Source code of Windows XP (NT5)
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///////////////////////////////////////////////////////////////////////////////////////////////////////////
//
// Microsoft WMIOLE DB Provider
// (C) Copyright 1999 Microsoft Corporation. All Rights Reserved.
//
// Class Definitions for Bitarray Class
//
///////////////////////////////////////////////////////////////////////////////////////////////////////////
#ifndef _BITARRAY_H_
#define _BITARRAY_H_
//=================================================================================
// Forward Declaration
//=================================================================================
class FAR CBitArray;typedef CBitArray FAR *LPBITARRAY;
//=================================================================================
// Allocates and manages a bit array through various methods defined in the class
//
// hungarian bits or pbits
//
//=================================================================================
class FAR CBitArray{ private: LONG_PTR m_cslotCurrent; //Count of Slots
LONG_PTR m_cPageMax; //Maximum number of pages
LONG_PTR m_cPageCurrent; //Current number of pages
LONG_PTR m_cbPage; //Number of bytes per page
BYTE m_rgbBitMask[8]; //Mask buffer
BYTE * m_rgbBit; //Bit Array
public: CBitArray( void ); //Class constructor
~CBitArray( void ); //Class destructor
STDMETHODIMP FInit(HSLOT cslotMax, ULONG cbPage); //Initialization method
STDMETHODIMP SetSlots(HSLOT islotFirst, HSLOT islotLast); //Set a range of slots
STDMETHODIMP ResetSlots(HSLOT islotFirst, HSLOT islotLast); //Reset a range of slots
VOID ResetAllSlots(void); //Reset all slots
STDMETHODIMP ArrayEmpty(void); //Check if any bits are set
STDMETHODIMP IsSlotSet(HSLOT islot); //Check the status of a particular bit
STDMETHODIMP FindSet(HSLOT islotStart, HSLOT islotLimit, HSLOT* pislot); //Find the first set bit in a range of bits
};
#endif
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