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1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT RUNTIME COMPONENTS --
4 -- --
5 -- G N A T . I O --
6 -- --
7 -- S p e c --
8 -- --
9 -- Copyright (C) 1995-2002 Ada Core Technologies, 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, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, 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 ------------------------------------------------------------------------------
34 -- A simple preelaborable subset of Text_IO capabilities
36 -- A simple text I/O package that can be used for simple I/O functions in
37 -- user programs as required. This package is also preelaborated, unlike
38 -- Text_IO, and can thus be with'ed by preelaborated library units.
40 -- Note that Data_Error is not raised by these subprograms for bad data.
41 -- If such checks are needed then the regular Text_IO package must be used.
43 package GNAT.IO is
44 pragma Preelaborate (IO);
46 type File_Type is limited private;
47 -- Specifies file to be used (the only possibilities are Standard_Output
48 -- and Standard_Error). There is no Create or Open facility that would
49 -- allow more general use of file names.
51 function Standard_Output return File_Type;
52 function Standard_Error return File_Type;
53 -- These functions are the only way to get File_Type values
55 procedure Get (X : out Integer);
56 procedure Get (C : out Character);
57 procedure Get_Line (Item : out String; Last : out Natural);
58 -- These routines always read from Standard_Input
60 procedure Put (File : File_Type; X : Integer);
61 procedure Put (X : Integer);
62 -- Output integer to specified file, or to current output file, same
63 -- output as if Ada.Text_IO.Integer_IO had been instantiated for Integer.
65 procedure Put (File : File_Type; C : Character);
66 procedure Put (C : Character);
67 -- Output character to specified file, or to current output file
69 procedure Put (File : File_Type; S : String);
70 procedure Put (S : String);
71 -- Output string to specified file, or to current output file
73 procedure Put_Line (File : File_Type; S : String);
74 procedure Put_Line (S : String);
75 -- Output string followed by new line to specified file, or to
76 -- current output file.
78 procedure New_Line (File : File_Type; Spacing : Positive := 1);
79 procedure New_Line (Spacing : Positive := 1);
80 -- Output new line character to specified file, or to current output file
82 procedure Set_Output (File : File_Type);
83 -- Set current output file, default is Standard_Output if no call to
84 -- Set_Output is made.
86 private
87 type File_Type is (Stdout, Stderr);
88 -- Stdout = Standard_Output, Stderr = Standard_Error
90 pragma Inline (Standard_Error);
91 pragma Inline (Standard_Output);
93 end GNAT.IO;