private byte ReadDigits(byte firstCode)
{
if (!GraphQLConstants.IsDigit(firstCode))
{
throw new SyntaxException(this,
"Invalid number, expected digit but got: " +
$"`{(char)firstCode}` ({firstCode}).");
}
byte code = firstCode;
while (true)
{
if (++_position >= _length)
{
code = GraphQLConstants.Space;
break;
}
code = _graphQLData[_position];
if (!GraphQLConstants.IsDigit(code))
{
break;
}
}
return(code);
}
private void ReadNumberToken(byte firstCode)
{
int start = _position;
byte code = firstCode;
var isFloat = false;
if (code == GraphQLConstants.Minus)
{
code = _graphQLData[++_position];
}
if (code == GraphQLConstants.Zero && !IsEndOfStream(_position + 1))
{
code = _graphQLData[++_position];
if (GraphQLConstants.IsDigit(code))
{
throw new SyntaxException(this,
"Invalid number, unexpected digit after 0: " +
$"`{(char)code}` ({code}).");
}
}
else
{
code = ReadDigits(code);
}
if (code == GraphQLConstants.Dot)
{
isFloat = true;
_floatFormat = Language.FloatFormat.FixedPoint;
code = _graphQLData[++_position];
code = ReadDigits(code);
}
if ((code | 0x20) == GraphQLConstants.E)
{
isFloat = true;
_floatFormat = Language.FloatFormat.Exponential;
code = _graphQLData[++_position];
if (code == GraphQLConstants.Plus ||
code == GraphQLConstants.Minus)
{
code = _graphQLData[++_position];
}
ReadDigits(code);
}
_kind = isFloat ? TokenKind.Float : TokenKind.Integer;
_start = start;
_end = _position;
_value = _graphQLData.Slice(start, _position - start);
}