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/*
* Copyright (C) 2016 Igalia S.L.
* Copyright (C) 2021 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. 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 INC. OR ITS 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.
*/
#pragma once
#include <JavaScriptCore/ArrayBuffer.h>
#include <JavaScriptCore/ArrayBufferView.h>
#include <span>
#include <variant>
#include <wtf/Compiler.h>
#include <wtf/RefPtr.h>
#if PLATFORM(COCOA) && defined(__OBJC__)
#include <wtf/cocoa/SpanCocoa.h>
OBJC_CLASS NSData;
#endif
namespace WebCore {
class BufferSource {
public:
using VariantType = std::variant<RefPtr<JSC::ArrayBufferView>, RefPtr<JSC::ArrayBuffer>>;
BufferSource() { }
BufferSource(VariantType&& variant)
: m_variant(WTFMove(variant))
{ }
BufferSource(const VariantType& variant)
: m_variant(variant)
{ }
explicit BufferSource(std::span<const uint8_t> span)
: m_variant(JSC::ArrayBuffer::tryCreate(span)) { }
const VariantType& variant() const { return m_variant; }
size_t length() const
{
return std::visit([](auto& buffer) {
return buffer ? buffer->byteLength() : 0;
}, m_variant);
}
std::span<const uint8_t> span() const
{
return std::visit([](auto& buffer) {
return buffer ? buffer->span() : std::span<const uint8_t> { };
}, m_variant);
}
std::span<uint8_t> mutableSpan()
{
return std::visit([](auto& buffer) {
return buffer ? buffer->mutableSpan() : std::span<uint8_t> { };
}, m_variant);
}
private:
VariantType m_variant;
};
inline BufferSource toBufferSource(std::span<const uint8_t> data)
{
return BufferSource(JSC::ArrayBuffer::tryCreate(data));
}
#if PLATFORM(COCOA) && defined(__OBJC__)
inline BufferSource toBufferSource(NSData *data)
{
return BufferSource(JSC::ArrayBuffer::tryCreate(span(data)));
}
inline RetainPtr<NSData> toNSData(const BufferSource& data)
{
return WTF::toNSData(data.span());
}
#endif
} // namespace WebCore
#if PLATFORM(COCOA) && defined(__OBJC__)
using WebCore::toNSData;
#endif
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