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/* mpz_realloc2 -- change allocated data size.
Copyright 2001, 2002, 2008 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 <stdio.h>
#include "gmp.h"
#include "gmp-impl.h"
void
mpz_realloc2 (mpz_ptr m, mp_bitcnt_t bits)
{
mp_size_t new_alloc;
bits -= (bits != 0); /* Round down, except if 0 */
new_alloc = 1 + bits / GMP_NUMB_BITS;
if (sizeof (unsigned long) > sizeof (int)) /* param vs _mp_size field */
{
if (UNLIKELY (new_alloc > INT_MAX))
{
fprintf (stderr, "gmp: overflow in mpz type\n");
abort ();
}
}
PTR(m) = __GMP_REALLOCATE_FUNC_LIMBS (PTR(m), ALLOC(m), new_alloc);
ALLOC(m) = new_alloc;
/* Don't create an invalid number; if the current value doesn't fit after
reallocation, clear it to 0. */
if (ABSIZ(m) > new_alloc)
SIZ(m) = 0;
}
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