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1 149 jeremybenn
-- C641001.A
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--
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--                             Grant of Unlimited Rights
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--
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--     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
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--     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
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--     unlimited rights in the software and documentation contained herein.
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--     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making
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--     this public release, the Government intends to confer upon all
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--     recipients unlimited rights  equal to those held by the Government.
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--     These rights include rights to use, duplicate, release or disclose the
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--     released technical data and computer software in whole or in part, in
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--     any manner and for any purpose whatsoever, and to have or permit others
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--     to do so.
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--
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--                                    DISCLAIMER
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--
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--     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
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--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
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--     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
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--     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
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--     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
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--     PARTICULAR PURPOSE OF SAID MATERIAL.
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--*
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--
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-- OBJECTIVE:
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--      Check that actual parameters passed by reference are view converted
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--      to the nominal subtype of the formal parameter.
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--
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-- TEST DESCRIPTION:
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--      Check that sliding is allowed for formal parameters, especially
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--      check cases that would have caused errors in Ada'83.
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--      Check that length check for a formal parameter (esp out mode)
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--      is performed before the call, not after.
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--
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--  notes: 6.2; by reference ::= tagged, task, protected,
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--                       limited (nonprivate), or composite containing such
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--         4.6; view conversion
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--
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--
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-- CHANGE HISTORY:
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--      26 JAN 96   SAIC   Initial version
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--      04 NOV 96   SAIC   Commentary revision for release 2.1
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--      27 FEB 97   PWB.CTA Corrected reference to the wrong string
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--!
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----------------------------------------------------------------- C641001_0
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package C641001_0 is
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  subtype String_10 is String(1..10);
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  procedure Check_String_10( S : out String_10; Start, Stop: Natural );
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  procedure Check_Illegal_Slice_Reference( Slice_Passed : in out String;
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                                           Index: Natural );
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  type Tagged_Data(Bound: Natural) is tagged record
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    Data_Item : String(1..Bound) := (others => '*');
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  end record;
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  type Tag_List is array(Natural range <>) of Tagged_Data(5);
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  subtype Tag_List_10 is Tag_List(1..10);
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  procedure Check_Tag_Slice( TL : in out Tag_List_10 );
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  procedure Check_Out_Tagged_Data( Formal : out Tagged_Data );
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end C641001_0;
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-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
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with Report;
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with TCTouch;
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package body C641001_0 is
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  String_Data : constant String := "1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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  procedure Check_String_10( S : out String_10; Start, Stop: Natural ) is
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  begin
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    if S'Length /= 10 then
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      Report.Failed("Length check not performed prior to execution");
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    end if;
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    S := String_Data(Start..Stop);
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  exception
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    when others => Report.Failed("Exception encountered in Check_String_10");
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  end Check_String_10;
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  procedure Check_Illegal_Slice_Reference( Slice_Passed : in out String;
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                                           Index: Natural ) is
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  begin
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    -- essentially "do-nothing" for optimization foilage...
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    if Slice_Passed(Index) in Character then
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    -- Intent is    ^^^^^  should raise Constraint_Error
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      Report.Failed("Illegal Slice provided legal character");
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    else
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      Report.Failed("Illegal Slice provided illegal character");
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    end if;
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  exception
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    when Constraint_Error =>
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      null; -- expected case
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    when others =>
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      Report.Failed("Wrong exception in Check_Illegal_Slice_Reference");
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  end Check_Illegal_Slice_Reference;
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  procedure Check_Tag_Slice( TL : in out Tag_List_10 ) is
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    -- if the view conversion is not performed, one of the following checks
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    -- will fail (given data passed as 0..9 and then 2..11)
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  begin
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    Check_Under_Index:  -- index 0 should raise C_E
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    begin
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      TCTouch.Assert( TL(Report.Ident_Int(0)).Data_Item = "*****",
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                      "Index 0 (illegal); bad data" );
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      Report.Failed("Index 0 did not raise Constraint_Error");
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    exception
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      when Constraint_Error =>
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        null; -- expected case
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      when others =>
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        Report.Failed("Wrong exception in Check_Under_Index ");
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    end Check_Under_Index;
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    Check_Over_Index:  -- index 11 should raise C_E
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    begin
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      TCTouch.Assert( TL(Report.Ident_Int(11)).Data_Item = "*****",
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                      "Index 11 (illegal); bad data" );
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      Report.Failed("Index 11 did not raise Constraint_Error");
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    exception
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      when Constraint_Error =>
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        null; -- expected case
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      when others =>
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        Report.Failed("Wrong exception in Check_Over_Index ");
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    end Check_Over_Index;
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  end Check_Tag_Slice;
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  procedure Check_Out_Tagged_Data( Formal : out Tagged_Data ) is
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  begin
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    TCTouch.Assert( Formal.Data_Item = "*****", "out formal data bad" );
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    Formal.Data_Item(1) := '!';
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  end Check_Out_Tagged_Data;
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end C641001_0;
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------------------------------------------------------------------- C641001
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with Report;
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with TCTouch;
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with C641001_0;
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procedure C641001 is
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  function II( I: Integer ) return Integer renames Report.Ident_Int;
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        -- ^^ name chosen to allow embedding in calls
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  A_String_10 : C641001_0.String_10;
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  Slicable    : String(1..40);
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  Tag_Slices  : C641001_0.Tag_List(0..11);
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  Global_Data : String(1..26) := "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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  procedure Check_Out_Sliding( Lo1, Hi1, Lo2, Hi2 : Natural ) is
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    subtype One_Constrained_String is String(Lo1..Hi1);   -- 1  5
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    subtype Two_Constrained_String is String(Lo2..Hi2);   -- 6 10
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    procedure Out_Param( Param : out One_Constrained_String ) is
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    begin
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      Param := Report.Ident_Str( Global_Data(Lo2..Hi2) );
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    end Out_Param;
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    Object : Two_Constrained_String;
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  begin
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    Out_Param( Object );
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    if Object /= Report.Ident_Str( Global_Data(Lo2..Hi2) ) then
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      Report.Failed("Bad result in Check_Out_Sliding");
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    end if;
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  exception
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    when others => Report.Failed("Exception in Check_Out_Sliding");
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  end Check_Out_Sliding;
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  procedure Check_Dynamic_Subtype_Cases(F_Lower,F_Upper: Natural;
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                                        A_Lower,A_Upper: Natural) is
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    subtype Dyn_String is String(F_Lower..F_Upper);
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    procedure Check_Dyn_Subtype_Formal_Out( Param : out Dyn_String ) is
186
    begin
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      Param := Global_Data(11..20);
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    end Check_Dyn_Subtype_Formal_Out;
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    procedure Check_Dyn_Subtype_Formal_In( Param : in Dyn_String ) is
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    begin
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      if Param /= Global_Data(11..20) then
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        Report.Failed("Dynamic case, data mismatch");
194
      end if;
195
    end Check_Dyn_Subtype_Formal_In;
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    Stuff: String(A_Lower..A_Upper);
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199
  begin
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    Check_Dyn_Subtype_Formal_Out( Stuff );
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    Check_Dyn_Subtype_Formal_In( Stuff );
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  end Check_Dynamic_Subtype_Cases;
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begin  -- Main test procedure.
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  Report.Test ("C641001", "Check that actual parameters passed by " &
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                          "reference are view converted to the nominal " &
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                          "subtype of the formal parameter" );
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  -- non error cases for string slices
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  C641001_0.Check_String_10( A_String_10, 1, 10 );
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  TCTouch.Assert( A_String_10 = "1234567890", "Nominal case" );
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  C641001_0.Check_String_10( A_String_10, 11, 20 );
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  TCTouch.Assert( A_String_10 = "ABCDEFGHIJ", "Sliding to subtype" );
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  C641001_0.Check_String_10( Slicable(1..10), 1, 10 );
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  TCTouch.Assert( Slicable(1..10) = "1234567890", "Slice, no sliding" );
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  C641001_0.Check_String_10( Slicable(1..10), 21, 30 );
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  TCTouch.Assert( Slicable(1..10) = "KLMNOPQRST", "Sliding to slice" );
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  C641001_0.Check_String_10( Slicable(11..20), 11, 20 );
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  TCTouch.Assert( Slicable(11..20) = "ABCDEFGHIJ", "Sliding to same" );
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  C641001_0.Check_String_10( Slicable(21..30), 11, 20 );
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  TCTouch.Assert( Slicable(21..30) = "ABCDEFGHIJ", "Sliding up" );
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  -- error cases for string slices
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  C641001_0.Check_Illegal_Slice_Reference( Slicable(21..30), 20 );
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  C641001_0.Check_Illegal_Slice_Reference( Slicable(1..15), Slicable'Last );
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  -- checks for view converting actuals to formals
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  -- catch low bound fault
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  C641001_0.Check_Tag_Slice( Tag_Slices(II(0)..9) );     -- II ::= Ident_Int
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  TCTouch.Assert( Tag_Slices'First = 0, "Tag_Slices'First = 0" );
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  TCTouch.Assert( Tag_Slices'Last = 11, "Tag_Slices'Last = 11" );
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  -- catch high bound fault
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  C641001_0.Check_Tag_Slice( Tag_Slices(2..II(11)) );
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  TCTouch.Assert( Tag_Slices'First = 0, "Tag_Slices'First = 0" );
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  TCTouch.Assert( Tag_Slices'Last = 11, "Tag_Slices'Last = 11" );
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248
  Check_Formal_Association_Check:
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  begin
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    C641001_0.Check_String_10( Slicable, 1, 10 ); -- catch length fault
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    Report.Failed("Exception not raised at Check_Formal_Association_Check");
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  exception
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    when Constraint_Error =>
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      null; -- expected case
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    when others =>
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      Report.Failed("Wrong exception at Check_Formal_Association_Check");
257
  end Check_Formal_Association_Check;
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259
  -- check for constrained actual, unconstrained formal
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  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
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  Check_Out_Sliding( II(1),II(5), II(6),II(10) );
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268
  Check_Out_Sliding( 21,25, 6,10 );
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270
  Check_Dynamic_Subtype_Cases(F_Lower => II(1), F_Upper => II(10),
271
                              A_Lower => II(1), A_Upper => II(10));
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  Check_Dynamic_Subtype_Cases(F_Lower => II(21), F_Upper => II(30),
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                              A_Lower => II( 1), A_Upper => II(10));
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  Check_Dynamic_Subtype_Cases(F_Lower => II( 1), F_Upper => II(10),
277
                              A_Lower => II(21), A_Upper => II(30));
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  Report.Result;
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end C641001;

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