Imported gcc-4.4.3

[msp430-gcc.git] / gmp / mpz / realloc2.c

diff --git a/gmp/mpz/realloc2.c b/gmp/mpz/realloc2.c
new file mode 100644 (file)
index 0000000..9c03c8b
--- /dev/null
+++ b/gmp/mpz/realloc2.c
@@ -0,0 +1,49 @@
+/* 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, unsigned long 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;
+}