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// AutoBuffer.cpp: implementation of the CAutoBuffer class.
//
////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2000 Tadeusz Dracz.
////////////////////////////////////////////////////////////////////////////////
#include "stdafx.h"
#include "AutoBuffer.h"
#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
CAutoBuffer::CAutoBuffer()
{
m_iSize = 0;
m_pBuffer = NULL;
}
CAutoBuffer::CAutoBuffer(DWORD iSize, bool bZeroMemory)
{
m_iSize = 0;
m_pBuffer = NULL;
Allocate(iSize, bZeroMemory);
}
CAutoBuffer::~CAutoBuffer()
{
Release();
}
bool CAutoBuffer::IsAllocated()
{
return (m_pBuffer != NULL);
}
DWORD CAutoBuffer::GetSize()
{
return m_iSize;
}
void CAutoBuffer::Release()
{
if (m_pBuffer)
{
delete [] m_pBuffer;
m_iSize = 0;
m_pBuffer = NULL;
}
}
char* CAutoBuffer::Allocate(DWORD iSize, bool bZeroMemory)
{
if (iSize != m_iSize)
Release();
else
{
if (bZeroMemory)
memset(m_pBuffer, 0, iSize); // zerowanie bufora
return m_pBuffer;
}
if (iSize > 0)
{
// try
// {
m_pBuffer = new char [iSize];
m_iSize = iSize;
// }
// catch (CMemoryException *e)
// {
// e->Delete();
// return NULL;
// }
}
else
m_pBuffer = NULL;
return m_pBuffer;
}
CAutoBuffer::operator char*()
{
return m_pBuffer;
}
CAutoBuffer::CAutoBuffer(CAutoBuffer& buffer)
{
m_pBuffer = NULL;
m_iSize = 0;
if (buffer.m_pBuffer)
{
Allocate(buffer.m_iSize);
memcpy(m_pBuffer, buffer.m_pBuffer, buffer.m_iSize);
}
}
CAutoBuffer& CAutoBuffer::operator=(const CAutoBuffer& buffer)
{
if (this == &buffer)
return *this;
Release();
if (buffer.m_pBuffer)
{
Allocate(buffer.m_iSize);
memcpy(m_pBuffer, buffer.m_pBuffer, buffer.m_iSize);
}
return *this;
}
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