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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 -- A D A . D I R E C T _ I O . C _ S T R E A M S --
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6 -- --
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7 -- B o d y --
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8 -- --
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9 -- Copyright (C) 1992-2017, Free Software Foundation, Inc. --
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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 with Interfaces.C_Streams; use Interfaces.C_Streams;
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33 with System.File_IO;
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34 with System.File_Control_Block;
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35 with System.Direct_IO;
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36 with Ada.Unchecked_Conversion;
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37
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38 package body Ada.Direct_IO.C_Streams is
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39
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40 package FIO renames System.File_IO;
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41 package FCB renames System.File_Control_Block;
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42 package DIO renames System.Direct_IO;
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43
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44 subtype AP is FCB.AFCB_Ptr;
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45
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46 function To_FCB is new Ada.Unchecked_Conversion (File_Mode, FCB.File_Mode);
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47
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48 --------------
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49 -- C_Stream --
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50 --------------
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51
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52 function C_Stream (F : File_Type) return FILEs is
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53 begin
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54 FIO.Check_File_Open (AP (F));
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55 return F.Stream;
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56 end C_Stream;
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57
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58 ----------
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59 -- Open --
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60 ----------
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61
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62 procedure Open
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63 (File : in out File_Type;
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64 Mode : File_Mode;
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65 C_Stream : FILEs;
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66 Form : String := "";
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67 Name : String := "")
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68 is
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69 Dummy_File_Control_Block : DIO.Direct_AFCB;
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70 pragma Warnings (Off, Dummy_File_Control_Block);
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71 -- Yes, we know this is never assigned a value, only the tag
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72 -- is used for dispatching purposes, so that's expected.
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73
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74 begin
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75 FIO.Open (File_Ptr => AP (File),
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76 Dummy_FCB => Dummy_File_Control_Block,
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77 Mode => To_FCB (Mode),
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78 Name => Name,
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79 Form => Form,
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80 Amethod => 'D',
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81 Creat => False,
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82 Text => False,
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83 C_Stream => C_Stream);
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84
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85 File.Bytes := Bytes;
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86 end Open;
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87
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88 end Ada.Direct_IO.C_Streams;
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