/// <summary>
/// Validate if the digit exists on the numeric system.
/// </summary>
public static bool isValidDigit(this NumericSystemType numericSystem, string digit)
{
string pattern = null;
switch (numericSystem)
{
case NumericSystemType.BINARY:
pattern = @"[0-1]";
break;
case NumericSystemType.OCTAL:
pattern = @"[0-7]";
break;
case NumericSystemType.DECIMAL:
pattern = @"[0-9]";
break;
case NumericSystemType.HEXADECIMAL:
pattern = @"[0-9a-fA-F]";
break;
default:
var message = string.Format("Digit {0} is not supported on current system: {1}", digit, numericSystem);
throw new CalculatorException(message);
}
Match match = Regex.Match(digit, pattern, RegexOptions.IgnoreCase);
return(match.Success);
}
/// <summary>
/// Validate that the operation is valid based on the numeric system type.
/// </summary>
public static bool IsValidOperation(this NumericSystemType numericSystemType, OperationType operationType)
{
if (operationType == OperationType.INVERSE)
{
return(numericSystemType == NumericSystemType.BINARY);
}
return(true);
}
/// <summary>
/// Converts a number from decimal number to its representation on other numeric system base.
/// </summary>
public static string ConvertFromDecimal(this NumericSystemType currentSystemType, string number)
{
if (currentSystemType == NumericSystemType.DECIMAL)
{
return(number);
}
var baseNumber = currentSystemType.GetBaseRepresentation();
return(Convert.ToString(Convert.ToInt64(number), baseNumber));
}
/// <summary>
/// Returns the number of the base based on the numeric system.
/// </summary>
public static int GetBaseRepresentation(this NumericSystemType numericSystemType)
{
switch (numericSystemType)
{
case NumericSystemType.BINARY:
return(2);
case NumericSystemType.OCTAL:
return(8);
case NumericSystemType.DECIMAL:
return(10);
case NumericSystemType.HEXADECIMAL:
return(16);
default:
throw new CalculatorException("Unknown numeric system: " + numericSystemType);
}
}
