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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: | |
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_ | |
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