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-- CXACA01.A

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--*

--

-- OBJECTIVE:

--      Check that the default attributes 'Write and 'Read work properly when

--      used with objects of a variety of types, including records with

--      default discriminants, records without default discriminants, but

--      which have the discriminant described in a representation clause for

--      the type, and arrays.

--

-- TEST DESCRIPTION:

--      This test simulates a basic sales record system, using Stream_IO to

--      allow the storage of heterogeneous data in a single stream file.

--

--      Four types of data are written to the stream file for each product.

--      First, the "header" information on the product is written.

--      This is an object of a discriminated (with default) record

--      type.  This is followed by an integer object containing a count of

--      the number of sales data records to follow.  The corresponding number

--      of sales records follow in the stream.  These are of a record type

--      with a discriminant without a default, but where the discriminant is

--      included in the representation clause for the type. Finally, an

--      array object with statistical sales information for the product is

--      written to the stream.

--

--      Objects of both record types specified below (discriminated records

--      with defaults, and discriminated records w/o defaults that have the

--      discriminant included in a representation clause for the type) should

--      have their discriminants included in the stream when using 'Write.

--      Likewise, discriminants should be extracted from the stream when

--      using 'Read.

--

-- APPLICABILITY CRITERIA:

--      Applicable to all implementations that support external

--      Stream_IO files.

--

--

-- CHANGE HISTORY:

--      06 Dec 94   SAIC    ACVC 2.0

--

--!

with FXACA00;

with Ada.Streams.Stream_IO;

with Report;

procedure CXACA01 is

begin

   Report.Test ("CXACA01", "Check that 'Write and 'Read work properly " &

                           "when used with complex data types");

   Test_for_Stream_IO_Support:

   declare

      Info_File    : Ada.Streams.Stream_IO.File_Type;

      Info_Stream  : Ada.Streams.Stream_IO.Stream_Access;

      The_Filename : constant String := Report.Legal_File_Name;

   begin

      -- If an implementation does not support Stream_IO in a particular

      -- environment, the exception Use_Error or Name_Error will be raised on

      -- calls to various Stream_IO operations.  This block statement

      -- encloses a call to Create, which should produce an exception in a

      -- non-supportive environment.  These exceptions will be handled to

      -- produce a Not_Applicable result.

      Ada.Streams.Stream_IO.Create (Info_File,

                                    Ada.Streams.Stream_IO.Out_File,

                                    The_Filename);

      Operational_Test_Block:

      declare

      begin

         Info_Stream := Ada.Streams.Stream_IO.Stream (Info_File);

         -- Write all of the product information (record, integer, and array

         -- objects) defined in package FXACA00 into the stream.

         Store_Data_Block:

         begin

            -- Write information about first product to the stream.

            FXACA00.Product_Type'Write (Info_Stream, FXACA00.Product_01);

            Integer'Write (Info_Stream, FXACA00.Sale_Count_01);

            FXACA00.Sales_Record_Type'Write(Info_Stream, FXACA00.Sale_Rec_01);

            FXACA00.Sales_Record_Type'Write(Info_Stream, FXACA00.Sale_Rec_02);

            FXACA00.Sales_Statistics_Type'Write

              (Info_Stream, FXACA00.Product_01_Stats);

            -- Write information about second product to the stream.

            -- Note: No Sales_Record_Type objects.

            FXACA00.Product_Type'Write (Info_Stream, FXACA00.Product_02);

            Integer'Write (Info_Stream, FXACA00.Sale_Count_02);

            FXACA00.Sales_Statistics_Type'Write

              (Info_Stream, FXACA00.Product_02_Stats);

            -- Write information about third product to the stream.

            FXACA00.Product_Type'Write (Info_Stream, FXACA00.Product_03);

            Integer'Write (Info_Stream, FXACA00.Sale_Count_03);

            FXACA00.Sales_Record_Type'Write(Info_Stream, FXACA00.Sale_Rec_03);

            FXACA00.Sales_Record_Type'Write(Info_Stream, FXACA00.Sale_Rec_04);

            FXACA00.Sales_Record_Type'Write(Info_Stream, FXACA00.Sale_Rec_05);

            FXACA00.Sales_Statistics_Type'Write

              (Info_Stream, FXACA00.Product_03_Stats);

         end Store_Data_Block;

         Verify_Data_Block:

         declare

            use FXACA00;   -- Used within this block only.

            type Domestic_Rec_Array_Type is

              array (Positive range <>) of Sales_Record_Type (Domestic);

            type Foreign_Rec_Array_Type is

              array (Positive range <>) of Sales_Record_Type (Foreign);

            TC_Rec1 : Domestic_Rec_Array_Type (1..2);

            TC_Rec3 : Foreign_Rec_Array_Type  (1..3);

            TC_Product1 : Product_Type;

            TC_Product2,

            TC_Product3 : Product_Type (Foreign);

            TC_Count1,

            TC_Count2,

            TC_Count3   : Integer := -10;  -- Initialized to dummy value.

            TC_Stat1,

            TC_Stat2,

            TC_Stat3    : Sales_Statistics_Type := (others => 500);

         begin

            Ada.Streams.Stream_IO.Reset (Info_File,

                                         Ada.Streams.Stream_IO.In_File);

            -- Read all of the data that is contained in the stream.

            -- Compare all data with the original data in package FXACA00

            -- that was written to the stream.

            -- The calls to the read attribute are in anticipated order, based

            -- on the order of data written to the stream.  Possible errors,

            -- such as data placement, overwriting, etc., will be manifest as

            -- exceptions raised by the attribute during an unsuccessful read

            -- attempt.

            -- Extract data on first product.

            Product_Type'Read          (Info_Stream, TC_Product1);

            Integer'Read               (Info_Stream, TC_Count1);

            -- Two "domestic" variant sales records will be read from the

            -- stream.

            for i in 1 .. TC_Count1 loop

               Sales_Record_Type'Read     (Info_Stream, TC_Rec1(i) );

            end loop;

            Sales_Statistics_Type'Read (Info_Stream, TC_Stat1);

            -- Extract data on second product.

            Product_Type'Read          (Info_Stream, TC_Product2);

            Integer'Read               (Info_Stream, TC_Count2);

            Sales_Statistics_Type'Read (Info_Stream, TC_Stat2);

            -- Extract data on third product.

            Product_Type'Read          (Info_Stream, TC_Product3);

            Integer'Read               (Info_Stream, TC_Count3);

            -- Three "foreign" variant sales records will be read from the

            -- stream.

            for i in 1 .. TC_Count3 loop

               Sales_Record_Type'Read     (Info_Stream, TC_Rec3(i) );

            end loop;

            Sales_Statistics_Type'Read (Info_Stream, TC_Stat3);

            -- After all the data has been correctly extracted, the file

            -- should be empty.

            if not Ada.Streams.Stream_IO.End_Of_File (Info_File) then

               Report.Failed ("Stream file not empty");

            end if;

            -- Verify that the data values read from the stream are the same

            -- as those written to the stream.

            -- Verify the information of the first product.

            if ((Product_01             /= TC_Product1)             or else

                (Product_01.Manufacture /= TC_Product1.Manufacture) or else

                (Sale_Count_01          /= TC_Count1)               or else

                (Sale_Rec_01            /= TC_Rec1(1))              or else

                (Sale_Rec_01.Buyer      /= TC_Rec1(1).Buyer)        or else

                (Sale_Rec_02            /= TC_Rec1(2))              or else

                (Sale_Rec_02.Buyer      /= TC_Rec1(2).Buyer)        or else

                (Product_01_Stats       /= TC_Stat1))

            then

               Report.Failed ("Product 1 information incorrect");

            end if;

            -- Verify the information of the second product.

            if not ((Product_02       = TC_Product2) and then

                    (Sale_Count_02    = TC_Count2)   and then

                    (Product_02_Stats = TC_Stat2))

            then

               Report.Failed ("Product 2 information incorrect");

            end if;

            -- Verify the information of the third product.

            if ((Product_03             /= TC_Product3)             or else

                (Product_03.Manufacture /= TC_Product3.Manufacture) or else

                (Sale_Count_03          /= TC_Count3)               or else

                (Sale_Rec_03            /= TC_Rec3(1))              or else

                (Sale_Rec_03.Buyer      /= TC_Rec3(1).Buyer)        or else

                (Sale_Rec_04            /= TC_Rec3(2))              or else

                (Sale_Rec_04.Buyer      /= TC_Rec3(2).Buyer)        or else

                (Sale_Rec_05            /= TC_Rec3(3))              or else

                (Sale_Rec_05.Buyer      /= TC_Rec3(3).Buyer)        or else

                (Product_03_Stats       /= TC_Stat3))

            then

               Report.Failed ("Product 3 information incorrect");

            end if;

         end Verify_Data_Block;

      exception

         when others =>

            Report.Failed ("Exception raised in Operational Test Block");

      end Operational_Test_Block;

      if Ada.Streams.Stream_IO.Is_Open (Info_File) then

         Ada.Streams.Stream_IO.Delete (Info_File);

      else

         Ada.Streams.Stream_IO.Open (Info_File,

                                     Ada.Streams.Stream_IO.In_File,

                                     The_Filename);

         Ada.Streams.Stream_IO.Delete (Info_File);

      end if;

   exception

      -- Since Use_Error or Name_Error can be raised if, for the specified

      -- mode, the environment does not support Stream_IO operations,

      -- the following handlers are included:

      when Ada.Streams.Stream_IO.Name_Error =>

         Report.Not_Applicable ("Name_Error raised on Stream IO Create");

      when Ada.Streams.Stream_IO.Use_Error  =>

         Report.Not_Applicable ("Use_Error raised on Stream IO Create");

      when others                           =>

         Report.Failed ("Unexpected exception raised on Stream IO Create");

   end Test_for_Stream_IO_Support;

   Report.Result;

end CXACA01;