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-- C3A0006.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 access to subprogram may be stored within data
-- structures, and that the access to subprogram can subsequently
-- be called.
--
-- TEST DESCRIPTION:
-- Declare an access to function type in a package specification.
-- Declare an array of the access type. Declare three different
-- functions that can be referred to by the access to function type.
--
-- In the main program, declare a key function that builds the array
-- by calling each function indirectly through the access value.
--
--
-- CHANGE HISTORY:
-- 06 Dec 94 SAIC ACVC 2.0
--
--!
package C3A0006_0 is
TC_Sine_Call : Integer := 0;
TC_Cos_Call : Integer := 0;
TC_Tan_Call : Integer := 0;
Sine_Value : Float := 4.0;
Cos_Value : Float := 8.0;
Tan_Value : Float := 10.0;
-- Type accesses to any function
type Trig_Function_Ptr is access function
(Angle : in Float) return Float;
function Sine (Angle : in Float) return Float;
function Cos (Angle : in Float) return Float;
function Tan (Angle : in Float) return Float;
end C3A0006_0;
-----------------------------------------------------------------------------
package body C3A0006_0 is
function Sine (Angle : in Float) return Float is
begin
TC_Sine_Call := TC_Sine_Call + 1;
Sine_Value := Sine_Value + Angle;
return Sine_Value;
end Sine;
function Cos (Angle: in Float) return Float is
begin
TC_Cos_Call := TC_Cos_Call + 1;
Cos_Value := Cos_Value - Angle;
return Cos_Value;
end Cos;
function Tan (Angle : in Float) return Float is
begin
TC_Tan_Call := TC_Tan_Call + 1;
Tan_Value := (Tan_Value + (Tan_Value * Angle));
return Tan_Value;
end Tan;
end C3A0006_0;
-----------------------------------------------------------------------------
with Report;
with C3A0006_0;
procedure C3A0006 is
Trig_Value, Theta : Float := 0.0;
Total_Routines : constant := 3;
Sine_Total : constant := 7.0;
Cos_Total : constant := 5.0;
Tan_Total : constant := 75.0;
Trig_Table : array (1 .. Total_Routines) of C3A0006_0.Trig_Function_Ptr;
-- Key function to build the table
function Call_Trig_Func (Func : C3A0006_0.Trig_Function_Ptr;
Operand : Float) return Float is
begin
return (Func(Operand));
end Call_Trig_Func;
begin
Report.Test ("C3A0006", "Check that access to subprogram may be " &
"stored within data structures, and that the access " &
"to subprogram can subsequently be called");
Trig_Table := (C3A0006_0.Sine'Access, C3A0006_0.Cos'Access,
C3A0006_0.Tan'Access);
-- increase the value of Theta to build the table
for I in 1 .. Total_Routines loop
Theta := Theta + 0.5;
for J in 1 .. Total_Routines loop
Trig_Value := Call_Trig_Func (Trig_Table(J), Theta);
end loop;
end loop;
if C3A0006_0.TC_Sine_Call /= Total_Routines
or C3A0006_0.TC_Cos_Call /= Total_Routines
or C3A0006_0.TC_Tan_Call /= Total_Routines then
Report.Failed ("Incorrect subprograms result");
end if;
if C3A0006_0.Sine_Value /= Sine_Total
or C3A0006_0.Cos_Value /= Cos_Total
or C3A0006_0.Tan_Value /= Tan_Total then
Report.Failed ("Incorrect values returned from subprograms");
end if;
if Trig_Value /= Tan_Total then
Report.Failed ("Incorrect call order.");
end if;
Report.Result;
end C3A0006;
|
