public static ParseResult <JNumber> ParseFirstNumber(Substring encoded)
{
int i = LeadingWhiteSpaceCount(encoded);
int numberStart = i;
if (encoded[i] == '-')
{
i++;
}
else if (!IsDigit(encoded[i]))
{
throw new System.ArgumentException("No number found!");
}
bool inFraction = false;
bool inExponent = false;
bool digitRead = false;
bool fractionDigitRead = false;
bool exponentDigitRead = false;
while (i < encoded.Length)
{
char c = encoded[i];
if (IsDigit(c))
{
i++;
digitRead = true;
if (inFraction)
{
fractionDigitRead = true;
}
if (inExponent)
{
exponentDigitRead = true;
}
continue;
}
else if (!inExponent && !inFraction && digitRead && c == '.')
{
inFraction = true;
}
else if (c == 'E' || c == 'e')
{
inFraction = false;
inExponent = true;
}
else if (inExponent && !exponentDigitRead && (c == '+' | c == '-'))
{
i++;
continue;
}
else
{
// We read something other than a valid character for a number
break;
}
i++;
}
if (!digitRead)
{
throw new System.ArgumentException("No digits found! " + encoded.ToString());
}
if (inFraction && !fractionDigitRead)
{
throw new System.ArgumentException("Fraction not terminated " + encoded.ToString());
}
if (inExponent && !exponentDigitRead)
{
throw new System.ArgumentException("Exponent not terminated " + encoded.ToString());
}
JNumber token = null;
string numberAsString = encoded.SubSubstring(numberStart, i - numberStart).ToString();
if (fractionDigitRead || exponentDigitRead)
{
float result;
var style = System.Globalization.NumberStyles.Float;
var culture = System.Globalization.CultureInfo.CreateSpecificCulture("en-US");
if (!float.TryParse(numberAsString, style, culture, out result))
{
throw new System.ArgumentException("Unable to parse number from JSON: " + encoded.ToString());
}
token = new JNumber(result);
}
else
{
int result;
if (!int.TryParse(numberAsString, out result))
{
throw new System.ArgumentException("Unable to parse number from JSON: " + encoded.ToString());
}
token = new JNumber(result);
}
return(new ParseResult <JNumber> {
Token = token,
SubstringLength = i
});
}
public void Set(string key, int number)
{
this[key] = new JNumber(number);
}
