124 lines
3 KiB
C
124 lines
3 KiB
C
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/*--------------------------------------------------------------------------*
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*
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* Microsoft Windows
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* Copyright (C) Microsoft Corporation, 1999 - 1999
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*
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* File: serial.h
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*
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* Contents: Object serialization class definitions
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*
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* History: 11-Feb-99 vivekj Created
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*
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*--------------------------------------------------------------------------*/
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#pragma once
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#ifndef SERIAL_H
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#define SERIAL_H
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/*+-------------------------------------------------------------------------*
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* class CSerialObject
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*
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*
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* PURPOSE: Base class for objects that can be serialized.
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*
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*+-------------------------------------------------------------------------*/
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class CSerialObject
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{
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public:
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HRESULT Read (IStream &stm);
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protected: // implemented by the derived class
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// virtual CStr GetName() =0;
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virtual UINT GetVersion() =0;
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// return values for ReadSerialObject: S_OK: succeeded, S_FALSE: unknown version
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// E_UNEXPECTED: catastrophic error.
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virtual HRESULT ReadSerialObject (IStream &stm, UINT nVersion /*,LARGE_INTEGER nBytes*/) = 0;
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};
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/*+-------------------------------------------------------------------------*
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* class CSerialObjectRW
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*
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*
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* PURPOSE: Provided to separate from CSerialObject the "Write" functionality
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* which is much less frequently used
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*
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*+-------------------------------------------------------------------------*/
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class CSerialObjectRW : public CSerialObject
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{
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public:
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HRESULT Write(IStream &stm);
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protected: // implemented by the derived class
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virtual HRESULT WriteSerialObject(IStream &stm) = 0;
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};
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//############################################################################
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//############################################################################
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//
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// template functions - std::list class
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//
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//############################################################################
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//############################################################################
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template<class T, class Al>
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HRESULT Read(IStream& stm, std::list<T, Al>& l)
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{
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HRESULT hr = S_OK;
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try
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{
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int cSize;
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stm >> cSize;
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for(int i=0 ; i<cSize; i++)
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{
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T t;
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hr = t.Read(stm); // read the underlying object
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BREAK_ON_FAIL (hr);
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l.push_back(t); // add it to the list
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}
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}
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catch (_com_error& err)
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{
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hr = err.Error();
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ASSERT (false && "Caught _com_error");
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}
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return (hr);
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}
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template<class T, class Al>
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HRESULT Write(IStream& stm, std::list<T, Al>& l)
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{
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HRESULT hr = S_OK;
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try
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{
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int cSize = l.size();
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// write out the length
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stm << cSize;
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// write out the members
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for(std::list<T, Al>::iterator it = l.begin(); it != l.end(); ++it)
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{
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hr = it->Write (stm);
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BREAK_ON_FAIL (hr);
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}
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}
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catch (_com_error& err)
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{
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hr = err.Error();
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ASSERT (false && "Caught _com_error");
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}
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return (hr);
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}
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#endif // SERIAL_H
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