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CalLogId.h

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#ifndef GlastEvent_LOGID_H
#define GlastEvent_LOGID_H 1


// Include files
#include <iostream>
using namespace std;

#include "GaudiKernel/Kernel.h"
#include "GaudiKernel/ContainedObject.h"


namespace idents {
class CalLogId : public ContainedObject {

private:

        // Packed word containing log ID = (tower*8 + layer)*16 + column
        int m_packedId;
        short m_tower, m_layer, m_column;

        inline void unpackId()
        {
                m_tower = getTower();
                m_layer = getLayer();
                m_column = getColumn();
        };
        inline void packId(short tower, short layer, short column) 
                {m_packedId = (((tower<<3) + layer)<<4) + column;};

public:

        CalLogId(int packedId=0) :
                m_packedId(packedId)
        {
                unpackId();
        };

        CalLogId(short tower, short layer, short column) 
        {
                packId(tower, layer, column);
                m_tower = tower;
                m_layer = layer;
                m_column = column;
        };
    
        ~CalLogId();

        void init();

        // get packed ID or unpacked tower, layer, and column
        inline int getPackedId() const {return m_packedId;};
        void getUnpackedId(short& tower, short& layer, short& column);

        // get tower, layer, and column numbers individually from packed ID
        inline short getTower() const {return (m_packedId >> 0x7) & 0xf;};
        inline short getLayer() const {return (m_packedId >> 0x4) & 0x7;};
        inline short getColumn() const {return m_packedId & 0xf;};

        friend ostream& operator<< (ostream &stream, CalLogId logId);
        friend istream& operator>> (istream &stream, CalLogId &logId);

        virtual StreamBuffer& serialize( StreamBuffer& s ) const;
        virtual StreamBuffer& serialize( StreamBuffer& s );

};


// overload the inserter to stream unpacked tower, layer and column
ostream& operator<<(ostream &stream, CalLogId logId)
{
        stream << logId.m_tower << " ";
        stream << logId.m_layer << " ";
        stream << logId.m_column << " ";
        return stream;
}


// extract unpacked ID, and stuff packed ID from unpacked info
istream& operator>> (istream &stream, CalLogId &logId)
{
        stream >> logId.m_tower >> logId.m_layer >> logId.m_column;
        logId.packId(logId.m_tower, logId.m_layer, logId.m_column);             // ensure m_packedId is synced
        return stream;
}


void CalLogId::getUnpackedId(short& tower, short& layer, short& column)
{
        tower  = m_tower;
        layer  = m_layer;
        column = m_column;
}


inline StreamBuffer& CalLogId::serialize( StreamBuffer& s ) const
{
        ContainedObject::serialize(s);  
        return s << m_packedId;
}


inline StreamBuffer& CalLogId::serialize( StreamBuffer& s )
{
        ContainedObject::serialize(s);
        s >> m_packedId;
        unpackId();             // ensure m_tower,m_layer,m_column are synced
        return s;
}

} // namespace idents
#endif    // GlastEvent_LOGID_H

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