1 files changed, 111 insertions, 0 deletions
diff --git a/src/qml/qml/v4vm/qv4identifier_p.h b/src/qml/qml/v4vm/qv4identifier_p.h
new file mode 100644
index 0000000000..02dd9d5057
--- /dev/null
+++ b/src/qml/qml/v4vm/qv4identifier_p.h
@@ -0,0 +1,111 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the V4VM module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#ifndef QV4IDENTIFIER_H
+#define QV4IDENTIFIER_H
+
+#include "qv4string_p.h"
+#include "qv4engine_p.h"
+#include <limits.h>
+
+QT_BEGIN_NAMESPACE
+
+namespace QQmlJS {
+namespace VM {
+
+struct Identifiers
+{
+    ExecutionEngine *engine;
+    uint currentIndex;
+    QHash<QString, String *> identifiers;
+public:
+
+    Identifiers(ExecutionEngine *engine) : engine(engine), currentIndex(0) {}
+
+    String *insert(const QString &s)
+    {
+        QHash<QString, String*>::const_iterator it = identifiers.find(s);
+        if (it != identifiers.constEnd())
+            return it.value();
+
+        String *str = engine->newString(s);
+        str->createHashValue();
+        if (str->subtype == String::StringType_ArrayIndex)
+            return str;
+
+        str->identifier = currentIndex;
+        if (currentIndex <= USHRT_MAX) {
+            identifiers.insert(s, str);
+            ++currentIndex;
+        }
+        return str;
+    }
+
+    void toIdentifier(String *s) {
+        if (s->identifier != UINT_MAX)
+            return;
+        if (s->subtype == String::StringType_Unknown)
+            s->createHashValue();
+        if (s->subtype == String::StringType_ArrayIndex)
+            return;
+        QHash<QString, String*>::const_iterator it = identifiers.find(s->toQString());
+        if (it != identifiers.constEnd()) {
+            s->identifier = (*it)->identifier;
+            return;
+        }
+        s->identifier = currentIndex;
+        if (currentIndex <= USHRT_MAX) {
+            identifiers.insert(s->toQString(), s);
+            ++currentIndex;
+        }
+    }
+
+    void mark() {
+        for (QHash<QString, String *>::const_iterator it = identifiers.constBegin(); it != identifiers.constEnd(); ++it)
+            (*it)->mark();
+    }
+};
+
+} // namespace VM
+} // namespace QQmlJS
+
+QT_END_NAMESPACE
+
+#endif