apm.c

wifi 无线网络路由协议OLSR linux下C代码

/*
 * The olsr.org Optimized Link-State Routing daemon (olsrd)
 * Copyright (c) 2004, Thomas Lopatic ([e-mail])
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions 
 * are met:
 *
 * * Redistributions of source code must retain the above copyright 
 *   notice, this list of conditions and the following disclaimer.
 * * 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.
 * * Neither the name of olsr.org, olsrd 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.
 *
 * Visit http://www.olsr.org for more information.
 *
 * If you find this software useful feel free to make a donation
 * to the project. For more information see the website or contact
 * the copyright holders.
 *
 * $Id: apm.c,v 1.12 2007/04/25 22:19:00 bernd67 Exp $
 */

#include "apm.h"
#include "defs.h"
#include <stdio.h>
#include <string.h>

#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#undef interface

int apm_init(void)
{
  struct olsr_apm_info ApmInfo;

  OLSR_PRINTF(3, "Initializing APM\n");

  if(apm_read(&ApmInfo) < 0)
    return -1;

  apm_printinfo(&ApmInfo);

  return 0;
}

void apm_printinfo(struct olsr_apm_info *ApmInfo)
{
  OLSR_PRINTF(5, "APM info:\n\tAC status %d\n\tBattery percentage %d%%\n\n",
	      ApmInfo->ac_line_status,
	      ApmInfo->battery_percentage);
}

int apm_read(struct olsr_apm_info *ApmInfo)
{
#if !defined WINCE
  SYSTEM_POWER_STATUS PowerStat;

  memset(ApmInfo, 0, sizeof (struct olsr_apm_info));

  if (!GetSystemPowerStatus(&PowerStat))
    return 0;

  ApmInfo->ac_line_status = (PowerStat.ACLineStatus == 1) ?
    OLSR_AC_POWERED : OLSR_BATTERY_POWERED;
    
  ApmInfo->battery_percentage = (PowerStat.BatteryLifePercent <= 100) ?
    PowerStat.BatteryLifePercent : 0;

  return 1;
#else
  return 0;
#endif
}