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Re: Converting NaN to integer 0.
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From: |
Luc Teirlinck |
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Subject: |
Re: Converting NaN to integer 0. |
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Date: |
Tue, 12 Feb 2002 17:49:09 -0600 (CST) |
The value that the integer rounding functions return when passed NaN
seems indeed to be very much machine dependent. They returned 0 on
the machine I used previously (mentioned in the return of the
emacs-version function). This occurred both in Emacs20.7 and 21.1.90.
They return -1 in the setup below.
** Welcome to IELM *** Type (describe-mode) for help.
ELISP> (floor 0.0e+NaN)
-1
ELISP> (ceiling 0.0e+NaN)
-1
ELISP> (truncate 0.0e+NaN)
-1
ELISP> (round 0.0e+NaN)
-1
ELISP> (emacs-version)
"GNU Emacs 20.7.1 (sparc-sun-solaris2.8, X toolkit)\n of Thu Apr 12
2001 on eel\"