Initial revision

1 files changed, 65 insertions, 0 deletions

diff --git a/mpf/random2.c b/mpf/random2.c
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--- /dev/null
+++ b/mpf/random2.c
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+/* mpf_random2 -- Generate a positive random mpf_t of specified size, with
+   long runs of consecutive ones and zeros in the binary representation.
+   Intended for testing of other MP routines.
+
+Copyright (C) 1995, 1996 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"
+
+#if defined (__hpux) || defined (__alpha__)  || defined (__svr4__) || defined (__SVR4)
+/* HPUX lacks random().  DEC OSF/1 1.2 random() returns a double.  */
+long mrand48 ();
+static inline long
+random ()
+{
+  return mrand48 ();
+}
+#else
+long random ();
+#endif
+
+void
+#if __STDC__
+mpf_random2 (mpf_ptr x, mp_size_t size, mp_exp_t exp)
+#else
+mpf_random2 (x, size, exp)
+     mpf_ptr x;
+     mp_size_t size;
+     mp_exp_t exp;
+#endif
+{
+  mp_size_t asize;
+  mp_size_t prec = x->_mp_prec;
+
+  asize = ABS (size);
+  if (asize != 0)
+    {
+      if (asize > prec + 1)
+	asize = prec + 1;
+
+      mpn_random2 (x->_mp_d, asize);
+    }
+
+  if (exp != 0)
+    exp = random () % (2 * exp) - exp;
+  x->_mp_exp = asize == 0 ? 0 : exp;
+  x->_mp_size = size < 0 ? -asize : asize;
+}