! Reset stream
		void reset() throw(BZip2Error);

	private:
		bool _eof;
};

} // !namespace IO

} // !namespace P

#endif