mirror of
https://github.com/apple/swift-foundation.git
synced 2025-05-23 14:00:14 +08:00
421 lines
16 KiB
Swift
421 lines
16 KiB
Swift
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This source file is part of the Swift.org open source project
|
|
//
|
|
// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
|
|
// Licensed under Apache License v2.0 with Runtime Library Exception
|
|
//
|
|
// See https://swift.org/LICENSE.txt for license information
|
|
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#if canImport(Darwin)
|
|
import Darwin
|
|
#elseif canImport(Bionic)
|
|
@preconcurrency import Bionic
|
|
#elseif canImport(Glibc)
|
|
@preconcurrency import Glibc
|
|
#elseif canImport(Musl)
|
|
@preconcurrency import Musl
|
|
#elseif canImport(WinSDK)
|
|
import WinSDK
|
|
#elseif os(WASI)
|
|
@preconcurrency import WASILibc
|
|
#endif
|
|
|
|
#if !FOUNDATION_FRAMEWORK
|
|
@available(macOS 10.10, iOS 8.0, watchOS 2.0, tvOS 9.0, *)
|
|
public typealias TimeInterval = Double
|
|
#endif // !FOUNDATION_FRAMEWORK
|
|
/**
|
|
`Date` represents a single point in time.
|
|
|
|
A `Date` is independent of a particular calendar or time zone. To represent a `Date` to a user, you must interpret it in the context of a `Calendar`.
|
|
*/
|
|
@available(macOS 10.10, iOS 8.0, watchOS 2.0, tvOS 9.0, *)
|
|
public struct Date : Comparable, Hashable, Equatable, Sendable {
|
|
|
|
internal var _time : TimeInterval
|
|
|
|
/// The number of seconds from 1 January 1970 to the reference date, 1 January 2001.
|
|
public static let timeIntervalBetween1970AndReferenceDate : TimeInterval = 978307200.0
|
|
|
|
/// The number of seconds from 1 January 1601 to the reference date, 1 January 2001.
|
|
internal static let timeIntervalBetween1601AndReferenceDate: TimeInterval = 12622780800.0
|
|
|
|
/// The interval between 00:00:00 UTC on 1 January 2001 and the current date and time.
|
|
public static var timeIntervalSinceReferenceDate : TimeInterval {
|
|
return Self.getCurrentAbsoluteTime()
|
|
}
|
|
|
|
/// Returns a `Date` initialized to the current date and time.
|
|
public init() {
|
|
_time = Self.getCurrentAbsoluteTime()
|
|
}
|
|
|
|
/// Returns a `Date` initialized relative to the current date and time by a given number of seconds.
|
|
public init(timeIntervalSinceNow: TimeInterval) {
|
|
self.init(timeIntervalSinceReferenceDate: timeIntervalSinceNow + Self.getCurrentAbsoluteTime())
|
|
}
|
|
|
|
/// Returns a `Date` initialized relative to 00:00:00 UTC on 1 January 1970 by a given number of seconds.
|
|
public init(timeIntervalSince1970: TimeInterval) {
|
|
self.init(timeIntervalSinceReferenceDate: timeIntervalSince1970 - Date.timeIntervalBetween1970AndReferenceDate)
|
|
}
|
|
|
|
/**
|
|
Returns a `Date` initialized relative to another given date by a given number of seconds.
|
|
|
|
- Parameter timeInterval: The number of seconds to add to `date`. A negative value means the receiver will be earlier than `date`.
|
|
- Parameter date: The reference date.
|
|
*/
|
|
public init(timeInterval: TimeInterval, since date: Date) {
|
|
self.init(timeIntervalSinceReferenceDate: date.timeIntervalSinceReferenceDate + timeInterval)
|
|
}
|
|
|
|
/// Returns a `Date` initialized relative to 00:00:00 UTC on 1 January 2001 by a given number of seconds.
|
|
public init(timeIntervalSinceReferenceDate ti: TimeInterval) {
|
|
_time = ti
|
|
}
|
|
|
|
/**
|
|
Returns the interval between the date object and 00:00:00 UTC on 1 January 2001.
|
|
|
|
This property's value is negative if the date object is earlier than the system's absolute reference date (00:00:00 UTC on 1 January 2001).
|
|
*/
|
|
public var timeIntervalSinceReferenceDate: TimeInterval {
|
|
return _time
|
|
}
|
|
|
|
/**
|
|
Returns the interval between the receiver and another given date.
|
|
|
|
- Parameter another: The date with which to compare the receiver.
|
|
|
|
- Returns: The interval between the receiver and the `another` parameter. If the receiver is earlier than `anotherDate`, the return value is negative. If `anotherDate` is `nil`, the results are undefined.
|
|
|
|
- SeeAlso: `timeIntervalSince1970`
|
|
- SeeAlso: `timeIntervalSinceNow`
|
|
- SeeAlso: `timeIntervalSinceReferenceDate`
|
|
*/
|
|
public func timeIntervalSince(_ date: Date) -> TimeInterval {
|
|
return self.timeIntervalSinceReferenceDate - date.timeIntervalSinceReferenceDate
|
|
}
|
|
|
|
/**
|
|
The time interval between the date and the current date and time.
|
|
|
|
If the date is earlier than the current date and time, this property's value is negative.
|
|
|
|
- SeeAlso: `timeIntervalSince(_:)`
|
|
- SeeAlso: `timeIntervalSince1970`
|
|
- SeeAlso: `timeIntervalSinceReferenceDate`
|
|
*/
|
|
public var timeIntervalSinceNow: TimeInterval {
|
|
return self.timeIntervalSinceReferenceDate - Self.getCurrentAbsoluteTime()
|
|
}
|
|
|
|
/**
|
|
The interval between the date object and 00:00:00 UTC on 1 January 1970.
|
|
|
|
This property's value is negative if the date object is earlier than 00:00:00 UTC on 1 January 1970.
|
|
|
|
- SeeAlso: `timeIntervalSince(_:)`
|
|
- SeeAlso: `timeIntervalSinceNow`
|
|
- SeeAlso: `timeIntervalSinceReferenceDate`
|
|
*/
|
|
public var timeIntervalSince1970: TimeInterval {
|
|
return self.timeIntervalSinceReferenceDate + Date.timeIntervalBetween1970AndReferenceDate
|
|
}
|
|
|
|
internal var timeIntervalSince1601: TimeInterval {
|
|
return self.timeIntervalSinceReferenceDate + Date.timeIntervalBetween1601AndReferenceDate
|
|
}
|
|
|
|
/// Return a new `Date` by adding a `TimeInterval` to this `Date`.
|
|
///
|
|
/// - parameter timeInterval: The value to add, in seconds.
|
|
/// - warning: This only adjusts an absolute value. If you wish to add calendrical concepts like hours, days, months then you must use a `Calendar`. That will take into account complexities like daylight saving time, months with different numbers of days, and more.
|
|
public func addingTimeInterval(_ timeInterval: TimeInterval) -> Date {
|
|
return self + timeInterval
|
|
}
|
|
|
|
/// Add a `TimeInterval` to this `Date`.
|
|
///
|
|
/// - parameter timeInterval: The value to add, in seconds.
|
|
/// - warning: This only adjusts an absolute value. If you wish to add calendrical concepts like hours, days, months then you must use a `Calendar`. That will take into account complexities like daylight saving time, months with different numbers of days, and more.
|
|
public mutating func addTimeInterval(_ timeInterval: TimeInterval) {
|
|
self += timeInterval
|
|
}
|
|
|
|
/**
|
|
Creates and returns a Date value representing a date in the distant future.
|
|
|
|
The distant future is in terms of centuries.
|
|
*/
|
|
public static let distantFuture = Date(timeIntervalSinceReferenceDate: 63113904000.0)
|
|
|
|
/**
|
|
Creates and returns a Date value representing a date in the distant past.
|
|
|
|
The distant past is in terms of centuries.
|
|
*/
|
|
public static let distantPast = Date(timeIntervalSinceReferenceDate: -63114076800.0)
|
|
|
|
/// Returns a `Date` initialized to the current date and time.
|
|
@available(macOS 12, iOS 15, tvOS 15, watchOS 8, *)
|
|
public static var now : Date { Date() }
|
|
|
|
public func hash(into hasher: inout Hasher) {
|
|
hasher.combine(_time)
|
|
}
|
|
|
|
/// Compare two `Date` values.
|
|
public func compare(_ other: Date) -> ComparisonResult {
|
|
if _time < other.timeIntervalSinceReferenceDate {
|
|
return .orderedAscending
|
|
} else if _time > other.timeIntervalSinceReferenceDate {
|
|
return .orderedDescending
|
|
} else {
|
|
return .orderedSame
|
|
}
|
|
}
|
|
|
|
/// Returns true if the two `Date` values represent the same point in time.
|
|
public static func ==(lhs: Date, rhs: Date) -> Bool {
|
|
return lhs.timeIntervalSinceReferenceDate == rhs.timeIntervalSinceReferenceDate
|
|
}
|
|
|
|
/// Returns true if the left hand `Date` is earlier in time than the right hand `Date`.
|
|
public static func <(lhs: Date, rhs: Date) -> Bool {
|
|
return lhs.timeIntervalSinceReferenceDate < rhs.timeIntervalSinceReferenceDate
|
|
}
|
|
|
|
/// Returns true if the left hand `Date` is later in time than the right hand `Date`.
|
|
public static func >(lhs: Date, rhs: Date) -> Bool {
|
|
return lhs.timeIntervalSinceReferenceDate > rhs.timeIntervalSinceReferenceDate
|
|
}
|
|
|
|
/// Returns a `Date` with a specified amount of time added to it.
|
|
public static func +(lhs: Date, rhs: TimeInterval) -> Date {
|
|
return Date(timeIntervalSinceReferenceDate: lhs.timeIntervalSinceReferenceDate + rhs)
|
|
}
|
|
|
|
/// Returns a `Date` with a specified amount of time subtracted from it.
|
|
public static func -(lhs: Date, rhs: TimeInterval) -> Date {
|
|
return Date(timeIntervalSinceReferenceDate: lhs.timeIntervalSinceReferenceDate - rhs)
|
|
}
|
|
|
|
/// Add a `TimeInterval` to a `Date`.
|
|
///
|
|
/// - warning: This only adjusts an absolute value. If you wish to add calendrical concepts like hours, days, months then you must use a `Calendar`. That will take into account complexities like daylight saving time, months with different numbers of days, and more.
|
|
public static func +=(lhs: inout Date, rhs: TimeInterval) {
|
|
lhs = lhs + rhs
|
|
}
|
|
|
|
/// Subtract a `TimeInterval` from a `Date`.
|
|
///
|
|
/// - warning: This only adjusts an absolute value. If you wish to add calendrical concepts like hours, days, months then you must use a `Calendar`. That will take into account complexities like daylight saving time, months with different numbers of days, and more.
|
|
public static func -=(lhs: inout Date, rhs: TimeInterval) {
|
|
lhs = lhs - rhs
|
|
}
|
|
|
|
}
|
|
|
|
@available(macOS 10.10, iOS 8.0, watchOS 2.0, tvOS 9.0, *)
|
|
extension Date {
|
|
private static func getCurrentAbsoluteTime() -> TimeInterval {
|
|
#if canImport(WinSDK)
|
|
var ft: FILETIME = FILETIME()
|
|
var li: ULARGE_INTEGER = ULARGE_INTEGER()
|
|
GetSystemTimePreciseAsFileTime(&ft)
|
|
li.LowPart = ft.dwLowDateTime
|
|
li.HighPart = ft.dwHighDateTime
|
|
// FILETIME represents 100-ns intervals since January 1, 1601 (UTC)
|
|
return TimeInterval(Double(li.QuadPart) / 10_000_000.0 - Self.timeIntervalBetween1601AndReferenceDate)
|
|
#else
|
|
var ts: timespec = timespec()
|
|
clock_gettime(CLOCK_REALTIME, &ts)
|
|
var ret = TimeInterval(ts.tv_sec) - Self.timeIntervalBetween1970AndReferenceDate
|
|
ret += (1.0E-9 * TimeInterval(ts.tv_nsec))
|
|
return ret
|
|
#endif // canImport(WinSDK)
|
|
}
|
|
}
|
|
|
|
@available(macOS 10.10, iOS 8.0, watchOS 2.0, tvOS 9.0, *)
|
|
extension Date : CustomDebugStringConvertible, CustomStringConvertible, CustomReflectable {
|
|
// For backwards compatibility, the Darwin version of this method is left alone
|
|
// because it uses `NSDateFormatter` and may behave slightly differently.
|
|
#if !FOUNDATION_FRAMEWORK
|
|
/// A string representation of the date object (read-only).
|
|
/// The representation is useful for debugging only.
|
|
/// There are a number of options to acquire a formatted string for a date including: date formatters
|
|
/// (see [NSDateFormatter](//apple_ref/occ/cl/NSDateFormatter) and
|
|
/// [Data Formatting Guide](//apple_ref/doc/uid/10000029i)), and the `Date`
|
|
/// function `description(locale:)`.
|
|
public var description: String {
|
|
// NSDate uses the constant format `uuuu-MM-dd HH:mm:ss '+0000'`
|
|
|
|
// Glibc needs a non-standard format option to pad %Y to 4 digits
|
|
#if canImport(Glibc) && !os(FreeBSD)
|
|
let format = "%4Y-%m-%d %H:%M:%S +0000"
|
|
#else
|
|
let format = "%Y-%m-%d %H:%M:%S +0000"
|
|
#endif
|
|
let unavailable = "<description unavailable>"
|
|
|
|
guard self >= Date.distantPast else {
|
|
return unavailable
|
|
}
|
|
guard self <= Date.distantFuture else {
|
|
return unavailable
|
|
}
|
|
|
|
var info = tm()
|
|
#if os(Windows)
|
|
var time = __time64_t(self.timeIntervalSince1970)
|
|
let errno: errno_t = _gmtime64_s(&info, &time)
|
|
guard errno == 0 else { return unavailable }
|
|
#else
|
|
var time = time_t(self.timeIntervalSince1970)
|
|
gmtime_r(&time, &info)
|
|
#endif
|
|
|
|
// This allocates stack space for range of 10^102 years
|
|
// That's more than Date currently supports.
|
|
let bufferSize = 128
|
|
return withUnsafeTemporaryAllocation(of: CChar.self, capacity: bufferSize) { buffer in
|
|
guard let ptr = buffer.baseAddress else {
|
|
return unavailable
|
|
}
|
|
|
|
guard strftime(ptr, bufferSize, format, &info) != 0 else {
|
|
return unavailable
|
|
}
|
|
|
|
guard let result = String(validatingUTF8: ptr) else {
|
|
return unavailable
|
|
}
|
|
|
|
return result
|
|
}
|
|
}
|
|
#endif // !FOUNDATION_FRAMEWORK
|
|
|
|
public var debugDescription: String {
|
|
return description
|
|
}
|
|
|
|
public var customMirror: Mirror {
|
|
let c: [(label: String?, value: Any)] = [
|
|
("timeIntervalSinceReferenceDate", timeIntervalSinceReferenceDate)
|
|
]
|
|
return Mirror(self, children: c, displayStyle: Mirror.DisplayStyle.struct)
|
|
}
|
|
}
|
|
|
|
@available(macOS 10.10, iOS 8.0, watchOS 2.0, tvOS 9.0, *)
|
|
extension Date : Codable {
|
|
public init(from decoder: Decoder) throws {
|
|
let container = try decoder.singleValueContainer()
|
|
let timestamp = try container.decode(Double.self)
|
|
self.init(timeIntervalSinceReferenceDate: timestamp)
|
|
}
|
|
|
|
public func encode(to encoder: Encoder) throws {
|
|
var container = encoder.singleValueContainer()
|
|
try container.encode(self.timeIntervalSinceReferenceDate)
|
|
}
|
|
}
|
|
|
|
// MARK: - Bridging
|
|
#if FOUNDATION_FRAMEWORK
|
|
@available(macOS 10.10, iOS 8.0, watchOS 2.0, tvOS 9.0, *)
|
|
extension Date : ReferenceConvertible, _ObjectiveCBridgeable {
|
|
public typealias ReferenceType = NSDate
|
|
|
|
@_semantics("convertToObjectiveC")
|
|
public func _bridgeToObjectiveC() -> NSDate {
|
|
return NSDate(timeIntervalSinceReferenceDate: _time)
|
|
}
|
|
|
|
public static func _forceBridgeFromObjectiveC(_ x: NSDate, result: inout Date?) {
|
|
if !_conditionallyBridgeFromObjectiveC(x, result: &result) {
|
|
fatalError("Unable to bridge \(_ObjectiveCType.self) to \(self)")
|
|
}
|
|
}
|
|
|
|
public static func _conditionallyBridgeFromObjectiveC(_ x: NSDate, result: inout Date?) -> Bool {
|
|
result = Date(timeIntervalSinceReferenceDate: x.timeIntervalSinceReferenceDate)
|
|
return true
|
|
}
|
|
|
|
@_effects(readonly)
|
|
public static func _unconditionallyBridgeFromObjectiveC(_ source: NSDate?) -> Date {
|
|
var result: Date?
|
|
_forceBridgeFromObjectiveC(source!, result: &result)
|
|
return result!
|
|
}
|
|
}
|
|
|
|
@available(macOS 10.10, iOS 8.0, watchOS 2.0, tvOS 9.0, *)
|
|
extension NSDate : _HasCustomAnyHashableRepresentation {
|
|
// Must be @nonobjc to avoid infinite recursion during bridging.
|
|
@nonobjc
|
|
public func _toCustomAnyHashable() -> AnyHashable? {
|
|
return AnyHashable(self as Date)
|
|
}
|
|
}
|
|
#endif // FOUNDATION_FRAMEWORK
|
|
|
|
// MARK: - Playground Support
|
|
#if FOUNDATION_FRAMEWORK && !NO_FORMATTERS
|
|
@available(macOS 10.10, iOS 8.0, watchOS 2.0, tvOS 9.0, *)
|
|
extension Date : _CustomPlaygroundQuickLookable {
|
|
var summary: String {
|
|
let df = DateFormatter()
|
|
df.dateStyle = .medium
|
|
df.timeStyle = .short
|
|
return df.string(from: self)
|
|
}
|
|
|
|
@available(*, deprecated, message: "Date.customPlaygroundQuickLook will be removed in a future Swift version")
|
|
public var customPlaygroundQuickLook: PlaygroundQuickLook {
|
|
return .text(summary)
|
|
}
|
|
}
|
|
#endif // FOUNDATION_FRAMEWORK
|
|
|
|
extension Date {
|
|
// Julian day 0 (-4713-01-01 12:00:00 +0000) in CFAbsoluteTime to 506713-02-07 00:00:00 +0000, smaller than the max time ICU supported.
|
|
package static let validCalendarRange = Date(timeIntervalSinceReferenceDate: TimeInterval(-211845067200.0))...Date(timeIntervalSinceReferenceDate: TimeInterval(15927175497600.0))
|
|
|
|
// aka __CFCalendarValidateAndCapTimeRange
|
|
package var capped: Date {
|
|
return max(min(self, Date.validCalendarRange.upperBound), Date.validCalendarRange.lowerBound)
|
|
}
|
|
|
|
package var isValidForEnumeration: Bool {
|
|
Date.validCalendarRange.contains(self)
|
|
}
|
|
}
|
|
|
|
@available(macOS 10.15, iOS 13.0, tvOS 13.0, watchOS 6.0, *)
|
|
extension Date {
|
|
public typealias Stride = TimeInterval
|
|
|
|
public func distance(to other: Date) -> TimeInterval {
|
|
return other.timeIntervalSinceReferenceDate - self.timeIntervalSinceReferenceDate
|
|
}
|
|
|
|
public func advanced(by n: TimeInterval) -> Date {
|
|
return self + n
|
|
}
|
|
}
|
|
|
|
@available(macOS 13, iOS 16, tvOS 16, watchOS 9, *)
|
|
extension Date: Strideable {
|
|
}
|