ISINF(3M) Mathematical Library Functions ISINF(3M)
isinf - test for infinity
c99 [ flag... ] file... -lm [ library... ]
#include <math.h>
int isinf(real-floating x);
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.
The isinf() macro returns a non-zero value if and only if its
argument has an infinite value.
No errors are defined.
See attributes(7) for descriptions of the following attributes:
+----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+----------------------------+-----------------------------+
|Interface Stability | Standard |
+----------------------------+-----------------------------+
|MT-Level | MT-Safe |
+----------------------------+-----------------------------+
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)
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)