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