ISINF(3M) Mathematical Library Functions ISINF(3M)
NAME
isinf - test for infinity
SYNOPSIS
c99 [
flag... ]
file...
-lm [
library... ]
#include <math.h>
int isinf(
real-floating x);
DESCRIPTION
The
isinf() macro determines whether its argument value is an
infinity (positive or negative). First, an argument represented in a
format wider than its semantic type is converted to its semantic
type. Then determination is based on the type of the argument.
RETURN VALUES
The
isinf() macro returns a non-zero value if and only if its
argument has an infinite value.
ERRORS
No errors are defined.
ATTRIBUTES
See
attributes(7) for descriptions of the following attributes:
+----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+----------------------------+-----------------------------+
|Interface Stability | Standard |
+----------------------------+-----------------------------+
|MT-Level | MT-Safe |
+----------------------------+-----------------------------+
SEE ALSO
math.h(3HEAD),
fpclassify(3M),
isfinite(3M),
isnan(3M),
isnormal(3M),
signbit(3M),
attributes(7),
standards(7)SunOS 5.11 November 17, 2008 ISINF(3M)
