SimpleMsgBuf.cc

Go to the documentation of this file.

#include "EventFilter/Utilities/interface/SimpleMsgBuf.h"
#include <cstring>
#include <iostream>

using namespace evf;

SimpleMsgBuf::SimpleMsgBuf() :
    MsgBuf(), usedSize_(0) {
    setBufferPointers();
}

SimpleMsgBuf::SimpleMsgBuf(unsigned int size, unsigned int type) :
    MsgBuf(size, type), usedSize_(0) {
    setBufferPointers();
}

SimpleMsgBuf::~SimpleMsgBuf() {

}

//TODO ensure buffer is big enough for all these operations

void SimpleMsgBuf::setRLE(unsigned int run, unsigned int lumi, unsigned int evt) {
    // copy run number
    memcpy(pRun_, &run, sizeof(unsigned int));
    // copy lumi number
    memcpy(pLumi_, &lumi, sizeof(unsigned int));
    // copy event number
    memcpy(pEvt_, &evt, sizeof(unsigned int));
}

void SimpleMsgBuf::addFedSize(unsigned int fedSize) {
    memcpy(pVarSize_, &fedSize, sizeof(unsigned int));
    pVarSize_ += sizeof(unsigned int);
}

void SimpleMsgBuf::addFedData(const unsigned char* fedRawData,
        unsigned int segmentSize) {
    memcpy(pVarData_, fedRawData, segmentSize);
    pVarData_ += segmentSize;

    // increase used size by current fed data
    usedSize_ += segmentSize;

}

void SimpleMsgBuf::getRun(unsigned int& run) const {
    memcpy(&run, pRun_, sizeof(unsigned int));
}

void SimpleMsgBuf::getLumi(unsigned int& lumi) const {
    memcpy(&lumi, pLumi_, sizeof(unsigned int));
}

void SimpleMsgBuf::getEvt(unsigned int& evt) const {
    memcpy(&evt, pEvt_, sizeof(unsigned int));
}

char* SimpleMsgBuf::getFedSizeStart() {
    return pFedSizes_;
}

char* SimpleMsgBuf::getFedDataStart() {
    return pFedRawData_;
}

char* SimpleMsgBuf::getFedDataEnd() {
    return pVarData_;
}

void SimpleMsgBuf::setBufferPointers() {
    pRun_ = ptr_->mtext;
    pLumi_ = pRun_ + sizeof(unsigned int);
    pEvt_ = pLumi_ + sizeof(unsigned int);
    pFedSizes_ = pEvt_ + sizeof(unsigned int);
    pFedRawData_ = pFedSizes_ + N_FEDS * sizeof(unsigned int);

    // used size is size of header (run, lumi, evt, N_FEDS * sizeof(unsigned int))
    // increases as raw data is added
    usedSize_ = pFedRawData_ - pRun_;

    pVarSize_ = pFedSizes_;
    pVarData_ = pFedRawData_;
}