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