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(* Display.mod provides a Logitech 3.0 compatible Display module.
Copyright (C) 2004-2025 Free Software Foundation, Inc.
Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>.
This file is part of GNU Modula-2.
GNU Modula-2 is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Modula-2 is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
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/>. *)
IMPLEMENTATION MODULE Display ;
FROM FIO IMPORT StdOut, WriteChar ;
FROM ASCII IMPORT EOL, nl, bs, del ;
(*
Write - display a character to the stdout.
ASCII.EOL moves to the beginning of the next line.
ASCII.del erases the character to the left of the cursor.
*)
PROCEDURE Write (ch: CHAR) ;
BEGIN
CASE ch OF
EOL: WriteChar(StdOut, nl) |
del: WriteChar(StdOut, bs) ;
WriteChar(StdOut, ' ') ;
WriteChar(StdOut, bs)
ELSE
WriteChar(StdOut, ch)
END
END Write ;
END Display.
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