Add support for Float64Array.

Cherry pick from WebKit r87197 to add support for
Float64Array. Note that this requires at least V8 3.3.

In particular, this CL means that we will consume less
memory executing Emscripten code.

See http://trac.webkit.org/changeset/87197/

Bug: 5558474

Change-Id: I686d59acfdb56d03496f407d114826f35b4ff2c8

4 files changed, 129 insertions, 0 deletions

diff --git a/Source/WebCore/bindings/js/JSBindingsAllInOne.cpp b/Source/WebCore/bindings/js/JSBindingsAllInOne.cpp
index a457ce8..82367b2 100644
--- a/Source/WebCore/bindings/js/JSBindingsAllInOne.cpp
+++ b/Source/WebCore/bindings/js/JSBindingsAllInOne.cpp
@@ -81,6 +81,7 @@
 #include "JSEventTarget.cpp"
 #include "JSExceptionBase.cpp"
 #include "JSFloat32ArrayCustom.cpp"
+#include "JSFloat64ArrayCustom.cpp"
 #include "JSGeolocationCustom.cpp"
 #include "JSHTMLAllCollectionCustom.cpp"
 #include "JSHTMLAppletElementCustom.cpp"
diff --git a/Source/WebCore/bindings/js/JSDOMWindowCustom.cpp b/Source/WebCore/bindings/js/JSDOMWindowCustom.cpp
index 4bde9e5..938be96 100644
--- a/Source/WebCore/bindings/js/JSDOMWindowCustom.cpp
+++ b/Source/WebCore/bindings/js/JSDOMWindowCustom.cpp
@@ -31,6 +31,7 @@
 #include "JSEventListener.h"
 #include "JSEventSource.h"
 #include "JSFloat32Array.h"
+#include "JSFloat64Array.h"
 #include "JSHTMLCollection.h"
 #include "JSHistory.h"
 #include "JSImageConstructor.h"
@@ -569,6 +570,11 @@ JSValue JSDOMWindow::float32Array(ExecState* exec) const
     return getDOMConstructor<JSFloat32ArrayConstructor>(exec, this);
 }
 
+JSValue JSDOMWindow::float64Array(ExecState* exec) const 
+{ 
+    return getDOMConstructor<JSFloat64ArrayConstructor>(exec, this); 
+} 
+
 JSValue JSDOMWindow::dataView(ExecState* exec) const
 {
     return getDOMConstructor<JSDataViewConstructor>(exec, this);
diff --git a/Source/WebCore/bindings/js/JSFloat64ArrayCustom.cpp b/Source/WebCore/bindings/js/JSFloat64ArrayCustom.cpp
new file mode 100644
index 0000000..446b0ec
--- /dev/null
+++ b/Source/WebCore/bindings/js/JSFloat64ArrayCustom.cpp
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2011 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#include "config.h"
+#include "JSFloat64Array.h"
+
+#include "Float64Array.h"
+#include "JSArrayBufferViewHelper.h"
+
+using namespace JSC;
+
+namespace WebCore {
+
+void JSFloat64Array::indexSetter(JSC::ExecState* exec, unsigned index, JSC::JSValue value)
+{
+    impl()->set(index, value.toNumber(exec));
+}
+
+JSC::JSValue toJS(JSC::ExecState* exec, JSDOMGlobalObject* globalObject, Float64Array* object)
+{
+    return toJSArrayBufferView<JSFloat64Array>(exec, globalObject, object);
+}
+
+JSC::JSValue JSFloat64Array::set(JSC::ExecState* exec)
+{
+    return setWebGLArrayHelper(exec, impl(), toFloat64Array);
+}
+
+EncodedJSValue JSC_HOST_CALL JSFloat64ArrayConstructor::constructJSFloat64Array(ExecState* exec)
+{
+    JSFloat64ArrayConstructor* jsConstructor = static_cast<JSFloat64ArrayConstructor*>(exec->callee());
+    RefPtr<Float64Array> array = constructArrayBufferView<Float64Array, double>(exec);
+    if (!array.get())
+        // Exception has already been thrown.
+        return JSValue::encode(JSValue());
+    return JSValue::encode(asObject(toJS(exec, jsConstructor->globalObject(), array.get())));
+}
+
+} // namespace WebCore
diff --git a/Source/WebCore/bindings/v8/custom/V8Float64ArrayCustom.cpp b/Source/WebCore/bindings/v8/custom/V8Float64ArrayCustom.cpp
new file mode 100644
index 0000000..429e962
--- /dev/null
+++ b/Source/WebCore/bindings/v8/custom/V8Float64ArrayCustom.cpp
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2011 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "Float64Array.h"
+
+#include "ArrayBuffer.h"
+#include "V8ArrayBuffer.h"
+#include "V8ArrayBufferViewCustom.h"
+#include "V8Binding.h"
+#include "V8Float64Array.h"
+#include "V8Proxy.h"
+
+namespace WebCore {
+
+v8::Handle<v8::Value> V8Float64Array::constructorCallback(const v8::Arguments& args)
+{
+    INC_STATS("DOM.Float64Array.Contructor");
+
+    return constructWebGLArray<Float64Array, double>(args, &info, v8::kExternalDoubleArray);
+}
+
+v8::Handle<v8::Value> V8Float64Array::setCallback(const v8::Arguments& args)
+{
+    INC_STATS("DOM.Float64Array.set()");
+    return setWebGLArrayHelper<Float64Array, V8Float64Array>(args);
+}
+
+v8::Handle<v8::Value> toV8(Float64Array* impl)
+{
+    if (!impl)
+        return v8::Null();
+    v8::Handle<v8::Object> wrapper = V8Float64Array::wrap(impl);
+    if (!wrapper.IsEmpty())
+        wrapper->SetIndexedPropertiesToExternalArrayData(impl->baseAddress(), v8::kExternalDoubleArray, impl->length());
+    return wrapper;
+}
+
+} // namespace WebCore