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1 294 jeremybenn
-- CXAA018.A
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--
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--                             Grant of Unlimited Rights
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--
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--     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
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--     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
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--     unlimited rights in the software and documentation contained herein.
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--     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making
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--     this public release, the Government intends to confer upon all
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--     recipients unlimited rights  equal to those held by the Government.
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--     These rights include rights to use, duplicate, release or disclose the
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--     released technical data and computer software in whole or in part, in
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--     any manner and for any purpose whatsoever, and to have or permit others
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--     to do so.
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--
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--                                    DISCLAIMER
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--
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--     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
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--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
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--     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
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--     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
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--     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
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--     PARTICULAR PURPOSE OF SAID MATERIAL.
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--*
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--
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-- OBJECTIVE:
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--      Check that the subprograms defined in the package Text_IO.Modular_IO
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--      provide correct results.
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--
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-- TEST DESCRIPTION:
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--      This test checks that the subprograms defined in the
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--      Ada.Text_IO.Modular_IO package provide correct results.
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--      A modular type is defined and used to instantiate the generic
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--      package Ada.Text_IO.Modular_IO.  Values of the modular type are
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--      written to a Text_IO file, and to a series of string variables, using
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--      different versions of the procedure Put from the instantiated IO
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--      package.  These modular data items are retrieved from the file and
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--      string variables using the appropriate instantiated version of
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--      procedure Get.  A variety of Base and Width parameter values are
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--      used in the procedure calls.
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--
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-- APPLICABILITY CRITERIA:
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--      This test is applicable to all implementations that support Text_IO
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--      processing and external files.
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--
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--
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-- CHANGE HISTORY:
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--      03 Jul 95   SAIC    Initial prerelease version.
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--      01 May 96   SAIC    Incorporated reviewer comments for ACVC 2.1.
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--
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--!
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with Ada.Text_IO;
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with System;
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with Report;
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procedure CXAA018 is
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begin
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   Report.Test ("CXAA018", "Check that the subprograms defined in "  &
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                           "the package Text_IO.Modular_IO provide " &
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                           "correct results");
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   Test_for_Text_IO_Support:
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   declare
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      Data_File     : Ada.Text_IO.File_Type;
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      Data_Filename : constant String := Report.Legal_File_Name;
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   begin
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      -- An application creates a text file in mode Out_File, with the
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      -- intention of entering modular data into the file as appropriate.
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      -- In the event that the particular environment where the application
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      -- is running does not support Text_IO, Use_Error or Name_Error will be
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      -- raised on calls to Text_IO operations.  Either of these exceptions
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      -- will be handled to produce a Not_Applicable result.
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      Ada.Text_IO.Create (File => Data_File,
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                          Mode => Ada.Text_IO.Out_File,
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                          Name => Data_Filename);
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      Test_Block:
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      declare
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         type Mod_Type is mod System.Max_Binary_Modulus;
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         -- Max_Binary_Modulus must be at least 2**16, which would result
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         -- in a base range of 0..65535 (zero to one less than the given
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         -- modulus) for this modular type.
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         package Mod_IO is new Ada.Text_IO.Modular_IO(Mod_Type);
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         use Ada.Text_IO, Mod_IO;
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         use type Mod_Type;
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         Number_Of_Modular_Items : constant := 6;
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         Number_Of_Error_Items   : constant := 1;
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         TC_Modular              : Mod_Type;
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         TC_Last_Character_Read  : Positive;
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         Modular_Array : array (1..Number_Of_Modular_Items) of Mod_Type :=
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                                   ( 0, 97, 255, 1025, 12097, 65535 );
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         procedure Load_File (The_File : in out Ada.Text_IO.File_Type) is
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         begin
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            -- This procedure does not create, open, or close the data file;
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            -- The_File file object must be Open at this point.
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            -- This procedure is designed to load Modular_Type data into a
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            -- data file.
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            --
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            -- Use the Modular_IO procedure Put to enter modular data items
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            -- into the data file.
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            for i in 1..Number_Of_Modular_Items loop
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               -- Use default Base parameter of 10.
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               Mod_IO.Put(File  => Data_File,
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                          Item  => Modular_Array(i),
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                          Width => 6,
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                          Base  => Mod_IO.Default_Base);
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            end loop;
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            -- Enter data into the file such that on the corresponding "Get"
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            -- of this data, Data_Error must be raised.  This value is outside
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            -- the base range of Modular_Type.
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            -- Text_IO is used to enter the value in the file.
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            for i in 1..Number_Of_Error_Items loop
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               Ada.Text_IO.Put(The_File, "-10");
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            end loop;
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         end Load_File;
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         procedure Process_File(The_File : in out Ada.Text_IO.File_Type) is
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         begin
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            -- This procedure does not create, open, or close the data file;
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            -- The_File file object must be Open at this point.
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            -- Use procedure Get (for Files) to extract the modular data from
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            -- the Text_IO file.
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            for i in 1..Number_Of_Modular_Items loop
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               Mod_IO.Get(The_File, TC_Modular, Width => 6);
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               if TC_Modular /= Modular_Array(i) then
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                  Report.Failed("Incorrect modular data read from file " &
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                                "data item #" & Integer'Image(i));
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               end if;
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            end loop;
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            -- The final item in the Data_File is a modular value that is
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            -- outside the base range 0..Num'Last.  This value should raise
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            -- Data_Error on an attempt to "Get" it from the file.
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            for i in 1..Number_Of_Error_Items loop
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               begin
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                  Mod_IO.Get(The_File, TC_Modular, Mod_IO.Default_Width);
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                  Report.Failed
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                    ("Exception Data_Error not raised when Get "   &
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                     "was used to read modular data outside base " &
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                     "range of type, item # "                      &
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                     Integer'Image(i));
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               exception
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                  when Ada.Text_IO.Data_Error =>
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                     null; -- OK, expected exception.
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                  when others =>
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                     Report.Failed("Unexpected exception raised when Get "  &
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                                   "was used to read modular data outside " &
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                                   "base range of type from Data_File, "    &
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                                   "data item #" & Integer'Image(i));
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               end;
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            end loop;
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         exception
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            when others =>
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              Report.Failed
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                ("Unexpected exception raised in Process_File");
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         end Process_File;
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      begin  -- Test_Block.
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         -- Place modular values into data file.
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         Load_File(Data_File);
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         Ada.Text_IO.Close(Data_File);
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         -- Read modular values from data file.
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         Ada.Text_IO.Open(Data_File, Ada.Text_IO.In_File, Data_Filename);
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         Process_File(Data_File);
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         -- Verify versions of Modular_IO procedures Put and Get for Strings.
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         Modular_IO_in_Strings:
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         declare
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            TC_String_Array : array (1..Number_Of_Modular_Items)
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                              of String(1..30) := (others =>(others => ' '));
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         begin
200
 
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            -- Place modular values into strings using the Procedure Put,
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            -- Use a variety of different "Base" parameter values.
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            -- Note: This version of Put uses the length of the given
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            --       string as the value of the "Width" parameter.
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            for i in 1..2 loop
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               Mod_IO.Put(To   => TC_String_Array(i),
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                          Item => Modular_Array(i),
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                          Base => Mod_IO.Default_Base);
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            end loop;
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            for i in 3..4 loop
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               Mod_IO.Put(TC_String_Array(i),
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                          Modular_Array(i),
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                          Base => 2);
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            end loop;
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            for i in 5..6 loop
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               Mod_IO.Put(TC_String_Array(i), Modular_Array(i), 16);
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            end loop;
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            -- Get modular values from strings using the Procedure Get.
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            -- Compare with expected modular values.
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            for i in 1..Number_Of_Modular_Items loop
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               Mod_IO.Get(From => TC_String_Array(i),
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                          Item => TC_Modular,
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                          Last => TC_Last_Character_Read);
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               if TC_Modular /= Modular_Array(i) then
230
                  Report.Failed("Incorrect modular data value obtained "   &
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                                "from String following use of Procedures " &
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                                "Put and Get from Strings, Modular_Array " &
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                                "item #" & Integer'Image(i));
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               end if;
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            end loop;
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         exception
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            when others =>
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               Report.Failed("Unexpected exception raised during the " &
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                             "evaluation of Put and Get for Strings");
241
         end Modular_IO_in_Strings;
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      exception
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         when others => Report.Failed ("Exception raised in Test_Block");
245
      end Test_Block;
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      -- Delete the external file.
249
      if Ada.Text_IO.Is_Open(Data_File) then
250
         Ada.Text_IO.Delete(Data_File);
251
      else
252
         Ada.Text_IO.Open(Data_File,
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                          Ada.Text_IO.In_File,
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                          Data_Filename);
255
         Ada.Text_IO.Delete(Data_File);
256
      end if;
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   exception
259
 
260
      -- Since Use_Error can be raised if, for the specified mode,
261
      -- the environment does not support Text_IO operations, the
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      -- following handlers are included:
263
 
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      when Ada.Text_IO.Use_Error  =>
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         Report.Not_Applicable ("Use_Error raised on Text_IO Create");
266
 
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      when Ada.Text_IO.Name_Error =>
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         Report.Not_Applicable ("Name_Error raised on Text_IO Create");
269
 
270
      when others                 =>
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         Report.Failed ("Unexpected exception raised on text file Create");
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273
   end Test_for_Text_IO_Support;
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   Report.Result;
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end CXAA018;

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