isinf(3M) Mathematical Library Functions isinf(3M)NAMEisinf - 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(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Standard │
├─────────────────────────────┼─────────────────────────────┤
│MT-Level │MT-Safe │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOfpclassify(3M), isfinite(3M), isnan(3M), isnormal(3M), math.h(3HEAD),
signbit(3M), attributes(5), standards(5)SunOS 5.10 12 Jul 2006 isinf(3M)