#ifndef _OWLPS_POSITIONING_POSUTIL_HH_
#define _OWLPS_POSITIONING_POSUTIL_HH_

#include <ctime>
#include <stdint.h> // <cstdint> is not C++ 98 compliant

/* Wi-Fi channel frequencies in Hz */
#define CHANNEL_1  2412
#define CHANNEL_2  2417
#define CHANNEL_3  2422
#define CHANNEL_4  2427
#define CHANNEL_5  2432
#define CHANNEL_6  2437
#define CHANNEL_7  2442
#define CHANNEL_8  2447
#define CHANNEL_9  2452
#define CHANNEL_10 2457
#define CHANNEL_11 2462
#define CHANNEL_12 2467
#define CHANNEL_13 2472
#define CHANNEL_14 2477

/// Utilitary class
class PosUtil
{
public:
  /** @name Wi-Fi */
  //@{
  /// Converts a Wi-Fi channel to the corresponding frequency in Hz
  static unsigned int channel_to_frequency(const int &channel) ;
  //@}

  /** @name Time & Dates */
  //@{
  /// Converts a struct timespec into a value in milliseconds
  static uint64_t timespec_to_ms(const struct timespec &d) ;
  /// Converts a time value in milliseconds into a struct timespec
  static struct timespec ms_to_timespec(const uint64_t &tms) ;
  /// Converts a struct timespec into a value in nanoseconds
  static uint64_t timespec_to_ns(const struct timespec &d) ;
  /// Converts a time value in nanoseconds into a struct timespec
  static struct timespec ns_to_timespec(const uint64_t &tns) ;
  //@}
} ;

#endif // _OWLPS_POSITIONING_POSUTIL_HH_