BITARRAY.H

//-------------------------------------------------------------------- 
// Microsoft OLE DB Sample Provider 
// (C) Copyright 1994 - 1996 Microsoft Corporation.  All Rights Reserved. 
// 
// @doc 
// 
// @module BITARRAY.H | Class Definitions for Bitarray Class 
// 
// 
#ifndef _BITARRAY_H_ 
#define _BITARRAY_H_ 
 
// Forward Declaration 
class FAR CBitArray; 
typedef CBitArray FAR *LPBITARRAY; 
 
 
//-------------------------------------------------------------------- 
// @class Allocates and manages a bit array through various methods  
// defined in the class 
//  
// @hungarian bits or pbits 
// 
class FAR CBitArray 
{ 
private://@access private 
//@cmember Count of Slots 
ULONG    m_cslotCurrent; 
//@cmember Maximum number of pages  
ULONG    m_cPageMax; 
//@cmember Current number of pages 
ULONG    m_cPageCurrent; 
//@cmember Number of bytes per page 
ULONG    m_cbPage; 
//@cmember Mask buffer 
BYTE     m_rgbBitMask[8]; 
//@cmember Bit Array 
BYTE     *m_rgbBit; 
 
 
public://@access public 
//@cmember Class constructor 
CBitArray( void ); 
//@cmember Class destructor 
~CBitArray( void ); 
//@cmember Initialization method 
STDMETHODIMP FInit(ULONG cslotMax, ULONG cbPage); 
//@cmember Set a range of slots 
STDMETHODIMP SetSlots(ULONG islotFirst, ULONG islotLast); 
//@cmember Reset a range of slots 
STDMETHODIMP ResetSlots(ULONG islotFirst, ULONG islotLast); 
//@cmember Reset all slots 
VOID ResetAllSlots(void); 
//@cmember Check if any bits are set 
STDMETHODIMP ArrayEmpty(void); 
//@cmember Check the status of a particular bit 
STDMETHODIMP IsSlotSet(ULONG islot); 
//@cmember Find the first set bit in a range of bits 
STDMETHODIMP FindSet(ULONG islotStart, ULONG islotLimit, ULONG* pislot); 
 
}; 
 
#endif