//**************************************************************************************
// Filename:	CBuffer.cp
// Copyright © 1999-2003 Abracode, Inc. All rights reserved.
//
// Description:	
//
//**************************************************************************************
// Revision History:
// Sunday, June 13, 1999 - Original
//Oct 17, 2003 removed dependency on PP
//**************************************************************************************

#include "CBuffer.h"
#include "CThrownResult.h"

CBuffer::CBuffer()
{
	mBufferH = NULL;
	mBufferSize = 0;
	mDataLen = 0;
}

CBuffer::~CBuffer()
{
	Free();
}

Ptr
CBuffer::GetBufferPtr() //automatically re-alloacteas and re-locks itself when needed
{
	Restore();

	if( !mIsLocked )
	{
		::HLockHi(mBufferH);
		CThrownOSErr err = ::MemError();
		mIsLocked = true;
	}

	return *mBufferH;
}

void
CBuffer::Free()
{
	if(mBufferH != NULL)
		::DisposeHandle(mBufferH);
	mBufferH = NULL;
	mIsLocked = false;
	mDataLen = 0;
}

void
CBuffer::Restore()
{
	if(mBufferH == NULL)
	{
		mBufferH = ::NewHandleClear( mBufferSize );
		if(mBufferH == NULL)
			CThrownOSErr err = memFullErr;
		mIsLocked = false;
	}
}