lib/magento/Archive/Helper/File/Bz.php
protected function _read($length)
    {
        $data = bzread($this->_fileHandler, $length);

        if (false === $data) {
            throw new Mage_Exception('Failed to read data from ' . $this->_filePath);
        }

        return $data;
    }
protected function _read($length)
    {
        $data = bzread($this->_fileHandler, $length);

        if (false === $data) {
            throw new Mage_Exception('Failed to read data from ' . $this->_filePath);
        }

        return $data;
    }
protected function _read ( $ length ) { $ data = bzread ( $ this -> _fileHandler , $ length ) ; if ( false === $ data ) { throw new Mage_Exception ( 'Failed to read data from ' . $ this -> _filePath ) ; } return $ data ; }
Read data from bz archive

@throws Mage_Exception
@param int $length
@return string
Read data from bz archive