V8DataViewCustom.cpp   [plain text]

/*
 * Copyright (C) 2010 Google Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
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 * 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
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 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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#include "config.h"
#include "DataView.h"

#include "V8ArrayBufferViewCustom.h"
#include "V8Binding.h"
#include "V8BindingMacros.h"
#include "V8DataView.h"
#include "V8Proxy.h"

namespace WebCore {

v8::Handle<v8::Value> V8DataView::constructorCallback(const v8::Arguments& args)
{
    INC_STATS("DOM.DataView.Constructor");

    if (!args.IsConstructCall())
        return throwError("DOM object constructor cannot be called as a function", V8Proxy::TypeError);

    if (ConstructorMode::current() == ConstructorMode::WrapExistingObject)
        return args.Holder();

    if (!args.Length()) {
        // see constructWebGLArray -- we don't seem to be able to distingish between
        // 'new DataView()' and the call used to construct the cached DataView object.
        RefPtr<DataView> dataView = DataView::create(0);
        V8DOMWrapper::setDOMWrapper(args.Holder(), &info, dataView.get());
        V8DOMWrapper::setJSWrapperForDOMObject(dataView.release(), v8::Persistent<v8::Object>::New(args.Holder()));
        return args.Holder();
    }
    if (args[0]->IsNull() || !V8ArrayBuffer::HasInstance(args[0]))
        return V8Proxy::throwTypeError();
    return constructWebGLArrayWithArrayBufferArgument<DataView, char>(args, &info, v8::kExternalByteArray, false);
}

v8::Handle<v8::Value> toV8(DataView* impl, v8::Isolate* isolate)
{
    if (!impl)
        return v8::Null();
    return V8DataView::wrap(impl, isolate);
}

v8::Handle<v8::Value> V8DataView::getInt8Callback(const v8::Arguments& args)
{
    INC_STATS("DOM.DataView.getInt8");
    if (args.Length() < 1)
        return V8Proxy::throwNotEnoughArgumentsError();

    DataView* imp = V8DataView::toNative(args.Holder());
    ExceptionCode ec = 0;
    EXCEPTION_BLOCK(unsigned, byteOffset, toUInt32(args[0]));
    int8_t result = imp->getInt8(byteOffset, ec);
    if (UNLIKELY(ec)) {
        V8Proxy::setDOMException(ec, args.GetIsolate());
        return v8::Handle<v8::Value>();
    }
    return v8::Integer::New(result);
}

v8::Handle<v8::Value> V8DataView::getUint8Callback(const v8::Arguments& args)
{
    INC_STATS("DOM.DataView.getUint8");
    if (args.Length() < 1)
        return V8Proxy::throwNotEnoughArgumentsError();

    DataView* imp = V8DataView::toNative(args.Holder());
    ExceptionCode ec = 0;
    EXCEPTION_BLOCK(unsigned, byteOffset, toUInt32(args[0]));
    uint8_t result = imp->getUint8(byteOffset, ec);
    if (UNLIKELY(ec)) {
        V8Proxy::setDOMException(ec, args.GetIsolate());
        return v8::Handle<v8::Value>();
    }
    return v8::Integer::New(result);
}

v8::Handle<v8::Value> V8DataView::setInt8Callback(const v8::Arguments& args)
{
    INC_STATS("DOM.DataView.setInt8");
    if (args.Length() < 2)
        return V8Proxy::throwNotEnoughArgumentsError();

    DataView* imp = V8DataView::toNative(args.Holder());
    ExceptionCode ec = 0;
    EXCEPTION_BLOCK(unsigned, byteOffset, toUInt32(args[0]));
    EXCEPTION_BLOCK(int, value, toInt32(args[1]));
    imp->setInt8(byteOffset, static_cast<int8_t>(value), ec);
    if (UNLIKELY(ec))
        V8Proxy::setDOMException(ec, args.GetIsolate());
    return v8::Handle<v8::Value>();
}

v8::Handle<v8::Value> V8DataView::setUint8Callback(const v8::Arguments& args)
{
    INC_STATS("DOM.DataView.setUint8");
    if (args.Length() < 2)
        return V8Proxy::throwNotEnoughArgumentsError();

    DataView* imp = V8DataView::toNative(args.Holder());
    ExceptionCode ec = 0;
    EXCEPTION_BLOCK(unsigned, byteOffset, toUInt32(args[0]));
    EXCEPTION_BLOCK(int, value, toInt32(args[1]));
    imp->setUint8(byteOffset, static_cast<uint8_t>(value), ec);
    if (UNLIKELY(ec))
        V8Proxy::setDOMException(ec, args.GetIsolate());
    return v8::Handle<v8::Value>();
}

} // namespace WebCore