45 lines
1.4 KiB
C
45 lines
1.4 KiB
C
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/* mpz_realloc2 -- change allocated data size.
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Copyright 2001, 2002 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 "gmp.h"
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#include "gmp-impl.h"
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void
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mpz_realloc2 (mpz_ptr m, unsigned long bits)
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{
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mp_ptr mp;
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mp_size_t new_alloc;
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new_alloc = (bits + GMP_NUMB_BITS-1) / GMP_NUMB_BITS;
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/* Never allocate zero space. */
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new_alloc = MAX (new_alloc, 1);
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mp = __GMP_REALLOCATE_FUNC_LIMBS (PTR(m), ALLOC(m), new_alloc);
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PTR(m) = mp;
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ALLOC(m) = new_alloc;
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/* Don't create an invalid number; if the current value doesn't fit after
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reallocation, clear it to 0. */
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if (ABSIZ(m) > new_alloc)
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SIZ(m) = 0;
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}
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