Function CountLines

catboost/private/libs/data_util/line_data_reader.cpp:18–27

    }

    int CountLines(const TString& poolFile) {
        CB_ENSURE(NFs::Exists(TString(poolFile)), "pool file '" << TString(poolFile) << "' is not found");
        TIFStream reader(poolFile.c_str());
        size_t count = 0;
        TString buffer;
        while (reader.ReadLine(buffer)) {
            ++count;
        }
        return count;
    }


    TBlocksSubsetLineDataReader::TBlocksSubsetLineDataReader(THolder<ILineDataReader>&& lineDataReader, TVector<TIndexRange<ui64>>&& subsetBlocks)