#include <RandomEngineStates.h>

Public Member Functions
void	getRandomEngineStates (std::vector< RandomEngineState > &states) const
bool	isProductEqual (RandomEngineStates const &randomEngineStates) const
	RandomEngineStates ()
void	setRandomEngineStates (std::vector< RandomEngineState > const &states)
	~RandomEngineStates ()
Private Attributes
std::vector< std::string >	moduleLabels_
std::vector< unsigned >	seedLengths_
std::vector< unsigned >	seedVectors_
std::vector< unsigned >	stateLengths_
std::vector< unsigned >	stateVectors_

Detailed Description

Description: Holds the states of multiple random number engines and associated seeds and module labels.

Usage: This should only be used by the Random Number Generator Service.

Author:: W. David Dagenhart, created December 3, 2010

Definition at line 23 of file RandomEngineStates.h.

Constructor & Destructor Documentation

edm::RandomEngineStates::RandomEngineStates ( )

Definition at line 10 of file RandomEngineStates.cc.

                                         {
  }

edm::RandomEngineStates::~RandomEngineStates ( )

Definition at line 13 of file RandomEngineStates.cc.

                                          {
  }

Member Function Documentation

void edm::RandomEngineStates::getRandomEngineStates ( std::vector< RandomEngineState > & states ) const

Definition at line 17 of file RandomEngineStates.cc.

References edm::errors::Configuration, edm::errors::EventCorruption, Exception, i, label, moduleLabels_, seedLengths_, seedVectors_, RandomEngineState::setLabel(), stateLengths_, and stateVectors_.

                                                                                       {

    // First check for data corruption so that the following code
    // does not encounter out of range errors.
    bool corrupt = false;

    if (moduleLabels_.size() != seedLengths_.size()) corrupt = true;
    if (moduleLabels_.size() != stateLengths_.size()) corrupt = true;

    unsigned int sum = 0U;
    for (std::vector<unsigned>::const_iterator i = seedLengths_.begin(),
                                            iEnd = seedLengths_.end();
         i != iEnd; ++i) {
      sum += *i;
    }
    if (sum != seedVectors_.size()) corrupt = true;

    sum = 0U;
    for (std::vector<unsigned>::const_iterator i = stateLengths_.begin(),
                                            iEnd = stateLengths_.end();
         i != iEnd; ++i) {
      sum += *i;
    }
    if (sum != stateVectors_.size()) corrupt = true;

    if (corrupt) {
      throw edm::Exception(errors::EventCorruption)
        << "RandomEngineStates data is corrupted.\n";
    }

    // Done with error checks.  Now do the work.

    std::vector<unsigned>::const_iterator seedLength = seedLengths_.begin();
    std::vector<unsigned>::const_iterator seedBegin = seedVectors_.begin();
    std::vector<unsigned>::const_iterator seedEnd = seedVectors_.begin();

    std::vector<unsigned>::const_iterator stateLength = stateLengths_.begin();
    std::vector<unsigned>::const_iterator stateBegin = stateVectors_.begin();
    std::vector<unsigned>::const_iterator stateEnd = stateVectors_.begin();

    for (std::vector<std::string>::const_iterator label = moduleLabels_.begin(),
                                               labelEnd = moduleLabels_.end();
         label != labelEnd;
         ++label, ++seedLength, ++stateLength) {

      seedBegin = seedEnd;
      seedEnd += *seedLength;

      stateBegin = stateEnd;
      stateEnd += *stateLength;

      RandomEngineState randomEngineState;
      randomEngineState.setLabel(*label);
      std::vector<RandomEngineState>::iterator state = 
        std::lower_bound(states.begin(), states.end(), randomEngineState);

      if (state != states.end() && *label == state->getLabel()) {
        if (*seedLength != state->getSeed().size() ||
            *stateLength != state->getState().size()) {
          throw edm::Exception(edm::errors::Configuration)
            << "When attempting to replay processing with the RandomNumberGeneratorService,\n"
            << "the engine type for each module must be the same in the replay configuration\n"
            << "and the original configuration.  If this is not the problem, then the data\n"
            << "is somehow corrupted or there is a bug because the vector in the data containing\n"
            << "the seeds or engine state is the incorrect size for the type of random engine.\n";
        }

        state->clearSeedVector();
        state->reserveSeedVector(*seedLength);
        for (std::vector<unsigned int>::const_iterator i = seedBegin;
             i != seedEnd; ++i) {
          state->push_back_seedVector(*i);
        }

        state->clearStateVector();
        state->reserveStateVector(*stateLength);
        for (std::vector<unsigned int>::const_iterator i = stateBegin;
             i != stateEnd; ++i) {
          state->push_back_stateVector(*i);
        }
      }
    }
  }

bool edm::RandomEngineStates::isProductEqual ( RandomEngineStates const & randomEngineStates ) const

Definition at line 143 of file RandomEngineStates.cc.

References moduleLabels_, seedLengths_, seedVectors_, stateLengths_, and stateVectors_.

                                                                                       {
    if (moduleLabels_ == randomEngineStates.moduleLabels_ &&
        seedLengths_ == randomEngineStates.seedLengths_ &&
        seedVectors_ == randomEngineStates.seedVectors_ &&
        stateLengths_ == randomEngineStates.stateLengths_ &&
        stateVectors_ == randomEngineStates.stateVectors_) {
      return true;
    }
    return false;
  }

void edm::RandomEngineStates::setRandomEngineStates ( std::vector< RandomEngineState > const & states )

Definition at line 103 of file RandomEngineStates.cc.

References j, label, moduleLabels_, seedLengths_, seedVectors_, evf::utils::state, stateLengths_, and stateVectors_.

                                                                                      {

    moduleLabels_.resize(states.size());
    seedLengths_.resize(states.size());
    seedVectors_.clear();
    stateLengths_.resize(states.size());
    stateVectors_.clear();

    std::vector<std::string>::iterator label = moduleLabels_.begin();
    std::vector<unsigned>::iterator seedLength = seedLengths_.begin();
    std::vector<unsigned>::iterator stateLength = stateLengths_.begin();


    for (std::vector<RandomEngineState>::const_iterator state = states.begin(),
                                                         iEnd = states.end();
         state != iEnd; ++state, ++label, ++seedLength, ++stateLength) {

      *label = state->getLabel();

      std::vector<uint32_t> const& seedVector = state->getSeed();
      *seedLength = seedVector.size();

      for (std::vector<uint32_t>::const_iterator j = seedVector.begin(),
                                              jEnd = seedVector.end();
           j != jEnd; ++j) {
        seedVectors_.push_back(*j);
      }

      std::vector<uint32_t> const& stateVector = state->getState();
      *stateLength = stateVector.size();

      for (std::vector<uint32_t>::const_iterator j = stateVector.begin(),
                                              jEnd = stateVector.end();
           j != jEnd; ++j) {
        stateVectors_.push_back(*j);
      }
    }
  }