Re: strtod bugs

[Eric Blake]

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According to Bruno Haible on 3/30/2008 6:11 PM:
| Find attached the results on a dozen of platforms.

Thanks.

|
| I integrated these test results into test-strtod.c as comments (since we
don't
| yet have a matrix like in m4/printf.m4), using a script like this:

Even more thanks!  I'm adding the following, which does some more
interpretation of your results.

|   - You seem to have seen problems on Solaris 8 that I did not see. What can
|     be the reason? Did you use gnulib's signbit and isnan functions? I used
|     the ones from the system, or trivial platform-specific replacements.

I'll experiment with that more today (I couldn't access that machine over
the weekend), and update comments as needed.

- --
Don't work too hard, make some time for fun as well!

Eric Blake             address@hidden
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>From 9553f74080a7fdad09e6f36e1cf55092b51bb31f Mon Sep 17 00:00:00 2001
From: Eric Blake <address@hidden>
Date: Mon, 31 Mar 2008 06:22:49 -0600
Subject: [PATCH] More strtod documentation.

* doc/posix-functions/strtod.texi (strtod): Interpret more test
failures as distinct bugs.

Signed-off-by: Eric Blake <address@hidden>
---
 ChangeLog                       |    6 ++++++
 doc/posix-functions/strtod.texi |   27 +++++++++++++++++++++------
 2 files changed, 27 insertions(+), 6 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 49ada57..6c36fed 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2008-03-31  Eric Blake  <address@hidden>
+
+       More strtod documentation.
+       * doc/posix-functions/strtod.texi (strtod): Interpret more test
+       failures as distinct bugs.
+
 2008-03-30  Paul Eggert  <address@hidden>
 
        * lib/wchar.in.h [defined __need_mbstate_t]: Just include <wchar.h>.
diff --git a/doc/posix-functions/strtod.texi b/doc/posix-functions/strtod.texi
index f1fdb43..0a890a7 100644
--- a/doc/posix-functions/strtod.texi
+++ b/doc/posix-functions/strtod.texi
@@ -19,26 +19,41 @@ Old versions of Linux.
 This function returns a wrong end pointer on some old platforms.
 
 @item
-This function fails to do a valid parse of @samp{-0x} on some
+This function consumes whitespace even when there is nothing that should
+be parsed on some platforms:
+IRIX 6.5, OSF/1 5.1.
+
address@hidden
+This function allows whitespace between @samp{e} and the exponent on
+some platforms:
+HP-UX 11.11, IRIX 6.5, OSF/1 4.0.
+
address@hidden
+This function returns the wrong end pointer for @samp{-0x} on some
 platforms:
 glibc 2.4, MacOS X 10.3, FreeBSD 6.2, Cygwin < 1.5.25-11.
 
 @item
+This function returns +0.0 (not -0.0) for @samp{-0} on some platforms:
+IRIX 6.5.
+
address@hidden
 This function fails to parse Infinities and plain NaNs on some platforms:
 OpenBSD 4.0, HP-UX 11.11, IRIX 6.5, OSF/1 5.1, Solaris 9, mingw.
 
 @item
-This function fails to parse NaN() on some platforms:
+This function fails to parse @samp{NaN()} on some platforms:
 glibc-2.3.6, MacOS X 10.3, FreeBSD 6.2, OpenBSD 4.0, AIX 5.1, HP-UX 11.11, 
IRIX 6.5, OSF/1 5.1, Solaris?, Cygwin < 1.5.25-11, mingw.
 
 @item
-This function fails to parse NaN(n-char-sequence) on some platforms:
+This function fails to parse @samp{NaN(@var{n-char-sequence})} on some
+platforms:
 OpenBSD 4.0, HP-UX 11.11, IRIX 6.5, OSF/1 5.1, Solaris?, mingw.
 
 @item
-This function returns the wrong end pointer when parsing
-NaN(n-char-sequence) on some platforms:
-glibc-2.4, OpenBSD 4.0, AIX 5.1, HP-UX 11.11, IRIX 6.5, OSF/1 5.1, Solaris?, 
mingw.
+This function parses @samp{NaN(@var{n-char-sequence})}, but returns
+the wrong end pointer on some platforms:
+glibc-2.4, AIX 5.1.
 
 @item
 This function fails to parse C99 hexadecimal floating point on some
-- 
1.5.4