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From "Tim Ellison (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HARMONY-329) [classlib][luni] Endless loop when using Double.parseDouble(String) with certain types of value
Date Tue, 14 Jul 2009 09:37:15 GMT

     [ https://issues.apache.org/jira/browse/HARMONY-329?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Tim Ellison resolved HARMONY-329.

       Resolution: Fixed
    Fix Version/s: 5.0M11

As the comment says, it may not complete because the successive approximation is not stable
at the finest resolution, but since there is a limited resolution of doubles anyway we can
trim it early to ensure better convergence.

Fix applied at repo revision r793829.

Please verify it fixes the problem ok for you.

> [classlib][luni] Endless loop when using Double.parseDouble(String) with certain types
of value
> -----------------------------------------------------------------------------------------------
>                 Key: HARMONY-329
>                 URL: https://issues.apache.org/jira/browse/HARMONY-329
>             Project: Harmony
>          Issue Type: Bug
>          Components: Classlib
>            Reporter: Sian January
>            Assignee: Tim Ellison
>             Fix For: 5.0M11
> Calling Double.parseDouble(..) with certain Strings (e.g. Double.parseDouble("-1.233999999999999965116738099630936817275852021384209929081813042837802886790127428328465579708849276001782791006814286802871737087810957327493372866733334925806221045495205250590286471187577636646208155890426896101636282423463443661040209738873506655844025580428394216030152374941053494694642722606658935546875E-112");)
causes an endless loop.  
> Although this is not necessarily a case you would see in regular programming it happens
when you do something like new BigDecimal(-1.234E-112).doubleValue(), which was the cause
of the endless loop mentioned in HARMONY-319.
> The loop occurs in the native method "doubleAlgorithm (JNIEnv * env, U_64 * f, IDATA
length, jint e, jdouble z)" in native-src/shared/math/dblparse.c.

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