Function processDurationString

src/tscore/MatcherUtils.cc:326–408

char* processDurationString(char* str, int* seconds) Take a duration string which is composed of digits followed by a unit specifier w - week d - day h - hour m - min s - sec Trailing digits without a specifier are assumed to be seconds Returns nullptr on success and a static error string on failure

//    error string on failure
//
const char *
processDurationString(char *str, int *seconds)
{
  char *s       = str;
  char *current = str;
  char  unit;
  int   tmp;
  int   multiplier;
  int   result = 0;
  int   len;

  if (str == nullptr) {
    return "Missing time";
  }

  len = strlen(str);
  for (int i = 0; i < len; i++) {
    if (!ParseRules::is_digit(*current)) {
      // Make sure there is a time to process
      if (current == s) {
        return "Malformed time";
      }

      unit = *current;

      switch (unit) {
      case 'w':
        multiplier = 7 * 24 * 60 * 60;
        break;
      case 'd':
        multiplier = 24 * 60 * 60;
        break;
      case 'h':
        multiplier = 60 * 60;
        break;
      case 'm':
        multiplier = 60;
        break;
      case 's':
        multiplier = 1;
        break;
      case '-':
        return "Negative time not permitted";
      default:
        return "Invalid time unit specified";
      }

      *current = '\0';

      // coverity[secure_coding]
      if (sscanf(s, "%d", &tmp) != 1) {
        // Really should not happen since everything
        //   in the string is digit
        ink_assert(0);
        return "Malformed time";
      }

      result += (multiplier * tmp);