/* gmp_errno, __gmp_exception -- exception handling and reporting.

   THE FUNCTIONS IN THIS FILE, APART FROM gmp_errno, ARE FOR INTERNAL USE

   ONLY.  THEY'RE ALMOST CERTAIN TO BE SUBJECT TO INCOMPATIBLE CHANGES OR

   DISAPPEAR COMPLETELY IN FUTURE GNU MP RELEASES.

Copyright 2000, 2001, 2003 Free Software Foundation, Inc.

This file is part of the GNU MP Library.

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

it under the terms of either:

  * the GNU Lesser General Public License as published by the Free

    Software Foundation; either version 3 of the License, or (at your

    option) any later version.

or

  * the GNU General Public License as published by the Free Software

    Foundation; either version 2 of the License, or (at your option) any

    later version.

or both in parallel, as here.

The GNU MP 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 General Public License

for more details.

You should have received copies of the GNU General Public License and the

GNU Lesser General Public License along with the GNU MP Library.  If not,

see https://www.gnu.org/licenses/.  */

#include <stdlib.h>

#include "gmp.h"

#include "gmp-impl.h"

int gmp_errno = 0;

/* The deliberate divide by zero triggers an exception on most systems.  On

   those where it doesn't, for example power and powerpc, use abort instead.

   Enhancement: Perhaps raise(SIGFPE) (or the same with kill()) would be

   better than abort.  Perhaps it'd be possible to get the BSD style

   FPE_INTDIV_TRAP parameter in there too.  */

void

__gmp_exception (int error_bit)

{

  gmp_errno |= error_bit;

  __gmp_junk = 10 / __gmp_0;

  abort ();

}

/* These functions minimize the amount of code required in functions raising

   exceptions.  Since they're "noreturn" and don't take any parameters, a

   test and call might even come out as a simple conditional jump.  */

void

__gmp_sqrt_of_negative (void)

{

  __gmp_exception (GMP_ERROR_SQRT_OF_NEGATIVE);

}

void

__gmp_divide_by_zero (void)

{

  __gmp_exception (GMP_ERROR_DIVISION_BY_ZERO);

}