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
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
|
/* $Id: os2iot.c,v 1.1.1.1 2000/05/10 14:20:51 jholder Exp $
* --------------------------------------------------------------------
* see doc/License.txt for License Information
* --------------------------------------------------------------------
*
* File name: $Id: os2iot.c,v 1.1.1.1 2000/05/10 14:20:51 jholder Exp $
*
* Description:
*
* Modification history:
* $Log: os2iot.c,v $
* Revision 1.1.1.1 2000/05/10 14:20:51 jholder
*
* imported
*
*
* --------------------------------------------------------------------
*/
/*
* os2iot.c
*
* keyboard thread for OS/2.
*
*/
/* Created by John W. Kennedy */
/* Based on pre-existing mscio.c */
/* These functions, and these alone, are maintained in a separate module so */
/* that they can be compiled with stack probes; all the other functions, */
/* running in thread 1 alone, do not need stack probes */
/* KbdCharIn is performed in a separate thread so that timed keyboard I/O */
/* (as in Border Zone) does not burn up the CPU with polling */
/* A functional change is that the cursor is forced visible during a read, */
/* which is necessary to make the forms in Bureaucracy usable */
/* In the JZIP version, 0x40000000 is added to the result when Scroll Lock is on */
#include "ztypes.h"
#define INCL_NOCOMMON
#define INCL_DOSSEMAPHORES
#define INCL_VIO
#define INCL_KBD
#define INCL_NOPMAPI
#include <os2.h>
HEV hevKbdReq, hevKbdRsp;
volatile int fKbdOpen;
volatile int iKbdChar;
static int os2_read_key_byte( void )
{
/* Use this to hold a two-byte value and return it one byte at a time */
static int iExtend = -1;
/* If we have saved the second half, return it now, and reset */
if ( iExtend >= 0 )
{
int i = iExtend;
iExtend = -1;
return i;
}
else
{
VIOCURSORINFO vci;
KBDKEYINFO kki;
SHORT sAttr;
/* If we are doing input with the cursor off, turn it on temporarily */
VioGetCurType( &vci, NULLHANDLE );
if ( ( sAttr = vci.attr ) != 0 )
{
vci.attr = 0;
VioSetCurType( &vci, NULLHANDLE );
} /* endif */
/* Do the actual read */
KbdCharIn( &kki, IO_WAIT, NULLHANDLE );
/* If we turned the cursor on, turn it off again */
if ( sAttr )
{
vci.attr = sAttr;
VioSetCurType( &vci, NULLHANDLE );
} /* endif */
/* If we received a two-byte code, save it to return the second half */
if ( kki.chChar == 0x00 || kki.chChar == 0xE0 )
{
#if defined JZIPVER
/* Add 0x40000000 to certain values to detect scroll-lock */
if ( kki.fsState & KBDSTF_SCROLLLOCK_ON )
{
switch ( kki.chScan )
{
case 'H': /* Up arrow */
case 'P': /* Down arrow */
case 'I': /* PgUp */
case 'Q': /* PgDn */
case 'K': /* Left arrow */
case 's': /* Ctrl + Left arrow */
case 'M': /* Right arrow */
case 't': /* Ctrl + Right arrow */
case 'O': /* End */
case 'G': /* Home */
case 'S': /* Delete */
iExtend = kki.chScan | 0x40000000;
break;
default:
iExtend = kki.chScan;
break;
} /* endswitch */
}
else
{
iExtend = kki.chScan;
} /* endif */
#else
iExtend = kki.chScan;
#endif
return kki.chChar;
} /* endif */
#if defined JZIPVER
/* Add 0x40000000 to certain values to detect scroll-lock */
if ( kki.fsState & KBDSTF_SCROLLLOCK_ON )
{
switch ( kki.chChar )
{
case '\x1B': /* Escape */
return kki.chChar | 0x40000000;
default:
return kki.chChar;
} /* endswitch */
}
else
{
return kki.chChar;
} /* endif */
#else
return kki.chChar;
#endif
} /* endif */
} /* os2_read_key_byte */
/* This is the actual thread process; we don't need an argument */
void os2_read_key_thread( void *p )
{
/* Unbroken loop */
for ( ;; )
{
ULONG ulPostCt;
/* Wait for a request from the main thread */
DosWaitEventSem( hevKbdReq, SEM_INDEFINITE_WAIT );
DosResetEventSem( hevKbdReq, &ulPostCt );
/* Either get a byte and post back or shut down the thread */
if ( fKbdOpen )
{
iKbdChar = os2_read_key_byte( );
DosPostEventSem( hevKbdRsp );
}
else
{
break;
} /* endif */
} /* endfor */
} /* os2_read_key_thread */
|
