90 lines
2 KiB
C++
90 lines
2 KiB
C++
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//+---------------------------------------------------------------------------
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//
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// Copyright (C) 1994 - 1988, Microsoft Corporation
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//
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// File: xarray.hxx
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//
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// Contents: Safe array allocation templates
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//
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// Templates: XArray
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//
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// History: 14-Jul-98 SitaramR Created
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//
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//----------------------------------------------------------------------------
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#pragma once
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//+-------------------------------------------------------------------------
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//
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// Class: XArray
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//
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// Purpose: Smart array template based on the new/delete allocator
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//
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// History: 14-Jul-98 SitaramR Created
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//
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//--------------------------------------------------------------------------
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template <class T> class XArray
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{
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public:
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XArray() : _cElems( 0 ), _pElems( 0 )
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{
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}
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XArray( XArray<T> & src )
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{
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//
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// Don't do this in initializers -- _pElems is declared first
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// so the old array is acquired before the count is copied
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//
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_cElems = src._cElems;
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_pElems = src.Acquire();
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}
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~XArray(void) { if (_pElems) { delete [] _pElems;} }
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BOOL Init( SIZE_T cElems )
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{
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Assert( _pElems == 0 );
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_cElems = cElems;
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_pElems = new T[(int)cElems];
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return ( _pElems != 0 );
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}
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void Set( SIZE_T cElems, T * pElems )
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{
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Assert( _pElems == 0 );
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_cElems = cElems;
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_pElems = pElems;
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}
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T * Get() const { return _pElems; }
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T * GetPointer() const { return _pElems; }
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T * Acquire() { T * p = _pElems; _pElems = 0; _cElems = 0; return p; }
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BOOL IsNull() const { return ( 0 == _pElems); }
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T & operator[](SIZE_T iElem) { return _pElems[iElem]; }
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T const & operator[](SIZE_T iElem) const { return _pElems[iElem]; }
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SIZE_T Count() const { return _cElems; }
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SIZE_T SizeOf() const { return _cElems * sizeof T; }
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void Free() { delete [] Acquire(); }
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private:
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T * _pElems;
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SIZE_T _cElems;
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};
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