CbmPsdAddress.h

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/* Copyright (C) 2019-2020 GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
   SPDX-License-Identifier: GPL-3.0-only
   Authors: Nikolay Karpushkin, David Emschermann [committer] */
 
#ifndef CBMPSDADDRESS_H
#define CBMPSDADDRESS_H 1
 
#include "CbmDefs.h"  // for ECbmModuleId::kPsd
 
#include <cassert>  // for assert
#include <cstdint>
 
class CbmPsdAddress {
public:
  static uint32_t GetAddress(int32_t moduleId, int32_t sectionId)
  {
    assert(!(moduleId < 0 || moduleId > fgkModuleIdLength || sectionId < 0 || sectionId > fgkSectionIdLength));
    return (ToIntegralType(ECbmModuleId::kPsd) << fgkSystemIdShift) | (moduleId << fgkModuleIdShift)
           | (sectionId << fgkSectionIdShift);
  }
 
  static uint32_t GetSystemId(uint32_t address)
  {
    return (address & (fgkSystemIdLength << fgkSystemIdShift)) >> fgkSystemIdShift;
  }
 
  static uint32_t GetModuleId(uint32_t address)
  {
    return (address & (fgkModuleIdLength << fgkModuleIdShift)) >> fgkModuleIdShift;
  }
 
  static uint32_t GetSectionId(uint32_t address)
  {
    return (address & (fgkSectionIdLength << fgkSectionIdShift)) >> fgkSectionIdShift;
  }
 
  static uint32_t SetModuleId(uint32_t address, int32_t newModuleId)
  {
    assert(!(newModuleId < 0 || newModuleId > fgkModuleIdLength));
    return GetAddress(newModuleId, GetSectionId(address));
  }
 
  static uint32_t SetSectionId(uint32_t address, int32_t newSectionId)
  {
    assert(!(newSectionId < 0 || newSectionId > fgkSectionIdLength));
    return GetAddress(GetModuleId(address), newSectionId);
  }
 
 
private:
  // Length of the index of the corresponding volume
  static const int32_t fgkSystemIdLength  = 15;  // 2^4 - 1
  static const int32_t fgkModuleIdLength  = 63;  // 2^6 - 1
  static const int32_t fgkSectionIdLength = 31;  // 2^5 - 1
 
  // Number of a start bit for each volume
  static const int32_t fgkSystemIdShift  = 0;
  static const int32_t fgkModuleIdShift  = 4;
  static const int32_t fgkSectionIdShift = 10;
};
 
#endif