https://github.com/DingSoung/CRC/tree/d6eadb1ecc6f62c2ba7308ca061041bebd7b7f62
final class CRC8 {
static let poly = 0x07
static let mask = 0xff
static let table: [UInt8] = {
var table = Array.init(repeating: UInt8(0), count: 256)
for i in 0..<table.count {
var c = i
for _ in 0..<8 {
if c & 0x80 != 0 {
c = (((c << 1) & mask) ^ poly)
} else {
c <<= 1
}
}
table[i] = UInt8(c)
}
return table
}()
static func makeCRC8(string: String) -> UInt8 {
guard let data = string.data(using: String.Encoding.utf8) else { return 0 }
return makeCRC8(data: data)
}
static func makeCRC8(data: Data) -> UInt8 {
let dataArray = [UInt8](data)
var crc8:UInt8 = 0x00
for i in 0..<dataArray.count {
crc8 = table[Int(crc8 ^ dataArray[i])]
}
return crc8
}
static func makeCRC8(data: [UInt8]) -> UInt8 {
var crc8:UInt8 = 0x00
for i in 0..<data.count {
crc8 = table[Int(crc8 ^ data[i])]
}
return crc8
}
private init() {
}
}
