[kaffe] Re: GregorianCalendar fixes

Ito Kazumitsu kaz at maczuka.gcd.org
Thu Nov 27 08:08:02 PST 2003


Hi,

>>>>> ":" == Mark Wielaard <mark at klomp.org> writes:

:> Looked some more at the code and I see now that the the first change was
:> inside a if (time >= gregorianCutover) so it now makes more sense to me.
:> And the second change seems correct given the above remark.
:> I'll commit it in Classpath.

There is another difference between GNU Classpath's
java/util/GregorianCalendar.java and that of kaffe.

Kaffe's was imported from GNU Classpath and modified
in the kaffe world, as described by the following
ChangeLog entry.

2003-08-16  Guilhem Lavaux <guilhem at kaffe.org>

	* java/util/GregorianCalendar.java (computeTime):
	12:00 midnight is AM and 12:00 noon is PM.

Here is the patch that can be applied to Revision 1.21:

--- java/util/GregorianCalendar.java.orig	Thu Nov 27 15:35:08 2003
+++ java/util/GregorianCalendar.java	Thu Nov 27 15:48:25 2003
@@ -402,7 +402,11 @@
       {
 	hour = fields[HOUR];
         if (isSet[AM_PM] && fields[AM_PM] == PM)
-	  hour += 12;
+	  if (hour != 12) /* not Noon */
+            hour += 12;
+	/* Fix the problem of the status of 12:00 AM (midnight). */
+	if (isSet[AM_PM] && fields[AM_PM] == AM && hour == 12)
+	  hour = 0;
       }
 
     int minute = isSet[MINUTE] ? fields[MINUTE] : 0;

A mauve test attached. Since I have got a write access to the
mauve CVS registry,  I will add it to the registry.  The test
results shows that Sun's implementation also seems to have
something wrong.

Here is the output of the tests.

Kaffe + kaffe's GregorianCalendar
gnu.testlet.java.util.Calendar.ampm
----
PASS: gnu.testlet.java.util.Calendar.ampm (number 1)
PASS: gnu.testlet.java.util.Calendar.ampm (number 2)
PASS: gnu.testlet.java.util.Calendar.ampm (number 3)
PASS: gnu.testlet.java.util.Calendar.ampm (number 4)
PASS: gnu.testlet.java.util.Calendar.ampm (number 5)
PASS: gnu.testlet.java.util.Calendar.ampm (number 6)
PASS: gnu.testlet.java.util.Calendar.ampm (number 7)
PASS: gnu.testlet.java.util.Calendar.ampm (number 8)
PASS: gnu.testlet.java.util.Calendar.ampm (number 9)
PASS: gnu.testlet.java.util.Calendar.ampm (number 10)
PASS: gnu.testlet.java.util.Calendar.ampm (number 11)
PASS: gnu.testlet.java.util.Calendar.ampm (number 12)
PASS: gnu.testlet.java.util.Calendar.ampm (number 13)
PASS: gnu.testlet.java.util.Calendar.ampm (number 14)
PASS: gnu.testlet.java.util.Calendar.ampm (number 15)
PASS: gnu.testlet.java.util.Calendar.ampm (number 16)
0 of 16 tests failed

Kaffe + GNU Classpath's GregorianCalendar
gnu.testlet.java.util.Calendar.ampm
----
FAIL: gnu.testlet.java.util.Calendar.ampm (number 1)
got 12:00 PM but expected 12:00 AM
FAIL: gnu.testlet.java.util.Calendar.ampm (number 2)
got 12:00 PM but expected 12:00 AM
FAIL: gnu.testlet.java.util.Calendar.ampm (number 3)
got 12:10 PM but expected 12:10 AM
FAIL: gnu.testlet.java.util.Calendar.ampm (number 4)
got 12:10 PM but expected 12:10 AM
PASS: gnu.testlet.java.util.Calendar.ampm (number 5)
PASS: gnu.testlet.java.util.Calendar.ampm (number 6)
PASS: gnu.testlet.java.util.Calendar.ampm (number 7)
PASS: gnu.testlet.java.util.Calendar.ampm (number 8)
FAIL: gnu.testlet.java.util.Calendar.ampm (number 9)
got 12:00 AM but expected 12:00 PM
FAIL: gnu.testlet.java.util.Calendar.ampm (number 10)
got 12:00 AM but expected 12:00 PM
FAIL: gnu.testlet.java.util.Calendar.ampm (number 11)
got 12:10 AM but expected 12:10 PM
FAIL: gnu.testlet.java.util.Calendar.ampm (number 12)
got 12:10 AM but expected 12:10 PM
PASS: gnu.testlet.java.util.Calendar.ampm (number 13)
PASS: gnu.testlet.java.util.Calendar.ampm (number 14)
PASS: gnu.testlet.java.util.Calendar.ampm (number 15)
PASS: gnu.testlet.java.util.Calendar.ampm (number 16)
8 of 16 tests failed

Sun's java version "1.4.2_02"
gnu.testlet.java.util.Calendar.ampm
----
FAIL: gnu.testlet.java.util.Calendar.ampm (number 1)
got 12:00 PM but expected 12:00 AM
PASS: gnu.testlet.java.util.Calendar.ampm (number 2)
FAIL: gnu.testlet.java.util.Calendar.ampm (number 3)
got 12:10 PM but expected 12:10 AM
PASS: gnu.testlet.java.util.Calendar.ampm (number 4)
PASS: gnu.testlet.java.util.Calendar.ampm (number 5)
PASS: gnu.testlet.java.util.Calendar.ampm (number 6)
PASS: gnu.testlet.java.util.Calendar.ampm (number 7)
PASS: gnu.testlet.java.util.Calendar.ampm (number 8)
FAIL: gnu.testlet.java.util.Calendar.ampm (number 9)
got 12:00 AM but expected 12:00 PM
PASS: gnu.testlet.java.util.Calendar.ampm (number 10)
FAIL: gnu.testlet.java.util.Calendar.ampm (number 11)
got 12:10 AM but expected 12:10 PM
PASS: gnu.testlet.java.util.Calendar.ampm (number 12)
PASS: gnu.testlet.java.util.Calendar.ampm (number 13)
PASS: gnu.testlet.java.util.Calendar.ampm (number 14)
PASS: gnu.testlet.java.util.Calendar.ampm (number 15)
PASS: gnu.testlet.java.util.Calendar.ampm (number 16)
4 of 16 tests failed

The Mauve test program:
// Tags: JDK1.1

// Copyright (c) 2003 Ito Kazumitsu

// This file is part of Mauve.

package gnu.testlet.java.util.Calendar;

import gnu.testlet.Testlet;
import gnu.testlet.TestHarness;
import java.text.*;
import java.util.*;

public class ampm implements Testlet
{
  private DateFormat format;
  private TestHarness harness;

  public void test (TestHarness harness)
  {
    // AM/PM mark is locale-dependent.  We use Locale.US.
    format = new SimpleDateFormat("hh:mm a", Locale.US);
    this.harness = harness;

    // According to the API document of java.util.Calendar,
    // midnight belongs to "am", and noon belongs to "pm".

    checkTime(12, 0, Calendar.AM, "12:00 AM");
    checkTime("12:00 AM", "12:00 AM");
    checkTime(12, 10, Calendar.AM, "12:10 AM");
    checkTime("12:10 AM", "12:10 AM");
    checkTime(0, 0, Calendar.AM, "12:00 AM");
    checkTime("0:00 AM", "12:00 AM");
    checkTime(0, 10, Calendar.AM, "12:10 AM");
    checkTime("0:10 AM", "12:10 AM");

    checkTime(12, 0, Calendar.PM, "12:00 PM");
    checkTime("12:00 PM", "12:00 PM");
    checkTime(12, 10, Calendar.PM, "12:10 PM");
    checkTime("12:10 PM", "12:10 PM");
    checkTime(0, 0, Calendar.PM, "12:00 PM");
    checkTime("0:00 PM", "12:00 PM");
    checkTime(0, 10, Calendar.PM, "12:10 PM");
    checkTime("0:10 PM", "12:10 PM");
  }

  private void checkTime(int hh, int mm, int ampm, String expect)
  {

    Calendar calendar = Calendar.getInstance();
    calendar = Calendar.getInstance();
    calendar.set(Calendar.HOUR, hh);
    calendar.set(Calendar.MINUTE, mm);
    calendar.set(Calendar.AM_PM, ampm);
    harness.check (format.format (calendar.getTime()), expect);
  }

  private void checkTime(String input, String expect)
  {

    Calendar calendar = Calendar.getInstance();
    try
      {
        calendar.setTime (format.parse(input));
        harness.check (format.format(calendar.getTime()), expect);
      }
    catch (ParseException _)
      {
        harness.debug (_);
        harness.fail (input + " couldn't be parsed");
      }

  }

}




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