1-- C460008.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 conversion to a modular type raises Constraint_Error 28-- when the operand value is outside the base range of the modular type. 29-- 30-- TEST DESCRIPTION: 31-- Test conversion from integer, float, fixed and decimal types to 32-- modular types. Test conversion to mod 255, mod 256 and mod 258 33-- to test the boundaries of 8 bit (+/-) unsigned numbers. 34-- Test operand values that are negative, the value of the mod, 35-- and greater than the value of the mod. 36-- Declare a generic test procedure and instantiate it for each of the 37-- unsigned types for each operand type. 38-- 39-- 40-- CHANGE HISTORY: 41-- 04 OCT 95 SAIC Initial version 42-- 15 MAY 96 SAIC Revised for 2.1 43-- 24 NOV 98 RLB Moved decimal cases into new test, C460011, to 44-- prevent this test from being inapplicable to 45-- implementations not supporting decimal types. 46-- 47--! 48 49------------------------------------------------------------------- C460008 50 51with Report; 52 53procedure C460008 is 54 55 Shy_By_One : constant := 2**8-1; 56 Heavy_By_Two : constant := 2**8+2; 57 58 type Unsigned_Edge_8 is mod Shy_By_One; 59 type Unsigned_8_Bit is mod 2**8; 60 type Unsigned_Over_8 is mod Heavy_By_Two; 61 62 NPC : constant String := " not properly converted"; 63 64 procedure Assert( Truth: Boolean; Message: String ) is 65 begin 66 if not Truth then 67 Report.Failed(Message); 68 end if; 69 end Assert; 70 71-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 72 73 generic 74 type Source is range <>; 75 type Target is mod <>; 76 procedure Integer_Conversion_Check( For_The_Value : Source; 77 Message : String ); 78 79 procedure Integer_Conversion_Check( For_The_Value : Source; 80 Message : String ) is 81 82 Item : Target; 83 84 begin 85 Item := Target( For_The_Value ); 86 Report.Failed("Int expected Constraint_Error " & Message); 87 -- the call to Comment is to make the otherwise dead assignment to 88 -- Item live. 89 -- To avoid invoking C_E on a call to 'Image in Report.Failed that 90 -- could cause a false pass 91 Report.Comment("Value of" & Target'Image(Item) & NPC); 92 exception 93 when Constraint_Error => null; -- expected case 94 when others => Report.Failed("Int Raised wrong exception " & Message); 95 end Integer_Conversion_Check; 96 97 procedure Int_To_Short is 98 new Integer_Conversion_Check( Integer, Unsigned_Edge_8 ); 99 100 procedure Int_To_Eight is 101 new Integer_Conversion_Check( Integer, Unsigned_8_Bit ); 102 103 procedure Int_To_Wide is 104 new Integer_Conversion_Check( Integer, Unsigned_Over_8 ); 105 106-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 107 108 generic 109 type Source is digits <>; 110 type Target is mod <>; 111 procedure Float_Conversion_Check( For_The_Value : Source; 112 Message : String ); 113 114 procedure Float_Conversion_Check( For_The_Value : Source; 115 Message : String ) is 116 117 Item : Target; 118 119 begin 120 Item := Target( For_The_Value ); 121 Report.Failed("Flt expected Constraint_Error " & Message); 122 Report.Comment("Value of" & Target'Image(Item) & NPC); 123 exception 124 when Constraint_Error => null; -- expected case 125 when others => Report.Failed("Flt raised wrong exception " & Message); 126 end Float_Conversion_Check; 127 128 procedure Float_To_Short is 129 new Float_Conversion_Check( Float, Unsigned_Edge_8 ); 130 131 procedure Float_To_Eight is 132 new Float_Conversion_Check( Float, Unsigned_8_Bit ); 133 134 procedure Float_To_Wide is 135 new Float_Conversion_Check( Float, Unsigned_Over_8 ); 136 137 function Identity( Root_Beer: Float ) return Float is 138 -- a knockoff of Report.Ident_Int for type Float 139 Nothing : constant Float := 0.0; 140 begin 141 if Report.Ident_Bool( Root_Beer = Nothing ) then 142 return Nothing; 143 else 144 return Root_Beer; 145 end if; 146 end Identity; 147 148-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 149 150 generic 151 type Source is delta <>; 152 type Target is mod <>; 153 procedure Fixed_Conversion_Check( For_The_Value : Source; 154 Message : String ); 155 156 procedure Fixed_Conversion_Check( For_The_Value : Source; 157 Message : String ) is 158 159 Item : Target; 160 161 begin 162 Item := Target( For_The_Value ); 163 Report.Failed("Fix expected Constraint_Error " & Message); 164 Report.Comment("Value of" & Target'Image(Item) & NPC); 165 exception 166 when Constraint_Error => null; -- expected case 167 when others => Report.Failed("Fix raised wrong exception " & Message); 168 end Fixed_Conversion_Check; 169 170 procedure Fixed_To_Short is 171 new Fixed_Conversion_Check( Duration, Unsigned_Edge_8 ); 172 173 procedure Fixed_To_Eight is 174 new Fixed_Conversion_Check( Duration, Unsigned_8_Bit ); 175 176 procedure Fixed_To_Wide is 177 new Fixed_Conversion_Check( Duration, Unsigned_Over_8 ); 178 179 function Identity( A_Stitch: Duration ) return Duration is 180 Threadbare : constant Duration := 0.0; 181 begin 182 if Report.Ident_Bool( A_Stitch = Threadbare ) then 183 return Threadbare; 184 else 185 return A_Stitch; 186 end if; 187 end Identity; 188 189-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 190 191begin -- Main test procedure. 192 193 Report.Test ("C460008", "Check that conversion to " & 194 "a modular type raises Constraint_Error when " & 195 "the operand value is outside the base range " & 196 "of the modular type" ); 197 198 199 -- Integer Error cases 200 201 Int_To_Short( Report.Ident_Int( -1 ), "I2S Dynamic, Negative" ); 202 Int_To_Short( Report.Ident_Int( Shy_By_One ), "I2S Dynamic, At_Mod" ); 203 Int_To_Short( Report.Ident_Int( Heavy_By_Two+1 ), "I2S Dynamic, Over_Mod" ); 204 205 Int_To_Eight( -Shy_By_One, "I28 Static, Negative" ); 206 Int_To_Eight( 2**8, "I28 Static, At_Mod" ); 207 Int_To_Eight( Heavy_By_Two+1, "I28 Static, Over_Mod" ); 208 209 Int_To_Wide ( Report.Ident_Int( -(Heavy_By_Two*2) ), 210 "I2W Dynamic, Negative" ); 211 Int_To_Wide ( Heavy_By_Two, "I2W Static, At_Mod" ); 212 Int_To_Wide ( Report.Ident_Int( Heavy_By_Two*2 ), "I2W Dynamic, Over_Mod" ); 213 214 -- Float Error cases 215 216 Float_To_Short( -13.31, "F2S Static, Negative" ); 217 Float_To_Short( Identity ( Float(Shy_By_One)), "F2S Dynamic, At_Mod" ); 218 Float_To_Short( 6378.388, "F2S Static, Over_Mod" ); 219 220 Float_To_Eight( Identity( -99.3574 ), "F28 Dynamic, Negative" ); 221 Float_To_Eight( 2.0**8, "F28 Static, At_Mod" ); 222 Float_To_Eight( 2.0**9, "F28 Static, Over_Mod" ); 223 224 Float_To_Wide ( -0.54953_93129_81644, "FTW Static, Negative" ); 225 Float_To_Wide ( Identity( 2.0**8 +2.0 ), "FTW Dynamic, At_Mod" ); 226 Float_To_Wide ( Identity( 2.0**8 +2.5001 ), "FTW Dynamic, Over_Mod" ); 227 Float_To_Wide ( Identity( Float'Last ), "FTW Dynamic, Over_Mod" ); 228 229 -- Fixed Error cases 230 231 Fixed_To_Short( Identity( -5.00 ), "D2S Dynamic, Negative" ); 232 Fixed_To_Short( Shy_By_One * 1.0, "D2S Static, At_Mod" ); 233 Fixed_To_Short( 1995.9, "D2S Static, Over_Mod" ); 234 235 Fixed_To_Eight( -0.5, "D28 Static, Negative" ); 236 Fixed_To_Eight( 2.0*128, "D28 Static, At_Mod" ); 237 Fixed_To_Eight( Identity( 2001.2 ), "D28 Dynamic, Over_Mod" ); 238 239 Fixed_To_Wide ( Duration'First, "D2W Static, Negative" ); 240 Fixed_To_Wide ( Identity( 2*128.0 +2.0 ), "D2W Dynamic, At_Mod" ); 241 Fixed_To_Wide ( Duration'Last, "D2W Static, Over_Mod" ); 242 243 -- having made it this far, the rest is downhill... 244 -- check a few, correct, edge cases, and we're done 245 246 Eye_Dew: declare 247 A_Float : Float := 0.0; 248 Your_Time : Duration := 0.0; 249 Number : Integer := 0; 250 251 Little : Unsigned_Edge_8; 252 Moderate : Unsigned_8_Bit; 253 Big : Unsigned_Over_8; 254 255 begin 256 Little := Unsigned_Edge_8(A_Float); 257 Assert( Little = 0, "Float => Little, 0"); 258 259 260 Moderate := Unsigned_8_Bit (Your_Time); 261 Assert( Moderate = 0, "Your_Time => Moderate, 0"); 262 263 Big := Unsigned_Over_8 (Number); 264 Assert( Big = 0, "Number => Big, 0"); 265 266 A_Float := 2.0**8-2.0; 267 Your_Time := 2.0*128-2.0; 268 Number := 2**8; 269 270 Little := Unsigned_Edge_8(A_Float); 271 Assert( Little = 254, "Float => Little, 254"); 272 273 Little := Unsigned_Edge_8(Your_Time); 274 Assert( Little = 254, "Your_Time => Little, 254"); 275 276 Big := Unsigned_Over_8 (A_Float + 2.0); 277 Assert( Big = 256, "Sense => Big, 256"); 278 279 Big := Unsigned_Over_8 (Number); 280 Assert( Big = 256, "Number => Big, 256"); 281 282 end Eye_Dew; 283 284 Report.Result; 285 286end C460008; 287