76 lines
1.8 KiB
Swift
76 lines
1.8 KiB
Swift
public struct Fen: CustomStringConvertible {
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public enum CastlingAvailibility: String {
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case Neither = "-"
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case WhiteKingSide = "K"
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case WhiteQueenSide = "Q"
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case BlackKingSide = "k"
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case BlackQueenSide = "q"
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case WhiteSide = "KQ"
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case BlackSide = "kq"
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case Kings = "Kk"
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case Queens = "Qq"
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case WKingBQueen = "Kq"
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case WQueenBKing = "Qk"
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case All = "KQkq"
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}
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private var _fen: String = ""
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private var value: String {
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get {
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return _fen
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}
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set {
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_fen = newValue
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let splitted = _fen.split(separator: " ")
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guard splitted.count == 6 else {
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return
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}
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placement = String(splitted[0])
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activeColor =
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switch splitted[1] {
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case "w": .White
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case "b": .Black
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default: .White
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}
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castlingAvailibility =
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CastlingAvailibility(
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rawValue:
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String(splitted[2])) ?? .Neither
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enPassant = String(splitted[3])
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halfMoveClock =
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if let c = splitted[4].first, c.isWholeNumber {
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UInt8(String(c)) ?? 0
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} else {
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0
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}
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fullMoveClock =
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if let c = splitted[5].first, c.isWholeNumber {
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UInt8(String(c)) ?? 1
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} else {
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1
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}
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}
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}
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public private(set) var placement: String = "" // 70 chars
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public private(set) var activeColor: Color = .White // 1 char
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public private(set) var castlingAvailibility: CastlingAvailibility = .All
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// 1 to 4 chars
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public private(set) var enPassant: String = "-" // 1 or 2 chars
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public private(set) var halfMoveClock: UInt8 = 0
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public package(set) var fullMoveClock: UInt8 = 1
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public init(fen value: String) {
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self.value = value
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}
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public enum FenError: Error {
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case InvalidCharacter(c: String, column: UInt8)
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case NumberTooBig(n: UInt8, column: UInt8)
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case NumberTooSmall(n: UInt8, column: UInt8)
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case NotAppropriateLength(n: UInt8, column: UInt8)
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}
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public var description: String {
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return value
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}
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} |