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comparison src/power/beos/SDL_syspower.c @ 3173:510e3f36c04a

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BeOS support for power subsystem.
author Ryan C. Gordon <icculus@icculus.org>
date Sun, 07 Jun 2009 22:44:59 +0000
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children 51750b7a966f
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3172:f0191bd9f99c 3173:510e3f36c04a
1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997-2009 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with this library; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18
19 Sam Lantinga
20 slouken@libsdl.org
21 */
22 #include "SDL_config.h"
23
24 #ifndef SDL_POWER_DISABLED
25 #ifdef SDL_POWER_BEOS
26
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <unistd.h>
30 #include <fcntl.h>
31 #include <ctype.h>
32 #include <drivers/Drivers.h>
33
34 /* These values are from apm.h ... */
35 #define APM_DEVICE_PATH "/dev/misc/apm"
36 #define APM_FUNC_OFFSET 0x5300
37 #define APM_FUNC_GET_POWER_STATUS 10
38 #define APM_DEVICE_ALL 1
39 #define APM_BIOS_CALL (B_DEVICE_OP_CODES_END + 3)
40
41 #include "SDL_power.h"
42
43 SDL_bool
44 SDL_GetPowerInfo_BeOS(SDL_PowerState *state, int *seconds, int *percent)
45 {
46 const int fd = open("/dev/misc/apm", O_RDONLY);
47 SDL_bool need_details = SDL_FALSE;
48 uint16 regs[6];
49 uint8 ac_status;
50 uint8 battery_status;
51 uint8 battery_flags;
52 uint8 battery_life;
53 uint32 battery_time;
54
55 if (fd == -1) {
56 return SDL_FALSE; /* maybe some other method will work? */
57 }
58
59 memset(regs, '\0', sizeof (regs));
60 regs[0] = APM_FUNC_OFFSET + APM_FUNC_GET_POWER_STATUS;
61 regs[1] = APM_DEVICE_ALL;
62 rc = ioctl(fd, APM_BIOS_CALL, regs);
63 close(fd);
64
65 if (rc < 0) {
66 return SDL_FALSE;
67 }
68
69 ac_status = regs[1] >> 8;
70 battery_status = regs[1] & 0xFF;
71 battery_flags = regs[2] >> 8;
72 battery_life = regs[2] & 0xFF;
73 battery_time = (uint32) regs[3];
74
75 /* in theory, _something_ should be set in battery_flags, right? */
76 if (battery_flags == 0x00) { /* older APM BIOS? Less fields. */
77 battery_time = 0xFFFF;
78 if (battery_status == 0xFF) {
79 battery_flags = 0xFF;
80 } else {
81 battery_flags = (1 << status.battery_status);
82 }
83 }
84
85 if ( (battery_time != 0xFFFF) && (battery_time & (1 << 15)) ) {
86 /* time is in minutes, not seconds */
87 battery_time = (battery_time & 0x7FFF) * 60;
88 }
89
90 if (battery_flags == 0xFF) { /* unknown state */
91 *state = SDL_POWERSTATE_UNKNOWN;
92 } else if (battery_flags & (1 << 7)) { /* no battery */
93 *state = SDL_POWERSTATE_NO_BATTERY;
94 } else if (battery_flags & (1 << 3)) { /* charging */
95 *state = SDL_POWERSTATE_CHARGING;
96 need_details = SDL_TRUE;
97 } else if (ac_status == 1) {
98 *state = SDL_POWERSTATE_CHARGED; /* on AC, not charging. */
99 need_details = SDL_TRUE;
100 } else {
101 *state = SDL_POWERSTATE_ON_BATTERY; /* not on AC. */
102 need_details = SDL_TRUE;
103 }
104
105 *percent = -1;
106 *seconds = -1;
107 if (need_details) {
108 const int pct = (int) battery_life;
109 const int secs = (int) battery_time;
110
111 if (pct != 255) { /* 255 == unknown */
112 *percent = (pct > 100) ? 100 : pct; /* clamp between 0%, 100% */
113 }
114 if (secs != 0xFFFF) { /* 0xFFFF == unknown */
115 *seconds = secs;
116 }
117 }
118
119 return SDL_TRUE; /* the definitive answer if APM driver replied. */
120 }
121
122 #endif /* SDL_POWER_BEOS */
123 #endif /* SDL_POWER_DISABLED */
124
125 /* vi: set ts=4 sw=4 expandtab: */
126