[project @ 1998-06-05 14:37:48 by simonm]

[ghc-hetmet.git] / ghc / rts / gmp / urandom.h

diff --git a/ghc/rts/gmp/urandom.h b/ghc/rts/gmp/urandom.h
new file mode 100644 (file)
index 0000000..994e7bd
--- /dev/null
+++ b/ghc/rts/gmp/urandom.h
@@ -0,0 +1,64 @@
+/* urandom.h -- define urandom returning a full unsigned long random value.
+
+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. */
+
+#if defined (__hpux) || defined (__svr4__) || defined (__SVR4)
+/* HPUX lacks random().  */
+static inline unsigned long
+urandom ()
+{
+  return mrand48 ();
+}
+#define __URANDOM
+#endif
+
+#if defined (__alpha) && !defined (__URANDOM)
+/* DEC OSF/1 1.2 random() returns a double.  */
+long mrand48 ();
+static inline unsigned long
+urandom ()
+{
+  return mrand48 () | (mrand48 () << 32);
+}
+#define __URANDOM
+#endif
+
+#if BITS_PER_MP_LIMB == 32 && !defined (__URANDOM)
+long random ();
+static inline unsigned long
+urandom ()
+{
+  /* random() returns 31 bits, we want 32.  */
+  return random () ^ (random () << 1);
+}
+#define __URANDOM
+#endif
+
+#if BITS_PER_MP_LIMB == 64 && !defined (__URANDOM)
+long random ();
+static inline unsigned long
+urandom ()
+{
+  /* random() returns 31 bits, we want 64.  */
+  return random () ^ (random () << 31) ^ (random () << 62);
+}
+#define __URANDOM
+#endif
+