centos man page for isnormal

ISNORMAL(3P)						     POSIX Programmer's Manual						      ISNORMAL(3P)

PROLOG
       This  manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (consult the correspond-
       ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

NAME
       isnormal - test for a normal value

SYNOPSIS
       #include <math.h>

       int isnormal(real-floating x);

DESCRIPTION
       The isnormal() macro shall determine whether its argument value is normal (neither zero, subnormal, infinite, nor NaN).	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 VALUE
       The isnormal() macro shall return a non-zero value if and only if its argument has a normal value.

ERRORS
       No errors are defined.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       fpclassify(), isfinite(), isinf(), isnan(), signbit(), the Base Definitions volume of IEEE Std 1003.1-2001, <math.h>

COPYRIGHT
       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
       ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
       Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and  the  original  IEEE
       and  The  Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained
       online at http://www.opengroup.org/unix/online.html .

IEEE
/The Open Group						       2003							      ISNORMAL(3P)