git://gcc.gnu.org / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| 1eee94d3 GM |
1 | (* Termbase.def provides GNU Modula-2 with a PIM 234 compatible Termbase. |
| 2 | ||
| 83ffe9cd | 3 | Copyright (C) 2004-2023 Free Software Foundation, Inc. |
| 1eee94d3 GM |
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 | DEFINITION MODULE Termbase ; | |
| 28 | ||
| 29 | (* | |
| 30 | Initially the read routines from Keyboard and the | |
| 31 | write routine from Display is assigned to the Read, | |
| 32 | KeyPressed and Write procedures. | |
| 33 | *) | |
| 34 | ||
| 35 | EXPORT QUALIFIED ReadProcedure, StatusProcedure, WriteProcedure, | |
| 36 | AssignRead, AssignWrite, UnAssignRead, UnAssignWrite, | |
| 37 | Read, KeyPressed, Write ; | |
| 38 | ||
| 39 | TYPE | |
| 40 | ReadProcedure = PROCEDURE (VAR CHAR) ; | |
| 41 | WriteProcedure = PROCEDURE (CHAR) ; | |
| 42 | StatusProcedure = PROCEDURE () : BOOLEAN ; | |
| 43 | ||
| 44 | ||
| 45 | (* | |
| 46 | AssignRead - assigns a read procedure and status procedure for terminal | |
| 47 | input. Done is set to TRUE if successful. Subsequent | |
| 48 | Read and KeyPressed calls are mapped onto the user supplied | |
| 49 | procedures. The previous read and status procedures are | |
| 50 | uncovered and reused after UnAssignRead is called. | |
| 51 | *) | |
| 52 | ||
| 53 | PROCEDURE AssignRead (rp: ReadProcedure; sp: StatusProcedure; | |
| 54 | VAR Done: BOOLEAN) ; | |
| 55 | ||
| 56 | ||
| 57 | (* | |
| 58 | UnAssignRead - undo the last call to AssignRead and set Done to TRUE | |
| 59 | on success. | |
| 60 | *) | |
| 61 | ||
| 62 | PROCEDURE UnAssignRead (VAR Done: BOOLEAN) ; | |
| 63 | ||
| 64 | ||
| 65 | (* | |
| 66 | Read - reads a single character using the currently active read | |
| 67 | procedure. | |
| 68 | *) | |
| 69 | ||
| 70 | PROCEDURE Read (VAR ch: CHAR) ; | |
| 71 | ||
| 72 | ||
| 73 | (* | |
| 74 | KeyPressed - returns TRUE if a character is available to be read. | |
| 75 | *) | |
| 76 | ||
| 77 | PROCEDURE KeyPressed () : BOOLEAN ; | |
| 78 | ||
| 79 | ||
| 80 | (* | |
| 81 | AssignWrite - assigns a write procedure for terminal output. | |
| 82 | Done is set to TRUE if successful. Subsequent | |
| 83 | Write calls are mapped onto the user supplied | |
| 84 | procedure. The previous write procedure is | |
| 85 | uncovered and reused after UnAssignWrite is called. | |
| 86 | *) | |
| 87 | ||
| 88 | PROCEDURE AssignWrite (wp: WriteProcedure; VAR Done: BOOLEAN) ; | |
| 89 | ||
| 90 | ||
| 91 | (* | |
| 92 | UnAssignWrite - undo the last call to AssignWrite and set Done to TRUE | |
| 93 | on success. | |
| 94 | *) | |
| 95 | ||
| 96 | PROCEDURE UnAssignWrite (VAR Done: BOOLEAN) ; | |
| 97 | ||
| 98 | ||
| 99 | (* | |
| 100 | Write - writes a single character using the currently active write | |
| 101 | procedure. | |
| 102 | *) | |
| 103 | ||
| 104 | PROCEDURE Write (VAR ch: CHAR) ; | |
| 105 | ||
| 106 | ||
| 107 | END Termbase. |