1 /*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
4
5 This software is provided 'as-is', without any express or implied
6 warranty. In no event will the authors be held liable for any damages
7 arising from the use of this software.
8
9 Permission is granted to anyone to use this software for any purpose,
10 including commercial applications, and to alter it and redistribute it
11 freely, subject to the following restrictions:
12
13 1. The origin of this software must not be misrepresented; you must not
14 claim that you wrote the original software. If you use this software
15 in a product, an acknowledgment in the product documentation would be
16 appreciated but is not required.
17 2. Altered source versions must be plainly marked as such, and must not be
18 misrepresented as being the original software.
19 3. This notice may not be removed or altered from any source distribution.
20 */
21 #include "../../SDL_internal.h"
22
23 #ifndef SDL_POWER_DISABLED
24 #if SDL_POWER_MACOSX
25
26 #include <CoreFoundation/CoreFoundation.h>
27 #include <IOKit/ps/IOPowerSources.h>
28 #include <IOKit/ps/IOPSKeys.h>
29
30 #include "SDL_power.h"
31
32 /* CoreFoundation is so verbose... */
33 #define STRMATCH(a,b) (CFStringCompare(a, b, 0) == kCFCompareEqualTo)
34 #define GETVAL(k,v) \
35 CFDictionaryGetValueIfPresent(dict, CFSTR(k), (const void **) v)
36
37 /* Note that AC power sources also include a laptop battery it is charging. */
38 static void
checkps(CFDictionaryRef dict,SDL_bool * have_ac,SDL_bool * have_battery,SDL_bool * charging,int * seconds,int * percent)39 checkps(CFDictionaryRef dict, SDL_bool * have_ac, SDL_bool * have_battery,
40 SDL_bool * charging, int *seconds, int *percent)
41 {
42 CFStringRef strval; /* don't CFRelease() this. */
43 CFBooleanRef bval;
44 CFNumberRef numval;
45 SDL_bool charge = SDL_FALSE;
46 SDL_bool choose = SDL_FALSE;
47 SDL_bool is_ac = SDL_FALSE;
48 int secs = -1;
49 int maxpct = -1;
50 int pct = -1;
51
52 if ((GETVAL(kIOPSIsPresentKey, &bval)) && (bval == kCFBooleanFalse)) {
53 return; /* nothing to see here. */
54 }
55
56 if (!GETVAL(kIOPSPowerSourceStateKey, &strval)) {
57 return;
58 }
59
60 if (STRMATCH(strval, CFSTR(kIOPSACPowerValue))) {
61 is_ac = *have_ac = SDL_TRUE;
62 } else if (!STRMATCH(strval, CFSTR(kIOPSBatteryPowerValue))) {
63 return; /* not a battery? */
64 }
65
66 if ((GETVAL(kIOPSIsChargingKey, &bval)) && (bval == kCFBooleanTrue)) {
67 charge = SDL_TRUE;
68 }
69
70 if (GETVAL(kIOPSMaxCapacityKey, &numval)) {
71 SInt32 val = -1;
72 CFNumberGetValue(numval, kCFNumberSInt32Type, &val);
73 if (val > 0) {
74 *have_battery = SDL_TRUE;
75 maxpct = (int) val;
76 }
77 }
78
79 if (GETVAL(kIOPSMaxCapacityKey, &numval)) {
80 SInt32 val = -1;
81 CFNumberGetValue(numval, kCFNumberSInt32Type, &val);
82 if (val > 0) {
83 *have_battery = SDL_TRUE;
84 maxpct = (int) val;
85 }
86 }
87
88 if (GETVAL(kIOPSTimeToEmptyKey, &numval)) {
89 SInt32 val = -1;
90 CFNumberGetValue(numval, kCFNumberSInt32Type, &val);
91
92 /* Mac OS X reports 0 minutes until empty if you're plugged in. :( */
93 if ((val == 0) && (is_ac)) {
94 val = -1; /* !!! FIXME: calc from timeToFull and capacity? */
95 }
96
97 secs = (int) val;
98 if (secs > 0) {
99 secs *= 60; /* value is in minutes, so convert to seconds. */
100 }
101 }
102
103 if (GETVAL(kIOPSCurrentCapacityKey, &numval)) {
104 SInt32 val = -1;
105 CFNumberGetValue(numval, kCFNumberSInt32Type, &val);
106 pct = (int) val;
107 }
108
109 if ((pct > 0) && (maxpct > 0)) {
110 pct = (int) ((((double) pct) / ((double) maxpct)) * 100.0);
111 }
112
113 if (pct > 100) {
114 pct = 100;
115 }
116
117 /*
118 * We pick the battery that claims to have the most minutes left.
119 * (failing a report of minutes, we'll take the highest percent.)
120 */
121 if ((secs < 0) && (*seconds < 0)) {
122 if ((pct < 0) && (*percent < 0)) {
123 choose = SDL_TRUE; /* at least we know there's a battery. */
124 }
125 if (pct > *percent) {
126 choose = SDL_TRUE;
127 }
128 } else if (secs > *seconds) {
129 choose = SDL_TRUE;
130 }
131
132 if (choose) {
133 *seconds = secs;
134 *percent = pct;
135 *charging = charge;
136 }
137 }
138
139 #undef GETVAL
140 #undef STRMATCH
141
142
143 SDL_bool
SDL_GetPowerInfo_MacOSX(SDL_PowerState * state,int * seconds,int * percent)144 SDL_GetPowerInfo_MacOSX(SDL_PowerState * state, int *seconds, int *percent)
145 {
146 CFTypeRef blob = IOPSCopyPowerSourcesInfo();
147
148 *seconds = -1;
149 *percent = -1;
150 *state = SDL_POWERSTATE_UNKNOWN;
151
152 if (blob != NULL) {
153 CFArrayRef list = IOPSCopyPowerSourcesList(blob);
154 if (list != NULL) {
155 /* don't CFRelease() the list items, or dictionaries! */
156 SDL_bool have_ac = SDL_FALSE;
157 SDL_bool have_battery = SDL_FALSE;
158 SDL_bool charging = SDL_FALSE;
159 const CFIndex total = CFArrayGetCount(list);
160 CFIndex i;
161 for (i = 0; i < total; i++) {
162 CFTypeRef ps = (CFTypeRef) CFArrayGetValueAtIndex(list, i);
163 CFDictionaryRef dict =
164 IOPSGetPowerSourceDescription(blob, ps);
165 if (dict != NULL) {
166 checkps(dict, &have_ac, &have_battery, &charging,
167 seconds, percent);
168 }
169 }
170
171 if (!have_battery) {
172 *state = SDL_POWERSTATE_NO_BATTERY;
173 } else if (charging) {
174 *state = SDL_POWERSTATE_CHARGING;
175 } else if (have_ac) {
176 *state = SDL_POWERSTATE_CHARGED;
177 } else {
178 *state = SDL_POWERSTATE_ON_BATTERY;
179 }
180
181 CFRelease(list);
182 }
183 CFRelease(blob);
184 }
185
186 return SDL_TRUE; /* always the definitive answer on Mac OS X. */
187 }
188
189 #endif /* SDL_POWER_MACOSX */
190 #endif /* SDL_POWER_DISABLED */
191
192 /* vi: set ts=4 sw=4 expandtab: */
193