diff options
Diffstat (limited to 'src/qml/qml/v4vm/qv4identifier_p.h')
-rw-r--r-- | src/qml/qml/v4vm/qv4identifier_p.h | 111 |
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 |