JavaScriptCore-7600.1.4.9.tar.gz

[apple/javascriptcore.git] / runtime / JSDataView.cpp

diff --git a/runtime/JSDataView.cpp b/runtime/JSDataView.cpp
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+++ b/runtime/JSDataView.cpp
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+/*
+ * Copyright (C) 2013 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 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 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 "JSDataView.h"
+
+#include "ArrayBufferView.h"
+#include "DataView.h"
+#include "Error.h"
+#include "JSCInlines.h"
+
+namespace JSC {
+
+const ClassInfo JSDataView::s_info = {
+    "DataView", &Base::s_info, 0, 0, CREATE_METHOD_TABLE(JSDataView)};
+
+JSDataView::JSDataView(VM& vm, ConstructionContext& context, ArrayBuffer* buffer)
+    : Base(vm, context)
+    , m_buffer(buffer)
+{
+}
+
+JSDataView* JSDataView::create(
+    ExecState* exec, Structure* structure, PassRefPtr<ArrayBuffer> passedBuffer,
+    unsigned byteOffset, unsigned byteLength)
+{
+    RefPtr<ArrayBuffer> buffer = passedBuffer;
+    if (!ArrayBufferView::verifySubRange<uint8_t>(buffer, byteOffset, byteLength)) {
+        throwVMError(
+            exec, createRangeError(exec, "Byte offset and length out of range of buffer"));
+        return 0;
+    }
+    VM& vm = exec->vm();
+    ConstructionContext context(
+        structure, buffer, byteOffset, byteLength, ConstructionContext::DataView);
+    ASSERT(context);
+    JSDataView* result =
+        new (NotNull, allocateCell<JSDataView>(vm.heap)) JSDataView(vm, context, buffer.get());
+    result->finishCreation(vm);
+    return result;
+}
+
+JSDataView* JSDataView::createUninitialized(ExecState*, Structure*, unsigned)
+{
+    UNREACHABLE_FOR_PLATFORM();
+    return 0;
+}
+
+JSDataView* JSDataView::create(ExecState*, Structure*, unsigned)
+{
+    UNREACHABLE_FOR_PLATFORM();
+    return 0;
+}
+
+bool JSDataView::set(ExecState*, JSObject*, unsigned, unsigned)
+{
+    UNREACHABLE_FOR_PLATFORM();
+    return false;
+}
+
+PassRefPtr<DataView> JSDataView::typedImpl()
+{
+    return DataView::create(buffer(), byteOffset(), length());
+}
+
+bool JSDataView::getOwnPropertySlot(
+    JSObject* object, ExecState* exec, PropertyName propertyName, PropertySlot& slot)
+{
+    JSDataView* thisObject = jsCast<JSDataView*>(object);
+    if (propertyName == exec->propertyNames().byteLength) {
+        slot.setValue(thisObject, DontEnum | ReadOnly, jsNumber(thisObject->m_length));
+        return true;
+    }
+    
+    return Base::getOwnPropertySlot(thisObject, exec, propertyName, slot);
+}
+
+ArrayBuffer* JSDataView::slowDownAndWasteMemory(JSArrayBufferView*)
+{
+    UNREACHABLE_FOR_PLATFORM();
+    return 0;
+}
+
+PassRefPtr<ArrayBufferView> JSDataView::getTypedArrayImpl(JSArrayBufferView* object)
+{
+    JSDataView* thisObject = jsCast<JSDataView*>(object);
+    return thisObject->typedImpl();
+}
+
+Structure* JSDataView::createStructure(
+    VM& vm, JSGlobalObject* globalObject, JSValue prototype)
+{
+    return Structure::create(
+        vm, globalObject, prototype, TypeInfo(DataViewType, StructureFlags), info(),
+        NonArray);
+}
+
+} // namespace JSC
+