util.hpp File Reference

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Detailed Description

Auxiliary constants and functions.

This header file contains declaration of the some useful constants and auxiliary functions.

Author:

Sergey Polichnoy

Go to the source code of this file.

Namespaces

• namespace omni
• namespace omni::util

Constants

• const double SQRT2

  Square root of 2.
  

• const double SQRT3

  Square root of 3.
  

• const double LG2

  Decimal logarithm of 2.
  

• const double LN2

  Natural logarithm of 2.
  

• const double PI

  The Pi value.
  

Conversions

• double deg2rad (double deg)

  Convert degrees to the radians.
  

• double rad2deg (double rad)

  Convert radians to the degrees.
  

• double dB2line (double dB)

  Convert dB to the value in linear scale.
  

• double line2dB (double L)

  Convert value in linear scale to the dB.
  

• double dBm2watt (double dBm)

  Convert dBm to the watts.
  

• double watt2dBm (double W)

  Convert watts to the dBm.
  

• double kph2mps (double kph)

  Convert kph to the mps.
  

• double mps2kph (double mps)

  Convert mps to the kph.
  

Power of two and parity

• template<typename T> bool is_ipow2 (T x)

  Is integer power of two?
  

• template<typename T> T log2 (T x)

  Binary integer logarithm.
  

• template<typename T> T flp2 (T x)

  Nearest (floor) integer power of two.
  

• template<typename T> T clp2 (T x)

  Nearest (ceil) integer power of two.
  

• template<typename T> T parity (T x)

  Parity bit.
  

Bits packing/unpacking and flip

• template<typename T, typename In> T bi2de_msb (In first, size_t Nbits, T x=T())

  Binary to decimal (MSB first).
  

• template<typename T, typename Out> Out de2bi_msb (T x, size_t Nbits, Out first)

  Decimal to binary (MSB first).
  

• template<typename T, typename In> T bi2de_lsb (In first, size_t Nbits, T x=T())

  Binary to decimal (LSB first).
  

• template<typename T, typename Out> Out de2bi_lsb (T x, size_t Nbits, Out first)

  Decimal to binary (LSB first).
  

• template<typename T> T bits_flip (T x, size_t Nbits)

  Reverse the bit order.
  

Polynomials

• template<typename TY, typename TX, typename Bi> TY poly (const TX &x, Bi first, Bi last, const TY &)

  Calculate the polynomial's function.
  

• template<typename T, typename Bi> T poly (const T &x, Bi first, Bi last)

  Calculate the polynomial's function.
  

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