errno.c
上传用户:qaz666999
上传日期:2022-08-06
资源大小:2570k
文件大小:2k
- /* 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 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.
- 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 Lesser General Public
- License for more details.
- You should have received a copy of the GNU Lesser General Public License
- along with the GNU MP Library. If not, see http://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);
- }