public static bool IsPrime(dynamic a)
{
#if !NET_STANDARD_2_0
double resultA = DynamicCast.ConvertToDouble(a);
// http://en.wikipedia.org/wiki/Primality_test#Naive_methods
if (Math.Abs(resultA - 2.0) < Tolerance || Math.Abs(resultA - 3.0) < Tolerance)
{
return(true);
}
// False if n is NaN, negative, is 1, or not whole. And false if n is divisible by 2 or 3.
if (
double.IsNaN(resultA) || resultA <= 1 || Math.Abs(resultA % 1) > Tolerance || Math.Abs(resultA % 2) < Tolerance || Math.Abs(resultA % 3) < Tolerance)
{
return(false);
}
// Check all the numbers of form 6k +/- 1, up to sqrt(n).
for (var x = 6; x <= Math.Sqrt(resultA) + 1; x += 6)
{
if (Math.Abs(resultA % (x - 1)) < Tolerance || Math.Abs(resultA % (x + 1)) < Tolerance)
{
return(false);
}
}
return(true);
#else
throw new WrongApiCompatibilityLevelException();
#endif
}
public static dynamic Pow10(dynamic a)
{
#if !NET_STANDARD_2_0
double resultA = DynamicCast.ConvertToDouble(a);
return(Math.Pow(10.0, resultA));
#else
throw new WrongApiCompatibilityLevelException();
#endif
}
public static bool IsNegative(dynamic a)
{
#if !NET_STANDARD_2_0
double resultA = DynamicCast.ConvertToDouble(a);
return(resultA < 0);
#else
throw new WrongApiCompatibilityLevelException();
#endif
}
public static bool IsWhole(dynamic a)
{
#if !NET_STANDARD_2_0
double resultA = DynamicCast.ConvertToDouble(a);
return(Math.Abs(resultA % 1) < Tolerance);
#else
throw new WrongApiCompatibilityLevelException();
#endif
}
public static dynamic Atan(dynamic a)
{
#if !NET_STANDARD_2_0
double resultA = DynamicCast.ConvertToDouble(a);
return(Math.Atan(resultA) / Math.PI * 180);
#else
throw new WrongApiCompatibilityLevelException();
#endif
}
public static string Substring(dynamic text, string where1, dynamic at1, string where2, dynamic at2)
{
#if !NET_STANDARD_2_0
string resultText = ConvertToString(text);
int at1Result = DynamicCast.ConvertToInt(at1);
int at2Result = DynamicCast.ConvertToInt(at2);
var getAt = new Func <dynamic, int, int>((where, at) =>
{
switch (@where)
{
case "FROM_START":
at--;
break;
case "FROM_END":
at = resultText.Length - at;
break;
case "FIRST":
at = 0;
break;
case "LAST":
at = resultText.Length - 1;
break;
default:
throw new ApplicationException("Unhandled option (GetSubstring).");
}
return(at);
});
at1 = getAt(where1, at1Result);
at2 = getAt(where2, at2Result) + 1;
try
{
return(resultText.Substring(at1, at2 - at1));
}
catch (Exception e)
{
Log($"Can not get Substring({at1}, {at2 - at1}); for {resultText}.");
return("");
}
#else
throw new WrongApiCompatibilityLevelException();
#endif
}
public static dynamic Sum(dynamic a, dynamic b)
{
#if !NET_STANDARD_2_0
double resultA = DynamicCast.ConvertToDouble(a);
double resultB = DynamicCast.ConvertToDouble(b);
return(resultA + resultB);
#else
throw new WrongApiCompatibilityLevelException();
#endif
}
public static dynamic RandomInt(dynamic a, dynamic b)
{
#if !NET_STANDARD_2_0
int resultA = DynamicCast.ConvertToInt(a);
int resultB = DynamicCast.ConvertToInt(b);
return(resultA < resultB?Utils.RandomInt(resultA, resultB) : Utils.RandomInt(resultB, resultA));
#else
throw new WrongApiCompatibilityLevelException();
#endif
}
public static dynamic RoundDown(dynamic a)
{
#if !NET_STANDARD_2_0
double resultA = DynamicCast.ConvertToDouble(a);
resultA -= 0.5d;
return(Math.Round(resultA));
#else
throw new WrongApiCompatibilityLevelException();
#endif
}
public static bool DivisionBy(dynamic a, dynamic divisionBy)
{
#if !NET_STANDARD_2_0
double resultA = DynamicCast.ConvertToDouble(a);
double resultDivisionBy = DynamicCast.ConvertToDouble(divisionBy);
return(Math.Abs(resultA % resultDivisionBy) < Tolerance);
#else
throw new WrongApiCompatibilityLevelException();
#endif
}
public static char GetLetterFromEnd(dynamic text, dynamic index)
{
#if !NET_STANDARD_2_0
string resultText = ConvertToString(text);
int resultIndex = DynamicCast.ConvertToInt(index);
if (string.IsNullOrEmpty(resultText) || resultIndex == 0)
{
return('\0');
}
return(resultText.Length - resultIndex > 0 ? resultText[resultText.Length - resultIndex] : '\0');
#else
throw new WrongApiCompatibilityLevelException();
#endif
}
public static dynamic Division(dynamic a, dynamic b)
{
#if !NET_STANDARD_2_0
double resultA = DynamicCast.ConvertToDouble(a);
double resultB = DynamicCast.ConvertToDouble(b);
if (Math.Abs(resultB) < Tolerance)
{
return(double.PositiveInfinity);
}
return(resultA / resultB);
#else
throw new WrongApiCompatibilityLevelException();
#endif
}
