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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT RUN-TIME COMPONENTS --
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4 -- --
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5 -- G N A T . I O --
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6 -- --
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7 -- S p e c --
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8 -- --
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9 -- Copyright (C) 1995-2017, AdaCore --
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10 -- --
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11 -- GNAT is free software; you can redistribute it and/or modify it under --
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12 -- terms of the GNU General Public License as published by the Free Soft- --
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13 -- ware Foundation; either version 3, or (at your option) any later ver- --
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14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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16 -- or FITNESS FOR A PARTICULAR PURPOSE. --
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17 -- --
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18 -- As a special exception under Section 7 of GPL version 3, you are granted --
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19 -- additional permissions described in the GCC Runtime Library Exception, --
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20 -- version 3.1, as published by the Free Software Foundation. --
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21 -- --
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22 -- You should have received a copy of the GNU General Public License and --
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23 -- a copy of the GCC Runtime Library Exception along with this program; --
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24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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25 -- <http://www.gnu.org/licenses/>. --
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26 -- --
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27 -- GNAT was originally developed by the GNAT team at New York University. --
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28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
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29 -- --
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30 ------------------------------------------------------------------------------
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31
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32 -- A simple preelaborable subset of Text_IO capabilities
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33
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34 -- A simple text I/O package that can be used for simple I/O functions in
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35 -- user programs as required. This package is also preelaborated, unlike
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36 -- Text_IO, and can thus be with'ed by preelaborated library units.
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37
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38 -- Note that Data_Error is not raised by these subprograms for bad data.
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39 -- If such checks are needed then the regular Text_IO package must be used.
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40
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41 package GNAT.IO is
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42 pragma Preelaborate;
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43
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44 type File_Type is limited private;
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45 -- Specifies file to be used (the only possibilities are Standard_Output
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46 -- and Standard_Error). There is no Create or Open facility that would
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47 -- allow more general use of file names.
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48
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49 function Standard_Output return File_Type;
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50 function Standard_Error return File_Type;
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51 -- These functions are the only way to get File_Type values
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52
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53 procedure Get (X : out Integer);
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54 procedure Get (C : out Character);
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55 procedure Get_Line (Item : out String; Last : out Natural);
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56 -- These routines always read from Standard_Input
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57
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58 procedure Put (File : File_Type; X : Integer);
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59 procedure Put (X : Integer);
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60 -- Output integer to specified file, or to current output file, same
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61 -- output as if Ada.Text_IO.Integer_IO had been instantiated for Integer.
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62
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63 procedure Put (File : File_Type; C : Character);
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64 procedure Put (C : Character);
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65 -- Output character to specified file, or to current output file
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66
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67 procedure Put (File : File_Type; S : String);
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68 procedure Put (S : String);
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69 -- Output string to specified file, or to current output file
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70
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71 procedure Put_Line (File : File_Type; S : String);
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72 procedure Put_Line (S : String);
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73 -- Output string followed by new line to specified file, or to
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74 -- current output file.
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75
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76 procedure New_Line (File : File_Type; Spacing : Positive := 1);
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77 procedure New_Line (Spacing : Positive := 1);
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78 -- Output new line character to specified file, or to current output file
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79
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80 procedure Set_Output (File : File_Type);
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81 -- Set current output file, default is Standard_Output if no call to
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82 -- Set_Output is made.
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83
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84 private
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85 type File_Type is (Stdout, Stderr);
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86 -- Stdout = Standard_Output, Stderr = Standard_Error
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87
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88 pragma Inline (Standard_Error);
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89 pragma Inline (Standard_Output);
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90
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91 end GNAT.IO;
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