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<?php
/**
* BCGcode39.barcode.php
*--------------------------------------------------------------------
*
* Sub-Class - Code 39
*
*--------------------------------------------------------------------
* Revision History
* v2.0.0 23 apr 2008 Jean-Sébastien Goupil New Version Update
* v1.2.3b 30 dec 2005 Jean-Sébastien Goupil Checksum separated + PHP5.1 compatible
* v1.2.1 27 jun 2005 Jean-Sébastien Goupil Font support added
* v1.01 7 jul 2004 Jean-Sebastien Goupil Correction + Sign
* V1.00 17 jun 2004 Jean-Sebastien Goupil
*--------------------------------------------------------------------
* $Id: BCGcode39.barcode.php,v 1.10 2009/11/09 04:08:41 jsgoupil Exp $
*--------------------------------------------------------------------
* Copyright (C) Jean-Sebastien Goupil
* http://www.barcodephp.com
*/
include_once('BCGBarcode1D.php');
class BCGcode39 extends BCGBarcode1D {
protected $starting, $ending;
protected $checksum;
/**
* Constructor
*/
public function __construct() {
parent::__construct();
$this->starting = $this->ending = 43;
$this->keys = array('0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z','-','.',' ','$','/','+','%','*');
$this->code = array( // 0 added to add an extra space
'0001101000', /* 0 */
'1001000010', /* 1 */
'0011000010', /* 2 */
'1011000000', /* 3 */
'0001100010', /* 4 */
'1001100000', /* 5 */
'0011100000', /* 6 */
'0001001010', /* 7 */
'1001001000', /* 8 */
'0011001000', /* 9 */
'1000010010', /* A */
'0010010010', /* B */
'1010010000', /* C */
'0000110010', /* D */
'1000110000', /* E */
'0010110000', /* F */
'0000011010', /* G */
'1000011000', /* H */
'0010011000', /* I */
'0000111000', /* J */
'1000000110', /* K */
'0010000110', /* L */
'1010000100', /* M */
'0000100110', /* N */
'1000100100', /* O */
'0010100100', /* P */
'0000001110', /* Q */
'1000001100', /* R */
'0010001100', /* S */
'0000101100', /* T */
'1100000010', /* U */
'0110000010', /* V */
'1110000000', /* W */
'0100100010', /* X */
'1100100000', /* Y */
'0110100000', /* Z */
'0100001010', /* - */
'1100001000', /* . */
'0110001000', /* */
'0101010000', /* $ */
'0101000100', /* / */
'0100010100', /* + */
'0001010100', /* % */
'0100101000' /* * */
);
$this->setChecksum(false);
}
public function setChecksum($checksum) {
$this->checksum = (bool)$checksum;
}
/**
* Saves Text
*
* @param string $text
*/
public function parse($text) {
parent::parse(strtoupper($text)); // Only Capital Letters are Allowed
}
/**
* Draws the barcode
*
* @param resource $im
*/
public function draw(&$im) {
$error_stop = false;
// Checking if all chars are allowed
$c = strlen($this->text);
for ($i = 0; $i < $c; $i++) {
if (array_search($this->text[$i], $this->keys) === false) {
$this->drawError($im, 'Char \'' . $this->text[$i] . '\' not allowed.');
$error_stop = true;
}
}
if ($error_stop === false) {
// The * is not allowed
if (strpos($this->text, '*') !== false) {
$this->drawError($im, 'Char \'*\' not allowed.');
$error_stop = true;
}
if ($error_stop === false) {
// Starting *
$this->drawChar($im, $this->code[$this->starting], true);
// Chars
for ($i = 0; $i < $c; $i++) {
$this->drawChar($im, $this->findCode($this->text[$i]), true);
}
// Checksum (rarely used)
if ($this->checksum === true) {
$this->calculateChecksum();
$this->drawChar($im, $this->code[$this->checksumValue % 43], true);
}
// Ending *
$this->drawChar($im, $this->code[$this->ending], true);
$this->drawText($im);
}
}
}
/**
* Returns the maximal size of a barcode
*
* @return int[]
*/
public function getMaxSize() {
$p = parent::getMaxSize();
$textlength = 13 * strlen($this->text) * $this->scale;
$startlength = 13 * $this->scale;
$checksumlength = 0;
if ($this->checksum === true) {
$checksumlength = 13 * $this->scale;
}
$endlength = 13 * $this->scale;
return array($p[0] + $startlength + $textlength + $checksumlength + $endlength, $p[1]);
}
/**
* Overloaded method to calculate checksum
*/
protected function calculateChecksum() {
$this->checksumValue = 0;
$c = strlen($this->text);
for ($i = 0; $i < $c; $i++) {
$this->checksumValue += $this->findIndex($this->text[$i]);
}
$this->checksumValue = $this->checksumValue % 43;
}
/**
* Overloaded method to display the checksum
*/
protected function processChecksum() {
if ($this->checksumValue === false) { // Calculate the checksum only once
$this->calculateChecksum();
}
if ($this->checksumValue !== false) {
return $this->keys[$this->checksumValue];
}
return false;
}
};
?>
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