//-----------------------------------------------------------------------------+
// Copyright (C), 1998-2007, Beijing Tangent Software Co. Ltd.
// = FileName	:   TBitTable.h
// = Version	:   ver2.0
// = Author		:   xlc
// = CreateDate	:   2002-09-09
// = Description:   类的声明,位数组，以位或位单元的模式来进行数据读写和内存分配，用于大规模控制矩阵
// = Maintainers: 
//                  
//-----------------------------------------------------------------------------+
#ifndef _TBITTABLE_H_
#define _TBITTABLE_H_

class GEOAPI TBitTable
{
public:
	TBitTable(long unitNum, long unitSize = 1);
	TBitTable(void* p, long byteSize, bool bClient = true);
	TBitTable& operator = (const TBitTable& bTable);
	void Attach(long byteSize, char *p);
	char* Detach();
	~TBitTable();

	//位数转字节数
	static long BitToByte(long bitNum);
	bool IsValidIndex(long i) const;
	long GetLength() const;
	long GetByteSize() const;
	long GetBitSize() const;
	void SetUnitSize(long size);
	long GetUnitSize() const;
	//新单元数
	void Realloc(long unitNum);

	//bit read/write,使用位索引，非单元索引!
	bool operator[](long i);
	void Set(long i);
	void Reset(long i);

	//unit read/write
	//取单元值
	long GetValue(long i) const;
	//单元赋值
	void SetValue(long i,char value);
	void SetAll(char value);
	void SetAll();
	void Reset();

	//data transfer
	operator char() const;
	operator int() const;
	operator float() const;
	operator double() const;
	operator const char*() const;
	operator const int*() const;
	operator const float*() const;
	operator const double*() const;

protected:
	//位定位
	void BitToByte(long i, long& byteIndex,long& bitIndex) const;
	//单元定位
	void UnitToByte(long i, long& byteIndex,long& bitIndex) const;

protected:
	long length;		//unit num
	long unit;			//unit length; 仅支持1,2,4
	char *pData;
	bool bOwner;		//是否数据代理
};

#endif