public virtual object ConvertToNumber(object value)
{
var type = NumericType;
if (type.IsInstanceOfType(value))
{
return(value);
}
if (value == null)
{
return(ConvertToNumber(0));
}
if (value is string)
{
if (type.Equals(typeof(Decimal)))
{
return(Decimal.Parse((string)value, AutoParseNumericStringsFormatProvider ?? CultureInfo.InvariantCulture));
}
if (type.Equals(typeof(Double)))
{
return((double)StringConversion.OptionallyConvertStringToDouble(value, AutoParseNumericStringsFormatProvider));
}
if (type.Equals(typeof(Single)))
{
return((float)(double)StringConversion.OptionallyConvertStringToDouble(value, AutoParseNumericStringsFormatProvider));
}
if (type.Equals(typeof(Int64)))
{
return(Int64.Parse((string)value, AutoParseNumericStringsFormatProvider ?? CultureInfo.InvariantCulture));
}
if (type.Equals(typeof(Int32)))
{
return(Int32.Parse((string)value, AutoParseNumericStringsFormatProvider ?? CultureInfo.InvariantCulture));
}
}
return(Convert.ChangeType(value, type));
}
public static Dictionary <string, EvalFunctionDelegate> GetDefaultGenericFunctions(
Type type, bool autoParseNumericStrings = true, IFormatProvider autoParseNumericStringsFormatProvider = null)
{
Func <object, object> argFilter;
if (autoParseNumericStrings)
{
argFilter = arg =>
{
return(StringConversion.OptionallyConvertStringToDouble(arg, autoParseNumericStringsFormatProvider));
};
}
else
{
argFilter = arg => arg;
}
return(new Dictionary <string, EvalFunctionDelegate>
{
{ "ABS", args => Convert.ChangeType(Math.Abs((dynamic)argFilter(args[0])), type) },
{ "ACOS", args => Convert.ChangeType(Math.Acos(Convert.ToDouble(argFilter(args[0]))), type) },
{ "ASIN", args => Convert.ChangeType(Math.Asin(Convert.ToDouble(argFilter(args[0]))), type) },
{ "ATAN", args => Convert.ChangeType(Math.Atan(Convert.ToDouble(argFilter(args[0]))), type) },
{ "ATAN2", args => Convert.ChangeType(Math.Atan2(Convert.ToDouble(argFilter(args[0])), Convert.ToDouble(argFilter(args[1]))), type) },
{ "CEILING", args => {
var arg = args[0];
if (arg is double)
{
return Convert.ChangeType(Math.Ceiling((double)arg), type);
}
if (arg is decimal)
{
return Convert.ChangeType(Math.Ceiling((decimal)arg), type);
}
return Convert.ChangeType(Math.Ceiling(Convert.ToDouble(argFilter(arg))), type);
} },
{ "COS", args => Convert.ChangeType(Math.Cos(Convert.ToDouble(argFilter(args[0]))), type) },
{ "COSH", args => Convert.ChangeType(Math.Cosh(Convert.ToDouble(argFilter(args[0]))), type) },
{ "EXP", args => Convert.ChangeType(Math.Exp(Convert.ToDouble(argFilter(args[0]))), type) },
{ "FLOOR", args => {
var arg = args[0];
if (arg is double)
{
return Convert.ChangeType(Math.Floor((double)arg), type);
}
if (arg is decimal)
{
return Convert.ChangeType(Math.Floor((decimal)arg), type);
}
return Convert.ChangeType(Math.Floor(Convert.ToDouble(argFilter(arg))), type);
} },
{ "LOG", args => {
if (args.Length == 2)
{
return Convert.ChangeType(Math.Log(Convert.ToDouble(argFilter(args[0])), Convert.ToDouble(argFilter(args[1]))), type);
}
return Convert.ChangeType(Math.Log(Convert.ToDouble(argFilter(args[0]))), type);
} },
{ "LOG2", args => Convert.ChangeType(Math.Log(Convert.ToDouble(argFilter(args[0])), 2), type) },
{ "LOG10", args => Convert.ChangeType(Math.Log10(Convert.ToDouble(argFilter(args[0]))), type) },
{ "MAX", args => {
if (args.Length == 0)
{
return null;
}
else
{
dynamic v = argFilter(args[0]);
if (v == null)
{
return null;
}
for (var i = 0; i < args.Length; i++)
{
dynamic v2 = argFilter(args[i]);
if (v2 == null)
{
return null;
}
if (v2.CompareTo(v) > 0)
{
v = v2;
}
}
return v;
}
} },
{ "MIN", args => {
if (args.Length == 0)
{
return null;
}
else
{
dynamic v = argFilter(args[0]);
if (v == null)
{
return null;
}
for (var i = 0; i < args.Length; i++)
{
dynamic v2 = argFilter(args[i]);
if (v2 == null)
{
return null;
}
if (v2.CompareTo(v) < 0)
{
v = v2;
}
}
return v;
}
} },
{ "POW", args => Convert.ChangeType(Math.Pow(Convert.ToDouble(argFilter(args[0])), Convert.ToDouble(argFilter(args[1]))), type) },
{ "ROUND", args => {
var arg = args[0];
if (arg is double)
{
return Convert.ChangeType(Math.Round((double)arg), type);
}
if (arg is decimal)
{
return Convert.ChangeType(Math.Round((decimal)arg), type);
}
return Convert.ChangeType(Math.Round(Convert.ToDouble(argFilter(arg))), type);
} },
{ "SIGN", args => Convert.ChangeType(Math.Sign((dynamic)argFilter(args[0])), type) },
{ "SIN", args => Convert.ChangeType(Math.Sin(Convert.ToDouble(argFilter(args[0]))), type) },
{ "SINH", args => Convert.ChangeType(Math.Sinh(Convert.ToDouble(argFilter(args[0]))), type) },
{ "SQRT", args => Convert.ChangeType(Math.Sqrt(Convert.ToDouble(argFilter(args[0]))), type) },
{ "TAN", args => Convert.ChangeType(Math.Tan(Convert.ToDouble(argFilter(args[0]))), type) },
{ "TANH", args => Convert.ChangeType(Math.Tanh(Convert.ToDouble(argFilter(args[0]))), type) },
{ "TRUNCATE", args => {
var arg = args[0];
if (arg is double)
{
return Convert.ChangeType(Math.Truncate((double)arg), type);
}
if (arg is decimal)
{
return Convert.ChangeType(Math.Truncate((decimal)arg), type);
}
return Convert.ChangeType(Math.Truncate(Convert.ToDouble(argFilter(arg))), type);
} },
});
}
