battery.c

/*
 * Copyright (c), MM Weiss
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification, 
 * are permitted provided that the following conditions are met:
 * 
 *     1. Redistributions of source code must retain the above copyright notice, 
 *     this list of conditions and the following disclaimer.
 *     
 *     2. Redistributions in binary form must reproduce the above copyright notice, 
 *     this list of conditions and the following disclaimer in the documentation 
 *     and/or other materials provided with the distribution.
 *     
 *     3. Neither the name of the MM Weiss nor the names of its contributors 
 *     may be used to endorse or promote products derived from this software without 
 *     specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY 
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
 * SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR 
 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * battery.c
 *
 */

#include <CoreFoundation/CoreFoundation.h>

#include <IOKit/pwr_mgt/IOPMLib.h>
#include <IOKit/pwr_mgt/IOPM.h>
#include <IOKit/ps/IOPSKeys.h>
#include <IOKit/ps/IOPowerSources.h>

int main(void)
{
	int i, b;
	CFIndex cnt;
	CFArrayRef psl;
	CFDictionaryRef d;
	CFTypeRef w, psi, v;
	
	psi = IOPSCopyPowerSourcesInfo();
	psl = IOPSCopyPowerSourcesList(psi);
	
#if 0
	CFShow(IOPSCopyPowerSourcesInfo());
#endif
	
	if(0 < (cnt = CFArrayGetCount(psl)))
	{
		b = 0;
		for(i = 0; i < cnt; i++)
		{
			w = CFArrayGetValueAtIndex(psl, i);
			d = IOPSGetPowerSourceDescription(psi, w);
			if(d != nil) {
				v = CFDictionaryGetValue(d, CFSTR("Current Capacity"));
				if(v != nil) {
					if(!CFNumberGetValue(v, kCFNumberSInt32Type, &b)) { b = 100; } break;
				}
			}
		}
		
		printf("b = %d / 100\n", b);
		
		if(psl)
			CFRelease(psl);
		if(psi)
			CFRelease(psi);
	} else {
		puts("Power Sources Info is empty");
	}
	
	return EXIT_SUCCESS;
}

/* EOF */