StreamerFileIO.cc

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#include "IOPool/Streamer/interface/StreamerFileIO.h"
#include <fstream>
#include <iostream>
#include "FWCore/Utilities/interface/Adler32Calculator.h"
#include "FWCore/Utilities/interface/Exception.h"
 
namespace edm::streamer {
  OutputFile::OutputFile(const std::string& name)
      : current_offset_(1),
        do_adler_(false),
        adlera_(1),
        adlerb_(0),
        ost_(new std::ofstream(name.c_str(), std::ios_base::binary | std::ios_base::out)),
        filename_(name) {
    if (!ost_->is_open()) {
      throw cms::Exception("OutputFile", "OutputFile") << "Error Opening Output File: " << name << "\n";
    }
    ost_->rdbuf()->pubsetbuf(nullptr, 0);
  }
 
  OutputFile::~OutputFile() { ost_->close(); }
 
  bool OutputFile::write(const char* ptr, size_t n) {
    ost_->write(ptr, n);
    if (!ost_->fail()) {
      current_offset_ += (uint64)(n);
      if (do_adler_)
        cms::Adler32(ptr, n, adlera_, adlerb_);
      return false;
    }
    return true;
  }
 
  void OutputFile::close() { ost_->close(); }
}  // namespace edm::streamer