BitOp.h

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// Dear emacs, this is -*- c++ -*-
/*
  Copyright (C) 2002-2018 CERN for the benefit of the ATLAS collaboration
*/
#ifndef TRIGT1INTERFACES_BITOP_H
#define TRIGT1INTERFACES_BITOP_H
 
// STL includes:
#include <string>

class BitOp {
 
public:
   static void printBin( unsigned int uintValue ) { printBinN( uintValue, 31 ); }
   static void printBin( int intValue ) { printBinN( intValue, 31 ); }
   static void printBinN( unsigned int uintValue, int nbits );
   static void printBinN( int intValue, int nbits );

   static const std::string printBits( const int value, const int startbit,
                                       const int endbit );

   inline static bool isSet( const unsigned int *uintValue, int bit ) {
      return ( *uintValue == ( *uintValue | ( 1 << bit ) ) );
   }
 
   inline static bool isSet( const int *intValue, int bit ) {
      return ( *intValue == ( *intValue | ( 1 << bit ) ) );
   }

   inline static void setBit( unsigned int *uintValue, int bit ) {
      *uintValue |= ( 1 << bit );
   }
   inline static void setBit( int *intValue, int bit ) {
      *intValue |= ( 1 << bit );
   }

   inline static void clearBit( unsigned int *uintValue, int bit ) {
      *uintValue |= ( 1 << bit ); *uintValue ^= ( 1 << bit );
   }
   inline static void clearBit( int *intValue, int bit ) {
      *intValue |= ( 1 << bit ); *intValue ^= ( 1 << bit );
   }

   inline static void sImposeNBits( unsigned int *uintValue, int stbit, int wrd ) {
      *uintValue |= ( wrd << stbit );
   }
   inline static void sImposeNBits( int *intValue, int stbit, int wrd ) {
      *intValue |= ( wrd << stbit );
   }
   inline static void sImposeNBits( unsigned int *uintValue, int stbit,
                                    unsigned int wrd ) {
      *uintValue |= ( wrd << stbit );
   }
   inline static void sImposeNBits( int *intValue, int stbit, unsigned int wrd ) {
      *intValue |= ( wrd << stbit );
   }

   static unsigned int alignBits( int value, int startbit, int endbit );
   static unsigned int createMask( int startbit, int endbit );

   static unsigned int getValue( const unsigned int * uintValue,
                                 const unsigned int mask );
 
}; // class BitOp
 
#endif // TRIGT1INTERFACES_BITOP_H