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-- CXAA003.A

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--*

--

-- OBJECTIVE:

--      Check that the procedures New_Page, Set_Line, Set_Col, and New_Line

--      subprograms perform properly on a text file reset (from Out_File)

--      with mode Append_File.

--      Check that the attributes Page, Line, and Column are all set to 1

--      following the reset of a text file with mode Append_File.

--      Check that the functions Page, Line, and Col perform properly on a

--      text file reset with mode Append_File.

--      Check that the procedures Put and Put_Line perform properly on text

--      files reset with mode Append_File.

--      Check that the procedure Set_Line sets the current line number to

--      the value specified by the parameter "To" for text files reset with

--      mode Append_File.  Check that Set_Line has no effect if the specified

--      line equals the current line.

--      Check that the procedure Set_Col sets the current column number to

--      the value specified by the parameter "To" for text files reset with

--      mode Append_File.

--

-- TEST DESCRIPTION:

--      This test is designed to simulate the text processing that could

--      occur with files that have been created in Out_File mode,

--      and then reset to Append_File mode.

--      Various calls to Text_IO formatting subprograms are called to properly

--      position text appended to a document.  The text content and position

--      are subsequently verified for accuracy.

--

-- APPLICABILITY CRITERIA:

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

--      files.

--

--

-- CHANGE HISTORY:

--      06 Dec 94   SAIC    ACVC 2.0

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

--!

with Ada.Text_IO;

with Report;

procedure CXAA003 is

   use Ada;

   Data_File        : Text_IO.File_Type;

   Data_Filename    : constant String :=

                      Report.Legal_File_Name ( Nam => "CXAA003" );

   Incomplete       : exception;

begin

   Report.Test ("CXAA003", "Check that page, line, and column formatting " &

                           "subprograms perform properly on text files "   &

                           "reset 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 => Data_File,

                      Mode => Text_IO.Out_File,

                      Name => Data_Filename);

   exception

      when Text_IO.Use_Error | Text_IO.Name_Error =>

        Report.Not_Applicable

          ( "Text files not supported - Create as Out_File" );

        raise Incomplete;

   end Test_for_Text_IO_Support;

   Operational_Test_Block:

   declare

      Default_Position : constant Text_IO.Positive_Count := 1;

      Section_Header   : constant String := "IX.  ";

      Glossary_Title   : constant String := "GLOSSARY";

      Glossary_Content : constant String := "TBD";

      -- The following procedure simulates the addition of a Glossary page

      -- to an existing text file that has been reset with mode

      -- Append_File.

      procedure Position_Glossary_Text

        (The_File : in out Text_IO.File_Type) is

         use Text_IO;   -- To provide visibility to the "/=" operator.

      begin

         -- Test control code.

         -- Verify initial page value.

         if (Text_IO.Page (The_File) /= Default_Position) then

            Report.Failed ("Incorrect default page number");

         end if;

         -- Verify initial line number.

         if (Text_IO.Line (The_File) /= Default_Position) then

            Report.Failed ("Incorrect default line number");

         end if;

         -- Verify initial column number.

         if (Text_IO.Col (The_File) /= Default_Position) then

            Report.Failed ("Incorrect default column number");

         end if;

         -- Simulated usage code.  Set new page/line positions.

         Text_IO.New_Page (The_File);

         Text_IO.New_Page (The_File);

         Text_IO.New_Line (File => The_File, Spacing => 1);

         -- Test control code.

         if (Integer(Text_IO.Page(The_File))  /=

             Report.Ident_Int(3))                or else

            (Integer(Text_IO.Line (The_File)) /=

             Report.Ident_Int(2)) then

            Report.Failed ("Incorrect results from page/line positioning");

         end if;

         -- Simulated usage code.  Position title of Glossary.

         Text_IO.Put      (The_File, Section_Header);

         Text_IO.Put_Line (The_File, Glossary_Title);

         -- Set line to the current line.

         Text_IO.Set_Line (File => The_File, To => 3);

         -- Test control code.

         if (Integer(Text_IO.Page (The_File)) /= Report.Ident_Int(3)) or

            (Integer(Text_IO.Line (The_File)) /= Report.Ident_Int(3)) or

            (Integer(Text_IO.Col (The_File))  /= Report.Ident_Int(1)) then

            Report.Failed ("Set_Line failed for current line");

         end if;

         -- Simulated usage code.

         Text_IO.Set_Line (File => The_File, To => 4);        -- Set new

         Text_IO.Set_Col  (File => The_File, To => 10);       -- position.

         -- Test control code.

         if (Integer(Text_IO.Line (The_File)) /= Report.Ident_Int(4))  or

            (Integer(Text_IO.Col  (The_File)) /= Report.Ident_Int(10)) then

            Report.Failed

              ("Incorrect results from line/column positioning");

         end if;

         -- Simulated usage code.                          -- Position

         Text_IO.Put_Line (The_File, Glossary_Content);    -- content of

                                                           -- Glossary.

      end Position_Glossary_Text;

   begin

      -- In the scenario, data is added to the file here.

      Text_IO.Put_Line (File => Data_File, Item => "Some optional data");

      -- This code section simulates a scenario that could occur in a

      -- text processing environment.  Text is to be appended to an

      -- existing document:

      --   The file is reset to append mode.

      --   A procedure is called to perform the positioning and placement

      --   of text.

      --   The position on the appended page is set, verified, and text is

      --   placed in the file.

      --

      -- Note: The text file has been originally created in Out_File

      -- mode, and has subsequently been reset to Append_File mode.

      Reset1:

      begin

         -- Reset has effect of calling New_Page.

         Text_IO.Reset  (Data_File, Text_IO.Append_File);

      exception

         when Text_IO.Use_Error =>

            Report.Not_Applicable

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

            raise Incomplete;

      end Reset1;

      Position_Glossary_Text (The_File => Data_File);

      Test_Verification_Block:

      declare

         TC_Page, TC_Line, TC_Column  : Text_IO.Positive_Count;

         TC_Position                  : Natural := 0;

         Blanks                       : constant String  :=

           "               ";

         TC_String                    : String (1 .. 15) := Blanks;

      begin

         Reset2:

         begin

            Text_IO.Reset     (Data_File, Text_IO.In_File);

         exception

           when Text_IO.Use_Error =>

             Report.Not_Applicable

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

             raise Incomplete;

         end Reset2;

         Text_IO.Skip_Page (Data_File);

         Text_IO.Skip_Page (Data_File);

         -- If the Reset to Append_File mode actually put a page terminator

         -- on the file, as allowed (but not required) by RM A.10.2(4), then

         -- we are now on page 3, an empty page.  We'll need to skip one more.

         if Text_IO.End_Of_Page (Data_File) then

            Text_IO.Skip_Page (Data_File);

         end if;

         -- Now we're on the Glossary page.

                                                -- Loop to the second line

         for I in 1 .. 2 loop                   -- and read the contents.

            Text_IO.Get_Line (Data_File, TC_String, TC_Position);

         end loop;

            if (TC_Position /= 13) or else         -- Verify the title line.

               (TC_String (1..2)  /= "IX") or else

               (TC_String (3..13) /= (".  " & Glossary_Title)) then

               Report.Failed ("Incorrect positioning of title line");

            end if;

            TC_String := Blanks;                   -- Clear string.

                                                   -- Loop to the fourth line

            for I in 3 .. 4 loop                   -- and read the contents.

               Text_IO.Get_Line (Data_File, TC_String, TC_Position);

            end loop;

            if (TC_Position /= 12) or              -- Verify the contents.

               (TC_String (8..12) /= "  " & Glossary_Content) then

               Report.Failed ("Incorrect positioning of contents line");

            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 raised during Text_IO processing");

      end Operational_Test_Block;

      Final_Block:

      begin

         -- Delete the external file.

         if Text_IO.Is_Open (Data_File) then

            Text_IO.Delete (Data_File);

         else

            Text_IO.Open (Data_File, Text_IO.In_File, Data_Filename);

            Text_IO.Delete (Data_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 CXAA003;