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/* 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 <signal.h>
#include "gmp-impl.h"
int gmp_errno = 0;
/* Use SIGFPE on systems which have it. Otherwise, deliberate divide
by zero, which triggers an exception on most systems. On those
where it doesn't, for example power and powerpc, use abort instead. */
void
__gmp_exception (int error_bit)
{
gmp_errno |= error_bit;
#ifdef SIGFPE
raise (SIGFPE);
#else
__gmp_junk = 10 / __gmp_0;
#endif
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);
}
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