| ------------------------------------------------------------------------------ |
| -- -- |
| -- 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) 1992-2021, 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; |
