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 #include "config.h" 32 33 #if ENABLE(FILE_SYSTEM) 34 35 #include "FileWriterBase.h" 36 37 #include "AsyncFileWriter.h" 38 #include "Blob.h" 39 #include "ExceptionCode.h" 40 #include "FileError.h" 41 #include "FileException.h" 42 #include "ProgressEvent.h" 43 44 namespace WebCore { 45 46 FileWriterBase::~FileWriterBase() 47 { 48 } 49 50 void FileWriterBase::initialize(PassOwnPtr<AsyncFileWriter> writer, long long length) 51 { 52 ASSERT(!m_writer); 53 ASSERT(length >= 0); 54 m_writer = writer; 55 m_length = length; 56 } 57 58 FileWriterBase::FileWriterBase() 59 : m_position(0) 60 { 61 } 62 63 void FileWriterBase::seekInternal(long long position) 64 { 65 if (position > m_length) 66 position = m_length; 67 else if (position < 0) 68 position = m_length + position; 69 if (position < 0) 70 position = 0; 71 m_position = position; 72 } 73 74 } // namespace WebCore 75 76 #endif // ENABLE(FILE_SYSTEM) 77
