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 44namespace WebCore { 45 46FileWriterBase::~FileWriterBase() 47{ 48} 49 50void 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 58FileWriterBase::FileWriterBase() 59 : m_position(0) 60{ 61} 62 63void 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