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* [Bug math/6810] New: tgamma() does not set errno for underflow error
@ 2008-07-31 13:53 mtk dot manpages at gmail dot com
  2008-07-31 13:55 ` [Bug math/6810] " mtk dot manpages at gmail dot com
  0 siblings, 1 reply; 5+ messages in thread
From: mtk dot manpages at gmail dot com @ 2008-07-31 13:53 UTC (permalink / raw)
  To: glibc-bugs

tgamma() correctly sets errno and raises an exception for an overflow error. 
However, for an underflow error, it only raises an exception -- errno is not
set; errno should be set to ERANGE for this case.

Background: 
On error, many glibc math functions both set errno and raise an exception
(fetestexcept(3)).  For example, the following  function all do this: acos(),
asin(), cosh(), sinh(), acosh(), asinh(), exp(), exp2(), ldexp(), log(),
log10(), log2().  However, there is much inconsistency.  Some functions raise an
exception, but don't set errno.  Some functions set errno for some errors, but
not others.  A few set errno, but don't raise an exception.  This series of bug
reports documents deviations from what I consider the ideal: all functions
should BOTH set errno AND raise an exception for all errors.

All of these reports relate to tests on glibc 2.8 (as provided by SUSE 11.0).

-- 
           Summary: tgamma() does not set errno for underflow error
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: math
        AssignedTo: aj at suse dot de
        ReportedBy: mtk dot manpages at gmail dot com
                CC: glibc-bugs at sources dot redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=6810

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-- links below jump to the message on this page --
     [not found] <bug-6810-131@http.sourceware.org/bugzilla/>
2012-03-01 23:30 ` [Bug math/6810] tgamma() does not set errno for underflow error jsm28 at gcc dot gnu.org
2013-12-05 14:02 ` jsm28 at gcc dot gnu.org
2013-12-05 14:02 ` cvs-commit at gcc dot gnu.org
2014-06-13 11:16 ` fweimer at redhat dot com
2008-07-31 13:53 [Bug math/6810] New: " mtk dot manpages at gmail dot com
2008-07-31 13:55 ` [Bug math/6810] " mtk dot manpages at gmail dot com

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