Gecko [ touzafair.com ]

Name	Size	Permission
QR8bitByte.js	382 B	-rw-r--r--
QRBitBuffer.js	702 B	-rw-r--r--
QRErrorCorrectLevel.js	54 B	-rw-r--r--
QRMaskPattern.js	157 B	-rw-r--r--
QRMath.js	673 B	-rw-r--r--
QRMode.js	149 B	-rw-r--r--
QRPolynomial.js	1.3 KB	-rw-r--r--
QRRSBlock.js	5.43 KB	-rw-r--r--
QRUtil.js	8.03 KB	-rw-r--r--
index.js	10.42 KB	-rw-r--r--

Code Editor : QRPolynomial.js

var QRMath = require('./QRMath');

function QRPolynomial(num, shift) {
	if (num.length === undefined) {
		throw new Error(num.length + "/" + shift);
	}

var offset = 0;

while (offset < num.length && num[offset] === 0) {
		offset++;
	}

this.num = new Array(num.length - offset + shift);
	for (var i = 0; i < num.length - offset; i++) {
		this.num[i] = num[i + offset];
	}
}

QRPolynomial.prototype = {

get : function(index) {
		return this.num[index];
	},
	
	getLength : function() {
		return this.num.length;
	},
	
	multiply : function(e) {
	
		var num = new Array(this.getLength() + e.getLength() - 1);
	
		for (var i = 0; i < this.getLength(); i++) {
			for (var j = 0; j < e.getLength(); j++) {
				num[i + j] ^= QRMath.gexp(QRMath.glog(this.get(i) ) + QRMath.glog(e.get(j) ) );
			}
		}
	
		return new QRPolynomial(num, 0);
	},
	
	mod : function(e) {
	
		if (this.getLength() - e.getLength() < 0) {
			return this;
		}
	
		var ratio = QRMath.glog(this.get(0) ) - QRMath.glog(e.get(0) );
	
		var num = new Array(this.getLength() );
		
		for (var i = 0; i < this.getLength(); i++) {
			num[i] = this.get(i);
		}
		
		for (var x = 0; x < e.getLength(); x++) {
			num[x] ^= QRMath.gexp(QRMath.glog(e.get(x) ) + ratio);
		}
	
		// recursive call
		return new QRPolynomial(num, 0).mod(e);
	}
};

module.exports = QRPolynomial;

${this.title}

Code Editor : QRPolynomial.js