gmt_nan.h

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 *	See LICENSE.TXT file for copying and redistribution conditions.
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/*
 * Machine-dependent macros for generation and testing of NaNs.
 *
 * These routines use the IEEE definition of Silent NaNs to set NaNs and
 * use the available isnan* routines to test NaNs whenever available.
 *
 * Notes:
 *    If your system has no IEEE support, add -DNO_IEEE to CFLAGS
 *    We will then use the max double/float values to signify NaNs.
 *
 * Author:	Remko Scharroo
 * Date:	1-JAN-2010
 * Ver:		6 API
 */

/*!
 * \file gmt_nan.h
 * \brief Machine-dependent macros for generation and testing of NaNs
 */

#ifndef GMT_NAN_H
#define GMT_NAN_H

#include "gmt_notposix.h"

#ifdef NO_IEEE
#	define gmt_M_make_fnan(x) (x = FLT_MAX)
#	define gmt_M_make_dnan(x) (x = DBL_MAX)
#	define gmt_M_is_fnan(x) ((x) == FLT_MAX)
#	define gmt_M_is_dnan(x) ((x) == DBL_MAX)
#	define gmt_M_is_finf(x) ((x) == FLT_MAX)
#	define gmt_M_is_dinf(x) ((x) == DBL_MAX)
#else
#	define gmt_M_make_fnan(x) (x = (float) NAN)
#	define gmt_M_make_dnan(x) (x = NAN)
#	define gmt_M_is_fnan isnan
#	define gmt_M_is_dnan isnan
#	define gmt_M_is_finf isinf
#	define gmt_M_is_dinf isinf
#endif

#endif /* GMT_NAN_H */