old-autovect-branch/gcc/testsuite/ada/acats/support/fc51a00.a

   1 -- FC51A00.A
   2 --
   3 --                             Grant of Unlimited Rights
   4 --
   5 --     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
   6 --     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
   7 --     unlimited rights in the software and documentation contained herein.
   8 --     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making
   9 --     this public release, the Government intends to confer upon all
  10 --     recipients unlimited rights  equal to those held by the Government.
  11 --     These rights include rights to use, duplicate, release or disclose the
  12 --     released technical data and computer software in whole or in part, in
  13 --     any manner and for any purpose whatsoever, and to have or permit others
  14 --     to do so.
  15 --
  16 --                                    DISCLAIMER
  17 --
  18 --     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
  19 --     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
  20 --     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
  21 --     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
  22 --     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
  23 --     PARTICULAR PURPOSE OF SAID MATERIAL.
  24 --*
  25 --
  26 -- FOUNDATION DESCRIPTION:
  27 --      This foundation defines a fraction type abstraction. Fractions are
  28 --      implemented as records with two scalar components: a numerator
  29 --      of type integer and a denominator of type positive. Fractions are
  30 --      created via an overloaded "/" operator.
  31 --
  32 -- CHANGE HISTORY:
  33 --      06 Dec 94   SAIC    ACVC 2.0
  34 --
  35 --!
  36
  37 package FC51A00 is   -- Fraction type abstraction.
  38
  39    type Fraction_Type is private;
  40
  41    -- Create a fraction object by integer division.
  42    function "/" (Left, Right : Integer) return Fraction_Type;
  43
  44    -- Change the sign of a fraction.
  45    function "-" (Frac : Fraction_Type) return Fraction_Type;
  46
  47    -- Return value of numerator as integer.
  48    function Numerator (Frac : Fraction_Type) return Integer;
  49
  50    -- Return value of denominator as integer.
  51    function Denominator (Frac : Fraction_Type) return Integer;
  52
  53    -- ... Other operations on fraction types.
  54
  55 private
  56
  57    type Fraction_Type is record
  58       Numerator   : Integer;
  59       Denominator : Positive;
  60    end record;
  61
  62 end FC51A00;
  63
  64
  65      --==================================================================--
  66
  67
  68 package body FC51A00 is
  69
  70    function "/" (Left, Right : Integer) return Fraction_Type is
  71       Result : Fraction_Type;
  72    begin
  73       Result.Numerator   := Left;
  74       Result.Denominator := Right;
  75       return Result;
  76    end "/";
  77
  78
  79    function "-" (Frac : Fraction_Type) return Fraction_Type is
  80       Result : Fraction_Type := Frac;
  81    begin
  82       Result.Numerator := -(Result.Numerator);
  83       return Result;
  84    end "-";
  85
  86
  87    function Numerator (Frac : Fraction_Type) return Integer is
  88    begin
  89       return (Frac.Numerator);
  90    end Numerator;
  91
  92
  93    function Denominator (Frac : Fraction_Type) return Integer is
  94    begin
  95       return (Frac.Denominator);
  96    end Denominator;
  97
  98
  99 end FC51A00;