/* Declarations for SVID math error handling compatibility.

   Copyright (C) 1991-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#ifndef	_MATH_SVID_COMPAT_H

#define	_MATH_SVID_COMPAT_H	1

/* Support for various different standard error handling behaviors.  */

typedef enum

{

  _IEEE_ = -1,	/* According to IEEE 754/IEEE 854.  */

  _SVID_,	/* According to System V, release 4.  */

  _XOPEN_,	/* Nowadays also Unix98.  */

  _POSIX_,

  _ISOC_	/* Actually this is ISO C99.  */

} _LIB_VERSION_TYPE;

/* This variable can be changed at run-time to any of the values above to

   affect floating point error handling behavior (it may also be necessary

   to change the hardware FPU exception settings).  */

extern _LIB_VERSION_TYPE _LIB_VERSION;

/* In SVID error handling, `matherr' is called with this description

   of the exceptional condition.  */

struct exception

  {

    int type;

    char *name;

    double arg1;

    double arg2;

    double retval;

  };

extern int matherr (struct exception *__exc);

extern int __matherr (struct exception *__exc);

#define X_TLOSS	1.41484755040568800000e+16

/* Types of exceptions in the `type' field.  */

#define DOMAIN		1

#define SING		2

#define OVERFLOW	3

#define UNDERFLOW	4

#define TLOSS		5

#define PLOSS		6

/* SVID mode specifies returning this large value instead of infinity.  */

#define HUGE		3.40282347e+38F

/* The above definitions may be used in testcases.  The following code

   is only used in the implementation.  */

#ifdef _LIBC

/* fdlibm kernel function */

extern double __kernel_standard (double, double, int);

extern float __kernel_standard_f (float, float, int);

extern long double __kernel_standard_l (long double, long double, int);

# include <shlib-compat.h>

# define LIBM_SVID_COMPAT SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_27)

# if LIBM_SVID_COMPAT

compat_symbol_reference (libm, matherr, matherr, GLIBC_2_0);

compat_symbol_reference (libm, _LIB_VERSION, _LIB_VERSION, GLIBC_2_0);

# else

/* Except when building compat code, optimize out references to

   _LIB_VERSION and matherr.  */

#  define _LIB_VERSION _POSIX_

#  define matherr(EXC) ((void) (EXC), 0)

# endif

#endif

#endif /* math-svid-compat.h.  */