     const FormatOptsT format_opts,
     const std::vector<std::vector<char>>& data,
     const bool warmup,
-    const int count,
+    const size_t count,
     const bool csv_output,
     const bool use_tabs,
-    const int duplicates,
-    const int num_files)
+    const size_t duplicates,
+    const size_t num_files)
 {
   const std::string separator = use_tabs ? "\t" : ",";
 


std::vector<std::vector<char>>
multi_file(const std::vector<std::string>& filenames, const size_t chunk_size,
    const bool has_page_sizes, const int num_duplicates)
{
  std::vector<std::vector<char>> split_data;


  }

  const size_t num_chunks = split_data.size();
  for (size_t d = 0; d < num_duplicates; ++d) {
    split_data.insert(split_data.end(), split_data.begin(),
        split_data.begin()+num_chunks);
  }
