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   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --                              G N A T . I O                               --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --                     Copyright (C) 1995-2010, AdaCore                     --
  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 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 --  A simple preelaborable subset of Text_IO capabilities
  33
  34 --  A simple text I/O package that can be used for simple I/O functions in
  35 --  user programs as required. This package is also preelaborated, unlike
  36 --  Text_IO, and can thus be with'ed by preelaborated library units.
  37
  38 --  Note that Data_Error is not raised by these subprograms for bad data.
  39 --  If such checks are needed then the regular Text_IO package must be used.
  40
  41 package GNAT.IO is
  42    pragma Preelaborate;
  43
  44    type File_Type is limited private;
  45    --  Specifies file to be used (the only possibilities are Standard_Output
  46    --  and Standard_Error). There is no Create or Open facility that would
  47    --  allow more general use of file names.
  48
  49    function Standard_Output return File_Type;
  50    function Standard_Error  return File_Type;
  51    --  These functions are the only way to get File_Type values
  52
  53    procedure Get (X : out Integer);
  54    procedure Get (C : out Character);
  55    procedure Get_Line (Item : out String; Last : out Natural);
  56    --  These routines always read from Standard_Input
  57
  58    procedure Put (File : File_Type; X : Integer);
  59    procedure Put (X : Integer);
  60    --  Output integer to specified file, or to current output file, same
  61    --  output as if Ada.Text_IO.Integer_IO had been instantiated for Integer.
  62
  63    procedure Put (File : File_Type; C : Character);
  64    procedure Put (C : Character);
  65    --  Output character to specified file, or to current output file
  66
  67    procedure Put (File : File_Type; S : String);
  68    procedure Put (S : String);
  69    --  Output string to specified file, or to current output file
  70
  71    procedure Put_Line (File : File_Type; S : String);
  72    procedure Put_Line (S : String);
  73    --  Output string followed by new line to specified file, or to
  74    --  current output file.
  75
  76    procedure New_Line (File : File_Type; Spacing : Positive := 1);
  77    procedure New_Line (Spacing : Positive := 1);
  78    --  Output new line character to specified file, or to current output file
  79
  80    procedure Set_Output (File : File_Type);
  81    --  Set current output file, default is Standard_Output if no call to
  82    --  Set_Output is made.
  83
  84 private
  85    type File_Type is (Stdout, Stderr);
  86    --  Stdout = Standard_Output, Stderr = Standard_Error
  87
  88    pragma Inline (Standard_Error);
  89    pragma Inline (Standard_Output);
  90
  91 end GNAT.IO;