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-- CXAA008.A

--

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--     PARTICULAR PURPOSE OF SAID MATERIAL.

--*

--

-- OBJECTIVE:

--      Check that the capabilities provided in instantiations of the

--      Ada.Text_IO.Fixed_IO package operate correctly when the mode of

--      the file is Append_File.  Check that Fixed_IO procedures Put and Get

--      properly transfer fixed point data to/from data files that are in

--      Append_File mode.  Check that the formatting parameters available in

--      the package can be used and modified successfully in the appending and

--      retrieval of data.

--

-- TEST DESCRIPTION:

--      This test simulates order processing, with data values being written

--      to a file, in a specific format, using Fixed_IO.  Validation is done

--      on this process by reading the data values from the file, and

--      comparing them for equality with the values originally written to

--      the file.

--

--      This test verifies issues of create in Append_File mode, appending to

--      a file previously appended to, resetting to Append_File mode,

--      resetting from Append_File mode to In_File mode, as well as a

--      variety of Text_IO and Fixed_IO predefined subprograms.

--

-- APPLICABILITY CRITERIA:

--      This test is applicable only to implementations that support text

--      files.

--

--

-- CHANGE HISTORY:

--      06 Dec 94   SAIC    ACVC 2.0

--      25 Feb 97   PWB.CTA Allowed for non-support of some IO operations

--!

with Ada.Text_IO;

with Report;

procedure CXAA008 is

   use Ada;

   Inventory_File     : Text_IO.File_Type;

   Inventory_Filename : constant String :=

                          Report.Legal_File_Name ( Nam => "CXAA008" );

   Incomplete         : exception;

begin

   Report.Test ("CXAA008", "Check that the capabilities of "               &

                           "Text_IO.Fixed_IO operate correctly for files " &

                           "with mode Append_File");

   Test_for_Text_IO_Support:

   begin

      -- An implementation that does not support Text_IO in a particular

      -- environment will raise Use_Error on calls to various

      -- Text_IO operations.  This block statement encloses a call to

      -- Create, which should raise the exception in a non-supportive

      -- environment.  This exception will be handled to produce a

      -- Not_Applicable result.

      Text_IO.Create (File => Inventory_File,

                      Mode => Text_IO.Append_File,

                      Name => Inventory_Filename);

   exception

      when Text_IO.Use_Error | Text_IO.Name_Error =>

         Report.Not_Applicable

            ( "Files not supported - Create with Append_File for Text_IO" );

         raise Incomplete;

   end Test_For_Text_IO_Support;

   Operational_Test_Block:

   declare

      Daily_Orders_Received : constant Natural := 4;

      type Item_Type   is delta 0.1  range    0.0 .. 5000.0;

      type Cost_Type   is delta 0.01 range    0.0 .. 10_000.0;

      type Profit_Type is delta 0.01 range -100.0 .. 1000.0;

      type Product_Type is record

         Item_Number    : Item_Type   := 0.0;

         Unit_Cost      : Cost_Type   := 0.00;

         Percent_Markup : Profit_Type := 0.00;

      end record;

      type Inventory_Type is

        array (1 .. Daily_Orders_Received) of Product_Type;

      Daily_Inventory   : Inventory_Type := ((   1.0,   1.75,  50.00),

                                             ( 155.0,  20.00,  -5.50),

                                             (3343.5,   2.50, 126.50),

                                             (4986.0, 180.00,  31.75));

      package Item_IO   is new Text_IO.Fixed_IO (Item_Type);

      package Cost_IO   is new Text_IO.Fixed_IO (Cost_Type);

      package Markup_IO is new Text_IO.Fixed_IO (Profit_Type);

      function TC_Mode_Selection (Selector : Integer)

        return Text_IO.File_Mode is

      begin

         case Selector is

            when 1       => return Text_IO.In_File;

            when 2       => return Text_IO.Out_File;

            when others  => return Text_IO.Append_File;

         end case;

      end TC_Mode_Selection;

      -- The following function simulates the addition of inventory item

      -- information into a data file.  Boolean status of True is returned

      -- if all of the data entry was successful, False otherwise.

      function Update_Inventory (The_List : Inventory_Type)

        return Boolean is

      begin

         for I in 1 .. Daily_Orders_Received loop

            Item_IO.Put  (Inventory_File, The_List(I).Item_Number);

            Cost_IO.Put  (Inventory_File, The_List(I).Unit_Cost, 10, 4, 0);

            Markup_IO.Put(File => Inventory_File,

                          Item => The_List(I).Percent_Markup,

                          Fore => 6,

                          Aft  => 3,

                          Exp  => 2);

            Text_IO.New_Line (Inventory_File);

         end loop;

         return (True);                         -- Return a Status value.

      exception

         when others => return False;

      end Update_Inventory;

   begin

      -- This code section simulates a receiving department maintaining a

      -- data file containing information on items that have been ordered

      -- and received.

      -- Whenever items are received, the file is reset to Append_File

      -- mode.  Data is taken from an inventory list and entered into the

      -- file, in specific format.

      Reset1:

      begin                                                -- Reset to

         Text_IO.Reset (Inventory_File,                    -- Append mode.

                        TC_Mode_Selection (Report.Ident_Int(3)));

      exception

         when Text_IO.Use_Error =>

            Report.Not_Applicable

               ( "Reset to Append_File not supported for Text_IO" );

      end Reset1;

                                                           -- Enter data.

      if not Update_Inventory (The_List => Daily_Inventory) then

         Report.Failed ("Exception occurred during inventory update");

         raise Incomplete;

      end if;

      Test_Verification_Block:

      declare

         TC_Item       : Item_Type;

         TC_Cost       : Cost_Type;

         TC_Markup     : Profit_Type;

         TC_Item_Count : Natural := 0;

      begin

         Reset2:

         begin

            Text_IO.Reset (Inventory_File, Text_IO.In_File);  -- Reset for

                                                              -- reading.

         exception

            when Text_IO.Use_Error =>

               Report.Not_Applicable

                  ( "Reset to In_File not supported for Text_IO" );

               raise Incomplete;

         end Reset2;

         while not Text_IO.End_Of_File (Inventory_File) loop

            Item_IO.Get   (Inventory_File, TC_Item);

            Cost_IO.Get   (Inventory_File, TC_Cost);

            Markup_IO.Get (File  => Inventory_File,

                           Item  => TC_Markup,

                           Width => 0);

            Text_IO.Skip_Line (Inventory_File);

            TC_Item_Count := TC_Item_Count + 1;

            -- Verify all of the data fields read from the file.  Compare

            -- with the values that were originally entered into the file.

            if (TC_Item /= Daily_Inventory(TC_Item_Count).Item_Number) then

               Report.Failed ("Error in Item_Number read from file");

            end if;

            if (TC_Cost /= Daily_Inventory(TC_Item_Count).Unit_Cost) then

               Report.Failed ("Error in Unit_Cost read from file");

            end if;

            if not (TC_Markup =

                    Daily_Inventory(TC_Item_Count).Percent_Markup) then

               Report.Failed ("Error in Percent_Markup read from file");

            end if;

         end loop;

         if (TC_Item_Count /= Daily_Orders_Received) then

            Report.Failed ("Incorrect number of records read from file");

         end if;

      exception

         when Incomplete =>

            raise;

         when others =>

            Report.Failed ("Error raised during data verification");

      end Test_Verification_Block;

   exception

      when Incomplete =>

         raise;

      when others =>

         Report.Failed ("Exception in Text_IO.Fixed_IO processing");

   end Operational_Test_Block;

   Final_Block:

   begin

      -- Delete the external file.

      if Text_IO.Is_Open (Inventory_File) then

         Text_IO.Delete (Inventory_File);

      else

         Text_IO.Open (Inventory_File, Text_IO.In_File, Inventory_Filename);

         Text_IO.Delete (Inventory_File);

      end if;

   exception

      when others =>

         Report.Failed ( "Delete not properly implemented for Text_IO" );

   end Final_Block;

   Report.Result;

exception

   when Incomplete =>

      Report.Result;

   when others     =>

      Report.Failed ( "Unexpected exception" );

      Report.Result;

end CXAA008;