1/*
2 * Copyright (C) 2009 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#include "SQLiteFileSystem.h"
33
34#include "FileSystem.h"
35#include "SQLiteDatabase.h"
36#include "SQLiteStatement.h"
37#include <sqlite3.h>
38
39namespace WebCore {
40
41SQLiteFileSystem::SQLiteFileSystem()
42{
43}
44
45void SQLiteFileSystem::registerSQLiteVFS()
46{
47}
48
49int SQLiteFileSystem::openDatabase(const String& fileName, sqlite3** database)
50{
51    // SQLite expects a null terminator on its UTF-16 strings.
52    String path = fileName;
53    return sqlite3_open16(path.charactersWithNullTermination(), database);
54}
55
56String SQLiteFileSystem::getFileNameForNewDatabase(const String& dbDir, const String&,
57                                                   const String&, SQLiteDatabase* db)
58{
59    // try to get the next sequence number from the given database
60    // if we can't get a number, return an empty string
61    SQLiteStatement sequenceStatement(*db, "SELECT seq FROM sqlite_sequence WHERE name='Databases';");
62    if (sequenceStatement.prepare() != SQLResultOk)
63        return String();
64    int result = sequenceStatement.step();
65    int64_t seq = 0;
66    if (result == SQLResultRow)
67        seq = sequenceStatement.getColumnInt64(0);
68    else if (result != SQLResultDone)
69        return String();
70    sequenceStatement.finalize();
71
72    // increment the number until we can use it to form a file name that doesn't exist
73    String fileName;
74    do {
75        ++seq;
76        fileName = pathByAppendingComponent(dbDir, String::format("%016llx.db", seq));
77    } while (fileExists(fileName));
78
79    return String::format("%016llx.db", seq);
80}
81
82String SQLiteFileSystem::appendDatabaseFileNameToPath(const String& path, const String& fileName)
83{
84    return pathByAppendingComponent(path, fileName);
85}
86
87bool SQLiteFileSystem::ensureDatabaseDirectoryExists(const String& path)
88{
89    if (path.isEmpty())
90        return false;
91    return makeAllDirectories(path);
92}
93
94bool SQLiteFileSystem::ensureDatabaseFileExists(const String& fileName, bool checkPathOnly)
95{
96    if (fileName.isEmpty())
97        return false;
98
99    if (checkPathOnly) {
100        String dir = directoryName(fileName);
101        return ensureDatabaseDirectoryExists(dir);
102    }
103
104    return fileExists(fileName);
105}
106
107bool SQLiteFileSystem::deleteEmptyDatabaseDirectory(const String& path)
108{
109    return deleteEmptyDirectory(path);
110}
111
112bool SQLiteFileSystem::deleteDatabaseFile(const String& fileName)
113{
114    return deleteFile(fileName);
115}
116
117long long SQLiteFileSystem::getDatabaseFileSize(const String& fileName)
118{
119    long long size;
120    return getFileSize(fileName, size) ? size : 0;
121}
122
123} // namespace WebCore
124