From: "Eli Zaretskii" <eliz@elta.co.il>
Cc: teirllm@dms.auburn.edu, emacs-devel@gnu.org
Subject: Re: sqrt with negative arg.
Date: Fri, 02 Jan 2004 11:27:34 +0200 [thread overview]
Message-ID: <8011-Fri02Jan2004112733+0200-eliz@elta.co.il> (raw)
In-Reply-To: <m3n09737ox.fsf@whitebox.m5r.de> (message from Andreas Schwab on Thu, 01 Jan 2004 18:22:22 +0100)
> From: Andreas Schwab <schwab@suse.de>
> Date: Thu, 01 Jan 2004 18:22:22 +0100
>
> This is a bug either in sqrt or in matherr on your system. ISO C
> requires that a domain error occurs when sqrt is called with a
> negative argument, and Emacs depends on matherr (when it is supported)
> to be called. Apparently, the availability of matherr is not enough
> to guarantee this.
Actually, Emacs will do fine even if the math function only sets errno
when such problems happen. If matherr is available, it will be used,
but it isn't necessary. The macros on floatfns.c tell the details.
prev parent reply other threads:[~2004-01-02 9:27 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-12-31 21:36 sqrt with negative arg Luc Teirlinck
2004-01-01 6:24 ` Eli Zaretskii
2004-01-01 16:30 ` Richard Stallman
2004-01-01 16:42 ` Luc Teirlinck
2004-01-01 17:22 ` Andreas Schwab
2004-01-02 9:27 ` Eli Zaretskii [this message]
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