------------------------------------------------------------------------------
--                                                                          --
--                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
--                                                                          --
--                  S Y S T E M . T R A C E S . F O R M A T                 --
--                                                                          --
--                                  B o d y                                 --
--                                                                          --
--          Copyright (C) 2001-2009, Free Software Foundation, Inc.         --
--                                                                          --
-- GNARL is free software;  you can redistribute it  and/or modify it under --
-- terms of the  GNU General Public License as published  by the Free Soft- --
-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
--                                                                          --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception,   --
-- version 3.1, as published by the Free Software Foundation.               --
--                                                                          --
-- You should have received a copy of the GNU General Public License and    --
-- a copy of the GCC Runtime Library Exception along with this program;     --
-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
-- <http://www.gnu.org/licenses/>.                                          --
--                                                                          --
-- GNAT was originally developed  by the GNAT team at  New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc.      --
--                                                                          --
------------------------------------------------------------------------------

with System.Parameters;

package body System.Traces.Format is

   procedure Send_Trace (Id : Trace_T; Info : String) is separate;

   ------------------
   -- Format_Trace --
   ------------------

   function Format_Trace (Source : String) return String_Trace is
      Length : constant Integer := Source'Length;
      Result : String_Trace     := (others => ' ');

   begin
      --  If run-time tracing active, then fill the string

      if Parameters.Runtime_Traces then
         if Max_Size - Length > 0 then
            Result (1 .. Length) := Source (1 .. Length);
            Result (Length + 1 .. Max_Size) := (others => ' ');
            Result (Length + 1) := ASCII.NUL;
         else
            Result (1 .. Max_Size - 1) :=
              Source (Source'First .. Source'First - 1 + Max_Size - 1);
            Result (Max_Size) := ASCII.NUL;
         end if;
      end if;

      return Result;
   end Format_Trace;

   ------------
   -- Append --
   ------------

   function Append
     (Source : String_Trace;
      Annex  : String) return String_Trace
   is
      Result        : String_Trace     := (others => ' ');
      Annex_Length  : constant Integer := Annex'Length;
      Source_Length : Integer;

   begin
      if Parameters.Runtime_Traces then

         --  First we determine the size used, without the spaces at the end,
         --  if a String_Trace is present. Look at System.Traces.Tasking for
         --  examples.

         Source_Length := 1;
         while Source (Source_Length) /= ASCII.NUL loop
            Source_Length := Source_Length + 1;
         end loop;

         --  Then we fill the string

         if Source_Length - 1 + Annex_Length <= Max_Size then
            Result (1 .. Source_Length - 1) :=
              Source (1 .. Source_Length - 1);

            Result (Source_Length .. Source_Length - 1 + Annex_Length) :=
              Annex (1 ..  Annex_Length);

            Result (Source_Length + Annex_Length) := ASCII.NUL;

            Result (Source_Length + Annex_Length + 1 .. Max_Size) :=
              (others => ' ');

         else
            Result (1 .. Source_Length - 1) := Source (1 .. Source_Length - 1);
            Result (Source_Length .. Max_Size - 1) :=
              Annex (1 .. Max_Size - Source_Length);
            Result (Max_Size) := ASCII.NUL;
         end if;
      end if;

      return Result;
   end Append;

end System.Traces.Format;