Merge branch 'master' of ssh://codereview.qt-project.org:29418/playground/v4vm into v4

This is the initial merge of the v4vm JS engine, designed specifically for QML.

The engine is tested on Linux and Mac OS X, works on x86, x86-64 and ARM.

Change-Id: I826b72cfa3d3575007b70d78604080582db568db

Reviewed-by: Lars Knoll <lars.knoll@digia.com>

1 files changed, 185 insertions, 0 deletions

diff --git a/src/qml/qml/v4vm/qv4objectiterator.cpp b/src/qml/qml/v4vm/qv4objectiterator.cpp
new file mode 100644
index 0000000000..44ba9efcaa
--- /dev/null
+++ b/src/qml/qml/v4vm/qv4objectiterator.cpp
@@ -0,0 +1,185 @@
+/****************************************************************************
+**
+** 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include "qv4objectiterator.h"
+#include "qv4object.h"
+#include "qv4stringobject.h"
+#include "qv4identifier.h"
+
+namespace QQmlJS {
+namespace VM {
+
+ObjectIterator::ObjectIterator(ExecutionContext *context, Object *o, uint flags)
+    : context(context)
+    , object(o)
+    , current(o)
+    , arrayNode(0)
+    , arrayIndex(0)
+    , memberIndex(0)
+    , flags(flags)
+{
+    if (current) {
+        if (current->asStringObject())
+            this->flags |= CurrentIsString;
+    }
+}
+
+Property *ObjectIterator::next(String **name, uint *index, PropertyAttributes *attrs)
+{
+    Property *p = 0;
+    *name = 0;
+    *index = UINT_MAX;
+    while (1) {
+        if (!current)
+            break;
+
+        if (flags & CurrentIsString) {
+            StringObject *s = static_cast<StringObject *>(current);
+            uint slen = s->value.stringValue()->toQString().length();
+            while (arrayIndex < slen) {
+                *index = arrayIndex;
+                ++arrayIndex;
+                if (attrs)
+                    *attrs = s->arrayAttributes ? s->arrayAttributes[arrayIndex] : PropertyAttributes(Attr_NotWritable|Attr_NotConfigurable);
+                return s->__getOwnProperty__(*index);
+            }
+            flags &= ~CurrentIsString;
+            arrayNode = current->sparseArrayBegin();
+            // iterate until we're past the end of the string
+            while (arrayNode && arrayNode->key() < slen)
+                arrayNode = arrayNode->nextNode();
+        }
+
+        if (!arrayIndex)
+            arrayNode = current->sparseArrayBegin();
+
+        // sparse arrays
+        if (arrayNode) {
+            while (arrayNode != current->sparseArrayEnd()) {
+                int k = arrayNode->key();
+                uint pidx = arrayNode->value;
+                p = current->arrayData + pidx;
+                arrayNode = arrayNode->nextNode();
+                PropertyAttributes a = current->arrayAttributes ? current->arrayAttributes[pidx] : PropertyAttributes(Attr_Data);
+                if (!(flags & EnumberableOnly) || a.isEnumerable()) {
+                    arrayIndex = k + 1;
+                    *index = k;
+                    if (attrs)
+                        *attrs = a;
+                    return p;
+                }
+            }
+            arrayNode = 0;
+            arrayIndex = UINT_MAX;
+        }
+        // dense arrays
+        while (arrayIndex < current->arrayDataLen) {
+            uint pidx = current->propertyIndexFromArrayIndex(arrayIndex);
+            p = current->arrayData + pidx;
+            PropertyAttributes a = current->arrayAttributes ? current->arrayAttributes[pidx] : PropertyAttributes(Attr_Data);
+            ++arrayIndex;
+            if ((!current->arrayAttributes || !current->arrayAttributes[pidx].isGeneric())
+                 && (!(flags & EnumberableOnly) || a.isEnumerable())) {
+                *index = arrayIndex - 1;
+                if (attrs)
+                    *attrs = a;
+                return p;
+            }
+        }
+
+        if (memberIndex == current->internalClass->size) {
+            if (flags & WithProtoChain)
+                current = current->prototype;
+            else
+                current = 0;
+            if (current && current->asStringObject())
+                flags |= CurrentIsString;
+            else
+                flags &= ~CurrentIsString;
+
+
+            arrayIndex = 0;
+            memberIndex = 0;
+            continue;
+        }
+        String *n = current->internalClass->nameMap.at(memberIndex);
+        assert(n);
+        // ### check that it's not a repeated attribute
+
+        p = current->memberData + memberIndex;
+        PropertyAttributes a = current->internalClass->propertyData[memberIndex];
+        ++memberIndex;
+        if (!(flags & EnumberableOnly) || a.isEnumerable()) {
+            *name = n;
+            if (attrs)
+                *attrs = a;
+            return p;
+        }
+    }
+    return 0;
+}
+
+Value ObjectIterator::nextPropertyName()
+{
+    uint index;
+    String *name;
+    next(&name, &index);
+    if (name)
+        return Value::fromString(name);
+    if (index < UINT_MAX)
+        return Value::fromDouble(index);
+    return Value::nullValue();
+}
+
+Value ObjectIterator::nextPropertyNameAsString()
+{
+    uint index;
+    String *name;
+    next(&name, &index);
+    if (name)
+        return Value::fromString(name);
+    if (index < UINT_MAX)
+        return __qmljs_to_string(Value::fromDouble(index), context);
+    return Value::nullValue();
+}
+
+}
+}
+