From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 17249 invoked by alias); 31 Jul 2008 12:40:54 -0000 Received: (qmail 14362 invoked by uid 48); 31 Jul 2008 12:39:42 -0000 Date: Thu, 31 Jul 2008 12:40:00 -0000 From: "mtk dot manpages at gmail dot com" To: glibc-bugs@sources.redhat.com Message-ID: <20080731123942.6808.mtk.manpages@gmail.com> Reply-To: sourceware-bugzilla@sourceware.org Subject: [Bug math/6808] New: yn() does not set errno for overflow error. X-Bugzilla-Reason: CC Mailing-List: contact glibc-bugs-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Post: List-Help: , Sender: glibc-bugs-owner@sourceware.org X-SW-Source: 2008-07/txt/msg00210.txt.bz2 For an overflow error, yn() correctly raise an exception, but does not set errno. errno should be set to ERANGE. Note: I haven't raised this bug against y0)_ and y1(), since, as far as I can tell, one can't get overflow errors for these functions (on x86-32 at least). For example, if the argument is DBL_MIN: y0(2.22507385850720138e-308)=-4.51052971007128576e+02 y1(2.22507385850720138e-308)=-2.86111748575702833e+307 In passing, it is worth noting that yn() does correctly set errno and raise the right exception at least one other error (domain error), and also sets errno correctly for an underflow error. 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: yn() does not set errno for overflow 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=6808 ------- You are receiving this mail because: ------- You are on the CC list for the bug, or are watching someone who is.