ADA Programming Guide/ADA Programming Guide.iso/ada_tut/txt2dat.ada

Text File | 1996-01-30 | 2KB | 52 lines

-- TXT2DAT.ADA   Ver. 3.00   22-AUG-1994   Copyright 1988-1994 John J. Herro
-- Software Innovations Technology
-- 1083 Mandarin Drive NE, Palm Bay, FL  32905-4706   [phone]
--
-- After running DAT2TXT on a PC and transferring the resulting TUTOR.TXT
-- file to another computer, compile and run this program on the other
-- computer to create ADA_TUTR.DAT on that machine.
--
with Direct_IO, Text_IO;
procedure TXT2DAT is
   subtype Block_Subtype is String(1 .. 64);
   package Random_IO is new Direct_IO(Block_Subtype);
   Text_File  : Text_IO.File_Type;                           -- The input file.
   Data_File  : Random_IO.File_Type;                        -- The output file.
   OK         : Boolean := True;     -- True when both files open successfully.
   Input      : String(1 .. 65);           -- Line of text read from TUTOR.TXT.
   Len        : Integer;                 -- Length of line read from TUTOR.TXT.
   Legal_Note : constant String := " Copyright 1988-94 John J. Herro ";
                       -- Legal_Note isn't used by the program, but it causes
                       -- most compilers to place this string in the .EXE file.
begin
   begin
      Text_IO.Open(Text_File, Mode => Text_IO.In_File, Name => "TUTOR.TXT");
   exception
      when Text_IO.Name_Error =>
         Text_IO.Put_Line(
              "I'm sorry.  The file TUTOR.TXT seems to be missing.");
         OK := False;
   end;
   begin
      Random_IO.Create(Data_File, Random_IO.Out_File, Name => "ADA_TUTR.DAT");
   exception
      when others =>
         Text_IO.Put_Line("I'm sorry.  I can't seem to create ADA_TUTR.DAT.");
         Text_IO.Put_Line("Perhaps that file already exists?");
         OK := False;
   end;
   if OK then
      while not Text_IO.End_Of_File(Text_File) loop
         Text_IO.Get_Line(File => Text_File, Item => Input, Last => Len);
         if Len > 3 then  -- In case extra CRs/LFs were added to the text file.
            Input(Len + 1 .. 64) := (others => ' ');
              -- In case trailing blanks were lost when transferring TUTOR.TXT.
            Random_IO.Write(Data_File, Item => Input(1 .. 64));
         end if;
      end loop;
      Text_IO.Close(Text_File);
      Random_IO.Close(Data_File);
      Text_IO.Put_Line("ADA_TUTR.DAT created.");
   end if;
end TXT2DAT;