ISNORMAL(3) BSD Programmer's Manual ISNORMAL(3)
isnormal - test for normal value
libc
#include <math.h>
int
isnormal(real-floating x);
The isnormal() macro determines whether its argument x has a normal
value. An argument represented in a format wider than its semantic type
is converted to its semantic type first. The determination is then based
on the type of the argument.
It is determined whether the value of x is normal, and neither zero, sub-
normal, infinite nor NaN.
It is determined whether the value of x is finite, and neither true zero,
dirty zero nor ROP.
The isnormal() macro returns a non-zero value if the value of x is fin-
ite. Otherwise 0 is returned.
No errors are defined.
fpclassify(3), isfinite(3), math(3), signbit(3)
The isnormal() macro conforms to ISO/IEC 9899:1999 ("ISO C99").
MirOS BSD #10-current October 29, 2003 1
Generated on 2012-02-20 02:47:02 by $MirOS: src/scripts/roff2htm,v 1.70 2011/12/03 18:21:12 tg Exp $
These manual pages and other documentation are copyrighted by their respective writers;
their source is available at our CVSweb,
AnonCVS, and other mirrors. The rest is Copyright © 2002‒2011 The MirOS Project, Germany.
This product includes material
provided by Thorsten Glaser.
This manual page’s HTML representation is supposed to be valid XHTML/1.1; if not, please send a bug report – diffs preferred.