1-- C641001.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-- OBJECTIVE:
27--      Check that actual parameters passed by reference are view converted
28--      to the nominal subtype of the formal parameter.
29--
30-- TEST DESCRIPTION:
31--      Check that sliding is allowed for formal parameters, especially
32--      check cases that would have caused errors in Ada'83.
33--      Check that length check for a formal parameter (esp out mode)
34--      is performed before the call, not after.
35--
36--  notes: 6.2; by reference ::= tagged, task, protected,
37--                       limited (nonprivate), or composite containing such
38--         4.6; view conversion
39--
40--
41-- CHANGE HISTORY:
42--      26 JAN 96   SAIC   Initial version
43--      04 NOV 96   SAIC   Commentary revision for release 2.1
44--      27 FEB 97   PWB.CTA Corrected reference to the wrong string
45--!
46
47----------------------------------------------------------------- C641001_0
48
49package C641001_0 is
50
51  subtype String_10 is String(1..10);
52
53  procedure Check_String_10( S : out String_10; Start, Stop: Natural );
54
55  procedure Check_Illegal_Slice_Reference( Slice_Passed : in out String;
56                                           Index: Natural );
57
58  type Tagged_Data(Bound: Natural) is tagged record
59    Data_Item : String(1..Bound) := (others => '*');
60  end record;
61
62  type Tag_List is array(Natural range <>) of Tagged_Data(5);
63
64  subtype Tag_List_10 is Tag_List(1..10);
65
66  procedure Check_Tag_Slice( TL : in out Tag_List_10 );
67
68  procedure Check_Out_Tagged_Data( Formal : out Tagged_Data );
69
70end C641001_0;
71
72-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
73
74with Report;
75with TCTouch;
76package body C641001_0 is
77
78  String_Data : constant String := "1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZ";
79
80  procedure Check_String_10( S : out String_10; Start, Stop: Natural ) is
81  begin
82    if S'Length /= 10 then
83      Report.Failed("Length check not performed prior to execution");
84    end if;
85    S := String_Data(Start..Stop);
86  exception
87    when others => Report.Failed("Exception encountered in Check_String_10");
88  end Check_String_10;
89
90  procedure Check_Illegal_Slice_Reference( Slice_Passed : in out String;
91                                           Index: Natural ) is
92  begin
93    -- essentially "do-nothing" for optimization foilage...
94    if Slice_Passed(Index) in Character then
95    -- Intent is    ^^^^^  should raise Constraint_Error
96      Report.Failed("Illegal Slice provided legal character");
97    else
98      Report.Failed("Illegal Slice provided illegal character");
99    end if;
100  exception
101    when Constraint_Error =>
102      null; -- expected case
103    when others =>
104      Report.Failed("Wrong exception in Check_Illegal_Slice_Reference");
105  end Check_Illegal_Slice_Reference;
106
107  procedure Check_Tag_Slice( TL : in out Tag_List_10 ) is
108    -- if the view conversion is not performed, one of the following checks
109    -- will fail (given data passed as 0..9 and then 2..11)
110  begin
111    Check_Under_Index:  -- index 0 should raise C_E
112    begin
113      TCTouch.Assert( TL(Report.Ident_Int(0)).Data_Item = "*****",
114                      "Index 0 (illegal); bad data" );
115      Report.Failed("Index 0 did not raise Constraint_Error");
116    exception
117      when Constraint_Error =>
118        null; -- expected case
119      when others =>
120        Report.Failed("Wrong exception in Check_Under_Index ");
121    end Check_Under_Index;
122
123    Check_Over_Index:  -- index 11 should raise C_E
124    begin
125      TCTouch.Assert( TL(Report.Ident_Int(11)).Data_Item = "*****",
126                      "Index 11 (illegal); bad data" );
127      Report.Failed("Index 11 did not raise Constraint_Error");
128    exception
129      when Constraint_Error =>
130        null; -- expected case
131      when others =>
132        Report.Failed("Wrong exception in Check_Over_Index ");
133    end Check_Over_Index;
134
135  end Check_Tag_Slice;
136
137  procedure Check_Out_Tagged_Data( Formal : out Tagged_Data ) is
138  begin
139    TCTouch.Assert( Formal.Data_Item = "*****", "out formal data bad" );
140    Formal.Data_Item(1) := '!';
141  end Check_Out_Tagged_Data;
142
143end C641001_0;
144
145------------------------------------------------------------------- C641001
146
147with Report;
148with TCTouch;
149with C641001_0;
150procedure C641001 is
151
152  function II( I: Integer ) return Integer renames Report.Ident_Int;
153        -- ^^ name chosen to allow embedding in calls
154
155  A_String_10 : C641001_0.String_10;
156  Slicable    : String(1..40);
157  Tag_Slices  : C641001_0.Tag_List(0..11);
158
159  Global_Data : String(1..26) := "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
160
161  procedure Check_Out_Sliding( Lo1, Hi1, Lo2, Hi2 : Natural ) is
162
163    subtype One_Constrained_String is String(Lo1..Hi1);   -- 1  5
164    subtype Two_Constrained_String is String(Lo2..Hi2);   -- 6 10
165
166    procedure Out_Param( Param : out One_Constrained_String ) is
167    begin
168      Param := Report.Ident_Str( Global_Data(Lo2..Hi2) );
169    end Out_Param;
170    Object : Two_Constrained_String;
171  begin
172    Out_Param( Object );
173    if Object /= Report.Ident_Str( Global_Data(Lo2..Hi2) ) then
174      Report.Failed("Bad result in Check_Out_Sliding");
175    end if;
176  exception
177    when others => Report.Failed("Exception in Check_Out_Sliding");
178  end Check_Out_Sliding;
179
180  procedure Check_Dynamic_Subtype_Cases(F_Lower,F_Upper: Natural;
181                                        A_Lower,A_Upper: Natural) is
182
183    subtype Dyn_String is String(F_Lower..F_Upper);
184
185    procedure Check_Dyn_Subtype_Formal_Out( Param : out Dyn_String ) is
186    begin
187      Param := Global_Data(11..20);
188    end Check_Dyn_Subtype_Formal_Out;
189
190    procedure Check_Dyn_Subtype_Formal_In( Param : in Dyn_String ) is
191    begin
192      if Param /= Global_Data(11..20) then
193        Report.Failed("Dynamic case, data mismatch");
194      end if;
195    end Check_Dyn_Subtype_Formal_In;
196
197    Stuff: String(A_Lower..A_Upper);
198
199  begin
200    Check_Dyn_Subtype_Formal_Out( Stuff );
201    Check_Dyn_Subtype_Formal_In( Stuff );
202  end Check_Dynamic_Subtype_Cases;
203
204begin  -- Main test procedure.
205
206  Report.Test ("C641001", "Check that actual parameters passed by " &
207                          "reference are view converted to the nominal " &
208                          "subtype of the formal parameter" );
209
210  -- non error cases for string slices
211
212  C641001_0.Check_String_10( A_String_10, 1, 10 );
213  TCTouch.Assert( A_String_10 = "1234567890", "Nominal case" );
214
215  C641001_0.Check_String_10( A_String_10, 11, 20 );
216  TCTouch.Assert( A_String_10 = "ABCDEFGHIJ", "Sliding to subtype" );
217
218  C641001_0.Check_String_10( Slicable(1..10), 1, 10 );
219  TCTouch.Assert( Slicable(1..10) = "1234567890", "Slice, no sliding" );
220
221  C641001_0.Check_String_10( Slicable(1..10), 21, 30 );
222  TCTouch.Assert( Slicable(1..10) = "KLMNOPQRST", "Sliding to slice" );
223
224  C641001_0.Check_String_10( Slicable(11..20), 11, 20 );
225  TCTouch.Assert( Slicable(11..20) = "ABCDEFGHIJ", "Sliding to same" );
226
227  C641001_0.Check_String_10( Slicable(21..30), 11, 20 );
228  TCTouch.Assert( Slicable(21..30) = "ABCDEFGHIJ", "Sliding up" );
229
230  -- error cases for string slices
231
232  C641001_0.Check_Illegal_Slice_Reference( Slicable(21..30), 20 );
233
234  C641001_0.Check_Illegal_Slice_Reference( Slicable(1..15), Slicable'Last );
235
236  -- checks for view converting actuals to formals
237
238  -- catch low bound fault
239  C641001_0.Check_Tag_Slice( Tag_Slices(II(0)..9) );     -- II ::= Ident_Int
240  TCTouch.Assert( Tag_Slices'First = 0, "Tag_Slices'First = 0" );
241  TCTouch.Assert( Tag_Slices'Last = 11, "Tag_Slices'Last = 11" );
242
243  -- catch high bound fault
244  C641001_0.Check_Tag_Slice( Tag_Slices(2..II(11)) );
245  TCTouch.Assert( Tag_Slices'First = 0, "Tag_Slices'First = 0" );
246  TCTouch.Assert( Tag_Slices'Last = 11, "Tag_Slices'Last = 11" );
247
248  Check_Formal_Association_Check:
249  begin
250    C641001_0.Check_String_10( Slicable, 1, 10 ); -- catch length fault
251    Report.Failed("Exception not raised at Check_Formal_Association_Check");
252  exception
253    when Constraint_Error =>
254      null; -- expected case
255    when others =>
256      Report.Failed("Wrong exception at Check_Formal_Association_Check");
257  end Check_Formal_Association_Check;
258
259  -- check for constrained actual, unconstrained formal
260  C641001_0.Check_Out_Tagged_Data( Tag_Slices(5) );
261  TCTouch.Assert( Tag_Slices(5).Data_Item = "!****",
262                  "formal out returned bad result" );
263
264  -- additional checks for out mode formal parameters, dynamic subtypes
265
266  Check_Out_Sliding( II(1),II(5), II(6),II(10) );
267
268  Check_Out_Sliding( 21,25, 6,10 );
269
270  Check_Dynamic_Subtype_Cases(F_Lower => II(1), F_Upper => II(10),
271                              A_Lower => II(1), A_Upper => II(10));
272
273  Check_Dynamic_Subtype_Cases(F_Lower => II(21), F_Upper => II(30),
274                              A_Lower => II( 1), A_Upper => II(10));
275
276  Check_Dynamic_Subtype_Cases(F_Lower => II( 1), F_Upper => II(10),
277                              A_Lower => II(21), A_Upper => II(30));
278
279  Report.Result;
280
281end C641001;
282