Function csv_detect_header

libCacheSim/traceReader/generalReader/csv.c:124–160

* @brief detect whether the csv trace has header, * it uses a simple algorithm: compare the number of digits and letters in the * first line, if there are more digits than letters, then the first line is not * header, otherwise, the first line is header * * @param reader * @return true * @return false */

 * @return false
 */
static bool csv_detect_header(const reader_t *reader) {
  char first_line[1024] = {0};
  int buf_size = read_first_line(reader, first_line, 1024);
  assert(buf_size < 1024);

  bool has_header = true;

  int n_digit = 0, n_af = 0, n_letter = 0;
  for (int i = 0; i < buf_size; i++) {
    if (isdigit(first_line[i])) {
      n_digit += 1;
    } else if (isalpha(first_line[i])) {
      n_letter += 1;
      if ((first_line[i] <= 'f' && first_line[i] >= 'a') ||
          (first_line[i] <= 'F' && first_line[i] >= 'A')) {
        /* a-f can be hex number */
        n_af += 1;
      }
    } else {
      ;
    }
  }

  if (n_digit > n_letter) {
    has_header = false;
  } else if (n_digit < n_letter - n_af) {
    has_header = true;
  }

  static bool has_printed = false;
  if (!has_printed) {
    INFO("detect csv trace has header %d\n", has_header);
    has_printed = true;
  }

  return has_header;
}

/**
 * @brief check whether the trace uses the given delimiter by making sure