1/*
2 * Copyright (C) 2016 Igalia S.L.
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 <JavaScriptCore/ArrayBuffer.h>
29#include <JavaScriptCore/ArrayBufferView.h>
30#include <wtf/RefPtr.h>
31#include <wtf/Variant.h>
32
33namespace WebCore {
34
35class BufferSource {
36public:
37 using VariantType = WTF::Variant<RefPtr<JSC::ArrayBufferView>, RefPtr<JSC::ArrayBuffer>>;
38
39 BufferSource() { }
40 BufferSource(VariantType&& variant)
41 : m_variant(WTFMove(variant))
42 { }
43
44 const VariantType& variant() const { return m_variant; }
45
46 const uint8_t* data() const
47 {
48 return WTF::visit([](auto& buffer) -> const uint8_t* {
49 return buffer ? static_cast<const uint8_t*>(buffer->data()) : nullptr;
50 }, m_variant);
51 }
52
53 size_t length() const
54 {
55 return WTF::visit([](auto& buffer) -> size_t {
56 return buffer ? buffer->byteLength() : 0;
57 }, m_variant);
58 }
59
60private:
61 VariantType m_variant;
62};
63
64} // namespace WebCore
65