gcc/ada/s-io.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --                            S Y S T E M . I O                             --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2006, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- GNAT 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.  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.  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 GNAT;  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 package body System.IO is
  35
  36    Current_Out : File_Type := Stdout;
  37    pragma Atomic (Current_Out);
  38    --  Current output file (modified by Set_Output)
  39
  40    --------------
  41    -- New_Line --
  42    --------------
  43
  44    procedure New_Line (Spacing : Positive := 1) is
  45    begin
  46       for J in 1 .. Spacing loop
  47          Put (ASCII.LF);
  48       end loop;
  49    end New_Line;
  50
  51    ---------
  52    -- Put --
  53    ---------
  54
  55    procedure Put (X : Integer) is
  56       procedure Put_Int (X : Integer);
  57       pragma Import (C, Put_Int, "put_int");
  58
  59       procedure Put_Int_Err (X : Integer);
  60       pragma Import (C, Put_Int_Err, "put_int_stderr");
  61
  62    begin
  63       case Current_Out is
  64          when Stdout =>
  65             Put_Int (X);
  66          when Stderr =>
  67             Put_Int_Err (X);
  68       end case;
  69    end Put;
  70
  71    procedure Put (C : Character) is
  72       procedure Put_Char (C : Character);
  73       pragma Import (C, Put_Char, "put_char");
  74
  75       procedure Put_Char_Stderr (C : Character);
  76       pragma Import (C, Put_Char_Stderr, "put_char_stderr");
  77
  78    begin
  79       case Current_Out is
  80          when Stdout =>
  81             Put_Char (C);
  82          when Stderr =>
  83             Put_Char_Stderr (C);
  84       end case;
  85    end Put;
  86
  87    procedure Put (S : String) is
  88    begin
  89       for J in S'Range loop
  90          Put (S (J));
  91       end loop;
  92    end Put;
  93
  94    --------------
  95    -- Put_Line --
  96    --------------
  97
  98    procedure Put_Line (S : String) is
  99    begin
 100       Put (S);
 101       New_Line;
 102    end Put_Line;
 103
 104    ---------------------
 105    -- Standard_Output --
 106    ---------------------
 107
 108    function Standard_Output return File_Type is
 109    begin
 110       return Stdout;
 111    end Standard_Output;
 112
 113    --------------------
 114    -- Standard_Error --
 115    --------------------
 116
 117    function Standard_Error return File_Type is
 118    begin
 119       return Stderr;
 120    end Standard_Error;
 121
 122    ----------------
 123    -- Set_Output --
 124    ----------------
 125
 126    procedure Set_Output (File : File_Type) is
 127    begin
 128       Current_Out := File;
 129    end Set_Output;
 130
 131 end System.IO;