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<?php |
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/* |
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* This file is part of the rybakit/msgpack.php package. |
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* |
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* (c) Eugene Leonovich <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace MessagePack; |
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use MessagePack\Exception\InsufficientDataException; |
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use MessagePack\Exception\IntegerOverflowException; |
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use MessagePack\Exception\UnpackingFailedException; |
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use MessagePack\TypeTransformer\Unpackable; |
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class BufferUnpacker |
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{ |
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private $buffer; |
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private $offset = 0; |
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private $isBigIntAsStr; |
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private $isBigIntAsGmp; |
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/** |
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* @var Unpackable[]|null |
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*/ |
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private $transformers; |
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/** |
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* @param string $buffer |
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* @param UnpackOptions|int|null $options |
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* |
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* @throws \MessagePack\Exception\InvalidOptionException |
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*/ |
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public function __construct(string $buffer = '', $options = null) |
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{ |
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if (null === $options) { |
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$options = UnpackOptions::fromDefaults(); |
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} elseif (!$options instanceof PackOptions) { |
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$options = UnpackOptions::fromBitmask($options); |
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} |
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$this->isBigIntAsStr = $options->isBigIntAsStrMode(); |
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$this->isBigIntAsGmp = $options->isBigIntAsGmpMode(); |
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$this->buffer = $buffer; |
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} |
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public function registerTransformer(Unpackable $transformer) : self |
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{ |
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$this->transformers[$transformer->getType()] = $transformer; |
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return $this; |
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} |
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public function append(string $data) : self |
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{ |
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$this->buffer .= $data; |
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return $this; |
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} |
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public function reset(string $buffer = '') : self |
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{ |
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$this->buffer = $buffer; |
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$this->offset = 0; |
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return $this; |
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} |
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View Code Duplication |
public function seek(int $offset) : self |
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{ |
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if ($offset < 0) { |
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$offset += \strlen($this->buffer); |
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} |
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if (!isset($this->buffer[$offset])) { |
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throw new \OutOfBoundsException("Unable to seek to position $offset."); |
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} |
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$this->offset = $offset; |
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return $this; |
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} |
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View Code Duplication |
public function skip(int $offset) : self |
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{ |
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$offset += $this->offset; |
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if (!isset($this->buffer[$offset])) { |
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throw new \OutOfBoundsException("Unable to seek to position $offset."); |
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} |
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$this->offset = $offset; |
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return $this; |
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} |
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public function __clone() |
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{ |
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$this->buffer = ''; |
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$this->offset = 0; |
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} |
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public function tryUnpack() : array |
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{ |
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$data = []; |
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$offset = $this->offset; |
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try { |
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do { |
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$data[] = $this->unpack(); |
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$offset = $this->offset; |
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} while (isset($this->buffer[$this->offset])); |
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} catch (InsufficientDataException $e) { |
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$this->offset = $offset; |
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} |
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if ($this->offset) { |
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$this->buffer = isset($this->buffer[$this->offset]) ? \substr($this->buffer, $this->offset) : ''; |
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$this->offset = 0; |
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} |
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return $data; |
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} |
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public function unpack() |
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{ |
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if (!isset($this->buffer[$this->offset])) { |
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throw InsufficientDataException::unexpectedLength($this->buffer, $this->offset, 1); |
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} |
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$c = \ord($this->buffer[$this->offset]); |
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++$this->offset; |
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// fixint |
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if ($c <= 0x7f) { |
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return $c; |
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} |
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// fixstr |
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View Code Duplication |
if ($c >= 0xa0 && $c <= 0xbf) { |
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return ($c & 0x1f) ? $this->unpackStrData($c & 0x1f) : ''; |
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} |
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// fixarray |
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if ($c >= 0x90 && $c <= 0x9f) { |
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return ($c & 0xf) ? $this->unpackArrayData($c & 0xf) : []; |
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} |
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// fixmap |
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if ($c >= 0x80 && $c <= 0x8f) { |
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return ($c & 0xf) ? $this->unpackMapData($c & 0xf) : []; |
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} |
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// negfixint |
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if ($c >= 0xe0) { |
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return $c - 0x100; |
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} |
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switch ($c) { |
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case 0xc0: return null; |
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case 0xc2: return false; |
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case 0xc3: return true; |
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// bin |
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case 0xc4: return $this->unpackStrData($this->unpackUint8()); |
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case 0xc5: return $this->unpackStrData($this->unpackUint16()); |
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case 0xc6: return $this->unpackStrData($this->unpackUint32()); |
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// float |
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case 0xca: return $this->unpackFloat32(); |
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case 0xcb: return $this->unpackFloat64(); |
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// uint |
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case 0xcc: return $this->unpackUint8(); |
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case 0xcd: return $this->unpackUint16(); |
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case 0xce: return $this->unpackUint32(); |
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case 0xcf: return $this->unpackUint64(); |
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// int |
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case 0xd0: return $this->unpackInt8(); |
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case 0xd1: return $this->unpackInt16(); |
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case 0xd2: return $this->unpackInt32(); |
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case 0xd3: return $this->unpackInt64(); |
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// str |
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case 0xd9: return $this->unpackStrData($this->unpackUint8()); |
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case 0xda: return $this->unpackStrData($this->unpackUint16()); |
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case 0xdb: return $this->unpackStrData($this->unpackUint32()); |
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// array |
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case 0xdc: return $this->unpackArrayData($this->unpackUint16()); |
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case 0xdd: return $this->unpackArrayData($this->unpackUint32()); |
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// map |
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case 0xde: return $this->unpackMapData($this->unpackUint16()); |
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case 0xdf: return $this->unpackMapData($this->unpackUint32()); |
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// ext |
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case 0xd4: return $this->unpackExtData(1); |
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case 0xd5: return $this->unpackExtData(2); |
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case 0xd6: return $this->unpackExtData(4); |
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case 0xd7: return $this->unpackExtData(8); |
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case 0xd8: return $this->unpackExtData(16); |
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case 0xc7: return $this->unpackExtData($this->unpackUint8()); |
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case 0xc8: return $this->unpackExtData($this->unpackUint16()); |
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case 0xc9: return $this->unpackExtData($this->unpackUint32()); |
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} |
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throw UnpackingFailedException::unknownCode($c); |
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} |
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public function unpackNil() |
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{ |
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if (!isset($this->buffer[$this->offset])) { |
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throw InsufficientDataException::unexpectedLength($this->buffer, $this->offset, 1); |
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} |
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if ("\xc0" === $this->buffer[$this->offset]) { |
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++$this->offset; |
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return null; |
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} |
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throw UnpackingFailedException::unexpectedCode(\ord($this->buffer[$this->offset++]), 'nil'); |
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} |
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public function unpackBool() |
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{ |
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if (!isset($this->buffer[$this->offset])) { |
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throw InsufficientDataException::unexpectedLength($this->buffer, $this->offset, 1); |
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} |
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$c = \ord($this->buffer[$this->offset]); |
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++$this->offset; |
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if (0xc2 === $c) { |
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return false; |
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} |
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if (0xc3 === $c) { |
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return true; |
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} |
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throw UnpackingFailedException::unexpectedCode($c, 'bool'); |
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} |
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public function unpackInt() |
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{ |
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if (!isset($this->buffer[$this->offset])) { |
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throw InsufficientDataException::unexpectedLength($this->buffer, $this->offset, 1); |
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} |
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$c = \ord($this->buffer[$this->offset]); |
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++$this->offset; |
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// fixint |
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if ($c <= 0x7f) { |
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return $c; |
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} |
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// negfixint |
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if ($c >= 0xe0) { |
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return $c - 0x100; |
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} |
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switch ($c) { |
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// uint |
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case 0xcc: return $this->unpackUint8(); |
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case 0xcd: return $this->unpackUint16(); |
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case 0xce: return $this->unpackUint32(); |
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case 0xcf: return $this->unpackUint64(); |
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// int |
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case 0xd0: return $this->unpackInt8(); |
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case 0xd1: return $this->unpackInt16(); |
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case 0xd2: return $this->unpackInt32(); |
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case 0xd3: return $this->unpackInt64(); |
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} |
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throw UnpackingFailedException::unexpectedCode($c, 'int'); |
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} |
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public function unpackFloat() |
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{ |
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if (!isset($this->buffer[$this->offset])) { |
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throw InsufficientDataException::unexpectedLength($this->buffer, $this->offset, 1); |
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} |
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$c = \ord($this->buffer[$this->offset]); |
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++$this->offset; |
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if (0xcb === $c) { |
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return $this->unpackFloat64(); |
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} |
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if (0xca === $c) { |
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return $this->unpackFloat32(); |
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} |
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throw UnpackingFailedException::unexpectedCode($c, 'float'); |
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} |
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public function unpackStr() |
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{ |
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if (!isset($this->buffer[$this->offset])) { |
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throw InsufficientDataException::unexpectedLength($this->buffer, $this->offset, 1); |
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} |
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$c = \ord($this->buffer[$this->offset]); |
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++$this->offset; |
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13 |
View Code Duplication |
if ($c >= 0xa0 && $c <= 0xbf) { |
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return ($c & 0x1f) ? $this->unpackStrData($c & 0x1f) : ''; |
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} |
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8 |
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if (0xd9 === $c) { |
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4 |
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return $this->unpackStrData($this->unpackUint8()); |
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} |
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4 |
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if (0xda === $c) { |
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2 |
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return $this->unpackStrData($this->unpackUint16()); |
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} |
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2 |
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if (0xdb === $c) { |
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return $this->unpackStrData($this->unpackUint32()); |
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} |
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throw UnpackingFailedException::unexpectedCode($c, 'str'); |
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} |
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7 |
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public function unpackBin() |
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{ |
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7 |
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if (!isset($this->buffer[$this->offset])) { |
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1 |
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throw InsufficientDataException::unexpectedLength($this->buffer, $this->offset, 1); |
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} |
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6 |
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$c = \ord($this->buffer[$this->offset]); |
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6 |
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++$this->offset; |
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6 |
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if (0xc4 === $c) { |
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3 |
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return $this->unpackStrData($this->unpackUint8()); |
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} |
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3 |
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if (0xc5 === $c) { |
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1 |
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return $this->unpackStrData($this->unpackUint16()); |
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} |
340
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2 |
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if (0xc6 === $c) { |
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1 |
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return $this->unpackStrData($this->unpackUint32()); |
342
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} |
343
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|
344
|
1 |
|
throw UnpackingFailedException::unexpectedCode($c, 'bin'); |
345
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} |
346
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|
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347
|
9 |
|
public function unpackArray() |
348
|
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{ |
349
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9 |
|
$size = $this->unpackArrayHeader(); |
350
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|
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351
|
7 |
|
$array = []; |
352
|
7 |
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while ($size--) { |
353
|
6 |
|
$array[] = $this->unpack(); |
354
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} |
355
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356
|
7 |
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return $array; |
357
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} |
358
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359
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9 |
View Code Duplication |
public function unpackArrayHeader() |
|
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|
360
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|
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{ |
361
|
9 |
|
if (!isset($this->buffer[$this->offset])) { |
362
|
1 |
|
throw InsufficientDataException::unexpectedLength($this->buffer, $this->offset, 1); |
363
|
|
|
} |
364
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|
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|
365
|
8 |
|
$c = \ord($this->buffer[$this->offset]); |
366
|
8 |
|
++$this->offset; |
367
|
|
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|
368
|
8 |
|
if ($c >= 0x90 && $c <= 0x9f) { |
369
|
4 |
|
return $c & 0xf; |
370
|
|
|
} |
371
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4 |
|
if (0xdc === $c) { |
372
|
2 |
|
return $this->unpackUint16(); |
373
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} |
374
|
2 |
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if (0xdd === $c) { |
375
|
1 |
|
return $this->unpackUint32(); |
376
|
|
|
} |
377
|
|
|
|
378
|
1 |
|
throw UnpackingFailedException::unexpectedCode($c, 'array header'); |
379
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|
} |
380
|
|
|
|
381
|
13 |
|
public function unpackMap() |
382
|
|
|
{ |
383
|
13 |
|
$size = $this->unpackMapHeader(); |
384
|
|
|
|
385
|
11 |
|
$map = []; |
386
|
11 |
|
while ($size--) { |
387
|
10 |
|
$map[$this->unpack()] = $this->unpack(); |
388
|
|
|
} |
389
|
|
|
|
390
|
11 |
|
return $map; |
391
|
|
|
} |
392
|
|
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|
393
|
13 |
View Code Duplication |
public function unpackMapHeader() |
|
|
|
|
394
|
|
|
{ |
395
|
13 |
|
if (!isset($this->buffer[$this->offset])) { |
396
|
1 |
|
throw InsufficientDataException::unexpectedLength($this->buffer, $this->offset, 1); |
397
|
|
|
} |
398
|
|
|
|
399
|
12 |
|
$c = \ord($this->buffer[$this->offset]); |
400
|
12 |
|
++$this->offset; |
401
|
|
|
|
402
|
12 |
|
if ($c >= 0x80 && $c <= 0x8f) { |
403
|
8 |
|
return $c & 0xf; |
404
|
|
|
} |
405
|
4 |
|
if (0xde === $c) { |
406
|
2 |
|
return $this->unpackUint16(); |
407
|
|
|
} |
408
|
2 |
|
if (0xdf === $c) { |
409
|
1 |
|
return $this->unpackUint32(); |
410
|
|
|
} |
411
|
|
|
|
412
|
1 |
|
throw UnpackingFailedException::unexpectedCode($c, 'map header'); |
413
|
|
|
} |
414
|
|
|
|
415
|
10 |
|
public function unpackExt() |
416
|
|
|
{ |
417
|
10 |
|
if (!isset($this->buffer[$this->offset])) { |
418
|
1 |
|
throw InsufficientDataException::unexpectedLength($this->buffer, $this->offset, 1); |
419
|
|
|
} |
420
|
|
|
|
421
|
9 |
|
$c = \ord($this->buffer[$this->offset]); |
422
|
9 |
|
++$this->offset; |
423
|
|
|
|
424
|
9 |
|
switch ($c) { |
425
|
9 |
|
case 0xd4: return $this->unpackExtData(1); |
|
|
|
|
426
|
8 |
|
case 0xd5: return $this->unpackExtData(2); |
|
|
|
|
427
|
7 |
|
case 0xd6: return $this->unpackExtData(4); |
|
|
|
|
428
|
6 |
|
case 0xd7: return $this->unpackExtData(8); |
|
|
|
|
429
|
5 |
|
case 0xd8: return $this->unpackExtData(16); |
|
|
|
|
430
|
4 |
|
case 0xc7: return $this->unpackExtData($this->unpackUint8()); |
|
|
|
|
431
|
3 |
|
case 0xc8: return $this->unpackExtData($this->unpackUint16()); |
|
|
|
|
432
|
2 |
|
case 0xc9: return $this->unpackExtData($this->unpackUint32()); |
|
|
|
|
433
|
|
|
} |
434
|
|
|
|
435
|
1 |
|
throw UnpackingFailedException::unexpectedCode($c, 'ext header'); |
436
|
|
|
} |
437
|
|
|
|
438
|
34 |
|
private function unpackUint8() |
439
|
|
|
{ |
440
|
34 |
|
if (!isset($this->buffer[$this->offset])) { |
441
|
2 |
|
throw InsufficientDataException::unexpectedLength($this->buffer, $this->offset, 1); |
442
|
|
|
} |
443
|
|
|
|
444
|
32 |
|
return \ord($this->buffer[$this->offset++]); |
445
|
|
|
} |
446
|
|
|
|
447
|
28 |
|
private function unpackUint16() |
448
|
|
|
{ |
449
|
28 |
|
if (!isset($this->buffer[$this->offset + 1])) { |
450
|
2 |
|
throw InsufficientDataException::unexpectedLength($this->buffer, $this->offset, 2); |
451
|
|
|
} |
452
|
|
|
|
453
|
26 |
|
$hi = \ord($this->buffer[$this->offset]); |
454
|
26 |
|
$lo = \ord($this->buffer[++$this->offset]); |
455
|
26 |
|
++$this->offset; |
456
|
|
|
|
457
|
26 |
|
return $hi << 8 | $lo; |
458
|
|
|
} |
459
|
|
|
|
460
|
20 |
|
private function unpackUint32() |
461
|
|
|
{ |
462
|
20 |
|
if (!isset($this->buffer[$this->offset + 3])) { |
463
|
2 |
|
throw InsufficientDataException::unexpectedLength($this->buffer, $this->offset, 4); |
464
|
|
|
} |
465
|
|
|
|
466
|
18 |
|
$num = \unpack('N', $this->buffer, $this->offset)[1]; |
467
|
18 |
|
$this->offset += 4; |
468
|
|
|
|
469
|
18 |
|
return $num; |
470
|
|
|
} |
471
|
|
|
|
472
|
16 |
View Code Duplication |
private function unpackUint64() |
|
|
|
|
473
|
|
|
{ |
474
|
16 |
|
if (!isset($this->buffer[$this->offset + 7])) { |
475
|
1 |
|
throw InsufficientDataException::unexpectedLength($this->buffer, $this->offset, 8); |
476
|
|
|
} |
477
|
|
|
|
478
|
15 |
|
$num = \unpack('J', $this->buffer, $this->offset)[1]; |
479
|
15 |
|
$this->offset += 8; |
480
|
|
|
|
481
|
15 |
|
return $num < 0 ? $this->handleIntOverflow($num) : $num; |
482
|
|
|
} |
483
|
|
|
|
484
|
9 |
|
private function unpackInt8() |
485
|
|
|
{ |
486
|
9 |
|
if (!isset($this->buffer[$this->offset])) { |
487
|
1 |
|
throw InsufficientDataException::unexpectedLength($this->buffer, $this->offset, 1); |
488
|
|
|
} |
489
|
|
|
|
490
|
8 |
|
$num = \ord($this->buffer[$this->offset]); |
491
|
8 |
|
++$this->offset; |
492
|
|
|
|
493
|
8 |
|
return $num > 0x7f ? $num - 0x100 : $num; |
494
|
|
|
} |
495
|
|
|
|
496
|
9 |
|
private function unpackInt16() |
497
|
|
|
{ |
498
|
9 |
|
if (!isset($this->buffer[$this->offset + 1])) { |
499
|
1 |
|
throw InsufficientDataException::unexpectedLength($this->buffer, $this->offset, 2); |
500
|
|
|
} |
501
|
|
|
|
502
|
8 |
|
$hi = \ord($this->buffer[$this->offset]); |
503
|
8 |
|
$lo = \ord($this->buffer[++$this->offset]); |
504
|
8 |
|
++$this->offset; |
505
|
|
|
|
506
|
8 |
|
return $hi > 0x7f ? $hi << 8 | $lo - 0x10000 : $hi << 8 | $lo; |
507
|
|
|
} |
508
|
|
|
|
509
|
9 |
View Code Duplication |
private function unpackInt32() |
|
|
|
|
510
|
|
|
{ |
511
|
9 |
|
if (!isset($this->buffer[$this->offset + 3])) { |
512
|
1 |
|
throw InsufficientDataException::unexpectedLength($this->buffer, $this->offset, 4); |
513
|
|
|
} |
514
|
|
|
|
515
|
8 |
|
$num = \unpack('N', $this->buffer, $this->offset)[1]; |
516
|
8 |
|
$this->offset += 4; |
517
|
|
|
|
518
|
8 |
|
return $num > 0x7fffffff ? $num - 0x100000000 : $num; |
519
|
|
|
} |
520
|
|
|
|
521
|
15 |
|
private function unpackInt64() |
522
|
|
|
{ |
523
|
15 |
|
if (!isset($this->buffer[$this->offset + 7])) { |
524
|
1 |
|
throw InsufficientDataException::unexpectedLength($this->buffer, $this->offset, 8); |
525
|
|
|
} |
526
|
|
|
|
527
|
14 |
|
$num = \unpack('J', $this->buffer, $this->offset)[1]; |
528
|
14 |
|
$this->offset += 8; |
529
|
|
|
|
530
|
14 |
|
return $num; |
531
|
|
|
} |
532
|
|
|
|
533
|
5 |
|
private function unpackFloat32() |
534
|
|
|
{ |
535
|
5 |
|
if (!isset($this->buffer[$this->offset + 3])) { |
536
|
1 |
|
throw InsufficientDataException::unexpectedLength($this->buffer, $this->offset, 4); |
537
|
|
|
} |
538
|
|
|
|
539
|
4 |
|
$num = \unpack('G', $this->buffer, $this->offset)[1]; |
540
|
4 |
|
$this->offset += 4; |
541
|
|
|
|
542
|
4 |
|
return $num; |
543
|
|
|
} |
544
|
|
|
|
545
|
7 |
|
private function unpackFloat64() |
546
|
|
|
{ |
547
|
7 |
|
if (!isset($this->buffer[$this->offset + 7])) { |
548
|
1 |
|
throw InsufficientDataException::unexpectedLength($this->buffer, $this->offset, 8); |
549
|
|
|
} |
550
|
|
|
|
551
|
6 |
|
$num = \unpack('E', $this->buffer, $this->offset)[1]; |
552
|
6 |
|
$this->offset += 8; |
553
|
|
|
|
554
|
6 |
|
return $num; |
555
|
|
|
} |
556
|
|
|
|
557
|
47 |
|
private function unpackStrData($length) |
558
|
|
|
{ |
559
|
47 |
|
if (!isset($this->buffer[$this->offset + $length - 1])) { |
560
|
1 |
|
throw InsufficientDataException::unexpectedLength($this->buffer, $this->offset, $length); |
561
|
|
|
} |
562
|
|
|
|
563
|
47 |
|
$str = \substr($this->buffer, $this->offset, $length); |
564
|
47 |
|
$this->offset += $length; |
565
|
|
|
|
566
|
47 |
|
return $str; |
567
|
|
|
} |
568
|
|
|
|
569
|
11 |
|
private function unpackArrayData($size) |
570
|
|
|
{ |
571
|
11 |
|
$array = []; |
572
|
11 |
|
while ($size--) { |
573
|
11 |
|
$array[] = $this->unpack(); |
574
|
|
|
} |
575
|
|
|
|
576
|
11 |
|
return $array; |
577
|
|
|
} |
578
|
|
|
|
579
|
15 |
|
private function unpackMapData($size) |
580
|
|
|
{ |
581
|
15 |
|
$map = []; |
582
|
15 |
|
while ($size--) { |
583
|
15 |
|
$map[$this->unpack()] = $this->unpack(); |
584
|
|
|
} |
585
|
|
|
|
586
|
15 |
|
return $map; |
587
|
|
|
} |
588
|
|
|
|
589
|
24 |
|
private function unpackExtData($length) |
590
|
|
|
{ |
591
|
24 |
|
if (!isset($this->buffer[$this->offset + $length - 1])) { |
592
|
5 |
|
throw InsufficientDataException::unexpectedLength($this->buffer, $this->offset, $length); |
593
|
|
|
} |
594
|
|
|
|
595
|
|
|
// int8 |
596
|
19 |
|
$type = \ord($this->buffer[$this->offset]); |
597
|
19 |
|
++$this->offset; |
598
|
|
|
|
599
|
19 |
|
if ($type > 0x7f) { |
600
|
|
|
$type -= 0x100; |
601
|
|
|
} |
602
|
|
|
|
603
|
19 |
|
if (isset($this->transformers[$type])) { |
604
|
1 |
|
return $this->transformers[$type]->unpack($this, $length); |
605
|
|
|
} |
606
|
|
|
|
607
|
18 |
|
$data = \substr($this->buffer, $this->offset, $length); |
608
|
18 |
|
$this->offset += $length; |
609
|
|
|
|
610
|
18 |
|
return new Ext($type, $data); |
611
|
|
|
} |
612
|
|
|
|
613
|
5 |
|
private function handleIntOverflow($value) |
614
|
|
|
{ |
615
|
5 |
|
if ($this->isBigIntAsStr) { |
616
|
3 |
|
return \sprintf('%u', $value); |
617
|
|
|
} |
618
|
2 |
|
if ($this->isBigIntAsGmp) { |
619
|
1 |
|
return \gmp_init(\sprintf('%u', $value)); |
620
|
|
|
} |
621
|
|
|
|
622
|
1 |
|
throw new IntegerOverflowException($value); |
623
|
|
|
} |
624
|
|
|
} |
625
|
|
|
|
If a method or function can return multiple different values and unless you are sure that you only can receive a single value in this context, we recommend to add an additional type check:
If this a common case that PHP Analyzer should handle natively, please let us know by opening an issue.