Atlas - SDL_power.c
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[FILE BEGIN]
1/*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2025 Sam Lantinga <[email protected]>
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#include "SDL_syspower.h"
23
24/*
25 * Returns true if we have a definitive answer.
26 * false to try next implementation.
27 */
28typedef bool (*SDL_GetPowerInfo_Impl)(SDL_PowerState *state, int *seconds,
29                                          int *percent);
30
31#ifndef SDL_POWER_DISABLED
32#ifdef SDL_POWER_HARDWIRED
33// This is for things that _never_ have a battery
34static bool SDL_GetPowerInfo_Hardwired(SDL_PowerState *state, int *seconds, int *percent)
35{
36    *seconds = -1;
37    *percent = -1;
38    *state = SDL_POWERSTATE_NO_BATTERY;
39    return true;
40}
41#endif
42
43static SDL_GetPowerInfo_Impl implementations[] = {
44#ifdef SDL_POWER_LINUX // in order of preference. More than could work.
45    SDL_GetPowerInfo_Linux_org_freedesktop_upower,
46    SDL_GetPowerInfo_Linux_sys_class_power_supply,
47    SDL_GetPowerInfo_Linux_proc_acpi,
48    SDL_GetPowerInfo_Linux_proc_apm,
49#endif
50#ifdef SDL_POWER_WINDOWS // handles Win32, Win64, PocketPC.
51    SDL_GetPowerInfo_Windows,
52#endif
53#ifdef SDL_POWER_UIKIT // handles iPhone/iPad/etc
54    SDL_GetPowerInfo_UIKit,
55#endif
56#ifdef SDL_POWER_MACOSX // handles macOS, Darwin.
57    SDL_GetPowerInfo_MacOSX,
58#endif
59#ifdef SDL_POWER_HAIKU // with BeOS euc.jp apm driver. Does this work on Haiku?
60    SDL_GetPowerInfo_Haiku,
61#endif
62#ifdef SDL_POWER_ANDROID // handles Android.
63    SDL_GetPowerInfo_Android,
64#endif
65#ifdef SDL_POWER_PSP // handles PSP.
66    SDL_GetPowerInfo_PSP,
67#endif
68#ifdef SDL_POWER_VITA // handles PSVita.
69    SDL_GetPowerInfo_VITA,
70#endif
71#ifdef SDL_POWER_N3DS // handles N3DS.
72    SDL_GetPowerInfo_N3DS,
73#endif
74#ifdef SDL_POWER_EMSCRIPTEN // handles Emscripten
75    SDL_GetPowerInfo_Emscripten,
76#endif
77
78#ifdef SDL_POWER_HARDWIRED
79    SDL_GetPowerInfo_Hardwired,
80#endif
81};
82#endif
83
84SDL_PowerState SDL_GetPowerInfo(int *seconds, int *percent)
85{
86#ifndef SDL_POWER_DISABLED
87    const int total = SDL_arraysize(implementations);
88    SDL_PowerState result = SDL_POWERSTATE_UNKNOWN;
89    int i;
90#endif
91
92    int _seconds, _percent;
93    // Make these never NULL for platform-specific implementations.
94    if (!seconds) {
95        seconds = &_seconds;
96    }
97    if (!percent) {
98        percent = &_percent;
99    }
100
101#ifndef SDL_POWER_DISABLED
102    for (i = 0; i < total; i++) {
103        if (implementations[i](&result, seconds, percent)) {
104            return result;
105        }
106    }
107#endif
108
109    // nothing was definitive.
110    *seconds = -1;
111    *percent = -1;
112    return SDL_POWERSTATE_UNKNOWN;
113}
114
[FILE END]
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