Leaked source code of windows server 2003
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/*++
Copyright (c) 1997 Microsoft Corporation
Module Name:
spaset.hxx
Abstract:
This class implements a sparse number set with huge (<= ULONG) number of elements. The numset.cxx implementation uses too much memory when the number of elements is in the 100,000 range. The numbers stored are not in any particular order and this implementation only supports a subset of set operations.
Author:
Daniel Chan (danielch) 01-29-97
--*/
#if !defined(SPARSE_SET_DEFN)
#define SPARSE_SET_DEFN
#include "bigint.hxx"
#if defined ( _AUTOCHECK_ )
#define IFSUTIL_EXPORT
#elif defined ( _IFSUTIL_MEMBER_ )
#define IFSUTIL_EXPORT __declspec(dllexport)
#else
#define IFSUTIL_EXPORT __declspec(dllimport)
#endif
CONST USHORT SPA_SET_HASH_TABLE_SIZE = 256; CONST ULONG SPA_SET_HASH_ELEMENT_INC = 50;
DECLARE_CLASS( SPARSE_SET );
typedef struct _HASH_ELEMENT {
BIG_INT elementCount; // number of elements in elements
BIG_INT maxElementCount; // max. number of elements in element
PBIG_INT elements; // pointer to an array of BIG_INTs
};
DEFINE_TYPE( _HASH_ELEMENT, HASH_ELEMENT );
class SPARSE_SET : public OBJECT {
public:
IFSUTIL_EXPORT DECLARE_CONSTRUCTOR( SPARSE_SET );
VIRTUAL IFSUTIL_EXPORT ~SPARSE_SET( );
NONVIRTUAL IFSUTIL_EXPORT BOOLEAN Initialize( );
NONVIRTUAL IFSUTIL_EXPORT BOOLEAN CheckAndAdd( IN BIG_INT Number, OUT PBOOLEAN Duplicate DEFAULT NULL );
NONVIRTUAL IFSUTIL_EXPORT BOOLEAN RemoveAll( );
NONVIRTUAL IFSUTIL_EXPORT BOOLEAN CheckAndRemove( IN BIG_INT Number, OUT PBOOLEAN DoesExists DEFAULT NULL );
NONVIRTUAL BIG_INT QueryCardinality( ) CONST;
NONVIRTUAL IFSUTIL_EXPORT VOID DumpHashTable( );
private:
NONVIRTUAL VOID Construct ( );
NONVIRTUAL VOID Destroy( );
PHASH_ELEMENT _hashTable; BIG_INT _card;
};
INLINE BIG_INT SPARSE_SET::QueryCardinality( ) CONST /*++
Routine Description:
This routine computes the number of elements in the set.
Arguments:
None.
Return Value:
The number of elements in the set.
--*/ { return _card; }
#endif // SPARSE_SET_DEFN
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