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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtQml 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 The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/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 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QV4STRING_H
#define QV4STRING_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QtCore/qstring.h>
#include "qv4managed_p.h"
QT_BEGIN_NAMESPACE
namespace QV4 {
struct ExecutionEngine;
struct Identifier;
namespace Heap {
#ifndef V4_BOOTSTRAP
struct Q_QML_PRIVATE_EXPORT String : Base {
enum StringType {
StringType_Unknown,
StringType_Regular,
StringType_ArrayIndex
};
String(MemoryManager *mm, const QString &text);
String(MemoryManager *mm, String *l, String *n);
~String() {
if (!largestSubLength && !text->ref.deref())
QStringData::deallocate(text);
}
void simplifyString() const;
int length() const {
Q_ASSERT((largestSubLength &&
(len == left->len + right->len)) ||
len == (uint)text->size);
return len;
}
std::size_t retainedTextSize() const {
return largestSubLength ? 0 : (std::size_t(text->size) * sizeof(QChar));
}
void createHashValue() const;
inline unsigned hashValue() const {
if (subtype == StringType_Unknown)
createHashValue();
Q_ASSERT(!largestSubLength);
return stringHash;
}
inline QString toQString() const {
if (largestSubLength)
simplifyString();
QStringDataPtr ptr = { text };
text->ref.ref();
return QString(ptr);
}
inline bool isEqualTo(const String *other) const {
if (this == other)
return true;
if (hashValue() != other->hashValue())
return false;
Q_ASSERT(!largestSubLength);
if (identifier && identifier == other->identifier)
return true;
if (subtype == Heap::String::StringType_ArrayIndex && other->subtype == Heap::String::StringType_ArrayIndex)
return true;
return toQString() == other->toQString();
}
union {
mutable QStringData *text;
mutable String *left;
};
union {
mutable Identifier *identifier;
mutable String *right;
};
mutable uint subtype;
mutable uint stringHash;
mutable uint largestSubLength;
uint len;
MemoryManager *mm;
private:
static void append(const String *data, QChar *ch);
};
#endif
}
struct Q_QML_PRIVATE_EXPORT String : public Managed {
#ifndef V4_BOOTSTRAP
V4_MANAGED(String, Managed)
Q_MANAGED_TYPE(String)
V4_NEEDS_DESTROY
enum {
IsString = true
};
uchar subtype() const { return d()->subtype; }
void setSubtype(uchar subtype) const { d()->subtype = subtype; }
bool equals(String *other) const {
return d()->isEqualTo(other->d());
}
inline bool isEqualTo(const String *other) const {
return d()->isEqualTo(other->d());
}
inline bool compare(const String *other) {
return toQString() < other->toQString();
}
inline QString toQString() const {
return d()->toQString();
}
inline unsigned hashValue() const {
return d()->hashValue();
}
uint asArrayIndex() const {
if (subtype() == Heap::String::StringType_Unknown)
d()->createHashValue();
Q_ASSERT(!d()->largestSubLength);
if (subtype() == Heap::String::StringType_ArrayIndex)
return d()->stringHash;
return UINT_MAX;
}
uint toUInt(bool *ok) const;
void makeIdentifier(ExecutionEngine *e) const {
if (d()->identifier)
return;
makeIdentifierImpl(e);
}
void makeIdentifierImpl(ExecutionEngine *e) const;
static uint createHashValue(const QChar *ch, int length);
static uint createHashValue(const char *ch, int length);
bool startsWithUpper() const {
const String::Data *l = d();
while (l->largestSubLength)
l = l->left;
return l->text->size && QChar::isUpper(l->text->data()[0]);
}
Identifier *identifier() const { return d()->identifier; }
protected:
static void markObjects(Heap::Base *that, ExecutionEngine *e);
static bool isEqualTo(Managed *that, Managed *o);
static uint getLength(const Managed *m);
#endif
public:
static uint toArrayIndex(const QString &str);
};
template<>
inline const String *Value::as() const {
return isManaged() && m() && m()->vtable()->isString ? static_cast<const String *>(this) : 0;
}
#ifndef V4_BOOTSTRAP
template<>
inline ReturnedValue value_convert<String>(ExecutionEngine *e, const Value &v)
{
return v.toString(e)->asReturnedValue();
}
#endif
}
QT_END_NAMESPACE
#endif
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