Name
infnan — deal with infinite or not-a-number (NaN) result
Synopsis
#include <math.h>
double infnan( |
int | error); |
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Note |
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DESCRIPTION
The infnan() function
returns a suitable value for infinity and "not-a-number"
(NaN) results. The value of error can be ERANGE to represent infinity or anything
else to represent NaN. errno is
also set.
RETURN VALUE
If error is
ERANGE (Infinity),
HUGE_VAL is returned.
If error is
−ERANGE
(−Infinity), −HUGE_VAL is returned.
If error is
anything else, NAN is returned.
ERRORS
- EDOM
-
The value of
erroris "not-a-number" (NaN). - ERANGE
-
The value of
erroris positive or negative infinity.
COLOPHON
This page is part of release 2.79 of the Linux man-pages project. A
description of the project, and information about reporting
bugs, can be found at
http://www.kernel.org/doc/man-pages/.
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Copyright 1993 David Metcalfe (davidprism.demon.co.uk) Permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and this permission notice are preserved on all copies. Permission is granted to copy and distribute modified versions of this manual under the conditions for verbatim copying, provided that the entire resulting derived work is distributed under the terms of a permission notice identical to this one. Since the Linux kernel and libraries are constantly changing, this manual page may be incorrect or out-of-date. The author(s) assume no responsibility for errors or omissions, or for damages resulting from the use of the information contained herein. The author(s) may not have taken the same level of care in the production of this manual, which is licensed free of charge, as they might when working professionally. Formatted or processed versions of this manual, if unaccompanied by the source, must acknowledge the copyright and authors of this work. References consulted: Linux libc source code Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991) 386BSD man pages Modified Sat Jul 24 19:11:11 1993 by Rik Faith (faithcs.unc.edu) Modified 2004-11-12 as per suggestion by Fabian Kreutz/AEB to note that this function is not available in glibc2. |