ISNORMAL(3) BSD Library Functions Manual ISNORMAL(3)NAME
isnormal -- test for normal value
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <math.h>
int
isnormal(real-floating x);
DESCRIPTION
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.
IEEE 754
It is determined whether the value of x is normal, and neither zero, subnormal, infinite nor NaN.
VAX
It is determined whether the value of x is finite, and neither true zero, dirty zero nor ROP.
RETURN VALUES
The isnormal() macro returns a non-zero value if the value of x is finite. Otherwise 0 is returned.
ERRORS
No errors are defined.
SEE ALSO fpclassify(3), isfinite(3), math(3), signbit(3)STANDARDS
The isnormal() macro conforms to ISO/IEC 9899:1999 (``ISO C99'').
BSD October 29, 2003 BSD
Check Out this Related Man Page
isnormal(3M) Mathematical Library Functions isnormal(3M)NAME
isnormal - test for a normal value
SYNOPSIS
#include <math.h>
int isnormal(real-floating x);
DESCRIPTION
The isnormal() macro determines whether its argument value is normal (neither zero, subnormal, infinite, nor NaN). First, an argument rep-
resented in a format wider than its semantic type is converted to its semantic type. Then determination is based on the type of the argu-
ment.
RETURN VALUES
The isnormal() macro returns a non-zero value if and only if its argument has a normal 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 ALSO fpclassify(3M), isfinite(3M), isinf(3M), isnan(3M), math.h(3HEAD), signbit(3M), attributes(5), standards(5)SunOS 5.10 1 Nov 2003 isnormal(3M)
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