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1------------------------------------------------------------------------------
2-- --
3-- GNAT RUN-TIME COMPONENTS --
4-- --
5-- A D A . S E Q U E N T I A L _ I O . C _ S T R E A M S --
6-- --
7-- B o d y --
8-- --
4b490c1e 9-- Copyright (C) 1992-2020, Free Software Foundation, Inc. --
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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- --
748086b7 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- --
15-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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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/>. --
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26-- --
27-- GNAT was originally developed by the GNAT team at New York University. --
71ff80dc 28-- Extensive contributions were provided by Ada Core Technologies Inc. --
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29-- --
30------------------------------------------------------------------------------
31
32with Interfaces.C_Streams; use Interfaces.C_Streams;
33with System.File_IO;
34with System.File_Control_Block;
35with System.Sequential_IO;
cecaf88a 36with Ada.Unchecked_Conversion;
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37
38package body Ada.Sequential_IO.C_Streams is
39
40 package FIO renames System.File_IO;
41 package FCB renames System.File_Control_Block;
42 package SIO renames System.Sequential_IO;
43
44 subtype AP is FCB.AFCB_Ptr;
45
cecaf88a 46 function To_FCB is new Ada.Unchecked_Conversion (File_Mode, FCB.File_Mode);
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47
48 --------------
49 -- C_Stream --
50 --------------
51
52 function C_Stream (F : File_Type) return FILEs is
53 begin
54 FIO.Check_File_Open (AP (F));
55 return F.Stream;
56 end C_Stream;
57
58 ----------
59 -- Open --
60 ----------
61
62 procedure Open
63 (File : in out File_Type;
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64 Mode : File_Mode;
65 C_Stream : FILEs;
66 Form : String := "";
67 Name : String := "")
d23b8f57 68 is
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69 Dummy_File_Control_Block : SIO.Sequential_AFCB;
70 pragma Warnings (Off, Dummy_File_Control_Block);
71 -- Yes, we know this is never assigned a value, only the tag
72 -- is used for dispatching purposes, so that's expected.
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73
74 begin
75 FIO.Open (File_Ptr => AP (File),
fbf5a39b 76 Dummy_FCB => Dummy_File_Control_Block,
d23b8f57 77 Mode => To_FCB (Mode),
fbf5a39b 78 Name => Name,
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79 Form => Form,
80 Amethod => 'Q',
81 Creat => False,
82 Text => False,
83 C_Stream => C_Stream);
84 end Open;
85
86end Ada.Sequential_IO.C_Streams;