cxf2005.a

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-- CXF2005.A
--
--                             Grant of Unlimited Rights
--
--     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
--     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained 
--     unlimited rights in the software and documentation contained herein.
--     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making 
--     this public release, the Government intends to confer upon all 
--     recipients unlimited rights  equal to those held by the Government.  
--     These rights include rights to use, duplicate, release or disclose the 
--     released technical data and computer software in whole or in part, in 
--     any manner and for any purpose whatsoever, and to have or permit others 
--     to do so.
--
--                                    DISCLAIMER
--
--     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED 
--     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
--     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE 
--     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
--     PARTICULAR PURPOSE OF SAID MATERIAL.
--*
--
-- OBJECTIVE:
--      Check that the multiplying operators for a decimal fixed point type
--      return values that are integral multiples of the small of the type.
--      Check the case where one operand is of the predefined type Integer.
--
-- TEST DESCRIPTION:
--      Two decimal fixed point types A and B are declared, one with a
--      Machine_Radix value of 2, and one with a value of 10. A variable of
--      each type is multiplied repeatedly by a series of different Integer
--      values. A cumulative result is kept and compared to an expected
--      final result. Similar checks are performed for division.
--
-- APPLICABILITY CRITERIA:
--      This test is only applicable for a compiler attempting validation
--      for the Information Systems Annex.
--
--
-- CHANGE HISTORY:
--      28 Mar 96   SAIC    Prerelease version for ACVC 2.1.
--
--!

generic
   type Decimal_Fixed  is delta <> digits <>;
package CXF2005_0 is

   function Multiply (Operand  : Decimal_Fixed;
                      Interval : Integer) return Decimal_Fixed;

   function Divide   (Operand  : Decimal_Fixed;
                      Interval : Integer) return Decimal_Fixed;

end CXF2005_0;


     --==================================================================--


package body CXF2005_0 is

   function Multiply (Operand  : Decimal_Fixed;
                      Interval : Integer) return Decimal_Fixed is
   begin
      return Operand * Interval;  -- Fixed-Integer multiplication.
   end Multiply;


   function Divide (Operand  : Decimal_Fixed;
                    Interval : Integer) return Decimal_Fixed is
   begin
      return Operand / Interval;  -- Fixed-Integer division.
   end Divide;

end CXF2005_0;


     --==================================================================--


package CXF2005_1 is

               ---=---=---=---=---=---=---=---=---=---=---

   type Interest_Rate is delta 0.001 range 0.0 .. 1_000.0;
   for Interest_Rate'Small use 0.001;            -- Power of 10.

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   type Money_Radix2 is delta 0.01 digits 11;    -- range -999,999,999.99 ..
   for Money_Radix2'Machine_Radix use 2;         --       +999,999,999.99

   function Factor (Rate     : Interest_Rate;
                    Interval : Integer) return Money_Radix2;

               ---=---=---=---=---=---=---=---=---=---=---

   type Money_Radix10 is delta 0.01 digits 11;   -- range -999,999,999.99 ..
   for Money_Radix10'Machine_Radix use 10;       --       +999,999,999.99

   function Factor (Rate   : Interest_Rate;
                    Interval : Integer) return Money_Radix10;

               ---=---=---=---=---=---=---=---=---=---=---

end CXF2005_1;


     --==================================================================--


package body CXF2005_1 is

               ---=---=---=---=---=---=---=---=---=---=---

   function Factor (Rate   : Interest_Rate;
                    Interval : Integer) return Money_Radix2 is
   begin
      return Money_Radix2( Rate / Interval );
   end Factor;

               ---=---=---=---=---=---=---=---=---=---=---

   function Factor (Rate   : Interest_Rate;
                    Interval : Integer) return Money_Radix10 is
   begin
      return Money_Radix10( Rate / Interval );
   end Factor;

               ---=---=---=---=---=---=---=---=---=---=---

end CXF2005_1;


     --==================================================================--


with CXF2005_0;
with CXF2005_1;

with Report;
procedure CXF2005 is

   Loop_Count : constant := 25_000;
   type Loop_Range is range 1 .. Loop_Count;

begin

   Report.Test ("CXF2005", "Check decimal multiplication and division, " &
                           "where one operand type is Integer");


               ---=---=---=---=---=---=---=---=---=---=---


   RADIX_2_SUBTESTS:
   declare
      package Radix_2 is new CXF2005_0 (CXF2005_1.Money_Radix2);
      use type CXF2005_1.Money_Radix2;
   begin

      RADIX_2_MULTIPLICATION:
      declare
         Rate           : constant CXF2005_1.Interest_Rate := 0.127;
         Period         : constant Integer                 := 12;

         Expected       : constant CXF2005_1.Money_Radix2  := 2_624.88;
         Balance        :          CXF2005_1.Money_Radix2  := 1_000.00;

         Operand        :          CXF2005_1.Money_Radix2;
         Increment      :          CXF2005_1.Money_Radix2;
         Interval       :          Integer;
      begin

         for I in Loop_Range loop
            Interval  := (Integer(I) mod Period) + 1;  -- Range from 1 to 12.
            Operand   := CXF2005_1.Factor (Rate, Period);
            Increment := Radix_2.Multiply (Operand, Interval);
            Balance   := Balance + Increment;
         end loop;

         if Balance /= Expected then
            Report.Failed ("Error: Radix 2 multiply");
         end if;

      end RADIX_2_MULTIPLICATION;



      RADIX_2_DIVISION:
      declare
         Rate           : constant CXF2005_1.Interest_Rate := 0.377;
         Period         : constant Integer                 := 12;

         Expected       : constant CXF2005_1.Money_Radix2  :=  36_215.58;
         Balance        :          CXF2005_1.Money_Radix2  := 456_985.01;

         Operand        :          CXF2005_1.Money_Radix2;
         Increment      :          CXF2005_1.Money_Radix2;
         Interval       :          Integer;
      begin

         for I in Loop_Range loop
            Interval  := (Integer(I+1000) mod (200*Period)) + 1; -- 1 .. 2400.
            Operand   := CXF2005_1.Factor (Rate, Period);
            Increment := Radix_2.Divide (Balance, Interval);
            Balance   := Balance - (Operand * Increment);
         end loop;

         if Balance /= Expected then
            Report.Failed ("Error: Radix 2 divide");
         end if;

      end RADIX_2_DIVISION;

   end RADIX_2_SUBTESTS;


               ---=---=---=---=---=---=---=---=---=---=---


   RADIX_10_SUBTESTS:
   declare
      package Radix_10 is new CXF2005_0 (CXF2005_1.Money_Radix10);
      use type CXF2005_1.Money_Radix10;
   begin

      RADIX_10_MULTIPLICATION:
      declare
         Rate           : constant CXF2005_1.Interest_Rate := 0.721;
         Period         : constant Integer                 := 12;

         Expected       : constant CXF2005_1.Money_Radix10 := 9_875.62;
         Balance        :          CXF2005_1.Money_Radix10 :=   126.34;

         Operand        :          CXF2005_1.Money_Radix10;
         Increment      :          CXF2005_1.Money_Radix10;
         Interval       :          Integer;
      begin

         for I in Loop_Range loop
            Interval  := (Integer(I) mod Period) + 1;  -- Range from 1 to 12.
            Operand   := CXF2005_1.Factor (Rate, Period);
            Increment := Radix_10.Multiply (Operand, Interval);
            Balance   := Balance + Increment;
         end loop;

         if Balance /= Expected then
            Report.Failed ("Error: Radix 10 multiply");
         end if;

      end RADIX_10_MULTIPLICATION;


      RADIX_10_DIVISION:
      declare
         Rate           : constant CXF2005_1.Interest_Rate := 0.547;
         Period         : constant Integer                 := 12;

         Expected       : constant CXF2005_1.Money_Radix10 :=  26_116.37;
         Balance        :          CXF2005_1.Money_Radix10 := 770_082.46;

         Operand        :          CXF2005_1.Money_Radix10;
         Increment      :          CXF2005_1.Money_Radix10;
         Interval       :          Integer;
      begin

         for I in Loop_Range loop
            Interval  := (Integer(I+1000) mod (200*Period)) + 1; -- 1 .. 2400.
            Operand   := CXF2005_1.Factor (Rate, Period);
            Increment := Radix_10.Divide (Balance, Interval);
            Balance   := Balance - (Operand * Increment);
         end loop;

         if Balance /= Expected then
            Report.Failed ("Error: Radix 10 divide");
         end if;

      end RADIX_10_DIVISION;

   end RADIX_10_SUBTESTS;


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   Report.Result;

end CXF2005;