Date: Wed, 24 Dec 2014 14:16:37 -0500 From: Pedro Giffuni <pfg@FreeBSD.org> To: freebsd-standards@FreeBSD.org Subject: Does posix say anything about the sign in NaNs ? Message-ID: <549B1115.8000909@FreeBSD.org>
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Hello;
I got the attached patch from OpenBSD.
It says:
____
Show the sign for NaN as per POSIX; from Elliott Hughes.
ok martynas@, millert@, doug@
____
I can't find a reference in POSIX documentation to support it though.
Anyone has a reason why we shouldn't adopt it, or a reference I can quote
on the commit log?
Regards,
Pedro.
ps. Merry Christmas to everyone !!
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Content-Type: text/x-patch;
name="stdio-vfprintf-nan.diff"
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filename="stdio-vfprintf-nan.diff"
Index: lib/libc/stdio/vfprintf.c
===================================================================
--- lib/libc/stdio/vfprintf.c (revision 276188)
+++ lib/libc/stdio/vfprintf.c (working copy)
@@ -721,10 +721,9 @@
if (signflag)
sign = '-';
if (expt == INT_MAX) { /* inf or nan */
- if (*cp == 'N') {
+ if (*cp == 'N')
cp = (ch >= 'a') ? "nan" : "NAN";
- sign = '\0';
- } else
+ else
cp = (ch >= 'a') ? "inf" : "INF";
size = 3;
flags &= ~ZEROPAD;
Index: lib/libc/stdio/vfwprintf.c
===================================================================
--- lib/libc/stdio/vfwprintf.c (revision 276188)
+++ lib/libc/stdio/vfwprintf.c (working copy)
@@ -788,10 +788,9 @@
if (signflag)
sign = '-';
if (expt == INT_MAX) { /* inf or nan */
- if (*cp == 'N') {
+ if (*cp == 'N')
cp = (ch >= 'a') ? L"nan" : L"NAN";
- sign = '\0';
- } else
+ else
cp = (ch >= 'a') ? L"inf" : L"INF";
size = 3;
flags &= ~ZEROPAD;
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