1-- FA13A00.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 code is used to check visibility of separate 28-- subunit of child packages. 29-- Declares a package containing type definitions; package will be 30-- with'ed by the root of the elevator abstraction. 31-- 32-- Declare an elevator abstraction in a parent root package which manages 33-- basic operations. This package has a private part. Declare a 34-- private child package which calculates the floors for going up or 35-- down. Declare a public child package which provides the actual 36-- operations. 37-- 38-- CHANGE HISTORY: 39-- 06 Dec 94 SAIC ACVC 2.0 40-- 41--! 42 43-- Simulates a fragment of an elevator operation application. 44 45package FA13A00_0 is -- Building Manager 46 47 type Electrical_Power is (Off, V120, V240); 48 Power : Electrical_Power := V120; 49 50 -- other type definitions and procedure declarations in real application. 51 52end FA13A00_0; 53 54-- No bodies provided for FA13A00_0. 55 56 --==================================================================-- 57 58package FA13A00_1 is -- Basic Elevator Operations 59 60 type Call_Waiting_Type is private; 61 type Floor is (Basement, Floor1, Floor2, Floor3, Penthouse); 62 type Floor_No is range Floor'Pos(Floor'First) .. Floor'Pos(Floor'Last); 63 Current_Floor : Floor := Floor1; 64 65 TC_Operation : boolean := true; 66 67 procedure Call (F : in Floor; C : in out Call_Waiting_Type); 68 procedure Clear_Calls (C : in out Call_Waiting_Type); 69 70private 71 type Call_Waiting_Type is array (Floor) of boolean; 72 Call_Waiting : Call_Waiting_Type := (others => false); 73 74end FA13A00_1; 75 76 77 --==================================================================-- 78 79package body FA13A00_1 is 80 81 -- Call the elevator. 82 83 procedure Call (F : in Floor; C : in out Call_Waiting_Type) is 84 begin 85 C (F) := true; 86 end Call; 87 88 -------------------------------------------- 89 90 -- Clear all calls of the elevator. 91 92 procedure Clear_Calls (C : in out Call_Waiting_Type) is 93 begin 94 C := (others => false); 95 end Clear_Calls; 96 97end FA13A00_1; 98 99 --==================================================================-- 100 101-- Private child package of an elevator application. This package calculates 102-- how many floors to go up or down. 103 104private package FA13A00_1.FA13A00_2 is -- Floor Calculation 105 106 -- Other type definitions in real application. 107 108 procedure Up (HowMany : in Floor_No); 109 110 procedure Down (HowMany : in Floor_No); 111 112end FA13A00_1.FA13A00_2; 113 114 --==================================================================-- 115 116package body FA13A00_1.FA13A00_2 is 117 118 -- Go up from the current floor. 119 120 procedure Up (HowMany : in Floor_No) is 121 begin 122 Current_Floor := Floor'val (Floor'pos (Current_Floor) + HowMany); 123 end Up; 124 125 -------------------------------------------- 126 127 -- Go down from the current floor. 128 129 procedure Down (HowMany : in Floor_No) is 130 begin 131 Current_Floor := Floor'val (Floor'pos (Current_Floor) - HowMany); 132 end Down; 133 134end FA13A00_1.FA13A00_2; 135 136 --==================================================================-- 137 138-- Public child package of an elevator application. This package provides 139-- the actual operation of the elevator. 140 141package FA13A00_1.FA13A00_3 is -- Move Elevator 142 143 -- Other type definitions in real application. 144 145 procedure Move_Elevator (F : in Floor; 146 C : in out Call_Waiting_Type); 147 148end FA13A00_1.FA13A00_3; 149 150 --==================================================================-- 151 152with FA13A00_1.FA13A00_2; -- Floor Calculation 153 154package body FA13A00_1.FA13A00_3 is 155 156 -- Going up or down depends on the current floor. 157 158 procedure Move_Elevator (F : in Floor; 159 C : in out Call_Waiting_Type) is 160 begin 161 if F > Current_Floor then 162 FA13A00_1.FA13A00_2.Up (Floor'Pos (F) - Floor'Pos (Current_Floor)); 163 FA13A00_1.Call (F, C); 164 elsif F < Current_Floor then 165 FA13A00_1.FA13A00_2.Down (Floor'Pos (Current_Floor) - Floor'Pos (F)); 166 FA13A00_1.Call (F, C); 167 end if; 168 169 end Move_Elevator; 170 171end FA13A00_1.FA13A00_3; 172