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 "FileWriterSync.h"
36
37 #include "AsyncFileWriter.h"
38 #include "Blob.h"
39 #include "FileException.h"
40
41 namespace WebCore {
42
write(Blob * data,ExceptionCode & ec)43 void FileWriterSync::write(Blob* data, ExceptionCode& ec)
44 {
45 ASSERT(writer());
46 ASSERT(m_complete);
47 ec = 0;
48 if (!data) {
49 ec = FileException::TYPE_MISMATCH_ERR;
50 return;
51 }
52
53 prepareForWrite();
54 writer()->write(position(), data);
55 writer()->waitForOperationToComplete();
56 ASSERT(m_complete);
57 ec = FileException::ErrorCodeToExceptionCode(m_error);
58 if (ec)
59 return;
60 setPosition(position() + data->size());
61 if (position() > length())
62 setLength(position());
63 }
64
seek(long long position,ExceptionCode & ec)65 void FileWriterSync::seek(long long position, ExceptionCode& ec)
66 {
67 ASSERT(writer());
68 ASSERT(m_complete);
69 ec = 0;
70 seekInternal(position);
71 }
72
truncate(long long offset,ExceptionCode & ec)73 void FileWriterSync::truncate(long long offset, ExceptionCode& ec)
74 {
75 ASSERT(writer());
76 ASSERT(m_complete);
77 ec = 0;
78 if (offset < 0) {
79 ec = FileException::INVALID_STATE_ERR;
80 return;
81 }
82 prepareForWrite();
83 writer()->truncate(offset);
84 writer()->waitForOperationToComplete();
85 ASSERT(m_complete);
86 ec = FileException::ErrorCodeToExceptionCode(m_error);
87 if (ec)
88 return;
89 if (offset < position())
90 setPosition(offset);
91 setLength(offset);
92 }
93
didWrite(long long bytes,bool complete)94 void FileWriterSync::didWrite(long long bytes, bool complete)
95 {
96 ASSERT(m_error == FileError::OK);
97 ASSERT(!m_complete);
98 #ifndef NDEBUG
99 m_complete = complete;
100 #else
101 ASSERT_UNUSED(complete, complete);
102 #endif
103 }
104
didTruncate()105 void FileWriterSync::didTruncate()
106 {
107 ASSERT(m_error == FileError::OK);
108 ASSERT(!m_complete);
109 #ifndef NDEBUG
110 m_complete = true;
111 #endif
112 }
113
didFail(FileError::ErrorCode error)114 void FileWriterSync::didFail(FileError::ErrorCode error)
115 {
116 ASSERT(m_error == FileError::OK);
117 m_error = error;
118 ASSERT(!m_complete);
119 #ifndef NDEBUG
120 m_complete = true;
121 #endif
122 }
123
FileWriterSync()124 FileWriterSync::FileWriterSync()
125 : m_error(FileError::OK)
126 #ifndef NDEBUG
127 , m_complete(true)
128 #endif
129 {
130 }
131
prepareForWrite()132 void FileWriterSync::prepareForWrite()
133 {
134 ASSERT(m_complete);
135 m_error = FileError::OK;
136 #ifndef NDEBUG
137 m_complete = false;
138 #endif
139 }
140
~FileWriterSync()141 FileWriterSync::~FileWriterSync()
142 {
143 }
144
145
146 } // namespace WebCore
147
148 #endif // ENABLE(FILE_SYSTEM)
149