-- C460008.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 conversion to a modular type raises Constraint_Error -- when the operand value is outside the base range of the modular type. -- -- TEST DESCRIPTION: -- Test conversion from integer, float, fixed and decimal types to -- modular types. Test conversion to mod 255, mod 256 and mod 258 -- to test the boundaries of 8 bit (+/-) unsigned numbers. -- Test operand values that are negative, the value of the mod, -- and greater than the value of the mod. -- Declare a generic test procedure and instantiate it for each of the -- unsigned types for each operand type. -- -- -- CHANGE HISTORY: -- 04 OCT 95 SAIC Initial version -- 15 MAY 96 SAIC Revised for 2.1 -- 24 NOV 98 RLB Moved decimal cases into new test, C460011, to -- prevent this test from being inapplicable to -- implementations not supporting decimal types. -- --! ------------------------------------------------------------------- C460008 with Report; procedure C460008 is Shy_By_One : constant := 2**8-1; Heavy_By_Two : constant := 2**8+2; type Unsigned_Edge_8 is mod Shy_By_One; type Unsigned_8_Bit is mod 2**8; type Unsigned_Over_8 is mod Heavy_By_Two; NPC : constant String := " not properly converted"; procedure Assert( Truth: Boolean; Message: String ) is begin if not Truth then Report.Failed(Message); end if; end Assert; -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- generic type Source is range <>; type Target is mod <>; procedure Integer_Conversion_Check( For_The_Value : Source; Message : String ); procedure Integer_Conversion_Check( For_The_Value : Source; Message : String ) is Item : Target; begin Item := Target( For_The_Value ); Report.Failed("Int expected Constraint_Error " & Message); -- the call to Comment is to make the otherwise dead assignment to -- Item live. -- To avoid invoking C_E on a call to 'Image in Report.Failed that -- could cause a false pass Report.Comment("Value of" & Target'Image(Item) & NPC); exception when Constraint_Error => null; -- expected case when others => Report.Failed("Int Raised wrong exception " & Message); end Integer_Conversion_Check; procedure Int_To_Short is new Integer_Conversion_Check( Integer, Unsigned_Edge_8 ); procedure Int_To_Eight is new Integer_Conversion_Check( Integer, Unsigned_8_Bit ); procedure Int_To_Wide is new Integer_Conversion_Check( Integer, Unsigned_Over_8 ); -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- generic type Source is digits <>; type Target is mod <>; procedure Float_Conversion_Check( For_The_Value : Source; Message : String ); procedure Float_Conversion_Check( For_The_Value : Source; Message : String ) is Item : Target; begin Item := Target( For_The_Value ); Report.Failed("Flt expected Constraint_Error " & Message); Report.Comment("Value of" & Target'Image(Item) & NPC); exception when Constraint_Error => null; -- expected case when others => Report.Failed("Flt raised wrong exception " & Message); end Float_Conversion_Check; procedure Float_To_Short is new Float_Conversion_Check( Float, Unsigned_Edge_8 ); procedure Float_To_Eight is new Float_Conversion_Check( Float, Unsigned_8_Bit ); procedure Float_To_Wide is new Float_Conversion_Check( Float, Unsigned_Over_8 ); function Identity( Root_Beer: Float ) return Float is -- a knockoff of Report.Ident_Int for type Float Nothing : constant Float := 0.0; begin if Report.Ident_Bool( Root_Beer = Nothing ) then return Nothing; else return Root_Beer; end if; end Identity; -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- generic type Source is delta <>; type Target is mod <>; procedure Fixed_Conversion_Check( For_The_Value : Source; Message : String ); procedure Fixed_Conversion_Check( For_The_Value : Source; Message : String ) is Item : Target; begin Item := Target( For_The_Value ); Report.Failed("Fix expected Constraint_Error " & Message); Report.Comment("Value of" & Target'Image(Item) & NPC); exception when Constraint_Error => null; -- expected case when others => Report.Failed("Fix raised wrong exception " & Message); end Fixed_Conversion_Check; procedure Fixed_To_Short is new Fixed_Conversion_Check( Duration, Unsigned_Edge_8 ); procedure Fixed_To_Eight is new Fixed_Conversion_Check( Duration, Unsigned_8_Bit ); procedure Fixed_To_Wide is new Fixed_Conversion_Check( Duration, Unsigned_Over_8 ); function Identity( A_Stitch: Duration ) return Duration is Threadbare : constant Duration := 0.0; begin if Report.Ident_Bool( A_Stitch = Threadbare ) then return Threadbare; else return A_Stitch; end if; end Identity; -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- begin -- Main test procedure. Report.Test ("C460008", "Check that conversion to " & "a modular type raises Constraint_Error when " & "the operand value is outside the base range " & "of the modular type" ); -- Integer Error cases Int_To_Short( Report.Ident_Int( -1 ), "I2S Dynamic, Negative" ); Int_To_Short( Report.Ident_Int( Shy_By_One ), "I2S Dynamic, At_Mod" ); Int_To_Short( Report.Ident_Int( Heavy_By_Two+1 ), "I2S Dynamic, Over_Mod" ); Int_To_Eight( -Shy_By_One, "I28 Static, Negative" ); Int_To_Eight( 2**8, "I28 Static, At_Mod" ); Int_To_Eight( Heavy_By_Two+1, "I28 Static, Over_Mod" ); Int_To_Wide ( Report.Ident_Int( -(Heavy_By_Two*2) ), "I2W Dynamic, Negative" ); Int_To_Wide ( Heavy_By_Two, "I2W Static, At_Mod" ); Int_To_Wide ( Report.Ident_Int( Heavy_By_Two*2 ), "I2W Dynamic, Over_Mod" ); -- Float Error cases Float_To_Short( -13.31, "F2S Static, Negative" ); Float_To_Short( Identity ( Float(Shy_By_One)), "F2S Dynamic, At_Mod" ); Float_To_Short( 6378.388, "F2S Static, Over_Mod" ); Float_To_Eight( Identity( -99.3574 ), "F28 Dynamic, Negative" ); Float_To_Eight( 2.0**8, "F28 Static, At_Mod" ); Float_To_Eight( 2.0**9, "F28 Static, Over_Mod" ); Float_To_Wide ( -0.54953_93129_81644, "FTW Static, Negative" ); Float_To_Wide ( Identity( 2.0**8 +2.0 ), "FTW Dynamic, At_Mod" ); Float_To_Wide ( Identity( 2.0**8 +2.5001 ), "FTW Dynamic, Over_Mod" ); Float_To_Wide ( Identity( Float'Last ), "FTW Dynamic, Over_Mod" ); -- Fixed Error cases Fixed_To_Short( Identity( -5.00 ), "D2S Dynamic, Negative" ); Fixed_To_Short( Shy_By_One * 1.0, "D2S Static, At_Mod" ); Fixed_To_Short( 1995.9, "D2S Static, Over_Mod" ); Fixed_To_Eight( -0.5, "D28 Static, Negative" ); Fixed_To_Eight( 2.0*128, "D28 Static, At_Mod" ); Fixed_To_Eight( Identity( 2001.2 ), "D28 Dynamic, Over_Mod" ); Fixed_To_Wide ( Duration'First, "D2W Static, Negative" ); Fixed_To_Wide ( Identity( 2*128.0 +2.0 ), "D2W Dynamic, At_Mod" ); Fixed_To_Wide ( Duration'Last, "D2W Static, Over_Mod" ); -- having made it this far, the rest is downhill... -- check a few, correct, edge cases, and we're done Eye_Dew: declare A_Float : Float := 0.0; Your_Time : Duration := 0.0; Number : Integer := 0; Little : Unsigned_Edge_8; Moderate : Unsigned_8_Bit; Big : Unsigned_Over_8; begin Little := Unsigned_Edge_8(A_Float); Assert( Little = 0, "Float => Little, 0"); Moderate := Unsigned_8_Bit (Your_Time); Assert( Moderate = 0, "Your_Time => Moderate, 0"); Big := Unsigned_Over_8 (Number); Assert( Big = 0, "Number => Big, 0"); A_Float := 2.0**8-2.0; Your_Time := 2.0*128-2.0; Number := 2**8; Little := Unsigned_Edge_8(A_Float); Assert( Little = 254, "Float => Little, 254"); Little := Unsigned_Edge_8(Your_Time); Assert( Little = 254, "Your_Time => Little, 254"); Big := Unsigned_Over_8 (A_Float + 2.0); Assert( Big = 256, "Sense => Big, 256"); Big := Unsigned_Over_8 (Number); Assert( Big = 256, "Number => Big, 256"); end Eye_Dew; Report.Result; end C460008;