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SDL_syspower.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"
#ifndef SDL_POWER_DISABLED
#ifdef SDL_POWER_BEOS
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <ctype.h>
#include <drivers/Drivers.h>
/* These values are from apm.h ... */
#define APM_DEVICE_PATH "/dev/misc/apm"
#define APM_FUNC_OFFSET 0x5300
#define APM_FUNC_GET_POWER_STATUS 10
#define APM_DEVICE_ALL 1
#define APM_BIOS_CALL (B_DEVICE_OP_CODES_END + 3)
#include "SDL_power.h"
SDL_bool
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SDL_GetPowerInfo_BeOS(SDL_PowerState * state, int *seconds, int *percent)
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{
const int fd = open("/dev/misc/apm", O_RDONLY);
SDL_bool need_details = SDL_FALSE;
uint16 regs[6];
uint8 ac_status;
uint8 battery_status;
uint8 battery_flags;
uint8 battery_life;
uint32 battery_time;
if (fd == -1) {
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return SDL_FALSE; /* maybe some other method will work? */
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memset(regs, '\0', sizeof(regs));
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regs[0] = APM_FUNC_OFFSET + APM_FUNC_GET_POWER_STATUS;
regs[1] = APM_DEVICE_ALL;
rc = ioctl(fd, APM_BIOS_CALL, regs);
close(fd);
if (rc < 0) {
return SDL_FALSE;
}
ac_status = regs[1] >> 8;
battery_status = regs[1] & 0xFF;
battery_flags = regs[2] >> 8;
battery_life = regs[2] & 0xFF;
battery_time = (uint32) regs[3];
/* in theory, _something_ should be set in battery_flags, right? */
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if (battery_flags == 0x00) { /* older APM BIOS? Less fields. */
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battery_time = 0xFFFF;
if (battery_status == 0xFF) {
battery_flags = 0xFF;
} else {
battery_flags = (1 << status.battery_status);
}
}
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if ((battery_time != 0xFFFF) && (battery_time & (1 << 15))) {
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/* time is in minutes, not seconds */
battery_time = (battery_time & 0x7FFF) * 60;
}
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if (battery_flags == 0xFF) { /* unknown state */
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*state = SDL_POWERSTATE_UNKNOWN;
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} else if (battery_flags & (1 << 7)) { /* no battery */
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*state = SDL_POWERSTATE_NO_BATTERY;
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} else if (battery_flags & (1 << 3)) { /* charging */
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*state = SDL_POWERSTATE_CHARGING;
need_details = SDL_TRUE;
} else if (ac_status == 1) {
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*state = SDL_POWERSTATE_CHARGED; /* on AC, not charging. */
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need_details = SDL_TRUE;
} else {
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*state = SDL_POWERSTATE_ON_BATTERY; /* not on AC. */
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need_details = SDL_TRUE;
}
*percent = -1;
*seconds = -1;
if (need_details) {
const int pct = (int) battery_life;
const int secs = (int) battery_time;
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if (pct != 255) { /* 255 == unknown */
*percent = (pct > 100) ? 100 : pct; /* clamp between 0%, 100% */
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if (secs != 0xFFFF) { /* 0xFFFF == unknown */
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*seconds = secs;
}
}
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return SDL_TRUE; /* the definitive answer if APM driver replied. */
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}
#endif /* SDL_POWER_BEOS */
#endif /* SDL_POWER_DISABLED */
/* vi: set ts=4 sw=4 expandtab: */