mgctstorage.inl

《3D游戏引擎设计》的源码

// Magic Software, Inc.
// http://www.magic-software.com
// Copyright (c) 2000, All Rights Reserved
//
// Source code from Magic Software is supplied under the terms of a license
// agreement and may not be copied or disclosed except in accordance with the
// terms of that agreement.  The various license agreements may be found at
// the Magic Software web site.  This file is subject to the license
//
// FREE SOURCE CODE
// http://www.magic-software.com/License/free.pdf

//----------------------------------------------------------------------------
template <class T>
MgcTStorage<T>::MgcTStorage ()
{
    m_atStorage = 0;
}
//----------------------------------------------------------------------------
template <class T>
MgcTStorage<T>::MgcTStorage (unsigned int uiQuantity)
{
    if ( uiQuantity > 0 )
        m_atStorage = new T[uiQuantity];
    else
        m_atStorage = 0;
}
//----------------------------------------------------------------------------
template <class T>
MgcTStorage<T>::MgcTStorage (T* atStorage)
{
    m_atStorage = atStorage;
}
//----------------------------------------------------------------------------
template <class T>
MgcTStorage<T>::~MgcTStorage ()
{
    delete[] m_atStorage;
}
//----------------------------------------------------------------------------
template <class T>
T* MgcTStorage<T>::GetStorage () const
{
    return m_atStorage;
}
//----------------------------------------------------------------------------
template <class T>
T& MgcTStorage<T>::operator[] (unsigned int uiIndex) const
{
    assert( m_atStorage );
    return m_atStorage[uiIndex];
}
//----------------------------------------------------------------------------
template <class T>
void MgcTStorage<T>::Resize (unsigned int uiOldQuantity,
    unsigned int uiNewQuantity, bool bCopy)
{
    if ( uiNewQuantity != uiOldQuantity )
    {
        if ( uiNewQuantity > 0 )
        {
            T* atNewStorage = new T[uiNewQuantity];

            if ( bCopy )
            {
                if ( uiNewQuantity > uiOldQuantity )
                {
                    if ( uiOldQuantity > 0 )
                    {
                        unsigned int uiCopySize = uiOldQuantity*sizeof(T);
                        memcpy(atNewStorage,m_atStorage,uiCopySize);
                    }
                }
                else
                {
                    memcpy(atNewStorage,m_atStorage,uiNewQuantity*sizeof(T));
                }
            }

            delete[] m_atStorage;
            m_atStorage = atNewStorage;
        }
        else
        {
            delete[] m_atStorage;
            m_atStorage = 0;
        }
    }
}
//----------------------------------------------------------------------------