1 | /* mpz_realloc2 -- change allocated data size. |
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2 | |
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3 | Copyright 2001, 2002 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 "gmp.h" |
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23 | #include "gmp-impl.h" |
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24 | |
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25 | void |
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26 | mpz_realloc2 (mpz_ptr m, unsigned long bits) |
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27 | { |
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28 | mp_ptr mp; |
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29 | mp_size_t new_alloc; |
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30 | |
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31 | new_alloc = (bits + GMP_NUMB_BITS-1) / GMP_NUMB_BITS; |
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32 | |
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33 | /* Never allocate zero space. */ |
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34 | new_alloc = MAX (new_alloc, 1); |
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35 | |
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36 | mp = __GMP_REALLOCATE_FUNC_LIMBS (PTR(m), ALLOC(m), new_alloc); |
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37 | PTR(m) = mp; |
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38 | ALLOC(m) = new_alloc; |
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39 | |
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40 | /* Don't create an invalid number; if the current value doesn't fit after |
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41 | reallocation, clear it to 0. */ |
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42 | if (ABSIZ(m) > new_alloc) |
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43 | SIZ(m) = 0; |
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44 | } |
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