1 /* 2 * Copyright (C) 2006, 2007 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef MemoryStream_H 27 #define MemoryStream_H 28 29 #include <objidl.h> 30 31 #include <WebCore/COMPtr.h> 32 #include <WebCore/SharedBuffer.h> 33 #include <WTF/PassRefPtr.h> 34 #include <WTF/RefPtr.h> 35 36 class MemoryStream : public IStream 37 { 38 public: 39 static COMPtr<MemoryStream> createInstance(PassRefPtr<WebCore::SharedBuffer> buffer); 40 41 protected: 42 MemoryStream(PassRefPtr<WebCore::SharedBuffer> buffer); 43 ~MemoryStream(); 44 public: 45 46 // IUnknown 47 virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void** ppvObject); 48 virtual ULONG STDMETHODCALLTYPE AddRef(void); 49 virtual ULONG STDMETHODCALLTYPE Release(void); 50 51 // ISequentialStream 52 virtual /* [local] */ HRESULT STDMETHODCALLTYPE Read( 53 /* [length_is][size_is][out] */ void* pv, 54 /* [in] */ ULONG cb, 55 /* [out] */ ULONG* pcbRead); 56 57 virtual /* [local] */ HRESULT STDMETHODCALLTYPE Write( 58 /* [size_is][in] */ const void* pv, 59 /* [in] */ ULONG cb, 60 /* [out] */ ULONG* pcbWritten); 61 62 // IStream 63 virtual /* [local] */ HRESULT STDMETHODCALLTYPE Seek( 64 /* [in] */ LARGE_INTEGER dlibMove, 65 /* [in] */ DWORD dwOrigin, 66 /* [out] */ ULARGE_INTEGER* plibNewPosition); 67 68 virtual HRESULT STDMETHODCALLTYPE SetSize( 69 /* [in] */ ULARGE_INTEGER libNewSize); 70 71 virtual /* [local] */ HRESULT STDMETHODCALLTYPE CopyTo( 72 /* [unique][in] */ IStream* pstm, 73 /* [in] */ ULARGE_INTEGER cb, 74 /* [out] */ ULARGE_INTEGER* pcbRead, 75 /* [out] */ ULARGE_INTEGER* pcbWritten); 76 77 virtual HRESULT STDMETHODCALLTYPE Commit( 78 /* [in] */ DWORD grfCommitFlags); 79 80 virtual HRESULT STDMETHODCALLTYPE Revert( void); 81 82 virtual HRESULT STDMETHODCALLTYPE LockRegion( 83 /* [in] */ ULARGE_INTEGER libOffset, 84 /* [in] */ ULARGE_INTEGER cb, 85 /* [in] */ DWORD dwLockType); 86 87 virtual HRESULT STDMETHODCALLTYPE UnlockRegion( 88 /* [in] */ ULARGE_INTEGER libOffset, 89 /* [in] */ ULARGE_INTEGER cb, 90 /* [in] */ DWORD dwLockType); 91 92 virtual HRESULT STDMETHODCALLTYPE Stat( 93 /* [out] */ STATSTG* pstatstg, 94 /* [in] */ DWORD grfStatFlag); 95 96 virtual HRESULT STDMETHODCALLTYPE Clone( 97 /* [out] */ IStream** ppstm); 98 99 protected: 100 ULONG m_refCount; 101 RefPtr<WebCore::SharedBuffer> m_buffer; 102 size_t m_pos; 103 }; 104 105 #endif 106
