private IJSONItemNumber ReadItemNumber()
{
Debug.Assert(currentSource.currentChar == '-' || (currentSource.currentChar >= '0' && currentSource.currentChar <= '9'));
var num = new StringBuilder();
if (currentSource.currentChar == '-')
{
num.Append('-');
currentSource.ReadNextCharNoEOF();
}
if (currentSource.currentChar == '0')
{
num.Append('0');
currentSource.ReadNextChar();
}
else
{
if (currentSource.currentChar >= '1' && currentSource.currentChar <= '9')
{
while (currentSource.currentChar >= '0' && currentSource.currentChar <= '9')
{
num.Append((char)currentSource.currentChar);
currentSource.ReadNextChar();
}
}
else
{
throw new JSONUnexpectedCharException(currentSource.currentChar, currentSource.pos);
}
}
if (currentSource.currentChar == '.')
{
num.Append('.');
currentSource.ReadNextCharNoEOF();
if (currentSource.currentChar >= '0' && currentSource.currentChar <= '9')
{
while (currentSource.currentChar >= '0' && currentSource.currentChar <= '9')
{
num.Append((char)currentSource.currentChar);
currentSource.ReadNextChar();
}
}
else
{
throw new JSONUnexpectedCharException(currentSource.currentChar, currentSource.pos);
}
}
if (currentSource.currentChar == 'e' || currentSource.currentChar == 'E')
{
num.Append('E');
currentSource.ReadNextCharNoEOF();
if (currentSource.currentChar == '+' || currentSource.currentChar == '-')
{
if (currentSource.currentChar == '-')
{
num.Append((char)currentSource.currentChar);
}
currentSource.ReadNextCharNoEOF();
}
if (currentSource.currentChar >= '0' && currentSource.currentChar <= '9')
{
while (currentSource.currentChar >= '0' && currentSource.currentChar <= '9')
{
num.Append((char)currentSource.currentChar);
currentSource.ReadNextChar();
}
}
else
{
throw new JSONUnexpectedCharException(currentSource.currentChar, currentSource.pos);
}
}
return(currentDoc.CreateItemNumber(num.ToString()));
}
