function phutil_utf8v()

in src/utils/utf8.php [396:449]

• 48 lines of code
• 16 McCabe index (conditional complexity)

function phutil_utf8v($string, $byte_limit = null) {
  $res = array();
  $len = strlen($string);

  $ii = 0;
  while ($ii < $len) {
    $byte = $string[$ii];
    if ($byte <= "\x7F") {
      $res[] = $byte;
      $ii += 1;

      if ($byte_limit && ($ii >= $byte_limit)) {
        break;
      }

      continue;
    } else if ($byte < "\xC0") {
      throw new Exception(
        pht('Invalid UTF-8 string passed to %s.', __FUNCTION__));
    } else if ($byte <= "\xDF") {
      $seq_len = 2;
    } else if ($byte <= "\xEF") {
      $seq_len = 3;
    } else if ($byte <= "\xF7") {
      $seq_len = 4;
    } else if ($byte <= "\xFB") {
      $seq_len = 5;
    } else if ($byte <= "\xFD") {
      $seq_len = 6;
    } else {
      throw new Exception(
        pht('Invalid UTF-8 string passed to %s.', __FUNCTION__));
    }

    if ($ii + $seq_len > $len) {
      throw new Exception(
        pht('Invalid UTF-8 string passed to %s.', __FUNCTION__));
    }
    for ($jj = 1; $jj < $seq_len; ++$jj) {
      if ($string[$ii + $jj] >= "\xC0") {
        throw new Exception(
          pht('Invalid UTF-8 string passed to %s.', __FUNCTION__));
      }
    }
    $res[] = substr($string, $ii, $seq_len);
    $ii += $seq_len;

    if ($byte_limit && ($ii >= $byte_limit)) {
      break;
    }
  }

  return $res;
}