public function Decoder::decode in Smart IP 7.2

Same name and namespace in other branches

1. 6.2 includes/vendor/maxmind-db/reader/src/MaxMind/Db/Reader/Decoder.php \MaxMind\Db\Reader\Decoder::decode()

2 calls to Decoder::decode()

Decoder::decodeArray in includes/vendor/maxmind-db/reader/src/MaxMind/Db/Reader/Decoder.php

Decoder::decodeMap in includes/vendor/maxmind-db/reader/src/MaxMind/Db/Reader/Decoder.php

File

includes/vendor/maxmind-db/reader/src/MaxMind/Db/Reader/Decoder.php, line 49

Class

Decoder

Namespace

MaxMind\Db\Reader

Code

public function decode($offset) {
  list(, $ctrlByte) = unpack('C', Util::read($this->fileStream, $offset, 1));
  $offset++;
  $type = $this->types[$ctrlByte >> 5];

  // Pointers are a special case, we don't read the next $size bytes, we
  // use the size to determine the length of the pointer and then follow
  // it.
  if ($type == 'pointer') {
    list($pointer, $offset) = $this
      ->decodePointer($ctrlByte, $offset);

    // for unit testing
    if ($this->pointerTestHack) {
      return array(
        $pointer,
      );
    }
    list($result) = $this
      ->decode($pointer);
    return array(
      $result,
      $offset,
    );
  }
  if ($type == 'extended') {
    list(, $nextByte) = unpack('C', Util::read($this->fileStream, $offset, 1));
    $typeNum = $nextByte + 7;
    if ($typeNum < 8) {
      throw new InvalidDatabaseException("Something went horribly wrong in the decoder. An extended type " . "resolved to a type number < 8 (" . $this->types[$typeNum] . ")");
    }
    $type = $this->types[$typeNum];
    $offset++;
  }
  list($size, $offset) = $this
    ->sizeFromCtrlByte($ctrlByte, $offset);
  return $this
    ->decodeByType($type, $offset, $size);
}