gcc/ada/g-io.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUNTIME COMPONENTS                          --
   4 --                                                                          --
   5 --                              G N A T . I O                               --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --                            $Revision: 1.10 $
  10 --                                                                          --
  11 --           Copyright (C) 1995-2001 Ada Core Technologies, Inc.            --
  12 --                                                                          --
  13 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  14 -- terms of the  GNU General Public License as published  by the Free Soft- --
  15 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  16 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  17 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  18 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  19 -- for  more details.  You should have  received  a copy of the GNU General --
  20 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  21 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  22 -- MA 02111-1307, USA.                                                      --
  23 --                                                                          --
  24 -- As a special exception,  if other files  instantiate  generics from this --
  25 -- unit, or you link  this unit with other files  to produce an executable, --
  26 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  27 -- covered  by the  GNU  General  Public  License.  This exception does not --
  28 -- however invalidate  any other reasons why  the executable file  might be --
  29 -- covered by the  GNU Public License.                                      --
  30 --                                                                          --
  31 -- GNAT is maintained by Ada Core Technologies Inc (http://www.gnat.com).   --
  32 --                                                                          --
  33 ------------------------------------------------------------------------------
  34
  35 --  A simple preelaborable subset of Text_IO capabilities
  36
  37 --  A simple text I/O package that can be used for simple I/O functions in
  38 --  user programs as required. This package is also preelaborated, unlike
  39 --  Text_Io, and can thus be with'ed by preelaborated library units.
  40
  41 --  Note that Data_Error is not raised by these subprograms for bad data.
  42 --  If such checks are needed then the regular Text_IO package such be used.
  43
  44 package GNAT.IO is
  45 pragma Preelaborate (IO);
  46
  47    type File_Type is limited private;
  48    --  Specifies file to be used (the only possibilities are Standard_Output
  49    --  and Standard_Error). There is no Create or Open facility that would
  50    --  allow more general use of file names.
  51
  52    function Standard_Output return File_Type;
  53    function Standard_Error  return File_Type;
  54    --  These functions are the only way to get File_Type values
  55
  56    procedure Get (X : out Integer);
  57    procedure Get (C : out Character);
  58    procedure Get_Line (Item : in out String; Last : out Natural);
  59    --  These routines always read from Standard_Input
  60
  61    procedure Put (File : File_Type; X : Integer);
  62    procedure Put (X : Integer);
  63    --  Output integer to specified file, or to current output file, same
  64    --  output as if Ada.Text_IO.Integer_IO had been instantiated for Integer.
  65
  66    procedure Put (File : File_Type; C : Character);
  67    procedure Put (C : Character);
  68    --  Output character to specified file, or to current output file
  69
  70    procedure Put (File : File_Type; S : String);
  71    procedure Put (S : String);
  72    --  Output string to specified file, or to current output file
  73
  74    procedure Put_Line (File : File_Type; S : String);
  75    procedure Put_Line (S : String);
  76    --  Output string followed by new line to specified file, or to
  77    --  current output file.
  78
  79    procedure New_Line (File : File_Type; Spacing : Positive := 1);
  80    procedure New_Line (Spacing : Positive := 1);
  81    --  Output new line character to specified file, or to current output file
  82
  83    procedure Set_Output (File : File_Type);
  84    --  Set current output file, default is Standard_Output if no call to
  85    --  Set_Output is made.
  86
  87 private
  88    type File_Type is (Stdout, Stderr);
  89    --  Stdout = Standard_Output, Stderr = Standard_Error
  90
  91    pragma Inline (Standard_Error);
  92    pragma Inline (Standard_Output);
  93
  94 end GNAT.IO;