1 files changed, 403 insertions, 0 deletions
diff --git a/src/qml/jsruntime/qv4value.cpp b/src/qml/jsruntime/qv4value.cpp
new file mode 100644
index 0000000000..a41262f12f
--- /dev/null
+++ b/src/qml/jsruntime/qv4value.cpp
@@ -0,0 +1,403 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** 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 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include <qv4engine_p.h>
+#include <qv4object_p.h>
+#include <qv4objectproto_p.h>
+#include "qv4mm_p.h"
+#include "qv4exception_p.h"
+
+#include <wtf/MathExtras.h>
+
+using namespace QV4;
+
+int Value::toUInt16() const
+{
+    if (isConvertibleToInt())
+        return (ushort)(uint)integerValue();
+
+    double number = __qmljs_to_number(*this);
+
+    double D16 = 65536.0;
+    if ((number >= 0 && number < D16))
+        return static_cast<ushort>(number);
+
+    if (!std::isfinite(number))
+        return +0;
+
+    double d = ::floor(::fabs(number));
+    if (std::signbit(number))
+        d = -d;
+
+    number = ::fmod(d , D16);
+
+    if (number < 0)
+        number += D16;
+
+    return (unsigned short)number;
+}
+
+double Value::toInteger() const
+{
+    if (isConvertibleToInt())
+        return int_32;
+
+    return Value::toInteger(__qmljs_to_number(*this));
+}
+
+double Value::toNumber() const
+{
+    return __qmljs_to_number(*this);
+}
+
+QString Value::toQString() const
+{
+    switch (type()) {
+    case Value::Undefined_Type:
+        return QStringLiteral("undefined");
+    case Value::Null_Type:
+        return QStringLiteral("null");
+    case Value::Boolean_Type:
+        if (booleanValue())
+            return QStringLiteral("true");
+        else
+            return QStringLiteral("false");
+    case Value::String_Type:
+        return stringValue()->toQString();
+    case Value::Object_Type: {
+        ExecutionContext *ctx = objectValue()->internalClass->engine->current;
+        try {
+            Value prim = __qmljs_to_primitive(*this, STRING_HINT);
+            if (prim.isPrimitive())
+                return prim.toQString();
+        } catch (Exception &e) {
+            e.accept(ctx);
+            try {
+                Value prim = __qmljs_to_primitive(e.value(), STRING_HINT);
+                if (prim.isPrimitive())
+                    return prim.toQString();
+            } catch(Exception &e) {
+                e.accept(ctx);
+            }
+        }
+        return QString();
+    }
+    case Value::Integer_Type: {
+        QString str;
+        __qmljs_numberToString(&str, (double)int_32, 10);
+        return str;
+    }
+    default: { // double
+        QString str;
+        __qmljs_numberToString(&str, doubleValue(), 10);
+        return str;
+    }
+    } // switch
+}
+
+bool Value::sameValue(Value other) const {
+    if (val == other.val)
+        return true;
+    if (isString() && other.isString())
+        return stringValue()->isEqualTo(other.stringValue());
+    if (isInteger())
+        return int_32 ? (double(int_32) == other.dbl) : (other.val == 0);
+    if (other.isInteger())
+        return other.int_32 ? (dbl == double(other.int_32)) : (val == 0);
+    return false;
+}
+
+Value Value::fromString(ExecutionContext *ctx, const QString &s)
+{
+    return fromString(ctx->engine->newString(s));
+}
+
+Value Value::fromString(ExecutionEngine *engine, const QString &s)
+{
+    return fromString(engine->newString(s));
+}
+
+
+int Value::toInt32(double number)
+{
+    const double D32 = 4294967296.0;
+    const double D31 = D32 / 2.0;
+
+    if ((number >= -D31 && number < D31))
+        return static_cast<int>(number);
+
+
+    if (!std::isfinite(number))
+        return 0;
+
+    double d = ::floor(::fabs(number));
+    if (std::signbit(number))
+        d = -d;
+
+    number = ::fmod(d , D32);
+
+    if (number < -D31)
+        number += D32;
+    else if (number >= D31)
+        number -= D32;
+
+    return int(number);
+}
+
+unsigned int Value::toUInt32(double number)
+{
+    const double D32 = 4294967296.0;
+    if ((number >= 0 && number < D32))
+        return static_cast<uint>(number);
+
+    if (!std::isfinite(number))
+        return +0;
+
+    double d = ::floor(::fabs(number));
+    if (std::signbit(number))
+        d = -d;
+
+    number = ::fmod(d , D32);
+
+    if (number < 0)
+        number += D32;
+
+    return unsigned(number);
+}
+
+double Value::toInteger(double number)
+{
+    if (std::isnan(number))
+        return +0;
+    else if (! number || std::isinf(number))
+        return number;
+    const double v = floor(fabs(number));
+    return std::signbit(number) ? -v : v;
+}
+
+String *Value::toString(ExecutionContext *ctx) const
+{
+    if (isString())
+        return stringValue();
+    return __qmljs_convert_to_string(ctx, *this);
+}
+
+Value Value::property(ExecutionContext *ctx, String *name) const
+{
+    return isObject() ? objectValue()->get(name) : undefinedValue();
+}
+
+
+PersistentValue::PersistentValue(const Value &val)
+    : d(new PersistentValuePrivate(val))
+{
+}
+
+PersistentValue::PersistentValue(const PersistentValue &other)
+    : d(other.d)
+{
+    if (d)
+        d->ref();
+}
+
+PersistentValue &PersistentValue::operator=(const PersistentValue &other)
+{
+    if (d == other.d)
+        return *this;
+
+    // the memory manager cleans up those with a refcount of 0
+
+    if (d)
+        d->deref();
+    d = other.d;
+    if (d)
+        d->ref();
+
+    return *this;
+}
+
+PersistentValue &PersistentValue::operator =(const Value &other)
+{
+    if (!d) {
+        d = new PersistentValuePrivate(other);
+        return *this;
+    }
+    d = d->detach(other);
+    return *this;
+}
+
+PersistentValue::~PersistentValue()
+{
+    if (d)
+        d->deref();
+}
+
+WeakValue::WeakValue(const Value &val)
+    : d(new PersistentValuePrivate(val, /*engine*/0, /*weak*/true))
+{
+}
+
+WeakValue::WeakValue(const WeakValue &other)
+    : d(other.d)
+{
+    if (d)
+        d->ref();
+}
+
+WeakValue &WeakValue::operator=(const WeakValue &other)
+{
+    if (d == other.d)
+        return *this;
+
+    // the memory manager cleans up those with a refcount of 0
+
+    if (d)
+        d->deref();
+    d = other.d;
+    if (d)
+        d->ref();
+
+    return *this;
+}
+
+WeakValue &WeakValue::operator =(const Value &other)
+{
+    if (!d) {
+        d = new PersistentValuePrivate(other, /*engine*/0, /*weak*/true);
+        return *this;
+    }
+    d = d->detach(other, /*weak*/true);
+    return *this;
+}
+
+
+WeakValue::~WeakValue()
+{
+    if (d)
+        d->deref();
+}
+
+void WeakValue::markOnce()
+{
+    if (!d)
+        return;
+    Managed *m = d->value.asManaged();
+    if (!m)
+        return;
+    m->mark();
+}
+
+PersistentValuePrivate::PersistentValuePrivate(const Value &v, ExecutionEngine *e, bool weak)
+    : value(v)
+    , refcount(1)
+    , prev(0)
+    , next(0)
+    , engine(e)
+{
+    if (!engine) {
+        Managed *m = v.asManaged();
+        if (!m)
+            return;
+
+        engine = m->engine();
+    }
+    if (engine) {
+        PersistentValuePrivate **listRoot = weak ? &engine->memoryManager->m_weakValues : &engine->memoryManager->m_persistentValues;
+
+        prev = listRoot;
+        next = *listRoot;
+        *prev = this;
+        if (next)
+            next->prev = &this->next;
+    }
+}
+
+PersistentValuePrivate::~PersistentValuePrivate()
+{
+}
+
+void PersistentValuePrivate::removeFromList()
+{
+    if (prev) {
+        if (next)
+            next->prev = prev;
+        *prev = next;
+        next = 0;
+        prev = 0;
+    }
+}
+
+void PersistentValuePrivate::deref()
+{
+    // if engine is not 0, they are registered with the memory manager
+    // and will get cleaned up in the next gc run
+    if (!--refcount) {
+        removeFromList();
+        delete this;
+    }
+}
+
+PersistentValuePrivate *PersistentValuePrivate::detach(const QV4::Value &value, bool weak)
+{
+    if (refcount == 1) {
+        this->value = value;
+
+        Managed *m = value.asManaged();
+        if (!prev) {
+            if (m) {
+                ExecutionEngine *engine = m->engine();
+                if (engine) {
+                    PersistentValuePrivate **listRoot = weak ? &engine->memoryManager->m_weakValues : &engine->memoryManager->m_persistentValues;
+                    prev = listRoot;
+                    next = *listRoot;
+                    *prev = this;
+                    if (next)
+                        next->prev = &this->next;
+                }
+            }
+        } else if (!m)
+            removeFromList();
+
+        return this;
+    }
+    --refcount;
+    return new PersistentValuePrivate(value, engine, weak);
+}
+