public static double ParseHexFloat(string s)
{
try
{
if ((s.Length < 2) || (s[0] != '0' && (char.ToUpper(s[1]) != 'X')))
{
throw new InternalErrorException("hex float must start with '0x' near '{0}'", s);
}
s = s.Substring(2);
double value = 0.0;
int dummy, exp = 0;
s = LexerUtils.ReadHexProgressive(s, ref value, out dummy);
if (s.Length > 0 && s[0] == '.')
{
s = s.Substring(1);
s = LexerUtils.ReadHexProgressive(s, ref value, out exp);
}
exp *= -4;
if (s.Length > 0 && char.ToUpper(s[0]) == 'P')
{
if (s.Length == 1)
{
throw new InternalErrorException("invalid hex float format near '{0}'", s);
}
s = s.Substring(s[1] == '+' ? 2 : 1);
int exp1 = int.Parse(s, CultureInfo.InvariantCulture);
exp += exp1;
}
double result = value * Math.Pow(2, exp);
return(result);
}
catch (FormatException)
{
throw new InternalErrorException("malformed number near '{0}'", s);
}
}
