cpgpdata.h

PGP8.0源码 请认真阅读您的文件包然后写出其具体功能

/*____________________________________________________________________________
		Copyright (C) 2002 PGP Corporation
        All rights reserved.

        $Id: CPGPData.h,v 1.2 2002/08/06 20:10:19 dallen Exp $
____________________________________________________________________________*/

#ifndef Included_CPGPData_h	// [
#define Included_CPGPData_h

#include "pgpUtilities.h"

_PGP_BEGIN

// Class CPGPData

class CPGPData
{
	NOT_COPYABLE(CPGPData)

public:
	CPGPData();
	CPGPData(void *pData, PGPSize size, PGPBoolean weDealloc = FALSE);
	CPGPData(PGPContextRef context, PGPSize size);

	~CPGPData();

	void *			Get() {return mData;}
	const void *	Get() const {return mData;}

	PGPBoolean	WeAllocated() const {return mWeAllocated;}
	PGPSize		Size() const {return mSize;}

	void	Allocate(PGPContextRef context, PGPSize size);
	void	Attach(void *pData, PGPSize size, PGPBoolean weDealloc = FALSE);
	void	Clear();

private:
	PGPBoolean	mWeAllocated;

	void	*mData;
	PGPSize	mSize;
};


// Class CPGPData member functions

inline 
CPGPData::CPGPData() : mWeAllocated(FALSE), mData(NULL), mSize(0)
{
}

inline 
CPGPData::CPGPData(void *pData, PGPSize size, PGPBoolean weDealloc) 
	: mWeAllocated(FALSE), mData(NULL), mSize(0)
{
	Attach(pData, size, weDealloc);
}

inline 
CPGPData::CPGPData(PGPContextRef context, PGPSize size) 
	: mWeAllocated(FALSE), mData(NULL), mSize(0)
{
	Allocate(context, size);
}

inline 
CPGPData::~CPGPData()
{
	try
	{
		Clear();
	}
	catch (CComboError&) { }
}

inline 
void 
CPGPData::Allocate(PGPContextRef context, PGPSize size)
{
	pgpAssert(PGPContextRefIsValid(context));

	void	*pData	= PGPNewData(PGPPeekContextMemoryMgr(context), size, 
		NULL);

	if (IsNull(pData))
		THROW_PGPERROR(kPGPError_OutOfMemory);

	Clear();

	mWeAllocated = TRUE;
	mData = pData;
	mSize = size;
}

inline 
void 
CPGPData::Attach(void *pData, PGPSize size, PGPBoolean weDealloc)
{
	pgpAssertAddrValid(pData, VoidAlign);
	Clear();

	mWeAllocated = weDealloc;
	mData = pData;
	mSize = size;
}

inline 
void 
CPGPData::Clear()
{
	if (WeAllocated())
		PGPFreeData(mData);

	mWeAllocated = FALSE;
	mData = NULL;
	mSize = 0;
}

_PGP_END

#endif	// ] Included_CPGPData_h