SDL_syspower.c
1
2
/*
Simple DirectMedia Layer
3
Copyright (C) 1997-2017 Sam Lantinga <slouken@libsdl.org>
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
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../../SDL_internal.h"
#ifndef SDL_POWER_DISABLED
#if SDL_POWER_MACOSX
#include <CoreFoundation/CoreFoundation.h>
#include <IOKit/ps/IOPowerSources.h>
#include <IOKit/ps/IOPSKeys.h>
#include "SDL_power.h"
/* CoreFoundation is so verbose... */
#define STRMATCH(a,b) (CFStringCompare(a, b, 0) == kCFCompareEqualTo)
#define GETVAL(k,v) \
CFDictionaryGetValueIfPresent(dict, CFSTR(k), (const void **) v)
/* Note that AC power sources also include a laptop battery it is charging. */
static void
checkps(CFDictionaryRef dict, SDL_bool * have_ac, SDL_bool * have_battery,
SDL_bool * charging, int *seconds, int *percent)
{
CFStringRef strval; /* don't CFRelease() this. */
CFBooleanRef bval;
CFNumberRef numval;
SDL_bool charge = SDL_FALSE;
SDL_bool choose = SDL_FALSE;
SDL_bool is_ac = SDL_FALSE;
int secs = -1;
int maxpct = -1;
int pct = -1;
if ((GETVAL(kIOPSIsPresentKey, &bval)) && (bval == kCFBooleanFalse)) {
return; /* nothing to see here. */
}
if (!GETVAL(kIOPSPowerSourceStateKey, &strval)) {
return;
}
if (STRMATCH(strval, CFSTR(kIOPSACPowerValue))) {
is_ac = *have_ac = SDL_TRUE;
} else if (!STRMATCH(strval, CFSTR(kIOPSBatteryPowerValue))) {
return; /* not a battery? */
}
if ((GETVAL(kIOPSIsChargingKey, &bval)) && (bval == kCFBooleanTrue)) {
charge = SDL_TRUE;
}
if (GETVAL(kIOPSMaxCapacityKey, &numval)) {
SInt32 val = -1;
CFNumberGetValue(numval, kCFNumberSInt32Type, &val);
if (val > 0) {
*have_battery = SDL_TRUE;
maxpct = (int) val;
}
}
if (GETVAL(kIOPSMaxCapacityKey, &numval)) {
SInt32 val = -1;
CFNumberGetValue(numval, kCFNumberSInt32Type, &val);
if (val > 0) {
*have_battery = SDL_TRUE;
maxpct = (int) val;
}
}
if (GETVAL(kIOPSTimeToEmptyKey, &numval)) {
SInt32 val = -1;
CFNumberGetValue(numval, kCFNumberSInt32Type, &val);
/* Mac OS X reports 0 minutes until empty if you're plugged in. :( */
if ((val == 0) && (is_ac)) {
val = -1; /* !!! FIXME: calc from timeToFull and capacity? */
}
secs = (int) val;
if (secs > 0) {
secs *= 60; /* value is in minutes, so convert to seconds. */
}
}
if (GETVAL(kIOPSCurrentCapacityKey, &numval)) {
SInt32 val = -1;
CFNumberGetValue(numval, kCFNumberSInt32Type, &val);
pct = (int) val;
}
if ((pct > 0) && (maxpct > 0)) {
pct = (int) ((((double) pct) / ((double) maxpct)) * 100.0);
}
if (pct > 100) {
pct = 100;
}
/*
* We pick the battery that claims to have the most minutes left.
* (failing a report of minutes, we'll take the highest percent.)
*/
if ((secs < 0) && (*seconds < 0)) {
if ((pct < 0) && (*percent < 0)) {
choose = SDL_TRUE; /* at least we know there's a battery. */
}
if (pct > *percent) {
choose = SDL_TRUE;
}
} else if (secs > *seconds) {
choose = SDL_TRUE;
}
if (choose) {
*seconds = secs;
*percent = pct;
*charging = charge;
}
}
#undef GETVAL
#undef STRMATCH
SDL_bool
SDL_GetPowerInfo_MacOSX(SDL_PowerState * state, int *seconds, int *percent)
{
CFTypeRef blob = IOPSCopyPowerSourcesInfo();
*seconds = -1;
*percent = -1;
*state = SDL_POWERSTATE_UNKNOWN;
if (blob != NULL) {
CFArrayRef list = IOPSCopyPowerSourcesList(blob);
if (list != NULL) {
/* don't CFRelease() the list items, or dictionaries! */
SDL_bool have_ac = SDL_FALSE;
SDL_bool have_battery = SDL_FALSE;
SDL_bool charging = SDL_FALSE;
const CFIndex total = CFArrayGetCount(list);
CFIndex i;
for (i = 0; i < total; i++) {
CFTypeRef ps = (CFTypeRef) CFArrayGetValueAtIndex(list, i);
CFDictionaryRef dict =
IOPSGetPowerSourceDescription(blob, ps);
if (dict != NULL) {
checkps(dict, &have_ac, &have_battery, &charging,
seconds, percent);
}
}
if (!have_battery) {
*state = SDL_POWERSTATE_NO_BATTERY;
} else if (charging) {
*state = SDL_POWERSTATE_CHARGING;
} else if (have_ac) {
*state = SDL_POWERSTATE_CHARGED;
} else {
*state = SDL_POWERSTATE_ON_BATTERY;
}
CFRelease(list);
}
CFRelease(blob);
}
return SDL_TRUE; /* always the definitive answer on Mac OS X. */
}
#endif /* SDL_POWER_MACOSX */
#endif /* SDL_POWER_DISABLED */
/* vi: set ts=4 sw=4 expandtab: */