owlps/owlps-positioning/src/posutil.cc

#include "posutil.hh"
#include "posexcept.hh"



/* Wi-Fi channel frequencies in Hz */
#define CHANNEL_1  2412000000ul
#define CHANNEL_2  2417000000ul
#define CHANNEL_3  2422000000ul
#define CHANNEL_4  2427000000ul
#define CHANNEL_5  2432000000ul
#define CHANNEL_6  2437000000ul
#define CHANNEL_7  2442000000ul
#define CHANNEL_8  2447000000ul
#define CHANNEL_9  2452000000ul
#define CHANNEL_10 2457000000ul
#define CHANNEL_11 2462000000ul
#define CHANNEL_12 2467000000ul
#define CHANNEL_13 2472000000ul
#define CHANNEL_14 2477000000ul



/**
 * @param channel A IEEE 802.11 channel or frequency in Hz.
 * @return The frequency in Hz.
 * @throw malformed_input_data if \em channel is not a valid channel or
 * frequency value.
 */
unsigned long PosUtil::wifi_channel_to_hz(const unsigned long &channel)
{
  switch (channel)
    {
    case 1:
    case CHANNEL_1:
      return CHANNEL_1 ;
    case 2:
    case CHANNEL_2:
      return CHANNEL_2 ;
    case 3:
    case CHANNEL_3:
      return CHANNEL_3 ;
    case 4:
    case CHANNEL_4:
      return CHANNEL_4 ;
    case 5:
    case CHANNEL_5:
      return CHANNEL_5 ;
    case 6:
    case CHANNEL_6:
      return CHANNEL_6 ;
    case 7:
    case CHANNEL_7:
      return CHANNEL_7 ;
    case 8:
    case CHANNEL_8:
      return CHANNEL_8 ;
    case 9:
    case CHANNEL_9:
      return CHANNEL_9 ;
    case 10:
    case CHANNEL_10:
      return CHANNEL_10 ;
    case 11:
    case CHANNEL_11:
      return CHANNEL_11 ;
    case 12:
    case CHANNEL_12:
      return CHANNEL_12 ;
    case 13:
    case CHANNEL_13:
      return CHANNEL_13 ;
    case 14:
    case CHANNEL_14:
      return CHANNEL_14 ;
    }

  // Error: wrong channel value
  throw bad_channel(channel) ;
}