[project @ 1996-01-08 20:28:12 by partain]

[ghc-hetmet.git] / ghc / runtime / gmp / mpz_realloc.c

diff --git a/ghc/runtime/gmp/mpz_realloc.c b/ghc/runtime/gmp/mpz_realloc.c
new file mode 100644 (file)
index 0000000..11a4df3
--- /dev/null
+++ b/ghc/runtime/gmp/mpz_realloc.c
@@ -0,0 +1,50 @@
+/* _mpz_realloc -- make the MP_INT have NEW_SIZE digits allocated.
+
+Copyright (C) 1991 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 General Public License as published by
+the Free Software Foundation; either version 2, 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with the GNU MP Library; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#include "gmp.h"
+#include "gmp-impl.h"
+
+void *
+#ifdef __STDC__
+_mpz_realloc (MP_INT *m, mp_size new_size)
+#else
+_mpz_realloc (m, new_size)
+     MP_INT *m;
+     mp_size new_size;
+#endif
+{
+  /* Never allocate zero space. */
+  if (new_size == 0)
+    new_size = 1;
+
+  m->d = (mp_ptr) (*_mp_reallocate_func) (m->d, m->alloc * BYTES_PER_MP_LIMB,
+                                         new_size * BYTES_PER_MP_LIMB);
+  m->alloc = new_size;
+
+#if 0
+  /* This might break some code that reads the size field after
+     reallocation, in the case the reallocated destination and a
+     source argument are identical.  */
+  if (ABS (m->size) > new_size)
+    m->size = 0;
+#endif
+
+  return (void *) m->d;
+}