1 | /* gmp_errno, __gmp_exception -- exception handling and reporting. |
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2 | |
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3 | Copyright 2000, 2001 Free Software Foundation, Inc. |
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4 | |
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5 | This file is part of the GNU MP Library. |
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6 | |
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7 | The GNU MP Library is free software; you can redistribute it and/or modify |
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8 | it under the terms of the GNU Lesser General Public License as published by |
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9 | the Free Software Foundation; either version 2.1 of the License, or (at your |
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10 | option) any later version. |
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11 | |
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12 | The GNU MP Library is distributed in the hope that it will be useful, but |
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13 | WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
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14 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
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15 | License for more details. |
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16 | |
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17 | You should have received a copy of the GNU Lesser General Public License |
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18 | along with the GNU MP Library; see the file COPYING.LIB. If not, write to |
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19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
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20 | MA 02111-1307, USA. */ |
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21 | |
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22 | #include <stdlib.h> |
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23 | #include "gmp.h" |
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24 | #include "gmp-impl.h" |
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25 | |
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26 | int gmp_errno = 0; |
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27 | |
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28 | |
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29 | /* The deliberate divide by zero triggers an exception on most systems. On |
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30 | those where it doesn't, for example power and powerpc, use abort instead. |
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31 | |
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32 | Enhancement: Perhaps raise(SIGFPE) (or the same with kill()) would be |
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33 | better than abort. Perhaps it'd be possible to get the BSD style |
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34 | FPE_INTDIV_TRAP parameter in there too. */ |
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35 | |
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36 | void |
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37 | __gmp_exception (int error_bit) |
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38 | { |
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39 | gmp_errno |= error_bit; |
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40 | __gmp_junk = 10 / __gmp_0; |
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41 | abort (); |
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42 | } |
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43 | |
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44 | |
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45 | /* These functions minimize the amount of code required in functions raising |
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46 | exceptions. Since they're "noreturn" and don't take any parameters, a |
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47 | test and call might even come out as a simple conditional jump. */ |
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48 | void |
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49 | __gmp_sqrt_of_negative (void) |
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50 | { |
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51 | __gmp_exception (GMP_ERROR_SQRT_OF_NEGATIVE); |
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52 | } |
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53 | void |
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54 | __gmp_divide_by_zero (void) |
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55 | { |
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56 | __gmp_exception (GMP_ERROR_DIVISION_BY_ZERO); |
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57 | } |
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