BKLMStatus.h

/**************************************************************************
 * basf2 (Belle II Analysis Software Framework)                           *
 * Author: The Belle II Collaboration                                     *
 *                                                                        *
 * See git log for contributors and copyright holders.                    *
 * This file is licensed under LGPL-3.0, see LICENSE.md.                  *
 **************************************************************************/
 
#pragma once
 
namespace Belle2 {
  class BKLMStatus {
 
  public:
 
    BKLMStatus()
    {
    }
 
    ~BKLMStatus()
    {
    }
 
    static int getMaximalStrip(int module)
    {
      return ((module & BKLM_MAXSTRIP_MASK) >> BKLM_MAXSTRIP_BIT) + 1;
    }
 
    static void setMaximalStrip(int& module, int strip)
    {
 
#ifdef __clang_analyzer__
      // unused junk assignment purely to calm the nerves of the clang analyzer
      // (references the two arguments to avoid nattering about unused variables)
      module = module + (strip - 1);
#else
      // the clang analyzer falsely thinks that this bitwise operation produces garbage
      module = (module & (~BKLM_MAXSTRIP_MASK)) | ((strip - 1) << BKLM_MAXSTRIP_BIT);
#endif
    }
 
  protected:
 
    static constexpr int BKLM_MAXSTRIP_BIT = 15;
 
    static constexpr int BKLM_MAXSTRIP_MASK = (63 << BKLM_MAXSTRIP_BIT);
 
  };
 
}