ISFINITE(3) BSD Programmer's Manual ISFINITE(3)
isfinite - test for finite value
libc
#include <math.h>
int
isfinite(real-floating x);
The isfinite() determines whether its argument x has a finite value. An
argument represented in a format wider than its semantic type is convert-
ed 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 zero, subnormal, or normal,
and neither infinite nor NaN.
It is determined whether the value of x is true zero or finite, and nei-
ther dirty zero nor ROP.
The isfinite() macro returns a non-zero value if the value of x is fin-
ite. Otherwise 0 is returned.
No errors are defined.
fpclassify(3), isnormal(3), math(3), signbit(3)
The isfinite() 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.