| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT RUN-TIME COMPONENTS -- |
| -- -- |
| -- S Y S T E M . S E Q U E N T I A L _ I O -- |
| -- -- |
| -- S p e c -- |
| -- -- |
| -- Copyright (C) 1992-2023, 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. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| -- This package contains the declaration of the control block used for |
| -- Sequential_IO. This must be declared at the outer library level. It also |
| -- contains code that is shared between instances of Sequential_IO. |
| |
| with System.File_Control_Block; |
| with Ada.Streams; |
| |
| package System.Sequential_IO is |
| |
| package FCB renames System.File_Control_Block; |
| |
| type Sequential_AFCB is new FCB.AFCB with null record; |
| -- No additional fields required for Sequential_IO |
| |
| function AFCB_Allocate |
| (Control_Block : Sequential_AFCB) return FCB.AFCB_Ptr; |
| |
| procedure AFCB_Close (File : not null access Sequential_AFCB); |
| procedure AFCB_Free (File : not null access Sequential_AFCB); |
| |
| procedure Read |
| (File : in out Sequential_AFCB; |
| Item : out Ada.Streams.Stream_Element_Array; |
| Last : out Ada.Streams.Stream_Element_Offset); |
| -- Required overriding of Read, not actually used for Sequential_IO |
| |
| procedure Write |
| (File : in out Sequential_AFCB; |
| Item : Ada.Streams.Stream_Element_Array); |
| -- Required overriding of Write, not actually used for Sequential_IO |
| |
| type File_Type is access all Sequential_AFCB; |
| -- File_Type in individual instantiations is derived from this type |
| |
| procedure Create |
| (File : in out File_Type; |
| Mode : FCB.File_Mode := FCB.Out_File; |
| Name : String := ""; |
| Form : String := ""); |
| |
| procedure Open |
| (File : in out File_Type; |
| Mode : FCB.File_Mode; |
| Name : String; |
| Form : String := ""); |
| |
| end System.Sequential_IO; |
