/usr/include/trionan.h is in libtrio-dev 1.16+dfsg1-3+b2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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*
* $Id$
*
* Copyright (C) 2001 Bjorn Reese <breese@users.sourceforge.net>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE AUTHORS AND
* CONTRIBUTORS ACCEPT NO RESPONSIBILITY IN ANY CONCEIVABLE MANNER.
*
************************************************************************/
#ifndef TRIO_TRIONAN_H
#define TRIO_TRIONAN_H
#include "triodef.h"
#ifdef __cplusplus
extern "C" {
#endif
#if !defined(TRIO_PUBLIC_NAN)
# if !defined(TRIO_PUBLIC)
# define TRIO_PUBLIC
# endif
# define TRIO_PUBLIC_NAN TRIO_PUBLIC
#endif
enum {
TRIO_FP_INFINITE,
TRIO_FP_NAN,
TRIO_FP_NORMAL,
TRIO_FP_SUBNORMAL,
TRIO_FP_ZERO
};
/*************************************************************************
* Dependencies
*/
#if defined(TRIO_EMBED_NAN)
/*
* The application that trionan is embedded in must define which functions
* it uses.
*
* The following resolves internal dependencies.
*/
# if defined(TRIO_FUNC_ISNAN) \
|| defined(TRIO_FUNC_ISINF)
# if !defined(TRIO_FUNC_FPCLASSIFY_AND_SIGNBIT)
# define TRIO_FUNC_FPCLASSIFY_AND_SIGNBIT
# endif
# endif
# if defined(TRIO_FUNC_NAN)
# if !defined(TRIO_FUNC_PINF)
# define TRIO_FUNC_PINF
# endif
# endif
# if defined(TRIO_FUNC_NINF)
# if !defined(TRIO_FUNC_PINF)
# define TRIO_FUNC_PINF
# endif
# endif
#else
/*
* When trionan is not embedded all all functions are defined.
*/
# define TRIO_FUNC_NAN
# define TRIO_FUNC_PINF
# define TRIO_FUNC_NINF
# define TRIO_FUNC_NZERO
# define TRIO_FUNC_ISNAN
# define TRIO_FUNC_ISINF
# define TRIO_FUNC_ISFINITE
# define TRIO_FUNC_SIGNBIT
# define TRIO_FUNC_FPCLASSIFY
# define TRIO_FUNC_FPCLASSIFY_AND_SIGNBIT
#endif
/*************************************************************************
* Functions
*/
/*
* Return NaN (Not-a-Number).
*/
#if defined(TRIO_FUNC_NAN)
TRIO_PUBLIC_NAN double
trio_nan
TRIO_PROTO((void));
#endif
/*
* Return positive infinity.
*/
#if defined(TRIO_FUNC_PINF)
TRIO_PUBLIC_NAN double
trio_pinf
TRIO_PROTO((void));
#endif
/*
* Return negative infinity.
*/
#if defined(TRIO_FUNC_NINF)
TRIO_PUBLIC_NAN double
trio_ninf
TRIO_PROTO((void));
#endif
/*
* Return negative zero.
*/
#if defined(TRIO_FUNC_NZERO)
TRIO_PUBLIC_NAN double
trio_nzero
TRIO_PROTO((TRIO_NOARGS));
#endif
/*
* If number is a NaN return non-zero, otherwise return zero.
*/
#if defined(TRIO_FUNC_ISNAN)
TRIO_PUBLIC_NAN int
trio_isnan
TRIO_PROTO((double number));
#endif
/*
* If number is positive infinity return 1, if number is negative
* infinity return -1, otherwise return 0.
*/
#if defined(TRIO_FUNC_ISINF)
TRIO_PUBLIC_NAN int
trio_isinf
TRIO_PROTO((double number));
#endif
/*
* If number is finite return non-zero, otherwise return zero.
*/
#if defined(TRIO_FUNC_ISFINITE)
TRIO_PUBLIC_NAN int
trio_isfinite
TRIO_PROTO((double number));
#endif
#if defined(TRIO_FUNC_SIGNBIT)
TRIO_PUBLIC_NAN int
trio_signbit
TRIO_PROTO((double number));
#endif
#if defined(TRIO_FUNC_FPCLASSIFY)
TRIO_PUBLIC_NAN int
trio_fpclassify
TRIO_PROTO((double number));
#endif
#if defined(TRIO_FUNC_FPCLASSIFY_AND_SIGNBIT)
TRIO_PUBLIC_NAN int
trio_fpclassify_and_signbit
TRIO_PROTO((double number, int *is_negative));
#endif
#ifdef __cplusplus
}
#endif
#endif /* TRIO_TRIONAN_H */
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