--- /dev/null
+/* _mpz_realloc -- make the mpz_t have NEW_ALLOC digits allocated.
+
+Copyright 1991, 1993, 1994, 1995, 2000, 2001, 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_realloc (mpz_ptr m, mp_size_t new_alloc)
+{
+ mp_ptr mp;
+
+ /* Never allocate zero space. */
+ new_alloc = MAX (new_alloc, 1);
+
+ if (sizeof (mp_size_t) == sizeof (int))
+ {
+ if (UNLIKELY (new_alloc > ULONG_MAX / GMP_NUMB_BITS))
+ {
+ fprintf (stderr, "gmp: overflow in mpz type\n");
+ abort ();
+ }
+ }
+ else
+ {
+ if (UNLIKELY (new_alloc > INT_MAX))
+ {
+ fprintf (stderr, "gmp: overflow in mpz type\n");
+ abort ();
+ }
+ }
+
+ mp = __GMP_REALLOCATE_FUNC_LIMBS (PTR(m), ALLOC(m), new_alloc);
+ PTR(m) = mp;
+ 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;
+
+ return (void *) mp;
+}