src/power/SDL_power.c
author Sam Lantinga
Sat, 06 Oct 2012 12:16:32 -0700
changeset 6566 dd7e57847ea9
parent 6448 64a6297a8b93
child 6885 700f1b25f77f
permissions -rw-r--r--
Add flags to the vidmode debug output
     1 /*
     2   Simple DirectMedia Layer
     3   Copyright (C) 1997-2012 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 #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_BeOS(SDL_PowerState *, int *, int *);
    37 SDL_bool SDL_GetPowerInfo_NintendoDS(SDL_PowerState *, int *, int *);
    38 SDL_bool SDL_GetPowerInfo_UIKit(SDL_PowerState *, int *, int *);
    39 SDL_bool SDL_GetPowerInfo_Android(SDL_PowerState *, int *, int *);
    40 
    41 #ifndef SDL_POWER_DISABLED
    42 #ifdef SDL_POWER_HARDWIRED
    43 /* This is for things that _never_ have a battery */
    44 static SDL_bool
    45 SDL_GetPowerInfo_Hardwired(SDL_PowerState * state, int *seconds, int *percent)
    46 {
    47     *seconds = -1;
    48     *percent = -1;
    49     *state = SDL_POWERSTATE_NO_BATTERY;
    50     return SDL_TRUE;
    51 }
    52 #endif
    53 #endif
    54 
    55 
    56 static SDL_GetPowerInfo_Impl implementations[] = {
    57 #ifndef SDL_POWER_DISABLED
    58 #ifdef SDL_POWER_LINUX          /* in order of preference. More than could work. */
    59     SDL_GetPowerInfo_Linux_proc_acpi,
    60     SDL_GetPowerInfo_Linux_proc_apm,
    61 #endif
    62 #ifdef SDL_POWER_WINDOWS        /* handles Win32, Win64, PocketPC. */
    63     SDL_GetPowerInfo_Windows,
    64 #endif
    65 #ifdef SDL_POWER_UIKIT          /* handles iPhone/iPad/etc */
    66     SDL_GetPowerInfo_UIKit,
    67 #endif
    68 #ifdef SDL_POWER_MACOSX         /* handles Mac OS X, Darwin. */
    69     SDL_GetPowerInfo_MacOSX,
    70 #endif
    71 #ifdef SDL_POWER_NINTENDODS     /* handles Nintendo DS. */
    72     SDL_GetPowerInfo_NintendoDS,
    73 #endif
    74 #ifdef SDL_POWER_BEOS           /* handles BeOS, Zeta, with euc.jp apm driver. */
    75     SDL_GetPowerInfo_BeOS,
    76 #endif
    77 #ifdef SDL_POWER_ANDROID        /* handles Android. */
    78     SDL_GetPowerInfo_Android,
    79 #endif
    80 #ifdef SDL_POWER_HARDWIRED
    81     SDL_GetPowerInfo_Hardwired,
    82 #endif
    83 #endif
    84 };
    85 
    86 SDL_PowerState
    87 SDL_GetPowerInfo(int *seconds, int *percent)
    88 {
    89     const int total = sizeof(implementations) / sizeof(implementations[0]);
    90     int _seconds, _percent;
    91     SDL_PowerState retval;
    92     int i;
    93 
    94     /* Make these never NULL for platform-specific implementations. */
    95     if (seconds == NULL) {
    96         seconds = &_seconds;
    97     }
    98 
    99     if (percent == NULL) {
   100         percent = &_percent;
   101     }
   102 
   103     for (i = 0; i < total; i++) {
   104         if (implementations[i] (&retval, seconds, percent)) {
   105             return retval;
   106         }
   107     }
   108 
   109     /* nothing was definitive. */
   110     *seconds = -1;
   111     *percent = -1;
   112     return SDL_POWERSTATE_UNKNOWN;
   113 }
   114 
   115 /* vi: set ts=4 sw=4 expandtab: */