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