148 lines
2.5 KiB
C++
148 lines
2.5 KiB
C++
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/*++
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Copyright (c) 1997 Microsoft Corporation
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All rights reserved.
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Module Name:
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bitarray.hxx
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Abstract:
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Bit array
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Author:
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Steve Kiraly (SteveKi) 1/12/97
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Revision History:
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--*/
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#ifndef _BITARRAY_HXX
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#define _BITARRAY_HXX
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class TBitArray {
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public:
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typedef UINT Type;
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enum {
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kBitsInType = sizeof( Type ) * 8,
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kBitsInTypeMask = 0xFFFFFFFF,
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};
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TBitArray(
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IN UINT uBits = kBitsInType,
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IN UINT uGrowSize = kBitsInType
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);
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TBitArray(
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IN const TBitArray &rhs
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);
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const TBitArray &
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operator=(
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IN const TBitArray &rhs
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);
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~TBitArray(
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VOID
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);
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BOOL
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bValid(
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VOID
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) const;
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BOOL
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bToString( // Return string representation of bit array
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IN TString &strBits
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) const;
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BOOL
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bRead(
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IN UINT uBit // Range 0 to nBit - 1
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) const;
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BOOL
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bSet(
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IN UINT uBit // Range 0 to nBit - 1
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);
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BOOL
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bReset(
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IN UINT uBit // Range 0 to nBit - 1
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);
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BOOL
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bToggle(
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IN UINT uBit // Range 0 to nBit - 1
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);
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BOOL
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bAdd(
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VOID // Add one bit to the array
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);
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UINT
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uNumBits( // Return the total number of bits in the array
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VOID
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) const;
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VOID
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vSetAll( // Set all the bits in the array
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VOID
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);
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VOID
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vResetAll( // Reset all the bits in the array
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VOID
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);
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BOOL
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bFindNextResetBit( // Locate first cleared bit in the array
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IN UINT *puNextFreeBit
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);
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private:
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BOOL
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bClone( // Make a copy of the bit array
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IN const TBitArray &rhs
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);
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BOOL
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bGrow( // Expand the bit array by x number of bits
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IN UINT uGrowSize
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);
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UINT
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nBitsToType(
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IN UINT uBits // Range 1 to nBit
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) const;
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Type
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BitToMask(
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IN UINT uBit // Range 0 to nBit - 1
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) const;
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UINT
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BitToIndex(
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IN UINT uBit // Range 0 to nBit - 1
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) const;
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BOOL
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bIsValidBit(
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IN UINT uBit // Range 0 to nBit - 1
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) const;
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UINT _nBits; // Number of currently allocated bits, Range 1 to n
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Type *_pBits; // Pointer to array which contains the bits
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UINT _uGrowSize; // Default number of bits to grow by
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};
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#endif
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