/**
* Read some data into the array.
*
* @param int $len How much to read
* @return string The data that has been read
* @throws TTransportException if cannot read any more data
*/
public function read($len)
{
if (strlen($this->rbuffer_) > 0) {
$ret = substr($this->rbuffer_, 0, $len);
$this->rbuffer_ = substr($this->rbuffer_, $len);
return $ret;
}
$data = $this->transport_->readAll(4);
$array = unpack('Nlength', $data);
$length = $array['length'];
$this->rbuffer_ = $this->transport_->readAll($length);
$ret = substr($this->rbuffer_, 0, $len);
$this->rbuffer_ = substr($this->rbuffer_, $len);
return $ret;
}
/**
* Reads a chunk of data into the internal read buffer.
*/
private function readFrame()
{
$buf = $this->transport_->readAll(4);
$val = unpack('N', $buf);
$sz = $val[1];
$this->rBuf_ = $this->transport_->readAll($sz);
}
/**
* Peek some bytes in the buffer without removing the bytes from it
*
* @param int $len length to peek
* @param int $start the start position of the returned string
*
* @return null on peek failure
*/
public function peek($len, $start = 0)
{
$bytes_needed = $len + $start;
// read until either timeout OR get enough bytes
if (strlen($this->rBuf_) == 0) {
$this->rBuf_ = $this->transport_->readAll($bytes_needed);
} else {
if ($bytes_needed > strlen($this->rBuf_)) {
$this->rBuf_ .= $this->transport_->readAll($bytes_needed - strlen($this->rBuf_));
}
}
$ret = substr($this->rBuf_, $start, $len);
return $ret;
}
/**
* The reason that we customize readAll here is that the majority of PHP
* streams are already internally buffered by PHP. The socket stream, for
* example, buffers internally and blocks if you call read with $len greater
* than the amount of data available, unlike recv() in C.
*
* Therefore, use the readAll method of the wrapped transport inside
* the buffered readAll.
*/
public function readAll($len)
{
$have = strlen($this->rBuf_);
if ($have == 0) {
$data = $this->transport_->readAll($len);
} else {
if ($have < $len) {
$data = $this->rBuf_;
$this->rBuf_ = '';
$data .= $this->transport_->readAll($len - $have);
} else {
if ($have == $len) {
$data = $this->rBuf_;
$this->rBuf_ = '';
} else {
if ($have > $len) {
$data = substr($this->rBuf_, 0, $len);
$this->rBuf_ = substr($this->rBuf_, $len);
}
}
}
}
return $data;
}
/**
* Utility for skipping binary data
*
* @param TTransport $itrans TTransport object
* @param int $type Field type
*/
public static function skipBinary($itrans, $type)
{
switch ($type) {
case TType::BOOL:
return $itrans->readAll(1);
case TType::BYTE:
return $itrans->readAll(1);
case TType::I16:
return $itrans->readAll(2);
case TType::I32:
return $itrans->readAll(4);
case TType::I64:
return $itrans->readAll(8);
case TType::DOUBLE:
return $itrans->readAll(8);
case TType::STRING:
$len = unpack('N', $itrans->readAll(4));
$len = $len[1];
if ($len > 0x7fffffff) {
$len = 0 - ($len - 1 ^ 0xffffffff);
}
return 4 + $itrans->readAll($len);
case TType::STRUCT:
$result = 0;
while (true) {
$ftype = 0;
$fid = 0;
$data = $itrans->readAll(1);
$arr = unpack('c', $data);
$ftype = $arr[1];
if ($ftype == TType::STOP) {
break;
}
// I16 field id
$result += $itrans->readAll(2);
$result += self::skipBinary($itrans, $ftype);
}
return $result;
case TType::MAP:
// Ktype
$data = $itrans->readAll(1);
$arr = unpack('c', $data);
$ktype = $arr[1];
// Vtype
$data = $itrans->readAll(1);
$arr = unpack('c', $data);
$vtype = $arr[1];
// Size
$data = $itrans->readAll(4);
$arr = unpack('N', $data);
$size = $arr[1];
if ($size > 0x7fffffff) {
$size = 0 - ($size - 1 ^ 0xffffffff);
}
$result = 6;
for ($i = 0; $i < $size; $i++) {
$result += self::skipBinary($itrans, $ktype);
$result += self::skipBinary($itrans, $vtype);
}
return $result;
case TType::SET:
case TType::LST:
// Vtype
$data = $itrans->readAll(1);
$arr = unpack('c', $data);
$vtype = $arr[1];
// Size
$data = $itrans->readAll(4);
$arr = unpack('N', $data);
$size = $arr[1];
if ($size > 0x7fffffff) {
$size = 0 - ($size - 1 ^ 0xffffffff);
}
$result = 5;
for ($i = 0; $i < $size; $i++) {
$result += self::skipBinary($itrans, $vtype);
}
return $result;
default:
throw new TProtocolException('Unknown field type: ' . $type, TProtocolException::INVALID_DATA);
}
}
