/**
* @return bool
* @throws \Exception
*/
protected function initFile()
{
if (parent::initFile()) {
return true;
}
$this->fp = @fopen($this->filename, 'rb');
if ($this->fp === FALSE) {
throw new \Exception("Invalid {$this->filename} file!");
}
$offset = unpack('Nlen', fread($this->fp, 4));
$this->offset = $offset['len'] - 1024;
if ($this->offset < 4) {
throw new \Exception("Invalid {$this->filename} file!");
}
$this->end = $this->offset - 4;
$this->index = fread($this->fp, $this->end);
$this->rewind();
return true;
}
/**
* @return bool
* @throws \Exception
*/
protected function initFile()
{
if (parent::initFile()) {
return true;
}
$this->fp = @fopen($this->filename, 'rb');
if ($this->fp === FALSE) {
throw new \Exception("Invalid {$this->filename} file!");
}
$offset = unpack('Vlen', fread($this->fp, 4));
$end = unpack('Vlen', fread($this->fp, 4));
$this->end = $end['len'] - $offset['len'] + 7;
if ($offset['len'] < 4) {
throw new \Exception("Invalid {$this->filename} file!");
}
if ($this->end < 7) {
throw new \Exception("Invalid {$this->filename} file!");
}
fseek($this->fp, $offset['len']);
$this->index = fread($this->fp, $this->end);
return true;
}