mir_server/Gateway/srvlib/include/zstream.h

#ifndef _WYL_ZLIB_STREAM_H_
#define _WYL_ZLIB_STREAM_H_


/******************************************************************
 *
 *	ʹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ķ<EFBFBD>ʽ<EFBFBD><EFBFBD>װZIPѹ<EFBFBD><EFBFBD><EFBFBD>ͽ<EFBFBD>ѹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>롣
 *
 *****************************************************************/


namespace zstream
{

/*	ZLib<69><62><EFBFBD>Ļ<EFBFBD><C4BB><EFBFBD>
*/

class BaseZStream
	: public stream::BaseStream
{
public:
	typedef BaseStream Inherited;

protected:
	BaseStream*		strm_;			//zlib<69><62><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ<EFBFBD><C4BF><EFBFBD><EFBFBD>
	int				strm_pos_;			//Ŀ<><C4BF><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><D6B8>λ<EFBFBD><CEBB>
	z_stream		z_strm_;			//zlib<69><62><EFBFBD><EFBFBD><EFBFBD><EFBFBD>z_stream<61>ṹ
	Bytef			buff_[0xffff];	//zlib<69><62><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	int				last_code_;		//<2F><>һ<EFBFBD>β<EFBFBD><CEB2><EFBFBD><EFBFBD>ķ<EFBFBD><C4B7><EFBFBD><EFBFBD><EFBFBD>

private:
	static void* zlibAllocMem(BaseZStream& ZStream, uInt Items, uInt Size);
	static void zlibFreeMem(BaseZStream& ZStream, void* lpBlock);

protected:
	//zlib<69><62><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD>뺯<EFBFBD><EBBAAF><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷţ<CDB7><C5A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڼ̳<DABC><CCB3><EFBFBD><EFBFBD>и<EFBFBD><D0B8>Ǵ˺<C7B4><CBBA><EFBFBD>
	virtual void* AllocStream(int size);
	//zlib<69><62><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD><CDB7>ڴ溯<DAB4><E6BAAF><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷţ<CDB7><C5A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڼ̳<DABC><CCB3><EFBFBD><EFBFBD>и<EFBFBD><D0B8>Ǵ˺<C7B4><CBBA><EFBFBD>
	virtual void Free(void* ptr);
	//zlib<69><62><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֪ͨ<CDA8><D6AA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ľ<EFBFBD><C4BD>ȣ<EFBFBD><C8A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>и<EFBFBD><D0B8>Ǵ˺<C7B4><CBBA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	virtual void DoProgress();
	//<2F><><EFBFBD><EFBFBD><EFBFBD>ϵ<EFBFBD>ǰ<EFBFBD><C7B0><EFBFBD><EFBFBD><EFBFBD>ķ<EFBFBD><C4B7><EFBFBD><EFBFBD><EFBFBD>
	inline void setLastCode(const int code)
	{
		last_code_ = code;
	}
public:
	BaseZStream(BaseStream& stream, BaseAllocator* alloc);
	virtual ~BaseZStream();

	//int seek(const int tOffset, const int Origin)
	//{
	//	return 0;
	//}
	//int read(void* lpBuffer, const int tSizeToRead)
	//{
	//	return 0;
	//}
	//int write(const void* lpBuffer, const size_t tSizeToWrite)
	//{
	//	return 0;
	//}
	//int copyFrom(BaseStream& stream, int tSizeToCopy = 0)
	//{
	//	return 0;
	//}

	//<2F><>ȡ<EFBFBD><C8A1>һ<EFBFBD>β<EFBFBD><CEB2><EFBFBD><EFBFBD>ķ<EFBFBD><C4B7><EFBFBD><EFBFBD><EFBFBD>
	inline int getLastCode()
	{
		return last_code_;
	}
	inline int succeeded()
	{
		return last_code_ >= 0;
	}
};


/*	ZLibѹ<62><D1B9><EFBFBD><EFBFBD>
	<EFBFBD>ɶ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݽ<EFBFBD><EFBFBD><EFBFBD>ѹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD>뵽<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
*/
class ZCompressionStream
	: public BaseZStream
{
public:
	typedef BaseZStream Inherited;

	enum CompressionLevel
	{
	    clNone = 0,		//<2F><><EFBFBD>棨δѹ<CEB4><D1B9><EFBFBD><EFBFBD>
	    clFastest,		//<2F><><EFBFBD><EFBFBD>ѹ<EFBFBD><D1B9><EFBFBD><EFBFBD><EFBFBD>ٶȿ죬<C8BF><ECA3AC>ʡʱ<CAA1>䵫ѹ<E4B5AB><D1B9><EFBFBD>Ȳ<EFBFBD><C8B2>ߣ<EFBFBD>
	    clDefault,		//Ĭ<><C4AC>ѹ<EFBFBD><D1B9><EFBFBD>ȼ<EFBFBD><C8BC><EFBFBD>ѹ<EFBFBD><D1B9><EFBFBD>ٶȺ<D9B6>ѹ<EFBFBD><D1B9><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><CABE><EFBFBD><EFBFBD>У<EFBFBD>
	    clMax,			//<2F><><EFBFBD><EFBFBD>ѹ<EFBFBD><D1B9><EFBFBD>ȣ<EFBFBD>ѹ<EFBFBD><D1B9><EFBFBD>ٶ<EFBFBD><D9B6><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѹ<EFBFBD><D1B9><EFBFBD>Ƚϸߣ<CFB8>
	};

public:
	ZCompressionStream(BaseStream& destStream, CompressionLevel CmprsLvl, BaseAllocator* alloc);
	~ZCompressionStream();

	int seek(const int tOffset, const int Origin);
	//int read(void* lpBuffer, const int tSizeToRead)
	//{
	//	return -1;
	//}
	int write(const void* lpBuffer, const size_t tSizeToWrite);
	//<2F>ύѹ<E1BDBB><D1B9><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><D0B5><EFBFBD><EFBFBD>ݵ<EFBFBD><DDB5><EFBFBD><EFBFBD><EFBFBD>
	void finish();
	//<2F><>ȡѹ<C8A1><D1B9><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѹ<EFBFBD><D1B9><EFBFBD>ȣ<EFBFBD><C8A3><EFBFBD><EFBFBD>ص<EFBFBD><D8B5><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	inline float getCompressionRate()
	{
		if (z_strm_.total_in == 0)
			return 0;
		else return (1.0f - ((float)z_strm_.total_out / z_strm_.total_in)) * 100.0f;
	}
	virtual int read(void* lpBuffer, const int tSizeToRead)
	{
		return 0;
	}
};


};

#endif