| -- C460011.A |
| -- |
| -- Grant of Unlimited Rights |
| -- |
| -- Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687 and |
| -- F08630-91-C-0015, 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 of a decimal type to a modular type raises |
| -- Constraint_Error when the operand value is outside the base range |
| -- of the modular type. |
| -- Check that a conversion of a decimal type to an integer type |
| -- rounds correctly. |
| -- |
| -- TEST DESCRIPTION: |
| -- Test conversion from 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. |
| -- Check that the the operand is properly rounded during the conversion. |
| -- |
| -- APPLICABILITY CRITERIA: |
| -- This test is applicable to all implementations which support |
| -- decimal types. |
| -- |
| -- CHANGE HISTORY: |
| -- 24 NOV 98 RLB Split decimal cases from C460008 into this |
| -- test, added conversions to integer types. |
| -- 18 JAN 99 RLB Repaired errors in test. |
| -- |
| --! |
| |
| ------------------------------------------------------------------- C460011 |
| |
| with Report; |
| |
| procedure C460011 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; |
| |
| type Signed_8_Bit is range -128 .. 127; |
| type Signed_Over_8 is range -200 .. 200; |
| |
| 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; |
| |
| -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- |
| |
| type Decim is delta 0.1 digits 5; -- N/A => ERROR. |
| |
| generic |
| type Source is delta <> digits <>; |
| type Target is mod <>; |
| procedure Decimal_Conversion_Check( For_The_Value : Source; |
| Message : String ); |
| |
| procedure Decimal_Conversion_Check( For_The_Value : Source; |
| Message : String ) is |
| |
| Item : Target; |
| |
| begin |
| Item := Target( For_The_Value ); |
| Report.Failed("Deci expected Constraint_Error " & Message); |
| Report.Comment("Value of" & Target'Image(Item) & NPC); |
| exception |
| when Constraint_Error => null; -- expected case |
| when others => Report.Failed("Deci raised wrong exception " & Message); |
| end Decimal_Conversion_Check; |
| |
| procedure Decim_To_Short is |
| new Decimal_Conversion_Check( Decim, Unsigned_Edge_8 ); |
| |
| procedure Decim_To_Eight is |
| new Decimal_Conversion_Check( Decim, Unsigned_8_Bit ); |
| |
| procedure Decim_To_Wide is |
| new Decimal_Conversion_Check( Decim, Unsigned_Over_8 ); |
| |
| function Identity( Launder: Decim ) return Decim is |
| Flat_Broke : constant Decim := 0.0; |
| begin |
| if Report.Ident_Bool( Launder = Flat_Broke ) then |
| return Flat_Broke; |
| else |
| return Launder; |
| end if; |
| end Identity; |
| |
| -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- |
| |
| begin -- Main test procedure. |
| |
| Report.Test ("C460011", "Check that conversion to " & |
| "a modular type raises Constraint_Error when " & |
| "the operand value is outside the base range " & |
| "of the modular type" ); |
| |
| -- Decimal Error cases |
| |
| Decim_To_Short( Identity( -5.00 ), "M2S Dynamic, Negative" ); |
| Decim_To_Short( Shy_By_One * 1.0, "M2S Static, At_Mod" ); |
| Decim_To_Short( 1995.9, "M2S Static, Over_Mod" ); |
| |
| Decim_To_Eight( -0.5, "M28 Static, Negative" ); |
| Decim_To_Eight( 2.0*128, "M28 Static, At_Mod" ); |
| Decim_To_Eight( Identity( 2001.2 ), "M28 Dynamic, Over_Mod" ); |
| |
| Decim_To_Wide ( Decim'First, "M2W Static, Negative" ); |
| Decim_To_Wide ( Identity( 2*128.0 +2.0 ), "M2W Dynamic, At_Mod" ); |
| Decim_To_Wide ( Decim'Last, "M2W Static, Over_Mod" ); |
| |
| -- Check a few, correct, edge cases, for modular types. |
| |
| Eye_Dew: declare |
| Sense : Decim := 0.00; |
| |
| Little : Unsigned_Edge_8; |
| Moderate : Unsigned_8_Bit; |
| Big : Unsigned_Over_8; |
| |
| begin |
| Moderate := Unsigned_8_Bit (Sense); |
| Assert( Moderate = 0, "Sense => Moderate, 0"); |
| |
| Sense := 2*128.0; |
| |
| Big := Unsigned_Over_8 (Sense); |
| Assert( Big = 256, "Sense => Big, 256"); |
| |
| end Eye_Dew; |
| |
| Rounding: declare |
| Easy : Decim := Identity ( 2.0); |
| Simple : Decim := Identity ( 2.1); |
| Halfway : Decim := Identity ( 2.5); |
| Upward : Decim := Identity ( 2.8); |
| Chop : Decim := Identity (-2.2); |
| Neg_Half : Decim := Identity (-2.5); |
| Downward : Decim := Identity (-2.7); |
| |
| Little : Unsigned_Edge_8; |
| Moderate : Unsigned_8_Bit; |
| Big : Unsigned_Over_8; |
| |
| Also_Little:Signed_8_Bit; |
| Also_Big : Signed_Over_8; |
| |
| begin |
| Little := Unsigned_Edge_8 (Easy); |
| Assert( Little = 2, "Easy => Little, 2"); |
| |
| Moderate := Unsigned_8_Bit (Simple); |
| Assert( Moderate = 2, "Simple => Moderate, 2"); |
| |
| Big := Unsigned_Over_8 (Halfway); -- Rounds up by 4.6(33). |
| Assert( Big = 3, "Halfway => Big, 3"); |
| |
| Little := Unsigned_Edge_8 (Upward); |
| Assert( Little = 3, "Upward => Little, 3"); |
| |
| Also_Big := Signed_Over_8 (Halfway); -- Rounds up by 4.6(33). |
| Assert( Also_Big = 3, "Halfway => Also_Big, 3"); |
| |
| Also_Little := Signed_8_Bit (Chop); |
| Assert( Also_Little = -2, "Chop => Also_Little, -2"); |
| |
| Also_Big := Signed_Over_8 (Neg_Half); -- Rounds down by 4.6(33). |
| Assert( Also_Big = -3, "Halfway => Also_Big, -3"); |
| |
| Also_Little := Signed_8_Bit (Downward); |
| Assert( Also_Little = -3, "Downward => Also_Little, -3"); |
| |
| end Rounding; |
| |
| |
| Report.Result; |
| |
| end C460011; |
