Datamatrix::__construct()

Complexity

Conditions	28
Paths	356

Size

Total Lines	110
Code Lines	63

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

<?php
	public function __construct($code) {
		$barcode_array = array();

The assignment to $barcode_array is dead and can be removed.

		if ((is_null($code)) OR ($code == '\0') OR ($code == '')) {
			return false;
		}
		// get data codewords
		$cw = $this->getHighLevelEncoding($code);
		// number of data codewords
		$nd = count($cw);
		// check size
		if ($nd > 1558) {
			return false;
		}
		// get minimum required matrix size.
		foreach ($this->symbattr as $params) {
			if ($params[11] >= $nd) {
				break;
			}
		}
		if ($params[11] < $nd) {

The variable $params seems to be defined by a foreach iteration on line 249. Are you sure the iterator is never empty, otherwise this variable is not defined?

			// too much data
			return false;
		} elseif ($params[11] > $nd) {
			// add padding
			if ((($params[11] - $nd) > 1) AND ($cw[($nd - 1)] != 254)) {
				if ($this->last_enc == ENC_EDF) {
					// switch to ASCII encoding
					$cw[] = 124;
					++$nd;
				} elseif (($this->last_enc != ENC_ASCII) AND ($this->last_enc != ENC_BASE256)) {
					// switch to ASCII encoding
					$cw[] = 254;
					++$nd;
				}
			}
			if ($params[11] > $nd) {
				// add first pad
				$cw[] = 129;
				++$nd;
				// add remaining pads
				for ($i = $nd; $i < $params[11]; ++$i) {
					$cw[] = $this->get253StateCodeword(129, $i);
				}
			}
		}
		// add error correction codewords
		$cw = $this->getErrorCorrection($cw, $params[13], $params[14], $params[15]);
		// initialize empty arrays
		$grid = array_fill(0, ($params[2] * $params[3]), 0);

The assignment to $grid is dead and can be removed.

		// get placement map
		$places = $this->getPlacementMap($params[2], $params[3]);
		// fill the grid with data
		$grid = array();
		$i = 0;
		// region data row max index
		$rdri = ($params[4] - 1);
		// region data column max index
		$rdci = ($params[5] - 1);
		// for each vertical region
		for ($vr = 0; $vr < $params[9]; ++$vr) {
			// for each row on region
			for ($r = 0; $r < $params[4]; ++$r) {
				// get row
				$row = (($vr * $params[4]) + $r);
				// for each horizontal region
				for ($hr = 0; $hr < $params[8]; ++$hr) {
					// for each column on region
					for ($c = 0; $c < $params[5]; ++$c) {
						// get column
						$col = (($hr * $params[5]) + $c);
						// braw bits by case
						if ($r == 0) {
							// top finder pattern
							if ($c % 2) {
								$grid[$row][$col] = 0;
							} else {
								$grid[$row][$col] = 1;
							}
						} elseif ($r == $rdri) {
							// bottom finder pattern
							$grid[$row][$col] = 1;
						} elseif ($c == 0) {
							// left finder pattern
							$grid[$row][$col] = 1;
						} elseif ($c == $rdci) {
							// right finder pattern
							if ($r % 2) {
								$grid[$row][$col] = 1;
							} else {
								$grid[$row][$col] = 0;
							}
						} else { // data bit
							if ($places[$i] < 2) {
								$grid[$row][$col] = $places[$i];
							} else {
								// codeword ID
								$cw_id = (floor($places[$i] / 10) - 1);
								// codeword BIT mask
								$cw_bit = pow(2, (8 - ($places[$i] % 10)));
								$grid[$row][$col] = (($cw[$cw_id] & $cw_bit) == 0) ? 0 : 1;
							}
							++$i;
						}
					}
				}
			}
		}
		$this->barcode_array['num_rows'] = $params[0];
		$this->barcode_array['num_cols'] = $params[1];
		$this->barcode_array['bcode'] = $grid;
	}