62 lines
2.0 KiB
C
62 lines
2.0 KiB
C
/* gmp_errno, __gmp_exception -- exception handling and reporting.
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THE FUNCTIONS IN THIS FILE, APART FROM gmp_errno, ARE FOR INTERNAL USE
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ONLY. THEY'RE ALMOST CERTAIN TO BE SUBJECT TO INCOMPATIBLE CHANGES OR
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DISAPPEAR COMPLETELY IN FUTURE GNU MP RELEASES.
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Copyright 2000, 2001, 2003 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include <stdlib.h>
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#include "gmp.h"
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#include "gmp-impl.h"
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int gmp_errno = 0;
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/* The deliberate divide by zero triggers an exception on most systems. On
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those where it doesn't, for example power and powerpc, use abort instead.
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Enhancement: Perhaps raise(SIGFPE) (or the same with kill()) would be
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better than abort. Perhaps it'd be possible to get the BSD style
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FPE_INTDIV_TRAP parameter in there too. */
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void
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__gmp_exception (int error_bit)
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{
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gmp_errno |= error_bit;
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__gmp_junk = 10 / __gmp_0;
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abort ();
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}
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/* These functions minimize the amount of code required in functions raising
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exceptions. Since they're "noreturn" and don't take any parameters, a
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test and call might even come out as a simple conditional jump. */
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void
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__gmp_sqrt_of_negative (void)
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{
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__gmp_exception (GMP_ERROR_SQRT_OF_NEGATIVE);
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}
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void
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__gmp_divide_by_zero (void)
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{
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__gmp_exception (GMP_ERROR_DIVISION_BY_ZERO);
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}
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