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/*
* Copyright (C) 2017-2022 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 <wtf/text/WTFString.h>
namespace WebCore {
struct FourCC {
constexpr FourCC() = default;
constexpr FourCC(uint32_t value) : value { value } { }
constexpr FourCC(std::span<const char, 5> nullTerminatedString);
constexpr std::array<char, 5> string() const;
static std::optional<FourCC> fromString(StringView);
friend constexpr bool operator==(FourCC, FourCC) = default;
uint32_t value { 0 };
};
constexpr FourCC::FourCC(std::span<const char, 5> data)
: value(data[0] << 24 | data[1] << 16 | data[2] << 8 | data[3])
{
ASSERT_UNDER_CONSTEXPR_CONTEXT(isASCII(data[0]));
ASSERT_UNDER_CONSTEXPR_CONTEXT(isASCII(data[1]));
ASSERT_UNDER_CONSTEXPR_CONTEXT(isASCII(data[2]));
ASSERT_UNDER_CONSTEXPR_CONTEXT(isASCII(data[3]));
ASSERT_UNDER_CONSTEXPR_CONTEXT(data[4] == '\0');
}
constexpr std::array<char, 5> FourCC::string() const
{
return {
static_cast<char>(value >> 24),
static_cast<char>(value >> 16),
static_cast<char>(value >> 8),
static_cast<char>(value),
'\0'
};
}
} // namespace WebCore
namespace WTF {
template<typename> struct LogArgument;
template<> struct LogArgument<WebCore::FourCC> {
static String toString(const WebCore::FourCC& code) { return String::fromLatin1(code.string().data()); }
};
} // namespace WTF
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