gcc/ada/s-trafor-default.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
   4 --                                                                          --
   5 --                  S Y S T E M . T R A C E S . F O R M A T                 --
   6 --                                                                          --
   7 --                                  B o d y                                 --
   8 --                                                                          --
   9 --           Copyright (C) 2001-2006 Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- GNARL is free software; you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  14 -- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNARL; see file COPYING.  If not, write --
  19 -- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, USA.                                              --
  21 --                                                                          --
  22 -- As a special exception,  if other files  instantiate  generics from this --
  23 -- unit, or you link  this unit with other files  to produce an executable, --
  24 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  25 -- covered  by the  GNU  General  Public  License.  This exception does not --
  26 -- however invalidate  any other reasons why  the executable file  might be --
  27 -- covered by the  GNU Public License.                                      --
  28 --                                                                          --
  29 -- GNAT was originally developed  by the GNAT team at  New York University. --
  30 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  31 --                                                                          --
  32 ------------------------------------------------------------------------------
  33
  34 with System.Parameters;
  35
  36 package body System.Traces.Format is
  37
  38    procedure Send_Trace (Id : Trace_T; Info : String) is separate;
  39
  40    ------------------
  41    -- Format_Trace --
  42    ------------------
  43
  44    function Format_Trace (Source : String) return String_Trace is
  45       Length : Integer      := Source'Length;
  46       Result : String_Trace := (others => ' ');
  47
  48    begin
  49       --  If run-time tracing active, then fill the string
  50
  51       if Parameters.Runtime_Traces then
  52          if Max_Size - Length > 0 then
  53             Result (1 .. Length) := Source (1 .. Length);
  54             Result (Length + 1 .. Max_Size) := (others => ' ');
  55             Result (Length + 1) := ASCII.NUL;
  56          else
  57             Result (1 .. Max_Size - 1) := Source (1 .. Max_Size - 1);
  58             Result (Max_Size) := ASCII.NUL;
  59          end if;
  60       end if;
  61
  62       return Result;
  63    end Format_Trace;
  64
  65    ------------
  66    -- Append --
  67    ------------
  68
  69    function Append
  70      (Source : String_Trace;
  71       Annex  : String)
  72       return   String_Trace
  73    is
  74       Result        : String_Trace := (others => ' ');
  75       Source_Length : Integer := 1;
  76       Annex_Length  : Integer := Annex'Length;
  77
  78    begin
  79       if Parameters.Runtime_Traces then
  80
  81          --  First we determine the size used, without the spaces at the
  82          --  end, if a String_Trace is present. Look at
  83          --  System.Traces.Tasking for examples.
  84
  85          while Source (Source_Length) /= ASCII.NUL loop
  86             Source_Length := Source_Length + 1;
  87          end loop;
  88
  89          --  Then we fill the string.
  90
  91          if Source_Length - 1 + Annex_Length <= Max_Size then
  92             Result (1 .. Source_Length - 1) :=
  93               Source (1 .. Source_Length - 1);
  94
  95             Result (Source_Length .. Source_Length - 1 + Annex_Length) :=
  96               Annex (1 ..  Annex_Length);
  97
  98             Result (Source_Length + Annex_Length) := ASCII.NUL;
  99
 100             Result (Source_Length + Annex_Length + 1 .. Max_Size) :=
 101               (others => ' ');
 102          else
 103             Result (1 .. Source_Length - 1) := Source (1 .. Source_Length - 1);
 104             Result (Source_Length .. Max_Size - 1) :=
 105               Annex (1 .. Max_Size - Source_Length);
 106             Result (Max_Size) := ASCII.NUL;
 107          end if;
 108       end if;
 109
 110       return Result;
 111    end Append;
 112
 113 end System.Traces.Format;