mirror of
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140 lines
6.3 KiB
Swift
140 lines
6.3 KiB
Swift
//===----------------------------------------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#if FOUNDATION_FRAMEWORK
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// FIXME: one day this will be bridged from CoreFoundation and we
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// should drop it here. <rdar://problem/14497260> (need support
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// for CF bridging)
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@available(macOS 10.10, iOS 8.0, watchOS 2.0, tvOS 9.0, *)
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public var kCFStringEncodingASCII: CFStringEncoding { return 0x0600 }
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#endif // FOUNDATION_FRAMEWORK
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@available(macOS 10.10, iOS 8.0, watchOS 2.0, tvOS 9.0, *)
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extension String {
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#if !FOUNDATION_FRAMEWORK
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// This is a workaround for Clang importer's ambiguous lookup issue since
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// - Swift doesn't allow typealias to nested type
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// - Swift doesn't allow typealias to builtin types like String
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// We therefore rename String.Encoding to String._Encoding for package
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// internal use so we can use `String._Encoding` to disambiguate.
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public typealias Encoding = _Encoding
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public struct _Encoding : RawRepresentable, Sendable, Equatable {
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public var rawValue: UInt
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public init(rawValue: UInt) { self.rawValue = rawValue }
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public static let ascii = Self(rawValue: 1)
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public static let nextstep = Self(rawValue: 2)
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public static let japaneseEUC = Self(rawValue: 3)
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public static let utf8 = Self(rawValue: 4)
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public static let isoLatin1 = Self(rawValue: 5)
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public static let symbol = Self(rawValue: 6)
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public static let nonLossyASCII = Self(rawValue: 7)
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public static let shiftJIS = Self(rawValue: 8)
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public static let isoLatin2 = Self(rawValue: 9)
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public static let unicode = Self(rawValue: 10)
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public static let windowsCP1251 = Self(rawValue: 11)
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public static let windowsCP1252 = Self(rawValue: 12)
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public static let windowsCP1253 = Self(rawValue: 13)
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public static let windowsCP1254 = Self(rawValue: 14)
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public static let windowsCP1250 = Self(rawValue: 15)
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public static let iso2022JP = Self(rawValue: 21)
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public static let macOSRoman = Self(rawValue: 30)
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public static let utf16 = Self.unicode
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public static let utf16BigEndian = Self(rawValue: 0x90000100)
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public static let utf16LittleEndian = Self(rawValue: 0x94000100)
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public static let utf32 = Self(rawValue: 0x8c000100)
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public static let utf32BigEndian = Self(rawValue: 0x98000100)
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public static let utf32LittleEndian = Self(rawValue: 0x9c000100)
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}
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#else
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public struct Encoding : RawRepresentable, Sendable {
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public var rawValue: UInt
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public init(rawValue: UInt) { self.rawValue = rawValue }
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public static let ascii = Encoding(rawValue: 1)
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public static let nextstep = Encoding(rawValue: 2)
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public static let japaneseEUC = Encoding(rawValue: 3)
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public static let utf8 = Encoding(rawValue: 4)
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public static let isoLatin1 = Encoding(rawValue: 5)
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public static let symbol = Encoding(rawValue: 6)
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public static let nonLossyASCII = Encoding(rawValue: 7)
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public static let shiftJIS = Encoding(rawValue: 8)
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public static let isoLatin2 = Encoding(rawValue: 9)
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public static let unicode = Encoding(rawValue: 10)
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public static let windowsCP1251 = Encoding(rawValue: 11)
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public static let windowsCP1252 = Encoding(rawValue: 12)
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public static let windowsCP1253 = Encoding(rawValue: 13)
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public static let windowsCP1254 = Encoding(rawValue: 14)
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public static let windowsCP1250 = Encoding(rawValue: 15)
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public static let iso2022JP = Encoding(rawValue: 21)
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public static let macOSRoman = Encoding(rawValue: 30)
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public static let utf16 = Encoding.unicode
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public static let utf16BigEndian = Encoding(rawValue: 0x90000100)
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public static let utf16LittleEndian = Encoding(rawValue: 0x94000100)
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public static let utf32 = Encoding(rawValue: 0x8c000100)
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public static let utf32BigEndian = Encoding(rawValue: 0x98000100)
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public static let utf32LittleEndian = Encoding(rawValue: 0x9c000100)
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}
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// For internal usage to disambiguate
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internal typealias _Encoding = Encoding
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public typealias EncodingConversionOptions = NSString.EncodingConversionOptions
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public typealias EnumerationOptions = NSString.EnumerationOptions
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#endif // FOUNDATION_FRAMEWORK
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}
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#if FOUNDATION_FRAMEWORK
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@available(macOS 10.10, iOS 8.0, watchOS 2.0, tvOS 9.0, *)
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extension String.Encoding : Hashable {
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public var hashValue: Int {
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// Note: This is effectively the same hashValue definition that
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// RawRepresentable provides on its own. We only need to keep this to
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// ensure ABI compatibility with 5.0.
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return rawValue.hashValue
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}
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@_alwaysEmitIntoClient // Introduced in 5.1
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public func hash(into hasher: inout Hasher) {
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// Note: `hash(only:)` is only defined here because we also define
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// `hashValue`.
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//
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// In 5.0, `hash(into:)` was resolved to RawRepresentable's functionally
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// equivalent definition; we added this definition in 5.1 to make it
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// clear this `hash(into:)` isn't synthesized by the compiler.
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// (Otherwise someone may be tempted to define it, possibly breaking the
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// hash encoding and thus the ABI. RawRepresentable's definition is
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// inlinable.)
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hasher.combine(rawValue)
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}
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public static func ==(lhs: String.Encoding, rhs: String.Encoding) -> Bool {
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// Note: This is effectively the same == definition that
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// RawRepresentable provides on its own. We only need to keep this to
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// ensure ABI compatibility with 5.0.
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return lhs.rawValue == rhs.rawValue
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}
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}
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@available(macOS 10.10, iOS 8.0, watchOS 2.0, tvOS 9.0, *)
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extension String.Encoding : CustomStringConvertible {
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public var description: String {
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#if FOUNDATION_FRAMEWORK
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return String.localizedName(of: self)
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#else
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return "\(self)"
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#endif
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}
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}
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#endif
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