-- FA13A00.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 foundation code is used to check visibility of separate -- subunit of child packages. -- Declares a package containing type definitions; package will be -- with'ed by the root of the elevator abstraction. -- -- Declare an elevator abstraction in a parent root package which manages -- basic operations. This package has a private part. Declare a -- private child package which calculates the floors for going up or -- down. Declare a public child package which provides the actual -- operations. -- -- CHANGE HISTORY: -- 06 Dec 94 SAIC ACVC 2.0 -- --! -- Simulates a fragment of an elevator operation application. package FA13A00_0 is -- Building Manager type Electrical_Power is (Off, V120, V240); Power : Electrical_Power := V120; -- other type definitions and procedure declarations in real application. end FA13A00_0; -- No bodies provided for FA13A00_0. --==================================================================-- package FA13A00_1 is -- Basic Elevator Operations type Call_Waiting_Type is private; type Floor is (Basement, Floor1, Floor2, Floor3, Penthouse); type Floor_No is range Floor'Pos(Floor'First) .. Floor'Pos(Floor'Last); Current_Floor : Floor := Floor1; TC_Operation : boolean := true; procedure Call (F : in Floor; C : in out Call_Waiting_Type); procedure Clear_Calls (C : in out Call_Waiting_Type); private type Call_Waiting_Type is array (Floor) of boolean; Call_Waiting : Call_Waiting_Type := (others => false); end FA13A00_1; --==================================================================-- package body FA13A00_1 is -- Call the elevator. procedure Call (F : in Floor; C : in out Call_Waiting_Type) is begin C (F) := true; end Call; -------------------------------------------- -- Clear all calls of the elevator. procedure Clear_Calls (C : in out Call_Waiting_Type) is begin C := (others => false); end Clear_Calls; end FA13A00_1; --==================================================================-- -- Private child package of an elevator application. This package calculates -- how many floors to go up or down. private package FA13A00_1.FA13A00_2 is -- Floor Calculation -- Other type definitions in real application. procedure Up (HowMany : in Floor_No); procedure Down (HowMany : in Floor_No); end FA13A00_1.FA13A00_2; --==================================================================-- package body FA13A00_1.FA13A00_2 is -- Go up from the current floor. procedure Up (HowMany : in Floor_No) is begin Current_Floor := Floor'val (Floor'pos (Current_Floor) + HowMany); end Up; -------------------------------------------- -- Go down from the current floor. procedure Down (HowMany : in Floor_No) is begin Current_Floor := Floor'val (Floor'pos (Current_Floor) - HowMany); end Down; end FA13A00_1.FA13A00_2; --==================================================================-- -- Public child package of an elevator application. This package provides -- the actual operation of the elevator. package FA13A00_1.FA13A00_3 is -- Move Elevator -- Other type definitions in real application. procedure Move_Elevator (F : in Floor; C : in out Call_Waiting_Type); end FA13A00_1.FA13A00_3; --==================================================================-- with FA13A00_1.FA13A00_2; -- Floor Calculation package body FA13A00_1.FA13A00_3 is -- Going up or down depends on the current floor. procedure Move_Elevator (F : in Floor; C : in out Call_Waiting_Type) is begin if F > Current_Floor then FA13A00_1.FA13A00_2.Up (Floor'Pos (F) - Floor'Pos (Current_Floor)); FA13A00_1.Call (F, C); elsif F < Current_Floor then FA13A00_1.FA13A00_2.Down (Floor'Pos (Current_Floor) - Floor'Pos (F)); FA13A00_1.Call (F, C); end if; end Move_Elevator; end FA13A00_1.FA13A00_3;