gcc/m2/gm2-libs-log/Display.mod

   1 (* Display.mod provides a Logitech 3.0 compatible Display module.
   2
   3 Copyright (C) 2004-2024 Free Software Foundation, Inc.
   4 Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>.
   5
   6 This file is part of GNU Modula-2.
   7
   8 GNU Modula-2 is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 3, or (at your option)
  11 any later version.
  12
  13 GNU Modula-2 is distributed in the hope that it will be useful, but
  14 WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 General Public License for more details.
  17
  18 Under Section 7 of GPL version 3, you are granted additional
  19 permissions described in the GCC Runtime Library Exception, version
  20 3.1, as published by the Free Software Foundation.
  21
  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/>.  *)
  26
  27 IMPLEMENTATION MODULE Display ;
  28
  29 FROM FIO IMPORT StdOut, WriteChar ;
  30 FROM ASCII IMPORT EOL, nl, bs, del ;
  31
  32
  33 (*
  34    Write - display a character to the stdout.
  35            ASCII.EOL moves to the beginning of the next line.
  36            ASCII.del erases the character to the left of the cursor.
  37 *)
  38
  39 PROCEDURE Write (ch: CHAR) ;
  40 BEGIN
  41    CASE ch OF
  42
  43    EOL:   WriteChar(StdOut, nl) |
  44    del:   WriteChar(StdOut, bs) ;
  45           WriteChar(StdOut, ' ') ;
  46           WriteChar(StdOut, bs)
  47
  48    ELSE
  49       WriteChar(StdOut, ch)
  50    END
  51 END Write ;
  52
  53
  54 END Display.