private function __readPropertySets()
{
$offset = 0;
while ($offset < strlen($this->entry)) {
$d = substr($this->entry, $offset, self::PROPERTY_STORAGE_BLOCK_SIZE);
$nameSize = ord($d[self::SIZE_OF_NAME_POS]) | ord($d[self::SIZE_OF_NAME_POS + 1]) << 8;
$type = ord($d[self::TYPE_POS]);
$startBlock = ExelReaderHelper::GetInt4d($d, self::START_BLOCK_POS);
$size = ExelReaderHelper::GetInt4d($d, self::SIZE_POS);
$name = '';
for ($i = 0; $i < $nameSize; $i++) {
$name .= $d[$i];
}
$name = str_replace("", "", $name);
$this->props[] = ['name' => $name, 'type' => $type, 'startBlock' => $startBlock, 'size' => $size];
if (strtolower($name) == "workbook" || strtolower($name) == "book") {
$this->wrkbook = count($this->props) - 1;
}
if ($name == "Root Entry") {
$this->rootentry = count($this->props) - 1;
}
$offset += self::PROPERTY_STORAGE_BLOCK_SIZE;
}
}
