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-- CC3019C1.ADA
 
--                             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.
--*
--  THIS IS GENERIC PACKAGE WHICH IS USED TO CHECK THE LEVEL OF
--  NESTED GENERICS SUPPORTED BY AN IMPLEMENTATION. IT IS USED
--  BY MAIN PROCEDURE CC3019C2M.ADA.
--
-- HISTORY:
--         EDWARD V. BERARD, 31 AUGUST 1990
 
WITH CC3019C0_LIST_CLASS ;
 
GENERIC
 
     TYPE ELEMENT IS LIMITED PRIVATE ;
 
     WITH PROCEDURE ASSIGN (SOURCE        : IN OUT ELEMENT ;
                            DESTINATION   : IN OUT ELEMENT) ;
 
     WITH FUNCTION "=" (LEFT  : IN ELEMENT ;
                        RIGHT : IN ELEMENT) RETURN BOOLEAN ;
 
PACKAGE CC3019C1_NESTED_GENERICS IS
 
     TYPE NESTED_GENERICS_TYPE IS LIMITED PRIVATE ;
 
     PROCEDURE COPY (SOURCE        : IN OUT NESTED_GENERICS_TYPE ;
                     DESTINATION   : IN OUT NESTED_GENERICS_TYPE) ;
 
     PROCEDURE SET_ELEMENT
                    (FOR_THIS_NGT_OBJECT : IN OUT NESTED_GENERICS_TYPE ;
                     TO_THIS_ELEMENT     : IN OUT ELEMENT) ;
 
     PROCEDURE SET_NUMBER
                    (FOR_THIS_NGT_OBJECT : IN OUT NESTED_GENERICS_TYPE ;
                     TO_THIS_NUMBER      : IN NATURAL) ;
 
     FUNCTION "=" (LEFT  : IN NESTED_GENERICS_TYPE ;
                   RIGHT : IN NESTED_GENERICS_TYPE) RETURN BOOLEAN ;
 
     FUNCTION ELEMENT_OF (THIS_NGT_OBJECT    : IN NESTED_GENERICS_TYPE)
          RETURN ELEMENT ;
 
     FUNCTION NUMBER_OF  (THIS_NGT_OBJECT    : IN NESTED_GENERICS_TYPE)
          RETURN NATURAL ;
 
     GENERIC
 
          TYPE ELEMENT IS LIMITED PRIVATE ;
 
          WITH PROCEDURE ASSIGN (SOURCE        : IN OUT ELEMENT ;
                                 DESTINATION   : IN OUT ELEMENT) ;
 
     PACKAGE GENERIC_TASK IS
 
          TASK TYPE PROTECTED_AREA IS
 
                    ENTRY STORE (ITEM    : IN OUT ELEMENT) ;
                    ENTRY GET   (ITEM    : IN OUT ELEMENT) ;
 
          END PROTECTED_AREA ;
 
     END GENERIC_TASK ;
 
     GENERIC
 
          TYPE ELEMENT IS LIMITED PRIVATE ;
 
          WITH PROCEDURE ASSIGN (SOURCE        : IN OUT ELEMENT ;
                                 DESTINATION   : IN OUT ELEMENT) ;
 
          WITH FUNCTION "=" (LEFT  : IN ELEMENT ;
                             RIGHT : IN ELEMENT) RETURN BOOLEAN ;
 
     PACKAGE STACK_CLASS IS
 
          TYPE STACK IS LIMITED PRIVATE ;
 
          OVERFLOW    : EXCEPTION ;
          UNDERFLOW   : EXCEPTION ;
 
          PROCEDURE PUSH (THIS_ELEMENT        : IN OUT ELEMENT ;
                          ON_TO_THIS_STACK    : IN OUT STACK) ;
 
          PROCEDURE POP  (THIS_ELEMENT        : IN OUT ELEMENT ;
                          OFF_THIS_STACK      : IN OUT STACK) ;
 
          PROCEDURE COPY  (THIS_STACK        : IN OUT STACK ;
                           TO_THIS_STACK    : IN OUT STACK) ;
 
          PROCEDURE CLEAR (THIS_STACK        : IN OUT STACK) ;
 
          GENERIC
 
               WITH PROCEDURE PROCESS (THIS_ELEMENT    : IN  ELEMENT ;
                                       CONTINUE        : OUT BOOLEAN) ;
 
          PROCEDURE ITERATE (OVER_THIS_STACK    : IN STACK) ;
 
          FUNCTION NUMBER_OF_ELEMENTS (ON_THIS_STACK    : IN STACK)
                    RETURN NATURAL ;
 
          FUNCTION "=" (LEFT  : IN STACK ;
                        RIGHT : IN STACK) RETURN BOOLEAN ;
 
     PRIVATE
 
          PACKAGE NEW_LIST_CLASS IS NEW
               CC3019C0_LIST_CLASS (ELEMENT => ELEMENT,
                                    ASSIGN  => ASSIGN,
                                    "="     => "=") ;
 
          TYPE STACK IS NEW NEW_LIST_CLASS.LIST ;
 
     END STACK_CLASS ;
 
PRIVATE
 
     TYPE NESTED_GENERICS_TYPE IS RECORD
          FIRST    : ELEMENT ;
          SECOND   : NATURAL ;
     END RECORD ;
 
END CC3019C1_NESTED_GENERICS ;
 
PACKAGE BODY CC3019C1_NESTED_GENERICS IS
 
     PROCEDURE COPY (SOURCE        : IN OUT NESTED_GENERICS_TYPE ;
                     DESTINATION   : IN OUT NESTED_GENERICS_TYPE) IS
 
     BEGIN  -- COPY
 
          ASSIGN (SOURCE        => SOURCE.FIRST,
                  DESTINATION   => DESTINATION.FIRST) ;
 
          DESTINATION.SECOND := SOURCE.SECOND ;
 
     END COPY ;
 
     PROCEDURE SET_ELEMENT
          (FOR_THIS_NGT_OBJECT : IN OUT NESTED_GENERICS_TYPE ;
          TO_THIS_ELEMENT     : IN OUT ELEMENT) IS
 
     BEGIN  -- SET_ELEMENT
 
          ASSIGN (SOURCE        => TO_THIS_ELEMENT,
                  DESTINATION   => FOR_THIS_NGT_OBJECT.FIRST) ;
 
     END SET_ELEMENT ;
 
     PROCEDURE SET_NUMBER
          (FOR_THIS_NGT_OBJECT : IN OUT NESTED_GENERICS_TYPE ;
          TO_THIS_NUMBER      : IN NATURAL) IS
 
     BEGIN  -- SET_NUMBER
 
          FOR_THIS_NGT_OBJECT.SECOND := TO_THIS_NUMBER ;
 
     END SET_NUMBER ;
 
     FUNCTION "=" (LEFT  : IN NESTED_GENERICS_TYPE ;
                   RIGHT : IN NESTED_GENERICS_TYPE) RETURN BOOLEAN IS
 
     BEGIN  -- "="
 
          IF (LEFT.FIRST = RIGHT.FIRST) AND
             (LEFT.SECOND = RIGHT.SECOND) THEN
                       RETURN TRUE ;
          ELSE
                    RETURN FALSE ;
          END IF ;
 
     END "=" ;
 
     FUNCTION ELEMENT_OF (THIS_NGT_OBJECT    : IN NESTED_GENERICS_TYPE)
          RETURN ELEMENT IS
 
     BEGIN  -- ELEMENT_OF
 
          RETURN THIS_NGT_OBJECT.FIRST ;
 
     END ELEMENT_OF ;
 
     FUNCTION NUMBER_OF (THIS_NGT_OBJECT    : IN NESTED_GENERICS_TYPE)
          RETURN NATURAL IS
 
     BEGIN  -- NUMBER_OF
 
          RETURN THIS_NGT_OBJECT.SECOND ;
 
     END NUMBER_OF ;
 
     PACKAGE BODY GENERIC_TASK IS
 
          TASK BODY PROTECTED_AREA IS
 
               LOCAL_STORE : ELEMENT ;
 
          BEGIN  -- PROTECTED_AREA
 
               LOOP
                    SELECT
                         ACCEPT STORE (ITEM    : IN OUT ELEMENT) DO
                              ASSIGN (SOURCE        => ITEM,
                                      DESTINATION   => LOCAL_STORE) ;
                         END STORE ;
                    OR
                         ACCEPT GET   (ITEM    : IN OUT ELEMENT) DO
                              ASSIGN (SOURCE        => LOCAL_STORE,
                                      DESTINATION   => ITEM) ;
                         END GET ;
                    OR
                         TERMINATE ;
                    END SELECT ;
               END LOOP ;
 
          END PROTECTED_AREA ;
 
     END GENERIC_TASK ;
 
     PACKAGE BODY STACK_CLASS IS
 
          PROCEDURE PUSH (THIS_ELEMENT        : IN OUT ELEMENT ;
                          ON_TO_THIS_STACK    : IN OUT STACK) IS
 
          BEGIN  -- PUSH
 
              NEW_LIST_CLASS.ADD (
                    THIS_ELEMENT    => THIS_ELEMENT,
                    TO_THIS_LIST    =>
                         NEW_LIST_CLASS.LIST (ON_TO_THIS_STACK)) ;
 
          EXCEPTION
 
              WHEN NEW_LIST_CLASS.OVERFLOW => RAISE OVERFLOW ;
 
          END PUSH ;
 
          PROCEDURE POP  (THIS_ELEMENT        : IN OUT ELEMENT ;
                          OFF_THIS_STACK      : IN OUT STACK) IS
 
          BEGIN  -- POP
 
               NEW_LIST_CLASS.DELETE (
                    THIS_ELEMENT     => THIS_ELEMENT,
                    FROM_THIS_LIST   =>
                        NEW_LIST_CLASS.LIST (OFF_THIS_STACK)) ;
 
          EXCEPTION
 
                    WHEN NEW_LIST_CLASS.UNDERFLOW => RAISE UNDERFLOW ;
 
          END POP ;
 
          PROCEDURE COPY  (THIS_STACK       : IN OUT STACK ;
                           TO_THIS_STACK    : IN OUT STACK) IS
 
          BEGIN  -- COPY
 
              NEW_LIST_CLASS.COPY (
                    THIS_LIST    => NEW_LIST_CLASS.LIST (THIS_STACK),
                    TO_THIS_LIST =>
                         NEW_LIST_CLASS.LIST (TO_THIS_STACK)) ;
 
          END COPY ;
 
          PROCEDURE CLEAR (THIS_STACK        : IN OUT STACK) IS
 
          BEGIN  -- CLEAR
 
               NEW_LIST_CLASS.CLEAR (NEW_LIST_CLASS.LIST (THIS_STACK)) ;
 
          END CLEAR ;
 
          PROCEDURE ITERATE (OVER_THIS_STACK  : IN STACK) IS
 
               PROCEDURE STACK_ITERATE IS NEW NEW_LIST_CLASS.ITERATE
                                        (PROCESS => PROCESS) ;
 
          BEGIN  -- ITERATE
 
               STACK_ITERATE (NEW_LIST_CLASS.LIST (OVER_THIS_STACK)) ;
 
          END ITERATE ;
 
          FUNCTION NUMBER_OF_ELEMENTS (ON_THIS_STACK    : IN STACK)
                    RETURN NATURAL IS
 
          BEGIN  -- NUMBER_OF_ELEMENTS
 
               RETURN NEW_LIST_CLASS.NUMBER_OF_ELEMENTS
                    (IN_THIS_LIST =>
                         NEW_LIST_CLASS.LIST (ON_THIS_STACK)) ;
 
          END NUMBER_OF_ELEMENTS ;
 
          FUNCTION "=" (LEFT  : IN STACK ;
                        RIGHT : IN STACK) RETURN BOOLEAN IS
 
          BEGIN  -- "="
 
               RETURN NEW_LIST_CLASS."=" (
                    LEFT  => NEW_LIST_CLASS.LIST (LEFT),
                   RIGHT => NEW_LIST_CLASS.LIST (RIGHT)) ;
 
          END "=" ;
 
     END STACK_CLASS ;
 
END CC3019C1_NESTED_GENERICS ;