2007-08-14 Paul Hilfinger <hilfinger@adacore.com>

	* impunit.adb: Re-organize System.Random_Numbers and
	GNAT.Random_Numbers and add to builds.

	* Makefile.rtl: Add s-rannum.ad* and g-rannum.ad*, a-assert*

	* s-rannum.ads, s-rannum.adb, g-rannum.ads, g-rannum.adb: New files.

	* a-assert.ads, a-assert.adb: New files.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@127454 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 141 insertions, 0 deletions

diff --git a/gcc/ada/g-rannum.ads b/gcc/ada/g-rannum.ads
new file mode 100644
index 00000000000..441c3ce7258
--- /dev/null
+++ b/gcc/ada/g-rannum.ads
@@ -0,0 +1,141 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--                   G N A T . R A N D O M _ N U M B E R S                  --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 2007, Free Software Foundation, Inc.              --
+--                                                                          --
+-- GNAT is free software;  you can  redistribute it  and/or modify it under --
+-- terms of the  GNU General Public License as published  by the Free Soft- --
+-- ware  Foundation;  either version 2,  or (at your option) any later ver- --
+-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
+-- OUT 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  distributed with GNAT;  see file COPYING.  If not, write --
+-- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
+-- Boston, MA 02110-1301, USA.                                              --
+--                                                                          --
+-- As a special exception,  if other files  instantiate  generics from this --
+-- unit, or you link  this unit with other files  to produce an executable, --
+-- this  unit  does not  by itself cause  the resulting  executable  to  be --
+-- covered  by the  GNU  General  Public  License.  This exception does not --
+-- however invalidate  any other reasons why  the executable file  might be --
+-- covered by the  GNU Public License.                                      --
+--                                                                          --
+-- GNAT was originally developed  by the GNAT team at  New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  Extended pseudo-random number generation
+
+--  This package provides a type representing pseudo-random number
+--  generators, and subprograms to extract various distributions of numbers
+--  from them. It also provides types for representing initialization values
+--  and snapshots of internal generator state, which permit reproducible
+--  pseudo-random streams.
+
+--  The generator currently provided by this package has an extremely long
+--  period (at least 2**19937-1), and passes the Big Crush test suite, with
+--  the exception of the two linear complexity tests. Therefore, it is
+--  suitable for simulations, but should not be used as a cryptographic
+--  pseudo-random source without additional processing.
+
+--  The design of this package effects some simplification from that of
+--  the standard Ada.Numerics packages. There is no separate State type;
+--  the Generator type itself suffices for this purpose. The parameter
+--  modes on Reset procedures better reflect the effect of these routines.
+
+with System.Random_Numbers;
+with Interfaces; use Interfaces;
+
+package GNAT.Random_Numbers is
+
+   type Generator is limited private;
+   subtype Initialization_Vector is
+     System.Random_Numbers.Initialization_Vector;
+
+   function Random (Gen : Generator) return Float;
+   function Random (Gen : Generator) return Long_Float;
+   --  Return pseudo-random numbers uniformly distributed on [0 .. 1)
+
+   function Random (Gen : Generator) return Interfaces.Integer_32;
+   function Random (Gen : Generator) return Interfaces.Unsigned_32;
+   function Random (Gen : Generator) return Interfaces.Integer_64;
+   function Random (Gen : Generator) return Interfaces.Unsigned_64;
+   function Random (Gen : Generator) return Integer;
+   function Random (Gen : Generator) return Long_Integer;
+   --  Return pseudo-random numbers uniformly distributed on T'First .. T'Last
+   --  for various builtin integer types.
+
+   generic
+      type Result_Subtype is (<>);
+      Default_Min : Result_Subtype := Result_Subtype'Val (0);
+   function Random_Discrete
+     (Gen   : Generator;
+      Min   : Result_Subtype := Default_Min;
+      Max   : Result_Subtype := Result_Subtype'Last) return Result_Subtype;
+   --  Returns pseudo-random numbers uniformly distributed on Min .. Max
+
+   generic
+      type Result_Subtype is digits <>;
+   function Random_Float (Gen   : Generator) return Result_Subtype;
+   --  Returns pseudo-random numbers uniformly distributed on [0 .. 1)
+
+   function Random_Gaussian (Gen : Generator) return Long_Float;
+   function Random_Gaussian (Gen : Generator) return Float;
+   --  Returns pseudo-random numbers normally distributed value with mean 0
+   --  and standard deviation 1.0.
+
+   procedure Reset (Gen : out Generator);
+   --  Re-initialize the state of Gen from the time of day
+
+   procedure Reset
+     (Gen       : out Generator;
+      Initiator : Initialization_Vector);
+   procedure Reset
+     (Gen       : out Generator;
+      Initiator : Interfaces.Integer_32);
+   procedure Reset
+     (Gen       : out Generator;
+      Initiator : Interfaces.Unsigned_32);
+   procedure Reset
+     (Gen       : out Generator;
+      Initiator : Integer);
+   --  Re-initialize Gen based on the Initiator in various ways. Identical
+   --  values of Initiator cause identical sequences of values.
+
+   procedure Reset (Gen : out Generator; From_State : Generator);
+   --  Causes the state of Gen to be identical to that of From_State; Gen
+   --  and From_State will produce identical sequences of values subsequently.
+
+   procedure Reset (Gen : out Generator; From_Image : String);
+   function Image (Gen : Generator) return String;
+   --  The call
+   --     Reset (Gen2, Image (Gen1))
+   --  has the same effect as Reset (Gen2, Gen1);
+
+   Max_Image_Width : constant :=
+     System.Random_Numbers.Max_Image_Width + 2 + 20 + 5;
+   --  Maximum possible length of result of Image (...)
+
+private
+
+   type Generator is limited record
+      Rep : System.Random_Numbers.Generator;
+
+      Have_Gaussian : Boolean;
+      --  The algorithm used for Random_Gaussian produces deviates in
+      --  pairs. Have_Gaussian is true iff Random_Gaussian has returned one
+      --  member of the pair and Next_Gaussian contains the other.
+
+      Next_Gaussian : Long_Float;
+      --  Next random deviate to be produced by Random_Gaussian, if
+      --  Have_Gaussian.
+   end record;
+
+end GNAT.Random_Numbers;