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) 2001-2009, 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 3,  or (at your option) any later ver- --
  14 -- sion.  GNAT 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.                                     --
  17 --                                                                          --
  18 -- As a special exception under Section 7 of GPL version 3, you are granted --
  19 -- additional permissions described in the GCC Runtime Library Exception,   --
  20 -- version 3.1, as published by the Free Software Foundation.               --
  21 --                                                                          --
  22 -- You should have received a copy of the GNU General Public License and    --
  23 -- a copy of the GCC Runtime Library Exception along with this program;     --
  24 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  25 -- <http://www.gnu.org/licenses/>.                                          --
  26 --                                                                          --
  27 -- GNAT was originally developed  by the GNAT team at  New York University. --
  28 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31
  32 with System.Parameters;
  33
  34 package body System.Traces.Format is
  35
  36    procedure Send_Trace (Id : Trace_T; Info : String) is separate;
  37
  38    ------------------
  39    -- Format_Trace --
  40    ------------------
  41
  42    function Format_Trace (Source : String) return String_Trace is
  43       Length : constant Integer := Source'Length;
  44       Result : String_Trace     := (others => ' ');
  45
  46    begin
  47       --  If run-time tracing active, then fill the string
  48
  49       if Parameters.Runtime_Traces then
  50          if Max_Size - Length > 0 then
  51             Result (1 .. Length) := Source (1 .. Length);
  52             Result (Length + 1 .. Max_Size) := (others => ' ');
  53             Result (Length + 1) := ASCII.NUL;
  54          else
  55             Result (1 .. Max_Size - 1) :=
  56               Source (Source'First .. Source'First - 1 + Max_Size - 1);
  57             Result (Max_Size) := ASCII.NUL;
  58          end if;
  59       end if;
  60
  61       return Result;
  62    end Format_Trace;
  63
  64    ------------
  65    -- Append --
  66    ------------
  67
  68    function Append
  69      (Source : String_Trace;
  70       Annex  : String) return String_Trace
  71    is
  72       Result        : String_Trace     := (others => ' ');
  73       Annex_Length  : constant Integer := Annex'Length;
  74       Source_Length : Integer;
  75
  76    begin
  77       if Parameters.Runtime_Traces then
  78
  79          --  First we determine the size used, without the spaces at the end,
  80          --  if a String_Trace is present. Look at System.Traces.Tasking for
  81          --  examples.
  82
  83          Source_Length := 1;
  84          while Source (Source_Length) /= ASCII.NUL loop
  85             Source_Length := Source_Length + 1;
  86          end loop;
  87
  88          --  Then we fill the string
  89
  90          if Source_Length - 1 + Annex_Length <= Max_Size then
  91             Result (1 .. Source_Length - 1) :=
  92               Source (1 .. Source_Length - 1);
  93
  94             Result (Source_Length .. Source_Length - 1 + Annex_Length) :=
  95               Annex (1 ..  Annex_Length);
  96
  97             Result (Source_Length + Annex_Length) := ASCII.NUL;
  98
  99             Result (Source_Length + Annex_Length + 1 .. Max_Size) :=
 100               (others => ' ');
 101
 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;