|
private GrabInt ( |
||
| sb | The CharBuffer to append to. | |
| allowPlus | bool | Whether or not to consider + to be part /// of an integer. |
| thisChar | char | The last character read by this method. |
| return | bool | |
private bool GrabInt(CharBuffer sb, bool allowPlus, out char thisChar)
{
tmpSb.Clear(); // use tmp CharBuffer
// first character can be -, maybe can be + depending on arg
thisChar = (char)GetNextChar();
if (thisChar == Eof)
{
return (false);
}
else if (thisChar == '+')
{
if (allowPlus)
{
tmpSb.Append(thisChar);
}
else
{
backString.Append(thisChar);
return (false);
}
}
else if (thisChar == '-')
{
tmpSb.Append(thisChar);
}
else if (settings.IsCharType(thisChar, CharTypeBits.Digit))
{
// a digit, back this out so we can handle it in loop below
backString.Append(thisChar);
}
else
{
// not a number starter
backString.Append(thisChar);
return (false);
}
// rest of chars have to be digits
bool gotInt = false;
while (((thisChar = (char)GetNextChar()) != Eof)
&& (settings.IsCharType(thisChar, CharTypeBits.Digit)))
{
gotInt = true;
tmpSb.Append(thisChar);
}
if (gotInt)
{
sb.Append(tmpSb);
#if DEBUG
log.Debug("Grabbed int {0}, sb = {1}", tmpSb, sb);
#endif
return (true);
}
else
{
// didn't get any chars after first
backString.Append(tmpSb); // put + or - back on
if (thisChar != Eof) backString.Append(thisChar);
return (false);
}
}