Method writeBasis

highs/lp_data/Highs.cpp:956–985

}

HighsStatus Highs::writeBasis(const std::string& filename) {
  HighsStatus return_status = HighsStatus::kOk;
  HighsStatus call_status;
  FILE* file;
  HighsFileType file_type;
  call_status = openWriteFile(filename, "writeBasis", file, file_type);
  return_status = interpretCallStatus(options_.log_options, call_status,
                                      return_status, "openWriteFile");
  if (return_status == HighsStatus::kError) return return_status;
  call_status = normaliseNames(this->options_.log_options, this->model_.lp_);
  return_status = interpretCallStatus(options_.log_options, call_status,
                                      return_status, "normaliseNames");
  assert(call_status != HighsStatus::kError);

  // Report to user that basis is being written
  if (filename != "") {
    if (!basis_.valid) {
      highsLogUser(options_.log_options, HighsLogType::kWarning,
                   "No basis to write: generated null basis file %s\n",
                   filename.c_str());
      return_status = HighsStatus::kWarning;
    } else {
      highsLogUser(options_.log_options, HighsLogType::kInfo,
                   "Writing the basis to %s\n", filename.c_str());
    }
  }
  writeBasisFile(file, options_, model_.lp_, basis_);
  if (file != stdout) fclose(file);
  return return_status;
}

HighsStatus Highs::presolve() {
  const HighsLogOptions& log_options = options_.log_options;