1-- CD33002.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 Component_Sizes that are multiples of the word
28--      size are supported.
29--
30--      Check that for such Component_Sizes arrays contain no gaps between
31--      components.
32--
33-- TEST DESCRIPTION:
34--      This test defines three array types and specifies their layouts
35--      using representation specifications for the 'Component_Size and
36--      pragma Packs for each.  It then checks that the implied assumptions
37--      about the resulting layout actually can be made.
38--
39-- APPLICABILITY CRITERIA:
40--      All implementations must attempt to compile this test.
41--
42--      For implementations validating against Systems Programming Annex (C):
43--        this test must execute and report PASSED.
44--
45--      For implementations not validating against Annex C:
46--        this test may report compile time errors at one or more points
47--        indicated by "-- ANX-C RQMT", in which case it may be graded as inapplicable.
48--        Otherwise, the test must execute and report PASSED.
49--
50--
51-- CHANGE HISTORY:
52--      22 JUL 95   SAIC   Initial version
53--      07 MAY 96   SAIC   Revised for 2.1
54--      24 AUG 96   SAIC   Additional 2.1 revisions
55--      16 FEB 98   EDS    Modify documentation.
56--!
57
58----------------------------------------------------------------- CD33002_0
59
60with System;
61package CD33002_0 is
62
63  S_Units_per_Word : constant := System.Word_Size/System.Storage_Unit;
64
65  type Nibble is mod 2**4;
66
67  type Byte is mod 2**8;
68
69  type Word_Stuff is array(Natural range <>) of Byte;
70    for Word_Stuff'Component_Size
71      use System.Word_Size;                                   -- ANX-C RQMT.
72      pragma Pack(Word_Stuff);                                -- ANX-C RQMT.
73
74  type Double_Stuff is array(Natural range <>) of Byte;
75    for Double_Stuff'Component_Size
76      use System.Word_Size * 2;     -- multiple               -- ANX-C RQMT.
77
78  type Address_Calculator is record
79    Item_1 : Nibble;
80    Item_2 : Nibble;
81  end record;
82
83  for Address_Calculator use record
84    Item_1 at 0 range 0..3;
85    Item_2 at 1 range 0..3;
86  end record;
87
88  -- by definition (13.5.2(2)) abs(Item_2'Address - Item_1'Address) = 1
89  -- it therefore follows that:
90  --     Address_Calculator'Size = 2 * Addressable_Unit'Size
91
92end CD33002_0;
93
94-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
95
96-- there is no package body CD33002_0
97
98------------------------------------------------------------------- CD33002
99
100with Report;
101with TCTouch;
102with System.Storage_Elements;
103with CD33002_0;
104procedure CD33002 is
105
106  use type System.Storage_Elements.Storage_Offset;
107
108  A_Word   : CD33002_0.Word_Stuff(0..15);
109
110  A_Double : CD33002_0.Double_Stuff(0..15);
111
112  procedure Unexpected( Message : String; Wanted, Got: Integer ) is
113  begin
114    Report.Failed ( Message & " Wanted:"
115                    & Integer'Image(Wanted) & " Got:" & Integer'Image(Got) );
116  end Unexpected;
117
118begin  -- Main test procedure.
119
120  Report.Test ("CD33002", "Check that Component_Sizes that are multiples "
121                        & "of the word size are supported. Check that for "
122                        & "such Component_Sizes arrays contain no gaps "
123                        & "between components" );
124
125  if A_Word'Size /= CD33002_0.Word_Stuff'Component_Size * 16 then
126    Unexpected("Word Size",
127                CD33002_0.Word_Stuff'Component_Size * 16,
128                A_Word'Size );
129  end if;
130
131  if A_Double'Size /= CD33002_0.Double_Stuff'Component_Size * 16 then
132    Unexpected("Double word Size",
133                CD33002_0.Double_Stuff'Component_Size * 16,
134                A_Double'Size );
135  end if;
136
137
138  Report.Result;
139
140end CD33002;
141