private EcmaValue ParseInt(EcmaHeadObject obj, EcmaValue[] arg)
{
string inputString = arg[0].ToString(State);
var s = inputString.TrimStart();
var sign = 1;
if (!System.String.IsNullOrEmpty(s))
{
if (s[0] == '-')
{
sign = -1;
}
if (s[0] == '-' || s[0] == '+')
{
s = s.Substring(1);
}
}
var stripPrefix = true;
int radix = arg.Length > 1 ? arg[1].ToInt32(State) : 0;
if (radix == 0)
{
if (s.Length >= 2 && s.StartsWith("0x") || s.StartsWith("0X"))
{
radix = 16;
}
else
{
radix = 10;
}
}
else if (radix < 2 || radix > 36)
{
return(EcmaValue.Number(double.NaN));
}
else if (radix != 16)
{
stripPrefix = false;
}
if (stripPrefix && s.Length >= 2 && s.StartsWith("0x") || s.StartsWith("0X"))
{
s = s.Substring(2);
}
try
{
return(EcmaValue.Number(sign * Parse(s, radix)));
}
catch
{
return(EcmaValue.Number(double.NaN));
}
}
private EcmaValue ParseFloat(EcmaHeadObject obj, EcmaValue[] arg)
{
string input = arg[0].ToString(State).Trim();
if (input.StartsWith("Infinity"))
{
return(EcmaValue.Number(Double.PositiveInfinity));
}
StringBuilder builder = new StringBuilder();
int i = 0;
for (; i < input.Length; i++)
{
char c = input[i];
if (!EcmaChar.IsDigit(c))
{
break;
}
builder.Append(c);
}
if (i >= input.Length || input[i] != '.')
{
if (builder.Length == 0)
{
return(EcmaValue.Number(0));
}
return(EcmaValue.Number(Double.Parse(builder.ToString())));
}
builder.Append(".");
i++;
for (; i < input.Length; i++)
{
if (!EcmaChar.IsDigit(input[i]))
{
return(EcmaValue.Number(Double.Parse(builder.ToString())));
}
builder.Append(input[i]);
}
return(EcmaValue.Number(Double.Parse(builder.ToString())));
}