/** * Decode the Maximum Length * * @param CDicomStreamReader $stream_reader The stream reader * * @return null */ function decodeItem(CDicomStreamReader $stream_reader) { $this->maximum_length = $stream_reader->readUInt32(); }
/** * Decode the value * * @param CDicomStreamReader $stream_reader The stream reader * @param string $endianness The endianness, must be equal to "BE" (Big Endian) or "LE" (Little Endian) * * @return null * * @todo traiter les cas FL, FD, OB, OW, OF, SQ */ protected function decodeValue(CDicomStreamReader $stream_reader, $endianness) { switch ($this->vr) { case 'AE': case 'AS': case 'CS': case 'DA': case 'DS': case 'DT': case 'FL': case 'FD': case 'IS': case 'LO': case 'LT': case 'OB': case 'OF': case 'OX': case 'OW': case 'PN': case 'SH': case 'ST': case 'TM': case 'UN': case 'UT': $this->value = $stream_reader->readString($this->length); break; case 'AT': $this->value = array(); $this->value[] = $stream_reader->readUInt16($endianness); $this->value[] = $stream_reader->readUInt16($endianness); break; case 'SL': $this->value = $stream_reader->readInt32($endianness); break; case 'SS': $this->value = $stream_reader->readInt16($endianness); break; case 'UI': $this->value = $stream_reader->readUID($this->length); break; case 'UL': $this->value = $stream_reader->readUInt32($endianness); break; case 'US': $this->value = $stream_reader->readUInt16($endianness); break; case 'SQ': $tmp_value = array(); $value_stream = new CDicomStreamReader(); /** Sequence of items with undefined length **/ if ($this->length == 0xffffffff) { $delimiter = new CDicomDataSet(); $delimiter->decode($stream_reader, $this->transfer_syntax); while ($delimiter->group_number == 0xfffe && $delimiter->element_number != 0xe0dd) { $sequence = array($delimiter); if ($delimiter->length == 0xffffffff) { $item_delimiter = new CDicomDataSet(); $item_delimiter->decode($stream_reader, $this->transfer_syntax); $sequence[] = $item_delimiter; while ($item_delimiter->group_number == 0xfffe && $item_delimiter->element_number != 0xe00d) { $dataset = new CDicomDataSet(); $dataset->decode($value_stream, $this->transfer_syntax); $sequence[] = $dataset; $item_delimiter = new CDicomDataSet(); $item_delimiter->decode($stream_reader, $this->transfer_syntax); $sequence[] = $item_delimiter; } } else { $sequence_end = $value_stream->getPos(); // + $sequence_length; while ($value_stream->getPos() < $sequence_end) { $dataset = new CDicomDataSet(); $dataset->decode($value_stream, $this->transfer_syntax); $sequence[] = $dataset; } } $delimiter = new CDicomDataSet(); $delimiter->decode($stream_reader, $this->transfer_syntax); $sequence[] = $delimiter; $tmp_value[] = $sequence; } } else { $content = $stream_reader->read($this->length); fwrite($value_stream->stream, $content, $this->length); $value_stream->rewind(); while ($value_stream->getPos() < $this->length) { $value_stream->skip(4); $sequence_length = $value_stream->readUInt32($endianness); $sequence = array(); $sequence_end = $value_stream->getPos() + $sequence_length; while ($value_stream->getPos() < $sequence_end) { $dataset = new CDicomDataSet(); $dataset->decode($value_stream, $this->transfer_syntax); $sequence[] = $dataset; } $tmp_value[] = $sequence; } } $this->value = $tmp_value; break; default: break; } }
/** * Check if the message is well formed * * @param string $msg The message * * @param CInteropActor $actor The actor who sent the message * * @return boolean */ function isWellFormed($msg, CInteropActor $actor = null) { $stream = fopen("php://temp", 'w+'); fwrite($stream, $msg); $stream_reader = new CDicomStreamReader($stream); $stream_reader->rewind(); $type = $stream_reader->readHexByte(); if ($type != "04") { $stream_reader->close(); return false; } $stream_reader->skip(1); $length = $stream_reader->readUInt32(); $stream_reader->close(); if (strlen($msg) != $length + 6) { return false; } return true; }
/** * Read the length of the PDU from the stream * * @param CDicomStreamReader $stream The stream reader * * @return integer */ static function readLength(CDicomStreamReader $stream) { return $stream->readUInt32(); }
/** * Decode the PDU * * @param CDicomStreamReader $stream_reader The stream reader * * @return null */ function decodePDU(CDicomStreamReader $stream_reader) { $this->pdvs = array(); $stream_reader->setStreamLength($this->getTotalLength()); while ($stream_reader->getPos() < $stream_reader->getStreamLength()) { $pdv_length = $stream_reader->readUInt32(); // + 4; //$stream_reader->seek(-4); $pdv_content = $stream_reader->read($pdv_length); $pdv_handle = fopen('php://temp', 'w+'); fwrite($pdv_handle, $pdv_content, $pdv_length); $pdv_stream = new CDicomStreamReader($pdv_handle); $pdv_stream->rewind(); $pdv = new CDicomPDV(array("presentation_contexts" => $this->presentation_contexts, "length" => $pdv_length)); $pdv->decode($pdv_stream); $this->pdvs[] = $pdv; } }