| -- C64005B.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 A SUBPROGRAM CAN BE CALLED RECURSIVELY AND THAT NON-LOCAL |
| -- VARIABLES AND CONSTANTS ARE PROPERLY ACCESSED FROM WITHIN RECURSIVE |
| -- INVOCATIONS. |
| |
| -- CPP 7/2/84 |
| |
| WITH REPORT; USE REPORT; |
| PROCEDURE C64005B IS |
| |
| COUNT : INTEGER := 0; |
| TWENTY : CONSTANT INTEGER := 20; |
| C1 : CONSTANT INTEGER := 1; |
| G1, G2, G3 : INTEGER := 0; |
| G4, G5 : INTEGER := 0; |
| |
| PROCEDURE R (A1 : INTEGER; A2 : IN OUT INTEGER; A3 : OUT INTEGER) |
| IS |
| C1 : CONSTANT INTEGER := 5; |
| TEN : CONSTANT INTEGER := 10; |
| J1, J2 : INTEGER := 1; |
| J3 : INTEGER := 0; |
| |
| PROCEDURE RECURSE (P1 : INTEGER; P2 : IN OUT INTEGER) IS |
| C1 : INTEGER := 2; |
| BEGIN -- RECURSE |
| C1 := IDENT_INT (10); |
| IF P1 < TWENTY THEN |
| RECURSE (P1 + C1, G2); |
| G1 := G1 + C64005B.C1; |
| G3 := G3 + P1; |
| P2 := P2 + IDENT_INT(2); |
| A2 := A2 + IDENT_INT(1); |
| J2 := J2 + R.C1; |
| END IF; |
| END RECURSE; |
| |
| BEGIN -- R |
| IF A2 < TEN THEN |
| A2 := A2 + C1; |
| RECURSE (0, J1); |
| J3 := J3 + TEN; |
| COUNT := COUNT + 1; |
| COMMENT ("ON PASS # " & INTEGER'IMAGE(COUNT)); |
| COMMENT ("VALUE OF A2 IS " & INTEGER'IMAGE(A2)); |
| COMMENT ("VALUE OF J3 IS " & INTEGER'IMAGE(J3)); |
| R (0, A2, J3); |
| J3 := J3 + A2; |
| END IF; |
| A3 := J1 + J3; |
| END R; |
| |
| BEGIN |
| TEST("C64005B", "RECURSIVE SUBPROGRAMS WITH ALL KINDS " & |
| "OF DATA ACCESS"); |
| |
| R (0, G4, G5); |
| |
| IF (COUNT /= 2) OR (G1 /= 4) OR |
| (G2 /= 4) OR (G3 /= 20) OR |
| (G4 /= 14) OR (G5 /= 35) THEN |
| FAILED ("RECURSIVE INVOCATIONS' DATA ACCESS IS NOT" & |
| " WORKING CORRECTLY"); |
| END IF; |
| |
| COMMENT ("VALUE OF COUNT IS " & INTEGER'IMAGE(COUNT)); |
| COMMENT ("VALUE OF G1 IS " & INTEGER'IMAGE(G1)); |
| COMMENT ("VALUE OF G2 IS " & INTEGER'IMAGE(G2)); |
| COMMENT ("VALUE OF G3 IS " & INTEGER'IMAGE(G3)); |
| COMMENT ("VALUE OF G4 IS " & INTEGER'IMAGE(G4)); |
| COMMENT ("VALUE OF G5 IS " & INTEGER'IMAGE(G5)); |
| |
| RESULT; |
| |
| EXCEPTION |
| WHEN PROGRAM_ERROR => |
| FAILED ("PROGRAM_ERROR RAISED"); |
| COMMENT ("VALUE OF COUNT IS " & INTEGER'IMAGE(COUNT)); |
| COMMENT ("VALUE OF G1 IS " & INTEGER'IMAGE(G1)); |
| COMMENT ("VALUE OF G2 IS " & INTEGER'IMAGE(G2)); |
| COMMENT ("VALUE OF G3 IS " & INTEGER'IMAGE(G3)); |
| COMMENT ("VALUE OF G4 IS " & INTEGER'IMAGE(G4)); |
| COMMENT ("VALUE OF G5 IS " & INTEGER'IMAGE(G5)); |
| RESULT; |
| |
| END C64005B; |