1-- CD90001.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 Unchecked_Conversion is supported and is reversible in 28-- the cases where: 29-- Source'Size = Target'Size 30-- Source'Alignment = Target'Alignment 31-- Source and Target are both represented contiguously 32-- Bit pattern in Source is a meaningful value of Target type 33-- 34-- TEST DESCRIPTION: 35-- This test declares an enumeration type with a representation 36-- specification that should fit neatly into an 8 bit object; and a 37-- modular type that should also be able to fit easily into 8 bits; 38-- uses size representation clauses on both of them for 8 bit 39-- representations. It then defines two instances of 40-- Unchecked_Conversion; to convert both ways between the types. 41-- Using several distinctive values, it checks that the conversions 42-- are performed, and reversible. 43-- As a second case, the above is performed with an integer type and 44-- a packed array of booleans. 45-- 46-- APPLICABILITY CRITERIA: 47-- All implementations must attempt to compile this test. 48-- 49-- For implementations validating against Systems Programming Annex (C): 50-- this test must execute and report PASSED. 51-- 52-- For implementations not validating against Annex C: 53-- this test may report compile time errors at one or more points 54-- indicated by "-- ANX-C RQMT", in which case it may be graded as inapplicable. 55-- Otherwise, the test must execute and report PASSED. 56-- 57-- 58-- CHANGE HISTORY: 59-- 22 JUL 95 SAIC Initial version 60-- 07 MAY 96 SAIC Changed Boolean to Character for 2.1 61-- 27 JUL 96 SAIC Allowed for partial N/A to be PASS 62-- 14 FEB 97 PWB.CTA Corrected "=" to "/=" in alignment check. 63-- 16 FEB 98 EDS Modified documentation. 64--! 65 66----------------------------------------------------------------- CD90001_0 67 68with Report; 69with Unchecked_Conversion; 70package CD90001_0 is 71 72 -- Case 1 : Modular <=> Enumeration 73 74 type Eight_Bits is mod 2**8; 75 for Eight_Bits'Size use 8; 76 77 type User_Enums is ( One, Two, Four, Eight, 78 Sixteen, Thirty_Two, Sixty_Four, One_Twenty_Eight ); 79 for User_Enums'Size use 8; 80 81 for User_Enums use 82 ( One => 1, -- ANX-C RQMT. 83 Two => 2, -- ANX-C RQMT. 84 Four => 4, -- ANX-C RQMT. 85 Eight => 8, -- ANX-C RQMT. 86 Sixteen => 16, -- ANX-C RQMT. 87 Thirty_Two => 32, -- ANX-C RQMT. 88 Sixty_Four => 64, -- ANX-C RQMT. 89 One_Twenty_Eight => 128 ); -- ANX-C RQMT. 90 91 function EB_2_UE is new Unchecked_Conversion( Eight_Bits, User_Enums ); 92 93 function UE_2_EB is new Unchecked_Conversion( User_Enums, Eight_Bits ); 94 95 procedure TC_Check_Case_1; 96 97 -- Case 2 : Integer <=> Packed Character array 98 99 type Signed_16 is range -2**15+1 .. 2**15-1; 100 -- +1, -1 allows for both 1's and 2's comp 101 102 type Bits_16 is array(0..1) of Character; 103 pragma Pack(Bits_16); -- ANX-C RQMT. 104 105 function S16_2_B16 is new Unchecked_Conversion( Signed_16, Bits_16 ); 106 107 function B16_2_S16 is new Unchecked_Conversion( Bits_16, Signed_16 ); 108 109 procedure TC_Check_Case_2; 110 111end CD90001_0; 112 113-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 114 115with Report; 116package body CD90001_0 is 117 118 Check_List : constant array(1..8) of Eight_Bits 119 := ( 1, 2, 4, 8, 16, 32, 64, 128 ); 120 121 Check_Enum : constant array(1..8) of User_Enums 122 := ( One, Two, Four, Eight, 123 Sixteen, Thirty_Two, Sixty_Four, One_Twenty_Eight ); 124 125 procedure TC_Check_Case_1 is 126 Mod_Value : Eight_Bits; 127 Enum_Val : User_Enums; 128 begin 129 for I in Check_List'Range loop 130 131 if EB_2_UE(Check_List(I)) /= Check_Enum(I) then 132 Report.Failed("EB => UE conversion failed"); 133 end if; 134 135 if Check_List(I) /= UE_2_EB(Check_Enum(I)) then 136 Report.Failed ("EU => EB conversion failed"); 137 end if; 138 139 end loop; 140 end TC_Check_Case_1; 141 142 procedure TC_Check_Case_2 is 143 S: Signed_16; 144 T,U: Signed_16; 145 B: Bits_16; 146 C,D: Bits_16; -- allow for byte swapping 147 begin 148 --FDEC_BA98_7654_3210 149 S := 2#0011_0000_0111_0111#; 150 B := S16_2_B16( S ); 151 C := ( Character'Val(2#0011_0000#), Character'Val(2#0111_0111#) ); 152 D := ( Character'Val(2#0111_0111#), Character'Val(2#0011_0000#) ); 153 154 if (B /= C) and (B /= D) then 155 Report.Failed("Int => Chararray conversion failed"); 156 end if; 157 158 B := ( Character'Val(2#0011_1100#), Character'Val(2#0101_0101#) ); 159 S := B16_2_S16( B ); 160 T := 2#0011_1100_0101_0101#; 161 U := 2#0101_0101_0011_1100#; 162 163 if (S /= T) and (S /= U) then 164 Report.Failed("Chararray => Int conversion failed"); 165 end if; 166 167 end TC_Check_Case_2; 168 169end CD90001_0; 170 171------------------------------------------------------------------- CD90001 172 173with Report; 174with CD90001_0; 175 176procedure CD90001 is 177 178 Eight_NA : Boolean := False; 179 Sixteen_NA : Boolean := False; 180 181begin -- Main test procedure. 182 183 Report.Test ("CD90001", "Check that Unchecked_Conversion is supported " & 184 "and is reversible in appropriate cases" ); 185 Eight_Bit_Case: 186 begin 187 if CD90001_0.User_Enums'Size /= CD90001_0.Eight_Bits'Size then 188 Report.Comment("The sizes of the 8 bit types used in this test " 189 & "do not match" ); 190 Eight_NA := True; 191 elsif CD90001_0.User_Enums'Alignment /= CD90001_0.Eight_Bits'Alignment then 192 Report.Comment("The alignments of the 8 bit types used in this " 193 & "test do not match" ); 194 Eight_NA := True; 195 else 196 CD90001_0.TC_Check_Case_1; 197 end if; 198 199 exception 200 when Constraint_Error => 201 Report.Failed("Constraint_Error raised in 8 bit case"); 202 when others => 203 Report.Failed("Unexpected exception raised in 8 bit case"); 204 end Eight_Bit_Case; 205 206 Sixteen_Bit_Case: 207 begin 208 if CD90001_0.Signed_16'Size /= CD90001_0.Bits_16'Size then 209 Report.Comment("The sizes of the 16 bit types used in this test " 210 & "do not match" ); 211 Sixteen_NA := True; 212 elsif CD90001_0.Signed_16'Alignment = CD90001_0.Bits_16'Alignment then 213 Report.Comment("The alignments of the 16 bit types used in this " 214 & "test do not match" ); 215 Sixteen_NA := True; 216 else 217 CD90001_0.TC_Check_Case_2; 218 end if; 219 220 exception 221 when Constraint_Error => 222 Report.Failed("Constraint_Error raised in 16 bit case"); 223 when others => 224 Report.Failed("Unexpected exception raised in 16 bit case"); 225 end Sixteen_Bit_Case; 226 227 if Eight_NA and Sixteen_NA then 228 Report.Not_Applicable("No cases in this test apply"); 229 end if; 230 231 Report.Result; 232 233end CD90001; 234