SNDLHCEventHeader.cxx File Reference

#include "SNDLHCEventHeader.h"
#include "SNDLHCEventHeaderConst.h"
#include "FairRootManager.h"
#include <ctime>
#include <iostream>
#include <map>
#include <string>
#include <vector>

Include dependency graph for SNDLHCEventHeader.cxx:

Go to the source code of this file.

Functions
constexpr int	maskToShift (uint64_t mask)

Function Documentation

maskToShift()

constexpr int maskToShift ( uint64_t  mask )

constexpr

Definition at line 14 of file SNDLHCEventHeader.cxx.

                                         {
    int c = 64; // c will be the number of zero bits on the right
    mask &= -mask;
    if (mask) c--;
    if (mask & 0x00000000FFFFFFFF) c -= 32;
    if (mask & 0x0000FFFF0000FFFF) c -= 16;
    if (mask & 0x00FF00FF00FF00FF) c -= 8;
    if (mask & 0x0F0F0F0F0F0F0F0F) c -= 4;
    if (mask & 0x3333333333333333) c -= 2;
    if (mask & 0x5555555555555555) c -= 1;
 
    return c;
}