1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CHROME_FRAME_STREAM_IMPL_H_ 6 #define CHROME_FRAME_STREAM_IMPL_H_ 7 8 #include <atlbase.h> 9 #include <atlcom.h> 10 11 #include "base/win/scoped_comptr.h" 12 13 // A generic base class for IStream implementation. If provided 14 // with a delegate, it delegated calls to it otherwise can be 15 // used a as a base class for an IStream implementation. 16 class StreamImpl : public IStream { 17 public: StreamImpl()18 StreamImpl() {} 19 20 void Initialize(IStream* delegate); 21 22 STDMETHOD(Write)(const void * buffer, ULONG size, ULONG* size_written); 23 STDMETHOD(Read)(void* pv, ULONG cb, ULONG* read); 24 STDMETHOD(Seek)(LARGE_INTEGER move, DWORD origin, ULARGE_INTEGER* new_pos); 25 STDMETHOD(SetSize)(ULARGE_INTEGER new_size); 26 STDMETHOD(CopyTo)(IStream* stream, ULARGE_INTEGER cb, ULARGE_INTEGER* read, 27 ULARGE_INTEGER* written); 28 STDMETHOD(Commit)(DWORD flags); 29 STDMETHOD(Revert)(); 30 STDMETHOD(LockRegion)(ULARGE_INTEGER offset, ULARGE_INTEGER cb, 31 DWORD type); 32 STDMETHOD(UnlockRegion)(ULARGE_INTEGER offset, ULARGE_INTEGER cb, 33 DWORD type); 34 STDMETHOD(Stat)(STATSTG* statstg, DWORD flag); 35 STDMETHOD(Clone)(IStream** stream); 36 37 protected: 38 base::win::ScopedComPtr<IStream> delegate_; 39 40 private: 41 DISALLOW_COPY_AND_ASSIGN(StreamImpl); 42 }; 43 44 #endif // CHROME_FRAME_STREAM_IMPL_H_ 45