1/*
2 * Copyright (C) 2016 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "IDLTypes.h"
29#include "JSDOMConvertBase.h"
30
31namespace WebCore {
32
33template<typename IDLType>
34struct VariadicConverter {
35 using Item = typename IDLType::ImplementationType;
36
37 static Optional<Item> convert(JSC::ExecState& state, JSC::JSValue value)
38 {
39 auto& vm = state.vm();
40 auto scope = DECLARE_THROW_SCOPE(vm);
41
42 auto result = Converter<IDLType>::convert(state, value);
43 RETURN_IF_EXCEPTION(scope, WTF::nullopt);
44
45 return result;
46 }
47};
48
49template<typename IDLType> Vector<typename VariadicConverter<IDLType>::Item> convertVariadicArguments(JSC::ExecState& state, size_t startIndex)
50{
51 size_t length = state.argumentCount();
52 if (startIndex >= length)
53 return { };
54
55 Vector<typename VariadicConverter<IDLType>::Item> result;
56 result.reserveInitialCapacity(length - startIndex);
57
58 for (size_t i = startIndex; i < length; ++i) {
59 auto value = VariadicConverter<IDLType>::convert(state, state.uncheckedArgument(i));
60 if (!value)
61 return { };
62 result.uncheckedAppend(WTFMove(*value));
63 }
64
65 return result;
66}
67
68} // namespace WebCore
69