mirror of
https://github.com/Unidata/netcdf-c.git
synced 2024-11-21 03:13:42 +08:00
27 lines
819 B
C
27 lines
819 B
C
/*********************************************************************
|
|
* Copyright 2018, University Corporation for Atmospheric Research
|
|
* See netcdf/README file for copying and redistribution conditions.
|
|
* Russ Rew
|
|
*********************************************************************/
|
|
#ifndef _ISNAN_H
|
|
#define _ISNAN_H
|
|
|
|
#include "config.h"
|
|
|
|
#ifndef NO_FLOAT_H
|
|
#include <float.h> /* for DBL_MAX */
|
|
#endif /* NO_FLOAT_H */
|
|
#include <math.h>
|
|
|
|
#if ! (defined(isinf) || HAVE_DECL_ISINF)
|
|
#define isinf(x) (DBL_MAX/((double)(x))==0.0)
|
|
#endif /* !HAVE_DECL_ISINF */
|
|
#if ! (defined(isnan) || HAVE_DECL_ISNAN)
|
|
#define isnan(x) ((x)!=(x))
|
|
#endif /* !HAVE_DECL_ISNAN */
|
|
#if ! (defined(isfinite) || HAVE_DECL_ISFINITE)
|
|
#define isfinite(x) (!(isinf(x)||isnan(x)))
|
|
#endif /* !HAVE_DECL_ISFINITE */
|
|
|
|
#endif /* _ISNAN_H */
|