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/*
* Copyright (C) 2023 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/ObjectIdentifier.h>
namespace WebKit {
struct WebExtensionTabIdentifierType;
using WebExtensionTabIdentifier = ObjectIdentifier<WebExtensionTabIdentifierType>;
namespace WebExtensionTabConstants {
static constexpr double None { -1 };
static constexpr const WebExtensionTabIdentifier NoneIdentifier { std::numeric_limits<uint64_t>::max() - 1 };
}
inline bool isNone(WebExtensionTabIdentifier identifier)
{
return identifier == WebExtensionTabConstants::NoneIdentifier;
}
inline bool isNone(std::optional<WebExtensionTabIdentifier> identifier)
{
return identifier && isNone(identifier.value());
}
inline bool isValid(std::optional<WebExtensionTabIdentifier> identifier)
{
return identifier && !isNone(identifier.value());
}
inline std::optional<WebExtensionTabIdentifier> toWebExtensionTabIdentifier(double identifier)
{
if (identifier == WebExtensionTabConstants::None)
return WebExtensionTabConstants::NoneIdentifier;
if (!std::isfinite(identifier) || identifier <= 0 || identifier >= static_cast<double>(WebExtensionTabConstants::NoneIdentifier.toUInt64()))
return std::nullopt;
double integral;
if (std::modf(identifier, &integral) != 0.0) {
// Only integral numbers can be used.
return std::nullopt;
}
auto identifierAsUint64 = static_cast<uint64_t>(identifier);
if (!WebExtensionTabIdentifier::isValidIdentifier(identifierAsUint64)) {
ASSERT_NOT_REACHED();
return WebExtensionTabConstants::NoneIdentifier;
}
return WebExtensionTabIdentifier { identifierAsUint64 };
}
inline double toWebAPI(const WebExtensionTabIdentifier& identifier)
{
if (isNone(identifier))
return WebExtensionTabConstants::None;
return static_cast<double>(identifier.toUInt64());
}
}
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