src/power/SDL_power.c
author David Ludwig <dludwig@pobox.com>
Wed, 12 Mar 2014 11:57:15 -0400
changeset 8611 a762dfc67e1a
parent 8149 681eb46b8ac4
child 8820 0e935d5b193a
permissions -rw-r--r--
Fixed various build and runtime errors when using WinRT with VS2012.
     1 /*
     2   Simple DirectMedia Layer
     3   Copyright (C) 1997-2014 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 
    24 /*
    25  * Returns SDL_TRUE if we have a definitive answer.
    26  * SDL_FALSE to try next implementation.
    27  */
    28 typedef SDL_bool
    29     (*SDL_GetPowerInfo_Impl) (SDL_PowerState * state, int *seconds,
    30                               int *percent);
    31 
    32 SDL_bool SDL_GetPowerInfo_Linux_proc_acpi(SDL_PowerState *, int *, int *);
    33 SDL_bool SDL_GetPowerInfo_Linux_proc_apm(SDL_PowerState *, int *, int *);
    34 SDL_bool SDL_GetPowerInfo_Windows(SDL_PowerState *, int *, int *);
    35 SDL_bool SDL_GetPowerInfo_MacOSX(SDL_PowerState *, int *, int *);
    36 SDL_bool SDL_GetPowerInfo_Haiku(SDL_PowerState *, int *, int *);
    37 SDL_bool SDL_GetPowerInfo_UIKit(SDL_PowerState *, int *, int *);
    38 SDL_bool SDL_GetPowerInfo_Android(SDL_PowerState *, int *, int *);
    39 SDL_bool SDL_GetPowerInfo_PSP(SDL_PowerState *, int *, int *);
    40 SDL_bool SDL_GetPowerInfo_WinRT(SDL_PowerState *, int *, int *);
    41 
    42 #ifndef SDL_POWER_DISABLED
    43 #ifdef SDL_POWER_HARDWIRED
    44 /* This is for things that _never_ have a battery */
    45 static SDL_bool
    46 SDL_GetPowerInfo_Hardwired(SDL_PowerState * state, int *seconds, int *percent)
    47 {
    48     *seconds = -1;
    49     *percent = -1;
    50     *state = SDL_POWERSTATE_NO_BATTERY;
    51     return SDL_TRUE;
    52 }
    53 #endif
    54 #endif
    55 
    56 
    57 static SDL_GetPowerInfo_Impl implementations[] = {
    58 #ifndef SDL_POWER_DISABLED
    59 #ifdef SDL_POWER_LINUX          /* in order of preference. More than could work. */
    60     SDL_GetPowerInfo_Linux_proc_acpi,
    61     SDL_GetPowerInfo_Linux_proc_apm,
    62 #endif
    63 #ifdef SDL_POWER_WINDOWS        /* handles Win32, Win64, PocketPC. */
    64     SDL_GetPowerInfo_Windows,
    65 #endif
    66 #ifdef SDL_POWER_UIKIT          /* handles iPhone/iPad/etc */
    67     SDL_GetPowerInfo_UIKit,
    68 #endif
    69 #ifdef SDL_POWER_MACOSX         /* handles Mac OS X, Darwin. */
    70     SDL_GetPowerInfo_MacOSX,
    71 #endif
    72 #ifdef SDL_POWER_HAIKU          /* with BeOS euc.jp apm driver. Does this work on Haiku? */
    73     SDL_GetPowerInfo_Haiku,
    74 #endif
    75 #ifdef SDL_POWER_ANDROID        /* handles Android. */
    76     SDL_GetPowerInfo_Android,
    77 #endif
    78 #ifdef SDL_POWER_PSP        /* handles PSP. */
    79     SDL_GetPowerInfo_PSP,
    80 #endif
    81 #ifdef SDL_POWER_WINRT          /* handles WinRT */
    82     SDL_GetPowerInfo_WinRT,
    83 #endif
    84 
    85 #ifdef SDL_POWER_HARDWIRED
    86     SDL_GetPowerInfo_Hardwired,
    87 #endif
    88 #endif
    89 };
    90 
    91 SDL_PowerState
    92 SDL_GetPowerInfo(int *seconds, int *percent)
    93 {
    94     const int total = sizeof(implementations) / sizeof(implementations[0]);
    95     int _seconds, _percent;
    96     SDL_PowerState retval;
    97     int i;
    98 
    99     /* Make these never NULL for platform-specific implementations. */
   100     if (seconds == NULL) {
   101         seconds = &_seconds;
   102     }
   103 
   104     if (percent == NULL) {
   105         percent = &_percent;
   106     }
   107 
   108     for (i = 0; i < total; i++) {
   109         if (implementations[i] (&retval, seconds, percent)) {
   110             return retval;
   111         }
   112     }
   113 
   114     /* nothing was definitive. */
   115     *seconds = -1;
   116     *percent = -1;
   117     return SDL_POWERSTATE_UNKNOWN;
   118 }
   119 
   120 /* vi: set ts=4 sw=4 expandtab: */