1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
|
(* RTgen.def provide a generic device interface used by ISO.
Copyright (C) 2008-2023 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/>. *)
DEFINITION MODULE RTgen ;
(*
Title : RTgen
Author : Gaius Mulley
System : GNU Modula-2
Date : Mon Sep 22 18:15:35 2008
Revision : $Version$
Description: provides a generic device interface between
ISO channels and the underlying PIM style
FIO procedure calls.
*)
FROM RTgenif IMPORT GenDevIF ;
FROM IOLink IMPORT DeviceId, DeviceTablePtr;
FROM IOConsts IMPORT ReadResults ;
FROM SYSTEM IMPORT ADDRESS ;
TYPE
ChanDev ;
DeviceType = (seqfile, streamfile, programargs, stdchans, term, socket, rndfile) ;
(*
InitChanDev - initialize and return a ChanDev.
*)
PROCEDURE InitChanDev (t: DeviceType; d: DeviceId; g: GenDevIF) : ChanDev ;
(*
KillChanDev - deallocates, g.
*)
PROCEDURE KillChanDev (g: GenDevIF) : GenDevIF ;
(*
RaiseEOFinLook - returns TRUE if the Look procedure
should raise an exception if it
sees end of file.
*)
PROCEDURE RaiseEOFinLook (g: ChanDev) : BOOLEAN ;
(*
RaiseEOFinSkip - returns TRUE if the Skip procedure
should raise an exception if it
sees end of file.
*)
PROCEDURE RaiseEOFinSkip (g: ChanDev) : BOOLEAN ;
PROCEDURE doLook (g: ChanDev;
d: DeviceTablePtr;
VAR ch: CHAR;
VAR r: ReadResults) ;
PROCEDURE doSkip (g: ChanDev;
d: DeviceTablePtr) ;
PROCEDURE doSkipLook (g: ChanDev;
d: DeviceTablePtr;
VAR ch: CHAR;
VAR r: ReadResults) ;
PROCEDURE doWriteLn (g: ChanDev;
d: DeviceTablePtr) ;
PROCEDURE doReadText (g: ChanDev;
d: DeviceTablePtr;
to: ADDRESS;
maxChars: CARDINAL;
VAR charsRead: CARDINAL) ;
PROCEDURE doWriteText (g: ChanDev;
d: DeviceTablePtr;
from: ADDRESS;
charsToWrite: CARDINAL) ;
PROCEDURE doReadLocs (g: ChanDev;
d: DeviceTablePtr;
to: ADDRESS;
maxLocs: CARDINAL;
VAR locsRead: CARDINAL) ;
PROCEDURE doWriteLocs (g: ChanDev;
d: DeviceTablePtr;
from: ADDRESS;
locsToWrite: CARDINAL) ;
(*
checkErrno - checks a number of errno conditions and raises
appropriate ISO exceptions if they occur.
*)
PROCEDURE checkErrno (g: ChanDev; d: DeviceTablePtr) ;
END RTgen.
|
