forked from KolibriOS/kolibrios
49 lines
671 B
C
49 lines
671 B
C
|
/*
|
||
|
|
* nan () returns a nan.
|
||
|
|
* Added by Cygnus Support.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
FUNCTION
|
||
|
|
<<nan>>, <<nanf>>---representation of ``Not a Number''
|
||
|
|
|
||
|
|
INDEX
|
||
|
|
nan
|
||
|
|
INDEX
|
||
|
|
nanf
|
||
|
|
|
||
|
|
ANSI_SYNOPSIS
|
||
|
|
#include <math.h>
|
||
|
|
double nan(const char *);
|
||
|
|
float nanf(const char *);
|
||
|
|
|
||
|
|
TRAD_SYNOPSIS
|
||
|
|
#include <math.h>
|
||
|
|
double nan();
|
||
|
|
float nanf();
|
||
|
|
|
||
|
|
|
||
|
|
DESCRIPTION
|
||
|
|
<<nan>> and <<nanf>> return an IEEE NaN (Not a Number) in
|
||
|
|
double- and single-precision arithmetic respectively. The
|
||
|
|
argument is currently disregarded.
|
||
|
|
|
||
|
|
QUICKREF
|
||
|
|
nan - pure
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "fdlibm.h"
|
||
|
|
|
||
|
|
#ifndef _DOUBLE_IS_32BITS
|
||
|
|
|
||
|
|
double nan(const char *unused)
|
||
|
|
{
|
||
|
|
double x;
|
||
|
|
|
||
|
|
INSERT_WORDS(x,0x7ff80000,0);
|
||
|
|
return x;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* _DOUBLE_IS_32BITS */
|