webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

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diff --git a/Source/WebCore/Modules/indexeddb/server/SQLiteIDBCursor.h b/Source/WebCore/Modules/indexeddb/server/SQLiteIDBCursor.h
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+++ b/Source/WebCore/Modules/indexeddb/server/SQLiteIDBCursor.h
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+/*
+ * Copyright (C) 2014, 2016 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#if ENABLE(INDEXED_DATABASE)
+
+#include "IDBCursorRecord.h"
+#include "IDBIndexInfo.h"
+#include "IDBKeyData.h"
+#include "IDBKeyRangeData.h"
+#include "IDBResourceIdentifier.h"
+#include "IDBValue.h"
+#include "SQLiteStatement.h"
+#include <wtf/Deque.h>
+#include <wtf/Noncopyable.h>
+
+namespace WebCore {
+
+class IDBCursorInfo;
+class IDBGetResult;
+
+namespace IDBServer {
+
+class SQLiteIDBTransaction;
+
+class SQLiteIDBCursor {
+    WTF_MAKE_NONCOPYABLE(SQLiteIDBCursor);
+public:
+    static std::unique_ptr<SQLiteIDBCursor> maybeCreate(SQLiteIDBTransaction&, const IDBCursorInfo&);
+    static std::unique_ptr<SQLiteIDBCursor> maybeCreateBackingStoreCursor(SQLiteIDBTransaction&, const uint64_t objectStoreIdentifier, const uint64_t indexIdentifier, const IDBKeyRangeData&);
+
+    SQLiteIDBCursor(SQLiteIDBTransaction&, const IDBCursorInfo&);
+    SQLiteIDBCursor(SQLiteIDBTransaction&, uint64_t objectStoreID, uint64_t indexID, const IDBKeyRangeData&);
+
+    ~SQLiteIDBCursor();
+
+    const IDBResourceIdentifier& identifier() const { return m_cursorIdentifier; }
+    SQLiteIDBTransaction* transaction() const { return m_transaction; }
+
+    int64_t objectStoreID() const { return m_objectStoreID; }
+    int64_t currentRecordRowID() const;
+
+    const IDBKeyData& currentKey() const;
+    const IDBKeyData& currentPrimaryKey() const;
+    IDBValue* currentValue() const;
+
+    bool advance(uint64_t count);
+    bool iterate(const IDBKeyData& targetKey, const IDBKeyData& targetPrimaryKey);
+    bool prefetch();
+
+    bool didComplete() const;
+    bool didError() const;
+
+    void objectStoreRecordsChanged();
+
+    void currentData(IDBGetResult&);
+
+private:
+    bool establishStatement();
+    bool createSQLiteStatement(const String& sql);
+    bool bindArguments();
+
+    void resetAndRebindStatement();
+
+    enum class FetchResult {
+        Success,
+        Failure,
+        ShouldFetchAgain
+    };
+
+    bool fetch();
+
+    struct SQLiteCursorRecord {
+        IDBCursorRecord record;
+        bool completed { false };
+        bool errored { false };
+        int64_t rowID { 0 };
+        bool isTerminalRecord() const { return completed || errored; }
+    };
+    bool fetchNextRecord(SQLiteCursorRecord&);
+    FetchResult internalFetchNextRecord(SQLiteCursorRecord&);
+
+    void markAsErrored(SQLiteCursorRecord&);
+
+    SQLiteIDBTransaction* m_transaction;
+    IDBResourceIdentifier m_cursorIdentifier;
+    int64_t m_objectStoreID;
+    int64_t m_indexID { IDBIndexInfo::InvalidId };
+    IndexedDB::CursorDirection m_cursorDirection { IndexedDB::CursorDirection::Next };
+    IndexedDB::CursorType m_cursorType;
+    IDBKeyRangeData m_keyRange;
+
+    IDBKeyData m_currentLowerKey;
+    IDBKeyData m_currentUpperKey;
+
+    Deque<SQLiteCursorRecord> m_fetchedRecords;
+    IDBKeyData m_currentKeyForUniqueness;
+
+    std::unique_ptr<SQLiteStatement> m_statement;
+    bool m_statementNeedsReset { true };
+    int64_t m_boundID { 0 };
+
+    bool m_backingStoreCursor { false };
+};
+
+} // namespace IDBServer
+} // namespace WebCore
+
+#endif // ENABLE(INDEXED_DATABASE)