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Message-ID: | <449ADB9B.6010105@redhat.com> |
Date: | Thu, 22 Jun 2006 14:04:11 -0400 |
From: | Jeff Johnston <jjohnstn AT redhat DOT com> |
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To: | Jeff Johnston <jjohnstn AT redhat DOT com> |
Cc: | newlib AT sourceware DOT org, cygwin AT cygwin DOT com |
Subject: | Re: strtod (and atof) on hex numbers |
References: | <af54caaf0606201000o4df93c69scbc55bf24f12915d AT mail DOT gmail DOT com> <20060620171835 DOT GH29251 AT calimero DOT vinschen DOT de> <44983B60 DOT 7010903 AT redhat DOT com> |
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I have integrated a newer version of strtod from David M. Gay's gdtoa FreeBSD code. This code has the C99 support in question including nan and inf support. I have tested on x86-linux and mn10300. As usual, please run it through its paces on Cygwin and let me know if there are any problems. -- Jeff J. Jeff Johnston wrote: > This is a C99 extension to strtod over original ANSI C90 which is what > newlib started with. I'll start working on it, but don't expect > anything too quick. > > -- Jeff J. > > Corinna Vinschen wrote: > >> This is a newlib issue. I redirected this to the appropriate mailing >> list newlib AT sourceware DOT org. >> >> >> On Jun 20 13:00, Paul Biggar wrote: >> >>> Hi, >>> >>> atof (and hence strtod) on hexadecimal numbers results in 0.0 (errno >>> of 0). This may be related to an old issue where NaN isnt correctly >>> parsed. I believe it isnt correct behaviour: >>> >>> http://www.opengroup.org/onlinepubs/000095399/functions/atof.html >>> >>> >>> >>> I've tested it for integers in the range 0x8000000 to 0xFFFFFFFF. It >>> works properly on >>> >>> ubuntu dapper, gcc 4.1 on i386; >>> debian stable, gcc 3.3 on amd64 >>> sunos ?, gcc 3.4 on sparc >>> >>> I'm using standard cygwin distribution, which uses gcc 3.4.4 (cygming >>> special) >>> >>> Sample code: >>> >>> #include "limits.h" >>> #include <iostream.h> >>> #include "errno.h" >>> >>> int main() >>> >>> { >>> cout << ULONG_MAX << endl; >>> cout << 0xFFFFFFFF << endl; >>> >>> errno = 0; >>> cout << atof("0xFFFFFFFF") << endl; >>> cout << errno << endl; >>> >>> errno = 0; >>> cout << strtod("0xFFFFFFFF", NULL) << endl; >>> cout << errno << endl; >>> >>> } >>> >>> >>> Is this being fixed? I could find a mention of it before. Does anyone >>> know a simple workaround? >>> >>> Thanks >>> Paul >> >> >> >> Corinna >> > -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
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