null $p_len:
bool
public function _jumpBlock($p_len = null) {
if (is_resource($this->_file)) {
if ($p_len === null) {
$p_len = 1;
}
if ($this->_compress_type == 'gz') {
@gzseek($this->_file, gztell($this->_file) + $p_len * 512);
}
else {
if ($this->_compress_type == 'bz2') {
// ----- Replace missing bztell() and bzseek()
for ($i = 0; $i < $p_len; $i++) {
$this
->_readBlock();
}
}
else {
if ($this->_compress_type == 'lzma2') {
// ----- Replace missing xztell() and xzseek()
for ($i = 0; $i < $p_len; $i++) {
$this
->_readBlock();
}
}
else {
if ($this->_compress_type == 'none') {
@fseek($this->_file, $p_len * 512, SEEK_CUR);
}
else {
$this
->_error('Unknown or missing compression type (' . $this->_compress_type . ')');
}
}
}
}
}
return true;
}