| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT LIBRARY COMPONENTS -- |
| -- -- |
| -- G N A T . T T Y -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- Copyright (C) 2002-2025, AdaCore -- |
| -- -- |
| -- 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 Interfaces.C.Strings; use Interfaces.C.Strings; |
| |
| package body GNAT.TTY is |
| |
| use System; |
| |
| procedure Check_TTY (Handle : TTY_Handle); |
| -- Check the validity of Handle. Raise Program_Error if ttys are not |
| -- supported. Raise Constraint_Error if Handle is an invalid handle. |
| |
| ------------------ |
| -- Allocate_TTY -- |
| ------------------ |
| |
| procedure Allocate_TTY (Handle : out TTY_Handle) is |
| function Internal return System.Address; |
| pragma Import (C, Internal, "__gnat_new_tty"); |
| |
| begin |
| if not TTY_Supported then |
| raise Program_Error; |
| end if; |
| |
| Handle.Handle := Internal; |
| end Allocate_TTY; |
| |
| --------------- |
| -- Check_TTY -- |
| --------------- |
| |
| procedure Check_TTY (Handle : TTY_Handle) is |
| begin |
| if not TTY_Supported then |
| raise Program_Error; |
| elsif Handle.Handle = System.Null_Address then |
| raise Constraint_Error; |
| end if; |
| end Check_TTY; |
| |
| --------------- |
| -- Close_TTY -- |
| --------------- |
| |
| procedure Close_TTY (Handle : in out TTY_Handle) is |
| procedure Internal (Handle : System.Address); |
| pragma Import (C, Internal, "__gnat_close_tty"); |
| begin |
| Check_TTY (Handle); |
| Internal (Handle.Handle); |
| Handle.Handle := System.Null_Address; |
| end Close_TTY; |
| |
| --------------- |
| -- Reset_TTY -- |
| --------------- |
| |
| procedure Reset_TTY (Handle : TTY_Handle) is |
| procedure Internal (Handle : System.Address); |
| pragma Import (C, Internal, "__gnat_reset_tty"); |
| begin |
| Check_TTY (Handle); |
| Internal (Handle.Handle); |
| end Reset_TTY; |
| |
| -------------------- |
| -- TTY_Descriptor -- |
| -------------------- |
| |
| function TTY_Descriptor |
| (Handle : TTY_Handle) return GNAT.OS_Lib.File_Descriptor |
| is |
| function Internal |
| (Handle : System.Address) return GNAT.OS_Lib.File_Descriptor; |
| pragma Import (C, Internal, "__gnat_tty_fd"); |
| begin |
| Check_TTY (Handle); |
| return Internal (Handle.Handle); |
| end TTY_Descriptor; |
| |
| -------------- |
| -- TTY_Name -- |
| -------------- |
| |
| function TTY_Name (Handle : TTY_Handle) return String is |
| function Internal (Handle : System.Address) return chars_ptr; |
| pragma Import (C, Internal, "__gnat_tty_name"); |
| begin |
| Check_TTY (Handle); |
| return Value (Internal (Handle.Handle)); |
| end TTY_Name; |
| |
| ------------------- |
| -- TTY_Supported -- |
| ------------------- |
| |
| function TTY_Supported return Boolean is |
| function Internal return Integer; |
| pragma Import (C, Internal, "__gnat_tty_supported"); |
| begin |
| return Internal /= 0; |
| end TTY_Supported; |
| |
| end GNAT.TTY; |
