windows-nt/Source/XPSP1/NT/termsrv/admtools/tscc/snapin/tarray.cpp

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2020-09-26 03:20:57 -05:00
//Copyright (c) 1998 - 1999 Microsoft Corporation
#include "stdafx.h"
#include"tarray.h"
//------------------------------------------------------------------------
template< class T > CArrayT< T >::CArrayT( )
{
m_pT = NULL;
m_nMaxSize = 0;
m_idx = 0;
}
//------------------------------------------------------------------------
// destroy the list
template< class T > CArrayT< T >::~CArrayT( )
{
if( m_pT != NULL )
{
delete[] m_pT;
}
}
//------------------------------------------------------------------------
// increases array size, returns zero if the operation failed
template< class T > int CArrayT< T >::GrowBy( int iSize )
{
if( iSize == 0 )
{
//
//Grow by # number of items
//
iSize = 4;
}
if( m_pT == NULL )
{
m_pT = ( T * )new T[ iSize ];
if( m_pT == NULL )
{
return 0;
}
m_nMaxSize = iSize;
m_idx = 0;
}
else
{
T *pT;
m_nMaxSize += iSize;
pT = ( T * )new T[ m_nMaxSize ];
if( pT == NULL )
{
return 0;
}
ZeroMemory( ( PVOID )pT , sizeof( T ) * m_nMaxSize );
CopyMemory( pT , m_pT , sizeof( T ) * ( m_idx ) );
if( m_pT != NULL )
{
delete[] m_pT;
}
m_pT = pT;
}
return m_nMaxSize;
}
//------------------------------------------------------------------------
// Simply put, increase the array size if empty, and place item at the
// end of the list
template< class T > int CArrayT< T >::Insert( T tItem )
{
if( m_pT == NULL || ( m_idx ) >= m_nMaxSize )
{
if( GrowBy( 0 ) == 0 )
{
return 0;
}
}
m_pT[ m_idx ] = tItem;
m_idx++;
return m_idx;
}
//------------------------------------------------------------------------
// exposes the array for direct reference
template< class T > T* CArrayT< T >::ExposeArray( )
{
return &m_pT[0];
}
//------------------------------------------------------------------------
// Returns the number of valid entries in the array
template< class T > int CArrayT< T >::GetSize( ) const
{
return ( m_idx );
}