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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_FRAME_STREAM_IMPL_H_
#define CHROME_FRAME_STREAM_IMPL_H_
#include <atlbase.h>
#include <atlcom.h>
#include "base/win/scoped_comptr.h"
// A generic base class for IStream implementation. If provided
// with a delegate, it delegated calls to it otherwise can be
// used a as a base class for an IStream implementation.
class StreamImpl : public IStream {
public:
StreamImpl() {}
void Initialize(IStream* delegate);
STDMETHOD(Write)(const void * buffer, ULONG size, ULONG* size_written);
STDMETHOD(Read)(void* pv, ULONG cb, ULONG* read);
STDMETHOD(Seek)(LARGE_INTEGER move, DWORD origin, ULARGE_INTEGER* new_pos);
STDMETHOD(SetSize)(ULARGE_INTEGER new_size);
STDMETHOD(CopyTo)(IStream* stream, ULARGE_INTEGER cb, ULARGE_INTEGER* read,
ULARGE_INTEGER* written);
STDMETHOD(Commit)(DWORD flags);
STDMETHOD(Revert)();
STDMETHOD(LockRegion)(ULARGE_INTEGER offset, ULARGE_INTEGER cb,
DWORD type);
STDMETHOD(UnlockRegion)(ULARGE_INTEGER offset, ULARGE_INTEGER cb,
DWORD type);
STDMETHOD(Stat)(STATSTG* statstg, DWORD flag);
STDMETHOD(Clone)(IStream** stream);
protected:
base::win::ScopedComPtr<IStream> delegate_;
private:
DISALLOW_COPY_AND_ASSIGN(StreamImpl);
};
#endif // CHROME_FRAME_STREAM_IMPL_H_
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