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-- C64005D0M.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.
--*
-- CHECK THAT NESTED SUBPROGRAMS CAN BE CALLED RECURSIVELY AND THAT
-- NON-LOCAL VARIABLES AND FORMAL PARAMETERS ARE PROPERLY ACCESSED FROM
-- WITHIN RECURSIVE INVOCATIONS.  THIS TEST CHECKS THAT EVERY DISPLAY OR
-- STATIC CHAIN LEVEL CAN BE ACCESSED.
 
-- THIS TEST USES 3 LEVELS OF NESTED RECURSIVE PROCEDURES (SEPARATELY
-- COMPILED AS SUBUNITS).
 
-- SEPARATE FILES ARE:
--   C64005D0M THE MAIN PROCEDURE.
--   C64005DA  A RECURSIVE PROCEDURE SUBUNIT OF C64005D0M.
--   C64005DB  A RECURSIVE PROCEDURE SUBUNIT OF C64005DA.
--   C64005DC  A RECURSIVE PROCEDURE SUBUNIT OF C64005DB.
 
-- JRK 7/30/84
 
WITH REPORT; USE REPORT;
 
PROCEDURE C64005D0M IS
 
     SUBTYPE LEVEL IS CHARACTER RANGE 'A' .. 'C';
     SUBTYPE CALL IS CHARACTER RANGE '1' .. '3';
 
     MAX_LEV : CONSTANT := LEVEL'POS (LEVEL'LAST) -
                           LEVEL'POS (LEVEL'FIRST) + 1;
     T_LEN : CONSTANT := 2 * (1 + 3 * (MAX_LEV +
                                       MAX_LEV*(MAX_LEV+1)/2*2)) + 1;
     G_LEN : CONSTANT := 2 + 4 * MAX_LEV;
 
     TYPE TRACE IS
          RECORD
               E : NATURAL := 0;
               S : STRING (1 .. T_LEN);
          END RECORD;
 
     V : CHARACTER := IDENT_CHAR ('<');
     L : CHARACTER := IDENT_CHAR ('>');
     T : TRACE;
     G : STRING (1 .. G_LEN);
 
     PROCEDURE C64005DA (L : LEVEL; C : CALL; T : IN OUT TRACE) IS
          SEPARATE;
 
BEGIN
     TEST ("C64005D", "CHECK THAT NON-LOCAL VARIABLES AND FORMAL " &
                      "PARAMETERS AT ALL LEVELS OF NESTED " &
                      "RECURSIVE PROCEDURES ARE ACCESSIBLE (FOR " &
                      "3 LEVELS OF SEPARATELY COMPILED SUBUNITS)");
 
     -- APPEND V TO T.
     T.S (T.E+1) := V;
     T.E := T.E + 1;
 
     C64005DA (IDENT_CHAR(LEVEL'FIRST), IDENT_CHAR('1'), T);
 
     -- APPEND L TO T.
     T.S (T.E+1) := L;
     T.E := T.E + 1;
 
     COMMENT ("FINAL CALL TRACE LENGTH IS: " & INTEGER'IMAGE(T.E));
     COMMENT ("FINAL CALL TRACE IS: " & T.S(1..T.E));
     COMMENT ("GLOBAL SNAPSHOT IS: " & G);
 
     -- CHECK THAT T AND G ARE CORRECT BY COMPUTING THEM ITERATIVELY.
 
     DECLARE
          SUBTYPE LC_LEVEL IS CHARACTER RANGE ASCII.LC_A ..
               CHARACTER'VAL (CHARACTER'POS(ASCII.LC_A) + MAX_LEV - 1);
 
          CT : TRACE;
          CG : STRING (1 .. G_LEN);
     BEGIN
          COMMENT ("CORRECT FINAL CALL TRACE LENGTH IS: " &
                   INTEGER'IMAGE(T_LEN));
 
          IF T.E /= IDENT_INT (T_LEN) THEN
               FAILED ("WRONG FINAL CALL TRACE LENGTH");
 
          ELSE CT.S (CT.E+1) := '<';
               CT.E := CT.E + 1;
 
               FOR I IN LC_LEVEL LOOP
                    CT.S (CT.E+1) := '<';
                    CT.E := CT.E + 1;
 
                    FOR J IN LC_LEVEL'FIRST .. I LOOP
                         CT.S (CT.E+1) := J;
                         CT.S (CT.E+2) := '1';
                         CT.E := CT.E + 2;
                    END LOOP;
               END LOOP;
 
               FOR I IN LC_LEVEL LOOP
                    CT.S (CT.E+1) := '<';
                    CT.E := CT.E + 1;
 
                    FOR J IN LC_LEVEL'FIRST .. LC_LEVEL'PRED(I) LOOP
                         CT.S (CT.E+1) := J;
                         CT.S (CT.E+2) := '3';
                         CT.E := CT.E + 2;
                    END LOOP;
 
                    CT.S (CT.E+1) := I;
                    CT.S (CT.E+2) := '2';
                    CT.E := CT.E + 2;
 
                    CT.S (CT.E+1) := '<';
                    CT.E := CT.E + 1;
 
                    FOR J IN LC_LEVEL'FIRST .. I LOOP
                         CT.S (CT.E+1) := J;
                         CT.S (CT.E+2) := '3';
                         CT.E := CT.E + 2;
                    END LOOP;
               END LOOP;
 
               CT.S (CT.E+1) := '=';
               CT.E := CT.E + 1;
 
               FOR I IN REVERSE LEVEL LOOP
                    FOR J IN REVERSE LEVEL'FIRST .. I LOOP
                         CT.S (CT.E+1) := J;
                         CT.S (CT.E+2) := '3';
                         CT.E := CT.E + 2;
                    END LOOP;
 
                    CT.S (CT.E+1) := '>';
                    CT.E := CT.E + 1;
 
                    CT.S (CT.E+1) := I;
                    CT.S (CT.E+2) := '2';
                    CT.E := CT.E + 2;
 
                    FOR J IN REVERSE LEVEL'FIRST .. LEVEL'PRED(I) LOOP
                         CT.S (CT.E+1) := J;
                         CT.S (CT.E+2) := '3';
                         CT.E := CT.E + 2;
                    END LOOP;
 
                    CT.S (CT.E+1) := '>';
                    CT.E := CT.E + 1;
               END LOOP;
 
               FOR I IN REVERSE LEVEL LOOP
                    FOR J IN REVERSE LEVEL'FIRST .. I LOOP
                         CT.S (CT.E+1) := J;
                         CT.S (CT.E+2) := '1';
                         CT.E := CT.E + 2;
                    END LOOP;
 
                    CT.S (CT.E+1) := '>';
                    CT.E := CT.E + 1;
               END LOOP;
 
               CT.S (CT.E+1) := '>';
               CT.E := CT.E + 1;
 
               IF CT.E /= IDENT_INT (T_LEN) THEN
                    FAILED ("WRONG ITERATIVE TRACE LENGTH");
 
               ELSE COMMENT ("CORRECT FINAL CALL TRACE IS: " & CT.S);
 
                    IF T.S /= CT.S THEN
                         FAILED ("WRONG FINAL CALL TRACE");
                    END IF;
               END IF;
          END IF;
 
          DECLARE
               E : NATURAL := 0;
          BEGIN
               CG (1..2) := "<>";
               E := E + 2;
 
               FOR I IN LEVEL LOOP
                    CG (E+1) := LC_LEVEL'VAL (LEVEL'POS(I) -
                                              LEVEL'POS(LEVEL'FIRST) +
                                              LC_LEVEL'POS
                                                      (LC_LEVEL'FIRST));
                    CG (E+2) := '3';
                    CG (E+3) := I;
                    CG (E+4) := '3';
                    E := E + 4;
               END LOOP;
 
               COMMENT ("CORRECT GLOBAL SNAPSHOT IS: " & CG);
 
               IF G /= CG THEN
                    FAILED ("WRONG GLOBAL SNAPSHOT");
               END IF;
          END;
     END;
 
     RESULT;
END C64005D0M;
 

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