public void CalculateCrcForSingleCommand()
{
var data = new byte[] { 0x09 };
var crc = CheckSumCalculator.Calculate(data);
Assert.Equal(0xD7, crc.High);
Assert.Equal(0xEB, crc.Low);
}
public void CalculateCrcForLongCommand()
{
var data = new byte[] { 0x1C, 0xD7, 0x09 };
var crc = CheckSumCalculator.Calculate(data);
Assert.Equal(0x5E, crc.High);
Assert.Equal(0x13, crc.Low);
}
public void Return_The_CheckSum_Of_The_Puzzle_Entered()
{
List <string> rowsList = new List <string> {
"5 1 9 5", "7 5 3", "2 4 6 8"
};
CheckSumCalculator checkSumCalculator = new CheckSumCalculator(rowsList);
Check.That(checkSumCalculator.Calculate()).IsEqualTo(18);
}
public IValidationResult Validate(Entity entity)
{
var weights = new[] { 1, 3, 7, 9, 1, 3, 7, 9, 1, 3 };
var calculator = new CheckSumCalculator();
var checkSum = calculator.Calculate(weights, entity.Pesel.Substring(0, 10));
if (checkSum == (int)char.GetNumericValue(entity.Pesel[10]))
{
entity.PeselStruct.ControlNumber = Convert.ToByte(checkSum);
return(new OkValidationResult());
}
return(new InvalidCheckSumValidationResult());
}
public ArraySegment <byte> Read()
{
SkipBeginMarker();
var content = ReadContent().ToArray();
var crc = CheckSumCalculator.Calculate(content, 0, content.Length - 2);
if (crc.High != content[content.Length - 2] || crc.Low != content[content.Length - 1])
{
throw new InvalidDataException("CRC verification failed");
}
var result = new ArraySegment <byte>(content, 0, content.Length - 2);
return(result);
}
private async Task Write(byte[] packet, CancellationToken token)
{
stream.WriteByte(frameSynchronizationMarker);
stream.WriteByte(frameSynchronizationMarker);
foreach (var b in packet)
{
stream.WriteByte(b);
if (b == frameSynchronizationMarker)
{
stream.WriteByte(0xF0);
}
}
var crc = CheckSumCalculator.Calculate(packet);
stream.WriteByte(crc.High);
stream.WriteByte(crc.Low);
stream.WriteByte(frameSynchronizationMarker);
stream.WriteByte(frameCompletedMarker);
await stream.FlushAsync(token);
}