old-autovect-branch/gcc/testsuite/ada/acats/tests/c4/c460008.a

   1 -- C460008.A
   2 --
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  16 --                                    DISCLAIMER
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  18 --     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
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  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
  51 with Report;
  52
  53 procedure 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
 191 begin  -- 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
 286 end C460008;