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Xcode 10
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124 changes: 124 additions & 0 deletions
124
Sources/XcodeProject/Objects/PBXGlobalID+Generator.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,124 @@ | ||
| // | ||
| // PBXGlobalID+Generator.swift | ||
| // XcodeProject | ||
| // | ||
| // Created by Geoffrey Foster on 2018-12-02. | ||
| // | ||
|
|
||
| import Foundation | ||
|
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| extension PBXGlobalID { | ||
| struct Generator { | ||
| private struct GlobalIdentifier: CustomStringConvertible { | ||
| let userHash: UInt8 | ||
| let pidByte: UInt8 | ||
| var random: UInt16 | ||
| var time: UInt32 | ||
| let zero: UInt8 = 0 | ||
| let hostShift: UInt8 | ||
| let hostHigh: UInt8 | ||
| let hostLow: UInt8 | ||
|
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| var description: String { | ||
| let components = [ | ||
| userHash.hexRepresentation, | ||
| pidByte.hexRepresentation, | ||
| random.hexRepresentation, | ||
| time.hexRepresentation, | ||
| zero.hexRepresentation, | ||
| hostShift.hexRepresentation, | ||
| hostHigh.hexRepresentation, | ||
| hostLow.hexRepresentation, | ||
| ] | ||
| return components.joined() | ||
| } | ||
| } | ||
|
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| private var gid: GlobalIdentifier | ||
|
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| private var randomSequence: UInt16 = 0 | ||
| private let referenceDateGenerator: () -> Date | ||
|
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| private var lastTime: UInt32 = 0 | ||
| private var firstSequence: UInt16 = 0 | ||
|
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| init(userName: String = NSUserName(), processId: pid_t = getpid(), random: inout RandomNumberGenerator, referenceDateGenerator: @escaping () -> Date = Generator.referenceDate) { | ||
| self.referenceDateGenerator = referenceDateGenerator | ||
|
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| var hostId: UInt32 = UInt32(gethostid()) | ||
| if hostId == 0 { | ||
| hostId = random.next() | ||
| } | ||
| self.gid = GlobalIdentifier( | ||
| userHash: Generator.userHash(userName: userName), | ||
| pidByte: UInt8(truncatingIfNeeded: processId), | ||
| random: random.next(), | ||
| time: 0, | ||
| hostShift: UInt8(truncatingIfNeeded: (hostId >> 0x10) & 0xff), | ||
| hostHigh: UInt8(truncatingIfNeeded: (hostId & 0xff00) >> 0x8), | ||
| hostLow: UInt8(truncatingIfNeeded: hostId & 0xff) | ||
| ) | ||
| } | ||
|
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| mutating func next() -> String { | ||
| let randomValue = gid.random + 1 | ||
|
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| let time = UInt32(referenceDateGenerator().timeIntervalSinceReferenceDate) | ||
| if time > lastTime { | ||
| firstSequence = randomValue | ||
| lastTime = time | ||
| } else if firstSequence == randomValue { | ||
| lastTime += 1 | ||
| } | ||
|
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| gid.random = randomValue | ||
| gid.time = lastTime | ||
|
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| return gid.description | ||
| } | ||
|
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| static func referenceDate() -> Date { | ||
| return Date() | ||
| } | ||
|
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| static func userHash(userName: String) -> UInt8 { | ||
| func hash(character: UnicodeScalar) -> UInt32 { | ||
| let uppercaseA: UnicodeScalar = "A" | ||
| let uppercaseZ: UnicodeScalar = "Z" | ||
| let lowercaseA: UnicodeScalar = "a" | ||
| let zero: UnicodeScalar = "0" | ||
| switch character { | ||
| case "A"..."Z": | ||
| return character.value - uppercaseA.value | ||
| case "a"..."z": | ||
| return character.value - lowercaseA.value | ||
| case "0"..."9": | ||
| return uppercaseZ.value - uppercaseA.value + 1 + (UInt32(character.value - zero.value) % 5) | ||
| default: | ||
| return 31 | ||
| } | ||
| } | ||
|
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| var userHash: UInt32 = 0 | ||
| var hashValue: UInt32 = 0 | ||
| userName.unicodeScalars.map { hash(character: $0) }.forEach { | ||
| var h = $0 | ||
| if h != 0 { | ||
| h = ((h << hashValue) >> 8) | (h << hashValue) | ||
| } | ||
| hashValue = (hashValue + 5) & 7 | ||
| userHash = userHash ^ h | ||
| } | ||
| return UInt8(truncatingIfNeeded: userHash) | ||
| } | ||
| } | ||
| } | ||
|
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| extension BinaryInteger { | ||
| var hexRepresentation: String { | ||
| let hex = String(self, radix: 16, uppercase: true) | ||
| let byteCount = bitWidth / 4 | ||
| let padding = max(byteCount - hex.count, 0) | ||
| return String(repeating: "0", count: padding) + hex | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,54 @@ | ||
| // | ||
| // PBXGlobalID.swift | ||
| // XcodeProject | ||
| // | ||
| // Created by Geoffrey Foster on 2018-12-02. | ||
| // | ||
|
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| import Foundation | ||
|
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| public struct PBXGlobalID: RawRepresentable { | ||
| public let rawValue: String | ||
|
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| public init(rawValue: String) { | ||
| self.rawValue = rawValue | ||
| } | ||
|
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| public init?(rawValue: String?) { | ||
| guard let rawValue = rawValue else { return nil } | ||
| self.init(rawValue: rawValue) | ||
| } | ||
|
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| public init() { | ||
| self.rawValue = PBXGlobalID.generator.next() | ||
| } | ||
|
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| static func ids(from strings: [String]?) -> [PBXGlobalID]? { | ||
| return strings?.compactMap { return PBXGlobalID(rawValue: $0) } | ||
| } | ||
|
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| private static var randomNumberGenerator: RandomNumberGenerator = SystemRandomNumberGenerator() | ||
| private static var generator: PBXGlobalID.Generator = PBXGlobalID.Generator(random: &randomNumberGenerator) | ||
| } | ||
|
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| extension PBXGlobalID: Hashable { | ||
| public var hashValue: Int { | ||
| return rawValue.hashValue | ||
| } | ||
|
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| public static func ==(lhs: PBXGlobalID, rhs: PBXGlobalID) -> Bool { | ||
| return lhs.rawValue == rhs.rawValue | ||
| } | ||
| } | ||
|
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| extension PBXGlobalID: Comparable { | ||
| public static func <(lhs: PBXGlobalID, rhs: PBXGlobalID) -> Bool { | ||
| return lhs.rawValue < rhs.rawValue | ||
| } | ||
| } | ||
|
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| extension PropertyList { | ||
| var globalID: PBXGlobalID? { | ||
| return PBXGlobalID(rawValue: self.string) | ||
| } | ||
| } |
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