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111 lines
2.9 KiB
111 lines
2.9 KiB
///////////////////////////////////////////////////////////////////////////////
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// Copyright (C) Microsoft Corporation, 1998.
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//
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// temparr.hpp
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//
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// Template class used by Direct3D ReferenceRasterizer for stateset and so on.
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//
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// The following error codes should be defined before included this file:
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// DDERR_OUTOFMEMORY
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// D3D_OK
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// DDERR_INVALIDPARAMS
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _TEMPLARR_HPP
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#define _TEMPLARR_HPP
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template <class T> class TemplArray
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{
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public:
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TemplArray( void );
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~TemplArray( void );
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// It is the user of this operator who makes sure 0<=iIndex<m_dwArraySize.
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T& operator []( int iIndex );
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HRESULT CheckAndGrow( DWORD iIndex, DWORD dwGrowDelta = 16 );
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HRESULT CheckRange ( DWORD iIndex );
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// The user needs to make sure 0<=m_dwCurrent<m_dwArraySize.
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inline T CurrentItem(void) { return m_pArray[m_dwCurrent];};
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inline void SetCurrentItem(T item) { m_pArray[m_dwCurrent] = item;};
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inline DWORD CurrentIndex(void) { return m_dwCurrent;};
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inline void SetCurrentIndex(DWORD dwIdx) {m_dwCurrent = dwIdx;};
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inline DWORD ArraySize(void) { return m_dwArraySize;};
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private:
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T *m_pArray;
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DWORD m_dwArraySize;
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// Index to the current item or the size of data stored in the array
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DWORD m_dwCurrent;
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};
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template <class T>
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TemplArray< T >::TemplArray( void )
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{
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m_pArray = NULL;
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m_dwArraySize = 0;
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m_dwCurrent = 0;
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}
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template <class T>
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TemplArray< T >::~TemplArray( void )
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{
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if (m_pArray != NULL)
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delete m_pArray;
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m_dwArraySize = 0;
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}
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template <class T> T&
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TemplArray< T >::operator[]( int iIndex )
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{
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return m_pArray[iIndex];
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}
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template <class T> HRESULT
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TemplArray< T >::CheckAndGrow( DWORD iIndex, DWORD dwGrowDelta )
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{
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if (iIndex >= m_dwArraySize)
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{
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DWORD dwNewArraySize = m_dwArraySize + dwGrowDelta;
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while (iIndex >= dwNewArraySize)
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dwNewArraySize += dwGrowDelta;
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T *pTmpArray = new T[dwNewArraySize];
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if (pTmpArray == NULL)
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return DDERR_OUTOFMEMORY;
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memset(pTmpArray, 0, sizeof(T) * dwNewArraySize);
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if (m_pArray != NULL)
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{
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_ASSERT(m_dwArraySize != 0,
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"CheckAndGrow: Array size cannot be NULL" );
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// Copy existing stuff into new array
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memcpy(pTmpArray, m_pArray, m_dwArraySize * sizeof(T));
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// Free up existing array
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delete m_pArray;
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}
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// Assign new array
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m_pArray = pTmpArray;
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m_dwArraySize = dwNewArraySize;
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}
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return D3D_OK;
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}
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template <class T> HRESULT
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TemplArray< T >::CheckRange( DWORD iIndex )
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{
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if (iIndex >= m_dwArraySize)
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{
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return DDERR_INVALIDPARAMS;
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}
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return D3D_OK;
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}
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#endif _TEMPLARR_HPP
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