Reorganisation of the source tree

[ghc-hetmet.git] / rts / gmp / mpz / random.c

diff --git a/rts/gmp/mpz/random.c b/rts/gmp/mpz/random.c
new file mode 100644 (file)
index 0000000..60d9113
--- /dev/null
+++ b/rts/gmp/mpz/random.c
@@ -0,0 +1,56 @@
+/* mpz_random -- Generate a random mpz_t of specified size.
+   This function is non-portable and generates poor random numbers.
+
+Copyright (C) 1991, 1993, 1994, 1995 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 2.1 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; see the file COPYING.LIB.  If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+MA 02111-1307, USA. */
+
+#include "gmp.h"
+#include "gmp-impl.h"
+#include "urandom.h"
+
+void
+#if __STDC__
+mpz_random (mpz_ptr x, mp_size_t size)
+#else
+mpz_random (x, size)
+     mpz_ptr x;
+     mp_size_t size;
+#endif
+{
+  mp_size_t i;
+  mp_limb_t ran;
+  mp_ptr xp;
+  mp_size_t abs_size;
+
+  abs_size = ABS (size);
+
+  if (x->_mp_alloc < abs_size)
+    _mpz_realloc (x, abs_size);
+
+  xp = x->_mp_d;
+
+  for (i = 0; i < abs_size; i++)
+    {
+      ran = urandom ();
+      xp[i] = ran;
+    }
+
+  MPN_NORMALIZE (xp, abs_size);
+  x->_mp_size = size < 0 ? -abs_size : abs_size;
+}