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//===----------------------------------------------------------------------===//
//
// This source file is part of the SwiftNIO open source project
//
// Copyright (c) 2022 Apple Inc. and the SwiftNIO project authors
// Licensed under Apache License v2.0
//
// See LICENSE.txt for license information
// See CONTRIBUTORS.txt for the list of SwiftNIO project authors
//
// SPDX-License-Identifier: Apache-2.0
//
//===----------------------------------------------------------------------===//
extension TimeAmount {
@available(macOS 13, iOS 16, tvOS 16, watchOS 9, *)
/// Creates a new `TimeAmount` for the given `Duration`, truncating and clamping if necessary.
///
/// - returns: `TimeAmount`, truncated to nanosecond precision, and clamped to `Int64.max` nanoseconds.
public init(_ duration: Swift.Duration) {
self = .nanoseconds(duration.nanosecondsClamped)
}
}
@available(macOS 13, iOS 16, tvOS 16, watchOS 9, *)
extension Swift.Duration {
/// Construct a `Duration` given a number of nanoseconds represented as a `TimeAmount`.
///
/// - returns: A `Duration` representing a given number of nanoseconds.
public init(_ timeAmount: TimeAmount) {
self = .nanoseconds(timeAmount.nanoseconds)
}
}
@available(macOS 13, iOS 16, tvOS 16, watchOS 9, *)
internal extension Swift.Duration {
/// The duration represented as nanoseconds, clamped to maximum expressible value.
var nanosecondsClamped: Int64 {
let components = self.components
let secondsComponentNanos = components.seconds.multipliedReportingOverflow(by: 1_000_000_000)
let attosCompononentNanos = components.attoseconds / 1_000_000_000
let combinedNanos = secondsComponentNanos.partialValue.addingReportingOverflow(attosCompononentNanos)
guard
!secondsComponentNanos.overflow,
!combinedNanos.overflow
else {
return .max
}
return combinedNanos.partialValue
}
}
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