Instead of trying to download the Type 42 glpyh metrics incrementally
[wine] / msdos / int1a.c
1 /*
2  * BIOS interrupt 1ah handler
3  *
4  * Copyright 1993 Erik Bos
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with this library; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
19  */
20
21 #include "config.h"
22 #include "wine/port.h"
23
24 #include <time.h>
25 #ifdef HAVE_SYS_TIME_H
26 # include <sys/time.h>
27 #endif
28 #include <stdlib.h>
29 #include "miscemu.h"
30 #include "wine/debug.h"
31
32 WINE_DEFAULT_DEBUG_CHANNEL(int);
33
34 #define BCD_TO_BIN(x) ((x&15) + (x>>4)*10)
35 #define BIN_TO_BCD(x) ((x%10) + ((x/10)<<4))
36
37
38 /**********************************************************************
39  *          INT1A_GetTicksSinceMidnight
40  *
41  * Return number of clock ticks since midnight.
42  */
43 DWORD INT1A_GetTicksSinceMidnight(void)
44 {
45     struct tm *bdtime;
46     struct timeval tvs;
47     time_t seconds;
48
49     /* This should give us the (approximately) correct
50      * 18.206 clock ticks per second since midnight.
51      */
52     gettimeofday( &tvs, NULL );
53     seconds = tvs.tv_sec;
54     bdtime = localtime( &seconds );
55     return (((bdtime->tm_hour * 3600 + bdtime->tm_min * 60 +
56               bdtime->tm_sec) * 18206) / 1000) +
57                   (tvs.tv_usec / 54927);
58 }
59
60
61 /**********************************************************************
62  *          INT_Int1aHandler (WPROCS.126)
63  *
64  * Handler for int 1ah
65  *     0x00 - 0x07 - date and time
66  *     0x?? - 0x?? - Microsoft Real Time Compression Interface
67  */
68 void WINAPI INT_Int1aHandler( CONTEXT86 *context )
69 {
70     time_t ltime;
71     DWORD ticks;
72     struct tm *bdtime;
73
74     switch(AH_reg(context))
75     {
76         case 0x00:
77             ticks = INT1A_GetTicksSinceMidnight();
78             SET_CX( context, HIWORD(ticks) );
79             SET_DX( context, LOWORD(ticks) );
80             SET_AX( context, 0 );  /* No midnight rollover */
81             TRACE("int1a: AH=00 -- ticks=%ld\n", ticks);
82             break;
83
84         case 0x02:
85                 ltime = time(NULL);
86                 bdtime = localtime(&ltime);
87
88                 SET_CX( context, (BIN_TO_BCD(bdtime->tm_hour)<<8) |
89                                   BIN_TO_BCD(bdtime->tm_min) );
90                 SET_DX( context, (BIN_TO_BCD(bdtime->tm_sec)<<8) );
91
92         case 0x04:
93                 ltime = time(NULL);
94                 bdtime = localtime(&ltime);
95                 SET_CX( context, (BIN_TO_BCD(bdtime->tm_year/100)<<8) |
96                                   BIN_TO_BCD((bdtime->tm_year-1900)%100) );
97                 SET_DX( context, (BIN_TO_BCD(bdtime->tm_mon)<<8) |
98                                   BIN_TO_BCD(bdtime->tm_mday) );
99                 break;
100
101                 /* setting the time,date or RTC is not allow -EB */
102         case 0x01:
103                 /* set system time */
104         case 0x03:
105                 /* set RTC time */
106         case 0x05:
107                 /* set RTC date */
108         case 0x06:
109                 /* set ALARM */
110         case 0x07:
111                 /* cancel ALARM */
112                 break;
113
114         case 0xb0: /* Microsoft Real Time Compression */
115                 switch AL_reg(context)
116                 {
117                     case 0x01:
118                         /* not present */
119                         break;
120                     default:
121                         INT_BARF(context, 0x1a);
122                 }
123                 break;
124
125         default:
126                 INT_BARF( context, 0x1a );
127     }
128 }