Name: gm110360 Date: 07/15/2002


FULL PRODUCT VERSION :
java version "1.4.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-b92)
Java HotSpot(TM) Client VM (build 1.4.0-b92, mixed mode)


FULL OPERATING SYSTEM VERSION :
suse linux 7.3

A DESCRIPTION OF THE PROBLEM :
The documenatation for digit is insufficient. It does not
describe behaviour on fullwidth latin characters, like
getNumericalValue does.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Read the API for java.lang.Character.digit
2. Read the API for java.lang.Character.getNumericalValue
3. Realize there is a divergence

This bug can be reproduced always.
(Review ID: 146953)
======================================================================
Due to this CR the current behaviour of Character.digit(int/char, int) contradicts to the specification.
The following test is based on the specification and fails for full width latin characters variants:
-----------------------------------------------------------------
public class DigitMiniTest {
    public static void main(String[] args) {
        int radix = 11;

        for (int cp = 0; cp <= Character.MAX_VALUE; cp++) {
            int result = Character.digit(cp, radix);
            int expected = -1;

            if (Character.isDigit(cp)) {
                expected = Character.getNumericValue(cp);

                if (expected >= radix) {
                    expected = -1;
                }
            } else if ('a' <= cp && cp <= 'z' && cp < (radix + 'a' - 10)) {
                expected = cp - 'a' + 10;
            } else if ('A' <= cp && cp <= 'Z' && cp < (radix + 'A' - 10)) {
                expected = cp - 'A' + 10;
            }
            
            if (result != expected) {
                System.out.println("Invalid value: " + result + " instead of "
                        + expected + " for 0x" + Integer.toHexString(cp));
            }
        }
    }
};
-----------------------------------------------------------------
The output is:
Invalid value: 10 instead of -1 for 0xff21
Invalid value: 10 instead of -1 for 0xff41
-----------------------------------------------------------------