init()

in Sources/OSS/Utils/CRC64.swift [10:40]

• 28 lines of code
• 9 McCabe index (conditional complexity)

    init() {
        let n: Int64 = 1
        isLittleEndian = (n == n.littleEndian)

        var crc: UInt64
        var table = [[UInt64]](repeating: [UInt64](repeating: 0, count: 256), count: 8)
        for n in 0 ..< 256 {
            crc = UInt64(n)
            for _ in 0 ..< 8 {
                crc = ((crc & 1) != 0) ? poly ^ (crc >> 1) : crc >> 1
            }
            table[0][n] = crc
        }

        for n in 0 ..< 256 {
            crc = table[0][n]
            for k in 1 ..< 8 {
                crc = table[0][Int(crc & 0xFF)] ^ (crc >> 8)
                table[k][n] = crc
            }
        }
        self.table = table

        if !isLittleEndian {
            for k in 0 ..< 8 {
                for n in 0 ..< 256 {
                    table[k][n] = rev8(a: table[k][n])
                }
            }
        }
    }