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Diffstat (limited to 'gcc/ada/libgnat/s-sequio.adb')
| -rw-r--r-- | gcc/ada/libgnat/s-sequio.adb | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/gcc/ada/libgnat/s-sequio.adb b/gcc/ada/libgnat/s-sequio.adb new file mode 100644 index 0000000..b5616ae --- /dev/null +++ b/gcc/ada/libgnat/s-sequio.adb @@ -0,0 +1,165 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME COMPONENTS -- +-- -- +-- S Y S T E M . S E Q U E N T I A L _ I O -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 1992-2017, Free Software Foundation, Inc. -- +-- -- +-- GNAT is free software; you can redistribute it and/or modify it under -- +-- terms of the GNU General Public License as published by the Free Soft- -- +-- ware Foundation; either version 3, or (at your option) any later ver- -- +-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- +-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- +-- or FITNESS FOR A PARTICULAR PURPOSE. -- +-- -- +-- As a special exception under Section 7 of GPL version 3, you are granted -- +-- additional permissions described in the GCC Runtime Library Exception, -- +-- version 3.1, as published by the Free Software Foundation. -- +-- -- +-- You should have received a copy of the GNU General Public License and -- +-- a copy of the GCC Runtime Library Exception along with this program; -- +-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- +-- <http://www.gnu.org/licenses/>. -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +with System.File_IO; +with Ada.Unchecked_Deallocation; + +package body System.Sequential_IO is + + subtype AP is FCB.AFCB_Ptr; + + package FIO renames System.File_IO; + + ------------------- + -- AFCB_Allocate -- + ------------------- + + function AFCB_Allocate + (Control_Block : Sequential_AFCB) return FCB.AFCB_Ptr + is + pragma Warnings (Off, Control_Block); + + begin + return new Sequential_AFCB; + end AFCB_Allocate; + + ---------------- + -- AFCB_Close -- + ---------------- + + -- No special processing required for Sequential_IO close + + procedure AFCB_Close (File : not null access Sequential_AFCB) is + pragma Warnings (Off, File); + + begin + null; + end AFCB_Close; + + --------------- + -- AFCB_Free -- + --------------- + + procedure AFCB_Free (File : not null access Sequential_AFCB) is + + type FCB_Ptr is access all Sequential_AFCB; + + FT : FCB_Ptr := FCB_Ptr (File); + + procedure Free is new + Ada.Unchecked_Deallocation (Sequential_AFCB, FCB_Ptr); + + begin + Free (FT); + end AFCB_Free; + + ------------ + -- Create -- + ------------ + + procedure Create + (File : in out File_Type; + Mode : FCB.File_Mode := FCB.Out_File; + Name : String := ""; + Form : String := "") + is + Dummy_File_Control_Block : Sequential_AFCB; + pragma Warnings (Off, Dummy_File_Control_Block); + -- Yes, we know this is never assigned a value, only the tag + -- is used for dispatching purposes, so that's expected. + + begin + FIO.Open (File_Ptr => AP (File), + Dummy_FCB => Dummy_File_Control_Block, + Mode => Mode, + Name => Name, + Form => Form, + Amethod => 'Q', + Creat => True, + Text => False); + end Create; + + ---------- + -- Open -- + ---------- + + procedure Open + (File : in out File_Type; + Mode : FCB.File_Mode; + Name : String; + Form : String := "") + is + Dummy_File_Control_Block : Sequential_AFCB; + pragma Warnings (Off, Dummy_File_Control_Block); + -- Yes, we know this is never assigned a value, only the tag + -- is used for dispatching purposes, so that's expected. + + begin + FIO.Open (File_Ptr => AP (File), + Dummy_FCB => Dummy_File_Control_Block, + Mode => Mode, + Name => Name, + Form => Form, + Amethod => 'Q', + Creat => False, + Text => False); + end Open; + + ---------- + -- Read -- + ---------- + + -- Not used, since Sequential_IO files are not used as streams + + procedure Read + (File : in out Sequential_AFCB; + Item : out Ada.Streams.Stream_Element_Array; + Last : out Ada.Streams.Stream_Element_Offset) + is + begin + raise Program_Error; + end Read; + + ----------- + -- Write -- + ----------- + + -- Not used, since Sequential_IO files are not used as streams + + procedure Write + (File : in out Sequential_AFCB; + Item : Ada.Streams.Stream_Element_Array) + is + begin + raise Program_Error; + end Write; + +end System.Sequential_IO; |