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 FileWriterBase_h
32#define FileWriterBase_h
33
34#if ENABLE(FILE_SYSTEM)
35
36#include "AsyncFileWriterClient.h"
37#include <wtf/OwnPtr.h>
38#include <wtf/PassOwnPtr.h>
39#include <wtf/RefCounted.h>
40
41namespace WebCore {
42
43class AsyncFileWriter;
44class Blob;
45
46typedef int ExceptionCode;
47
48class FileWriterBase : public RefCounted<FileWriterBase> {
49public:
50    virtual ~FileWriterBase();
51    void initialize(PassOwnPtr<AsyncFileWriter>, long long length);
52
53    long long position() const
54    {
55        return m_position;
56    }
57    long long length() const
58    {
59        return m_length;
60    }
61
62protected:
63    FileWriterBase();
64
65    AsyncFileWriter* writer()
66    {
67        return m_writer.get();
68    }
69
70    void setPosition(long long position)
71    {
72        m_position = position;
73    }
74
75    void setLength(long long length)
76    {
77        m_length = length;
78    }
79
80    void seekInternal(long long position);
81
82private:
83    friend class WTF::RefCounted<FileWriterBase>;
84
85    OwnPtr<AsyncFileWriter> m_writer;
86    long long m_position;
87    long long m_length;
88};
89
90} // namespace WebCore
91
92#endif // ENABLE(FILE_SYSTEM)
93
94#endif // FileWriterBase_h
95