private Number parseNumber(int max, String string, ParsePosition position) {
int length = string.length();
int index = position.getIndex();
if (max > 0 && max < length - index) {
length = index + max;
}
while (index < length && (string.charAt(index) == ' ' || string.charAt(index) == '\t')) {
++index;
}
if (max == 0) {
position.setIndex(index);
Number n = numberFormat.parse(string, position);
// In RTL locales, NumberFormat might have parsed "2012-" in an ISO date as the
// negative number -2012.
// Ideally, we wouldn't have this broken API that exposes a NumberFormat and expects
// us to use it. The next best thing would be a way to ask the NumberFormat to parse
// positive numbers only, but icu4c supports negative (BCE) years. The best we can do
// is try to recognize when icu4c has done this, and undo it.
if (n != null && n.longValue() < 0) {
if (numberFormat instanceof DecimalFormat) {
DecimalFormat df = (DecimalFormat) numberFormat;
char lastChar = string.charAt(position.getIndex() - 1);
char minusSign = df.getDecimalFormatSymbols().getMinusSign();
if (lastChar == minusSign) {
n = Long.valueOf(-n.longValue()); // Make the value positive.
position.setIndex(position.getIndex() - 1); // Spit out the negative sign.
}
}
}
return n;
}
int result = 0;
int digit;
while (index < length && (digit = Character.digit(string.charAt(index), 10)) != -1) {
result = result * 10 + digit;
++index;
}
if (index == position.getIndex()) {
position.setErrorIndex(index);
return null;
}
position.setIndex(index);
return Integer.valueOf(result);
}
