src/power/SDL_power.c
author Sam Lantinga <slouken@libsdl.org>
Sun, 12 Nov 2017 10:59:05 -0800
changeset 11701 d131f3193794
parent 11043 5be3faa49e54
child 11811 5d94cb6b24d3
permissions -rw-r--r--
Fixed Android build error on older SDK
     1 /*
     2   Simple DirectMedia Layer
     3   Copyright (C) 1997-2017 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 #include "SDL_power.h"
    23 #include "SDL_syspower.h"
    24 
    25 /*
    26  * Returns SDL_TRUE if we have a definitive answer.
    27  * SDL_FALSE to try next implementation.
    28  */
    29 typedef SDL_bool
    30     (*SDL_GetPowerInfo_Impl) (SDL_PowerState * state, int *seconds,
    31                               int *percent);
    32 
    33 #ifndef SDL_POWER_DISABLED
    34 #ifdef SDL_POWER_HARDWIRED
    35 /* This is for things that _never_ have a battery */
    36 static SDL_bool
    37 SDL_GetPowerInfo_Hardwired(SDL_PowerState * state, int *seconds, int *percent)
    38 {
    39     *seconds = -1;
    40     *percent = -1;
    41     *state = SDL_POWERSTATE_NO_BATTERY;
    42     return SDL_TRUE;
    43 }
    44 #endif
    45 #endif
    46 
    47 
    48 static SDL_GetPowerInfo_Impl implementations[] = {
    49 #ifndef SDL_POWER_DISABLED
    50 #ifdef SDL_POWER_LINUX          /* in order of preference. More than could work. */
    51     SDL_GetPowerInfo_Linux_org_freedesktop_upower,
    52     SDL_GetPowerInfo_Linux_sys_class_power_supply,
    53     SDL_GetPowerInfo_Linux_proc_acpi,
    54     SDL_GetPowerInfo_Linux_proc_apm,
    55 #endif
    56 #ifdef SDL_POWER_WINDOWS        /* handles Win32, Win64, PocketPC. */
    57     SDL_GetPowerInfo_Windows,
    58 #endif
    59 #ifdef SDL_POWER_UIKIT          /* handles iPhone/iPad/etc */
    60     SDL_GetPowerInfo_UIKit,
    61 #endif
    62 #ifdef SDL_POWER_MACOSX         /* handles Mac OS X, Darwin. */
    63     SDL_GetPowerInfo_MacOSX,
    64 #endif
    65 #ifdef SDL_POWER_HAIKU          /* with BeOS euc.jp apm driver. Does this work on Haiku? */
    66     SDL_GetPowerInfo_Haiku,
    67 #endif
    68 #ifdef SDL_POWER_ANDROID        /* handles Android. */
    69     SDL_GetPowerInfo_Android,
    70 #endif
    71 #ifdef SDL_POWER_PSP        /* handles PSP. */
    72     SDL_GetPowerInfo_PSP,
    73 #endif
    74 #ifdef SDL_POWER_WINRT          /* handles WinRT */
    75     SDL_GetPowerInfo_WinRT,
    76 #endif
    77 #ifdef SDL_POWER_EMSCRIPTEN     /* handles Emscripten */
    78     SDL_GetPowerInfo_Emscripten,
    79 #endif
    80 
    81 #ifdef SDL_POWER_HARDWIRED
    82     SDL_GetPowerInfo_Hardwired,
    83 #endif
    84 #endif
    85 };
    86 
    87 SDL_PowerState
    88 SDL_GetPowerInfo(int *seconds, int *percent)
    89 {
    90     const int total = sizeof(implementations) / sizeof(implementations[0]);
    91     int _seconds, _percent;
    92     SDL_PowerState retval = SDL_POWERSTATE_UNKNOWN;
    93     int i;
    94 
    95     /* Make these never NULL for platform-specific implementations. */
    96     if (seconds == NULL) {
    97         seconds = &_seconds;
    98     }
    99 
   100     if (percent == NULL) {
   101         percent = &_percent;
   102     }
   103 
   104     for (i = 0; i < total; i++) {
   105         if (implementations[i](&retval, seconds, percent)) {
   106             return retval;
   107         }
   108     }
   109 
   110     /* nothing was definitive. */
   111     *seconds = -1;
   112     *percent = -1;
   113     return SDL_POWERSTATE_UNKNOWN;
   114 }
   115 
   116 /* vi: set ts=4 sw=4 expandtab: */