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-- C641001.A

--

--                             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.

--*

--

-- OBJECTIVE:

--      Check that actual parameters passed by reference are view converted

--      to the nominal subtype of the formal parameter.

--

-- TEST DESCRIPTION:

--      Check that sliding is allowed for formal parameters, especially

--      check cases that would have caused errors in Ada'83.

--      Check that length check for a formal parameter (esp out mode)

--      is performed before the call, not after.

--

--  notes: 6.2; by reference ::= tagged, task, protected,

--                       limited (nonprivate), or composite containing such

--         4.6; view conversion

--

--

-- CHANGE HISTORY:

--      26 JAN 96   SAIC   Initial version

--      04 NOV 96   SAIC   Commentary revision for release 2.1

--      27 FEB 97   PWB.CTA Corrected reference to the wrong string

--!

----------------------------------------------------------------- C641001_0

package C641001_0 is

  subtype String_10 is String(1..10);

  procedure Check_String_10( S : out String_10; Start, Stop: Natural );

  procedure Check_Illegal_Slice_Reference( Slice_Passed : in out String;

                                           Index: Natural );

  type Tagged_Data(Bound: Natural) is tagged record

    Data_Item : String(1..Bound) := (others => '*');

  end record;

  type Tag_List is array(Natural range <>) of Tagged_Data(5);

  subtype Tag_List_10 is Tag_List(1..10);

  procedure Check_Tag_Slice( TL : in out Tag_List_10 );

  procedure Check_Out_Tagged_Data( Formal : out Tagged_Data );

end C641001_0;

-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

with Report;

with TCTouch;

package body C641001_0 is

  String_Data : constant String := "1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZ";

  procedure Check_String_10( S : out String_10; Start, Stop: Natural ) is

  begin

    if S'Length /= 10 then

      Report.Failed("Length check not performed prior to execution");

    end if;

    S := String_Data(Start..Stop);

  exception

    when others => Report.Failed("Exception encountered in Check_String_10");

  end Check_String_10;

  procedure Check_Illegal_Slice_Reference( Slice_Passed : in out String;

                                           Index: Natural ) is

  begin

    -- essentially "do-nothing" for optimization foilage...

    if Slice_Passed(Index) in Character then

    -- Intent is    ^^^^^  should raise Constraint_Error

      Report.Failed("Illegal Slice provided legal character");

    else

      Report.Failed("Illegal Slice provided illegal character");

    end if;

  exception

    when Constraint_Error =>

      null; -- expected case

    when others =>

      Report.Failed("Wrong exception in Check_Illegal_Slice_Reference");

  end Check_Illegal_Slice_Reference;

  procedure Check_Tag_Slice( TL : in out Tag_List_10 ) is

    -- if the view conversion is not performed, one of the following checks

    -- will fail (given data passed as 0..9 and then 2..11)

  begin

    Check_Under_Index:  -- index 0 should raise C_E

    begin

      TCTouch.Assert( TL(Report.Ident_Int(0)).Data_Item = "*****",

                      "Index 0 (illegal); bad data" );

      Report.Failed("Index 0 did not raise Constraint_Error");

    exception

      when Constraint_Error =>

        null; -- expected case

      when others =>

        Report.Failed("Wrong exception in Check_Under_Index ");

    end Check_Under_Index;

    Check_Over_Index:  -- index 11 should raise C_E

    begin

      TCTouch.Assert( TL(Report.Ident_Int(11)).Data_Item = "*****",

                      "Index 11 (illegal); bad data" );

      Report.Failed("Index 11 did not raise Constraint_Error");

    exception

      when Constraint_Error =>

        null; -- expected case

      when others =>

        Report.Failed("Wrong exception in Check_Over_Index ");

    end Check_Over_Index;

  end Check_Tag_Slice;

  procedure Check_Out_Tagged_Data( Formal : out Tagged_Data ) is

  begin

    TCTouch.Assert( Formal.Data_Item = "*****", "out formal data bad" );

    Formal.Data_Item(1) := '!';

  end Check_Out_Tagged_Data;

end C641001_0;

------------------------------------------------------------------- C641001

with Report;

with TCTouch;

with C641001_0;

procedure C641001 is

  function II( I: Integer ) return Integer renames Report.Ident_Int;

        -- ^^ name chosen to allow embedding in calls

  A_String_10 : C641001_0.String_10;

  Slicable    : String(1..40);

  Tag_Slices  : C641001_0.Tag_List(0..11);

  Global_Data : String(1..26) := "ABCDEFGHIJKLMNOPQRSTUVWXYZ";

  procedure Check_Out_Sliding( Lo1, Hi1, Lo2, Hi2 : Natural ) is

    subtype One_Constrained_String is String(Lo1..Hi1);   -- 1  5

    subtype Two_Constrained_String is String(Lo2..Hi2);   -- 6 10

    procedure Out_Param( Param : out One_Constrained_String ) is

    begin

      Param := Report.Ident_Str( Global_Data(Lo2..Hi2) );

    end Out_Param;

    Object : Two_Constrained_String;

  begin

    Out_Param( Object );

    if Object /= Report.Ident_Str( Global_Data(Lo2..Hi2) ) then

      Report.Failed("Bad result in Check_Out_Sliding");

    end if;

  exception

    when others => Report.Failed("Exception in Check_Out_Sliding");

  end Check_Out_Sliding;

  procedure Check_Dynamic_Subtype_Cases(F_Lower,F_Upper: Natural;

                                        A_Lower,A_Upper: Natural) is

    subtype Dyn_String is String(F_Lower..F_Upper);

    procedure Check_Dyn_Subtype_Formal_Out( Param : out Dyn_String ) is

    begin

      Param := Global_Data(11..20);

    end Check_Dyn_Subtype_Formal_Out;

    procedure Check_Dyn_Subtype_Formal_In( Param : in Dyn_String ) is

    begin

      if Param /= Global_Data(11..20) then

        Report.Failed("Dynamic case, data mismatch");

      end if;

    end Check_Dyn_Subtype_Formal_In;

    Stuff: String(A_Lower..A_Upper);

  begin

    Check_Dyn_Subtype_Formal_Out( Stuff );

    Check_Dyn_Subtype_Formal_In( Stuff );

  end Check_Dynamic_Subtype_Cases;

begin  -- Main test procedure.

  Report.Test ("C641001", "Check that actual parameters passed by " &

                          "reference are view converted to the nominal " &

                          "subtype of the formal parameter" );

  -- non error cases for string slices

  C641001_0.Check_String_10( A_String_10, 1, 10 );

  TCTouch.Assert( A_String_10 = "1234567890", "Nominal case" );

  C641001_0.Check_String_10( A_String_10, 11, 20 );

  TCTouch.Assert( A_String_10 = "ABCDEFGHIJ", "Sliding to subtype" );

  C641001_0.Check_String_10( Slicable(1..10), 1, 10 );

  TCTouch.Assert( Slicable(1..10) = "1234567890", "Slice, no sliding" );

  C641001_0.Check_String_10( Slicable(1..10), 21, 30 );

  TCTouch.Assert( Slicable(1..10) = "KLMNOPQRST", "Sliding to slice" );

  C641001_0.Check_String_10( Slicable(11..20), 11, 20 );

  TCTouch.Assert( Slicable(11..20) = "ABCDEFGHIJ", "Sliding to same" );

  C641001_0.Check_String_10( Slicable(21..30), 11, 20 );

  TCTouch.Assert( Slicable(21..30) = "ABCDEFGHIJ", "Sliding up" );

  -- error cases for string slices

  C641001_0.Check_Illegal_Slice_Reference( Slicable(21..30), 20 );

  C641001_0.Check_Illegal_Slice_Reference( Slicable(1..15), Slicable'Last );

  -- checks for view converting actuals to formals

  -- catch low bound fault

  C641001_0.Check_Tag_Slice( Tag_Slices(II(0)..9) );     -- II ::= Ident_Int

  TCTouch.Assert( Tag_Slices'First = 0, "Tag_Slices'First = 0" );

  TCTouch.Assert( Tag_Slices'Last = 11, "Tag_Slices'Last = 11" );

  -- catch high bound fault

  C641001_0.Check_Tag_Slice( Tag_Slices(2..II(11)) );

  TCTouch.Assert( Tag_Slices'First = 0, "Tag_Slices'First = 0" );

  TCTouch.Assert( Tag_Slices'Last = 11, "Tag_Slices'Last = 11" );

  Check_Formal_Association_Check:

  begin

    C641001_0.Check_String_10( Slicable, 1, 10 ); -- catch length fault

    Report.Failed("Exception not raised at Check_Formal_Association_Check");

  exception

    when Constraint_Error =>

      null; -- expected case

    when others =>

      Report.Failed("Wrong exception at Check_Formal_Association_Check");

  end Check_Formal_Association_Check;

  -- check for constrained actual, unconstrained formal

  C641001_0.Check_Out_Tagged_Data( Tag_Slices(5) );

  TCTouch.Assert( Tag_Slices(5).Data_Item = "!****",

                  "formal out returned bad result" );

  -- additional checks for out mode formal parameters, dynamic subtypes

  Check_Out_Sliding( II(1),II(5), II(6),II(10) );

  Check_Out_Sliding( 21,25, 6,10 );

  Check_Dynamic_Subtype_Cases(F_Lower => II(1), F_Upper => II(10),

                              A_Lower => II(1), A_Upper => II(10));

  Check_Dynamic_Subtype_Cases(F_Lower => II(21), F_Upper => II(30),

                              A_Lower => II( 1), A_Upper => II(10));

  Check_Dynamic_Subtype_Cases(F_Lower => II( 1), F_Upper => II(10),

                              A_Lower => II(21), A_Upper => II(30));

  Report.Result;

end C641001;