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-- FC70A00.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.
--*
--
-- FOUNDATION DESCRIPTION:
-- This file simulates a generic complex integer support package, to be
-- used for tests covering generic formal packages.
--
-- CHANGE HISTORY:
-- 06 Dec 94 SAIC ACVC 2.0
--
--!
generic -- Complex integer abstraction.
type Int_Type is range <>;
package FC70A00 is
-- Simulate a generic complex integer support package. Complex integers
-- are treated as coordinates in the Cartesian plane.
type Complex_Type is private;
Zero : constant Complex_Type; -- (0,0).
One : constant Complex_Type; -- (1,0).
function "-" (Right : Complex_Type) -- Invert a complex
return Complex_Type; -- integer.
function "+" (Left, Right : Complex_Type) -- Add two complex
return Complex_Type; -- integers.
function "*" (Left, Right : Complex_Type) -- Multiply two complex
return Complex_Type; -- integers.
function Reciprocal (Right : Complex_Type) -- Return the reciprocal
return Complex_Type; -- of a complex integer.
function Complex (Real, Imag : Int_Type) -- Create a complex
return Complex_Type; -- integer.
private
type Complex_Type is record
Real : Int_Type;
Imag : Int_Type;
end record;
Zero : constant Complex_Type := (Real => 0, Imag => 0);
One : constant Complex_Type := (Real => 1, Imag => 0);
end FC70A00;
--==================================================================--
package body FC70A00 is -- Complex integer abstraction.
function Complex (Real, Imag : Int_Type) return Complex_Type is
begin
return ( (Real, Imag) );
end Complex;
--==============================================--
function "-" (Right : Complex_Type) return Complex_Type is
begin
return ( (-Right.Real, -Right.Imag) );
end "-";
--==============================================--
function "+" (Left, Right : Complex_Type) return Complex_Type is
begin
return ( (Left.Real + Right.Real, Left.Imag + Right.Imag) );
end "+";
--==============================================--
function "*" (Left, Right : Complex_Type) return Complex_Type is
begin
return ( (Real => (Left.Real * Right.Real) - (Left.Imag * Right.Imag),
Imag => (Left.Imag * Right.Real) + (Left.Real * Right.Imag)) );
end "*";
--==============================================--
function Reciprocal (Right : Complex_Type) return Complex_Type is
Denominator : Int_Type := Right.Real**2 + Right.Imag**2;
begin -- NOTE: Results are truncated.
return ( (Right.Real/Denominator, -Right.Imag/Denominator) );
end Reciprocal;
end FC70A00;
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