zenilib: zenilib/jni/external/sdl/src/power/windows/SDL_syspower.c Source File

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SDL_syspower.c
Go to the documentation of this file.
1 /*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2013 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_config.h"
22
23 #ifndef SDL_POWER_DISABLED
24 #if SDL_POWER_WINDOWS
25
26 #include "../../core/windows/SDL_windows.h"
27
28 #include "SDL_power.h"
29
30 SDL_bool
31 SDL_GetPowerInfo_Windows(SDL_PowerState * state, int *seconds, int *percent)
32 {
33 SYSTEM_POWER_STATUS status;
34 SDL_bool need_details = SDL_FALSE;
35
36 /* This API should exist back to Win95. */
37 if (!GetSystemPowerStatus(&status))
38 {
39 /* !!! FIXME: push GetLastError() into SDL_GetError() */
40 *state = SDL_POWERSTATE_UNKNOWN;
41 } else if (status.BatteryFlag == 0xFF) { /* unknown state */
42 *state = SDL_POWERSTATE_UNKNOWN;
43 } else if (status.BatteryFlag & (1 << 7)) { /* no battery */
44 *state = SDL_POWERSTATE_NO_BATTERY;
45 } else if (status.BatteryFlag & (1 << 3)) { /* charging */
46 *state = SDL_POWERSTATE_CHARGING;
47 need_details = SDL_TRUE;
48 } else if (status.ACLineStatus == 1) {
49 *state = SDL_POWERSTATE_CHARGED; /* on AC, not charging. */
50 need_details = SDL_TRUE;
51 } else {
52 *state = SDL_POWERSTATE_ON_BATTERY; /* not on AC. */
53 need_details = SDL_TRUE;
54 }
55
56 *percent = -1;
57 *seconds = -1;
58 if (need_details) {
59 const int pct = (int) status.BatteryLifePercent;
60 const int secs = (int) status.BatteryLifeTime;
61
62 if (pct != 255) { /* 255 == unknown */
63 *percent = (pct > 100) ? 100 : pct; /* clamp between 0%, 100% */
64 }
65 if (secs != 0xFFFFFFFF) { /* ((DWORD)-1) == unknown */
66 *seconds = secs;
67 }
68 }
69
70 return SDL_TRUE; /* always the definitive answer on Windows. */
71 }
72
73 #endif /* SDL_POWER_WINDOWS */
74 #endif /* SDL_POWER_DISABLED */
75
76 /* vi: set ts=4 sw=4 expandtab: */
SDL_bool
SDL_bool
Definition: SDL_stdinc.h:116
SDL_TRUE
Definition: SDL_stdinc.h:119
SDL_POWERSTATE_UNKNOWN
Definition: SDL_power.h:44
SDL_POWERSTATE_CHARGED
Definition: SDL_power.h:48
SDL_POWERSTATE_NO_BATTERY
Definition: SDL_power.h:46
SDL_FALSE
Definition: SDL_stdinc.h:118
SDL_GetPowerInfo_Windows
SDL_bool SDL_GetPowerInfo_Windows(SDL_PowerState *, int *, int *)
SDL_config.h
int
int
Definition: SDL_systhread.c:37
SDL_power.h
SDL_POWERSTATE_CHARGING
Definition: SDL_power.h:47
SDL_POWERSTATE_ON_BATTERY
Definition: SDL_power.h:45
SDL_PowerState
SDL_PowerState
The basic state for the system&#39;s power supply.
Definition: SDL_power.h:42