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SDL_power.c
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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2009 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
#include "SDL_power.h"
/*
* Returns SDL_TRUE if we have a definitive answer.
* SDL_FALSE to try next implementation.
*/
typedef SDL_bool
(*SDL_GetPowerInfo_Impl)(SDL_PowerState *state, int *seconds, int *percent);
SDL_bool SDL_GetPowerInfo_Linux_sys_power(SDL_PowerState*, int*, int*);
SDL_bool SDL_GetPowerInfo_Linux_proc_apci(SDL_PowerState*, int*, int*);
SDL_bool SDL_GetPowerInfo_Linux_proc_apm(SDL_PowerState*, int*, int*);
SDL_bool SDL_GetPowerInfo_Windows(SDL_PowerState*, int*, int*);
SDL_bool SDL_GetPowerInfo_MacOSX(SDL_PowerState*, int*, int*);
SDL_bool SDL_GetPowerInfo_OS2(SDL_PowerState*, int*, int*);
SDL_bool SDL_GetPowerInfo_NintendoDS(SDL_PowerState*, int*, int*);
#ifndef SDL_POWER_DISABLED
#ifdef SDL_POWER_HARDWIRED
/* This is for things that _never_ have a battery, like the Dreamcast, etc. */
static SDL_bool
SDL_GetPowerInfo_Hardwired(SDL_PowerState *state, int *seconds, int *percent)
{
*seconds = -1;
*percent = -1;
*state = SDL_POWERSTATE_NO_BATTERY;
return SDL_TRUE;
}
#endif
#endif
static SDL_GetPowerInfo_Impl implementations[] = {
#ifndef SDL_POWER_DISABLED
#ifdef SDL_POWER_LINUX /* in order of preference. More than could work. */
SDL_GetPowerInfo_Linux_sys_power,
SDL_GetPowerInfo_Linux_proc_apci,
SDL_GetPowerInfo_Linux_proc_apm,
#endif
#ifdef SDL_POWER_WINDOWS /* handles Win32, Win64, PocketPC. */
SDL_GetPowerInfo_Windows,
#endif
#ifdef SDL_POWER_MACOSX /* handles Mac OS X, Darwin, iPhone. */
SDL_GetPowerInfo_MacOSX,
#endif
#ifdef SDL_POWER_OS2 /* handles OS/2, Warp, eComStation. */
SDL_GetPowerInfo_OS2,
#endif
#ifdef SDL_POWER_NINTENDODS /* handles Nintendo DS. */
SDL_GetPowerInfo_NintendoDS,
#endif
#ifdef SDL_POWER_HARDWIRED
SDL_GetPowerInfo_Hardwired,
#endif
#endif
};
SDL_PowerState
SDL_GetPowerInfo(int *seconds, int *percent)
{
const int total = sizeof (implementations) / sizeof (implementations[0]);
int _seconds, _percent;
SDL_PowerState retval;
int i;
/* Make these never NULL for platform-specific implementations. */
if (seconds == NULL) {
seconds = &_seconds;
}
if (percent == NULL) {
percent = &_percent;
}
for (i = 0; i < total; i++) {
if (implementations[i](&retval, seconds, percent)) {
return retval;
}
}
/* nothing was definitive. */
*seconds = -1;
*percent = -1;
return SDL_POWERSTATE_UNKNOWN;
}
/* vi: set ts=4 sw=4 expandtab: */