Basic support for typed arrays

This implements most of the spec required for the
Khronos typed array specification.

It tries to follow ECMAScript 6 as closely as possible,
but currently only implements a subset of the ECMAScript
6 specification.

Addes a test script in tests/manual/v4 to test our
implementation.

Change-Id: I8ec63869500358e088b73240e1f37120ae3cf59a
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>

1 files changed, 133 insertions, 0 deletions

diff --git a/src/qml/jsruntime/qv4typedarray_p.h b/src/qml/jsruntime/qv4typedarray_p.h
new file mode 100644
index 0000000000..deafb0eed8
--- /dev/null
+++ b/src/qml/jsruntime/qv4typedarray_p.h
@@ -0,0 +1,133 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 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.
+**
+** $QT_BEGIN_LICENSE:LGPL21$
+** 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 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file. Please review the
+** following information to ensure the GNU Lesser General Public License
+** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
+** 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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#ifndef QV4TYPEDARRAY_H
+#define QV4TYPEDARRAY_H
+
+#include "qv4object_p.h"
+#include "qv4functionobject_p.h"
+
+QT_BEGIN_NAMESPACE
+
+namespace QV4 {
+
+struct ArrayBuffer;
+
+typedef ReturnedValue (*TypedArrayRead)(const char *data, int index);
+typedef void (*TypedArrayWrite)(ExecutionEngine *engine, char *data, int index, ValueRef value);
+
+struct TypedArrayOperations {
+    int bytesPerElement;
+    const char *name;
+    TypedArrayRead read;
+    TypedArrayWrite write;
+};
+
+struct TypedArray : Object
+{
+    enum Type {
+        Int8Array,
+        UInt8Array,
+        UInt8ClampedArray,
+        Int16Array,
+        UInt16Array,
+        Int32Array,
+        UInt32Array,
+        Float32Array,
+        Float64Array,
+        NTypes
+    };
+
+    struct Data : Object::Data {
+        Data(ExecutionEngine *e, Type t);
+
+        const TypedArrayOperations *type;
+        ArrayBuffer *buffer;
+        uint byteLength;
+        uint byteOffset;
+    };
+    V4_OBJECT(Object)
+
+    uint length() const {
+        return d()->byteLength/d()->type->bytesPerElement;
+    }
+
+
+    static void markObjects(Managed *that, ExecutionEngine *e);
+    static ReturnedValue getIndexed(Managed *m, uint index, bool *hasProperty);
+    static void putIndexed(Managed *m, uint index, const ValueRef value);
+};
+
+struct TypedArrayCtor: FunctionObject
+{
+    struct Data : FunctionObject::Data {
+        Data(ExecutionContext *scope, TypedArray::Type t);
+
+        TypedArray::Type type;
+    };
+
+    V4_OBJECT(FunctionObject)
+
+    static ReturnedValue construct(Managed *m, CallData *callData);
+    static ReturnedValue call(Managed *that, CallData *callData);
+};
+
+
+struct TypedArrayPrototype : Object
+{
+    struct Data : Object::Data {
+        Data(ExecutionEngine *e, TypedArray::Type t)
+            : Object::Data(e)
+            , type(t)
+        {
+            setVTable(staticVTable());
+        }
+        TypedArray::Type type;
+    };
+    V4_OBJECT(Object)
+
+    void init(ExecutionEngine *engine, TypedArrayCtor *ctor);
+
+    static ReturnedValue method_get_buffer(CallContext *ctx);
+    static ReturnedValue method_get_byteLength(CallContext *ctx);
+    static ReturnedValue method_get_byteOffset(CallContext *ctx);
+    static ReturnedValue method_get_length(CallContext *ctx);
+
+    static ReturnedValue method_set(CallContext *ctx);
+    static ReturnedValue method_subarray(CallContext *ctx);
+};
+
+} // namespace QV4
+
+QT_END_NAMESPACE
+
+#endif