GrayToInt is a bit operation conversion code snippet to convert the integer value from a Gray code. To convert a Gray code to an integer, use IntToGray.


//From http://www.richelbilderbeek.nl/CppGrayToInt.htm

//Modified from Press et al., 2002, Numerical Recipies in C++,

//ISBN 0 521 75033 4

int GrayToInt(int i)

{

  int power = 1;

  while (1)

  {

    const int j = i >> power;

    i ^= j;

    if (j == 0 || power == 16) return i;

    power <<= 1;

  }

}

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(C++) GrayToInt