1 /* 2 * Copyright (C) 2010 Google 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 are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef AsyncFileStream_h 32 #define AsyncFileStream_h 33 34 #if ENABLE(BLOB) || ENABLE(FILE_SYSTEM) 35 36 #include "FileStreamClient.h" 37 #include <wtf/Forward.h> 38 #include <wtf/RefCounted.h> 39 40 namespace WebCore { 41 42 class KURL; 43 44 class AsyncFileStream : public RefCounted<AsyncFileStream> { 45 public: 46 virtual ~AsyncFileStream() { } 47 48 virtual void getSize(const String& path, double expectedModificationTime) = 0; 49 virtual void openForRead(const String& path, long long offset, long long length) = 0; 50 virtual void openForWrite(const String& path) = 0; 51 virtual void close() = 0; 52 virtual void read(char* buffer, int length) = 0; 53 virtual void write(const KURL& blobURL, long long position, int length) = 0; 54 virtual void truncate(long long position) = 0; 55 virtual void stop() = 0; 56 57 FileStreamClient* client() const { return m_client; } 58 void setClient(FileStreamClient* client) { m_client = client; } 59 60 protected: 61 AsyncFileStream(FileStreamClient* client) 62 : m_client(client) 63 { 64 } 65 66 private: 67 FileStreamClient* m_client; 68 }; 69 70 } // namespace WebCore 71 72 #endif // ENABLE(BLOB) || ENABLE(FILE_SYSTEM) 73 74 #endif // AsyncFileStream_h 75
