1 ------------------------------------------------------------------------------
3 -- GNAT LIBRARY COMPONENTS --
9 -- Copyright (C) 2002-2011, AdaCore --
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- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
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 --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. --
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. --
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/>. --
27 -- GNAT was originally developed by the GNAT team at New York University. --
28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
30 ------------------------------------------------------------------------------
32 with Interfaces.C.Strings; use Interfaces.C.Strings;
34 package body GNAT.TTY is
38 procedure Check_TTY (Handle : TTY_Handle);
39 -- Check the validity of Handle. Raise Program_Error if ttys are not
40 -- supported. Raise Constraint_Error if Handle is an invalid handle.
46 procedure Allocate_TTY (Handle : out TTY_Handle) is
47 function Internal return System.Address;
48 pragma Import (C, Internal, "__gnat_new_tty");
51 if not TTY_Supported then
55 Handle.Handle := Internal;
62 procedure Check_TTY (Handle : TTY_Handle) is
64 if not TTY_Supported then
66 elsif Handle.Handle = System.Null_Address then
67 raise Constraint_Error;
75 procedure Close_TTY (Handle : in out TTY_Handle) is
76 procedure Internal (Handle : System.Address);
77 pragma Import (C, Internal, "__gnat_close_tty");
80 Internal (Handle.Handle);
81 Handle.Handle := System.Null_Address;
88 procedure Reset_TTY (Handle : TTY_Handle) is
89 procedure Internal (Handle : System.Address);
90 pragma Import (C, Internal, "__gnat_reset_tty");
93 Internal (Handle.Handle);
100 function TTY_Descriptor
101 (Handle : TTY_Handle) return GNAT.OS_Lib.File_Descriptor
104 (Handle : System.Address) return GNAT.OS_Lib.File_Descriptor;
105 pragma Import (C, Internal, "__gnat_tty_fd");
108 return Internal (Handle.Handle);
115 function TTY_Name (Handle : TTY_Handle) return String is
116 function Internal (Handle : System.Address) return chars_ptr;
117 pragma Import (C, Internal, "__gnat_tty_name");
120 return Value (Internal (Handle.Handle));
127 function TTY_Supported return Boolean is
128 function Internal return Integer;
129 pragma Import (C, Internal, "__gnat_tty_supported");
131 return Internal /= 0;