Was urandom.c.

1 files changed, 65 insertions, 0 deletions

diff --git a/mpf/urandomb.c b/mpf/urandomb.c
new file mode 100644
index 000000000..d4d6817c9
--- /dev/null
+++ b/mpf/urandomb.c
@@ -0,0 +1,65 @@
+/* mpf_urandomb (rop, state) -- Generate a uniform pseudorandom real
+   number between 0 (inclusive) and 1 (exclusive), using STATE as the
+   random state previously initialized by a call to gmp_randinit().
+
+Copyright (C) 1999, 2000  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 Library General Public License as published by
+the Free Software Foundation; either version 2 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 Library General Public
+License for more details.
+
+You should have received a copy of the GNU Library 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"
+
+/* FIXME: Rename file to urandomb.c. */
+
+void
+#if __STDC__
+mpf_urandomb (mpf_t rop, gmp_randstate_t rstate)
+#else
+mpf_urandomb (rop, rstate)
+     mpf_t rop;
+     gmp_randstate_t rstate;
+#endif
+{
+  mp_ptr rp;
+  mp_size_t nlimbs;
+  mp_exp_t exp;
+
+  rp = PTR (rop);
+  nlimbs = PREC (rop);
+
+  _gmp_rand (rp, rstate, nlimbs * BITS_PER_MP_LIMB);
+
+  exp = 0;
+  while (nlimbs != 0 && rp[nlimbs - 1] == 0)
+    {
+      nlimbs--;
+      exp--;
+    }
+  EXP (rop) = exp;
+  SIZ (rop) = nlimbs;
+
+#if 0
+  /* If nbits isn't a multiple of BITS_PER_MP_LIMB, shift.  */
+  if (nlimbs != 0)
+    {
+      if (nbits % BITS_PER_MP_LIMB != 0)
+	mpn_lshift (rp, rp, nlimbs,
+		    BITS_PER_MP_LIMB - nbits % BITS_PER_MP_LIMB);
+    }
+#endif
+}