From: Paul Eggert <eggert@CS.UCLA.EDU>
Cc: bug-gnu-emacs@gnu.org
Subject: Re: Emacs current-time-string core dump on 64-bit hosts
Date: Fri, 31 Mar 2006 12:51:08 -0800 [thread overview]
Message-ID: <87acb6fidf.fsf@penguin.cs.ucla.edu> (raw)
In-Reply-To: <E1FPNQZ-0003bS-P8@fencepost.gnu.org> (Richard Stallman's message of "Fri, 31 Mar 2006 12:28:51 -0500")
Richard Stallman <rms@gnu.org> writes:
> So I would prefer if we just have conditionals set for certain systems
> by the s/ file.
OK.
I raised this issue on the Open Group mailing lists, and just now got
the bad news that the C standardization committee intends to change
the spec for ctime and asctime, by allowing implementations to crash
if the year is outside the range 1000-9999. So we'd need to change
Emacs anyway, to be portable to future C standards.
I'm a little rusty with s/ files, but I assume that we could use
something like this in a generic s/ file somewhere:
/* Safe values the tm_year members of arguments passed to asctime.
C89 and C99 say the range is -999-1900 through 9999-1900, but
<http://www.opengroup.org/austin/mailarchives/ag/msg09383.html>
says the C committee will change this to 1000-1900 through
9999-1900, so use the more-conservative range here. */
#ifndef TM_YEAR_IN_ASCTIME_RANGE
# define TM_YEAR_IN_ASCTIME_RANGE(tm_year) \
(1000 - 1900 <= (tm_year) && (tm_year) <= 9999 - 1900)
#endif
and then in s/gnu-linux.h and src/s/gnu.h we'd put this:
#define TM_YEAR_IN_ASCTIME_RANGE(tm_year) ((tm_year) <= INT_MAX - 1900)
and similarly for any other platform where we know the actual range.
Then b2m.c, fakemail.c, and editfns.c can use TM_YEAR_IN_ASCTIME_RANGE.
Is that the sort of thing you have in mind? If so, can you please
suggest where the generic definition of TM_YEAR_IN_ASCTIME_RANGE
should go?
next prev parent reply other threads:[~2006-03-31 20:51 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-17 5:58 Emacs current-time-string core dump on 64-bit hosts Paul Eggert
2006-03-17 12:16 ` Eli Zaretskii
2006-03-17 12:46 ` Andreas Schwab
2006-03-17 16:04 ` Kevin Rodgers
2006-03-18 0:44 ` Paul Eggert
2006-03-18 11:50 ` Eli Zaretskii
2006-03-19 2:30 ` Paul Eggert
2006-03-21 19:25 ` Richard Stallman
2006-03-18 8:43 ` Richard Stallman
2006-03-19 1:53 ` Paul Eggert
2006-03-19 21:50 ` Richard Stallman
2006-03-19 23:44 ` Paul Eggert
2006-03-20 19:59 ` Eli Zaretskii
2006-03-27 22:00 ` Paul Eggert
2006-03-28 10:16 ` Eli Zaretskii
2006-03-30 7:52 ` Paul Eggert
2006-03-30 20:36 ` Eli Zaretskii
2006-04-04 4:57 ` Paul Eggert
2006-04-04 18:20 ` Eli Zaretskii
2006-03-21 1:00 ` Richard Stallman
2006-03-24 20:45 ` Paul Eggert
2006-03-25 9:10 ` Eli Zaretskii
2006-03-26 5:25 ` Paul Eggert
2006-03-26 20:06 ` Eli Zaretskii
2006-03-27 22:29 ` Richard Stallman
2006-03-28 10:20 ` Eli Zaretskii
2006-03-29 8:14 ` Richard Stallman
2006-03-25 15:26 ` Richard Stallman
2006-03-24 21:00 ` Paul Eggert
2006-03-24 21:09 ` Paul Eggert
2006-03-25 15:26 ` Richard Stallman
2006-03-26 7:31 ` Paul Eggert
[not found] ` <E1FNnCd-0000pN-J4@fencepost.gnu.org>
2006-03-27 20:49 ` Paul Eggert
2006-03-28 19:33 ` Richard Stallman
2006-03-30 7:57 ` Paul Eggert
2006-03-31 17:28 ` Richard Stallman
2006-03-31 20:51 ` Paul Eggert [this message]
2006-04-01 20:28 ` Richard Stallman
2006-04-03 4:44 ` Paul Eggert
2006-03-17 16:25 ` Andreas Schwab
-- strict thread matches above, loose matches on Subject: below --
2006-03-17 8:02 Paul Eggert
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