Complex CSV Parser

gistfile1.js

function parseCSV(input, separator, quote) {  
	separator = separator || ',';
	quote = quote || '"';
	var  tempWord ='', c ='', temp = [],
	closingPosition, result =[], specialCharacters = '$\\',
	doubleQuoteRegex = new RegExp(quote+quote, 'g');

	if (specialCharacters.indexOf(quote) > -1) {
		doubleQuoteRegex = new RegExp('\\' +quote+ '\\' +quote, 'g');
	};
	//This will replace the double quote just for one and ignore first and last quote
	String.prototype.clear = function(){
		var self = this +'';
		var tempClean = self.replace(doubleQuoteRegex,quote);
		if (tempClean[0] === quote) {
			tempClean = tempClean.slice(1);
		};
		if (tempClean[tempClean.length-1] == quote) {
			tempClean = tempClean.slice(0,self.length-1);
		};
		return tempClean;
	};
	//Helper to get the next quote input
	var appendAndPushNext = function(position,noPush){
		var tempInput = input.slice(0, closingPosition);
		temp.push(tempInput.clear());
		if (!noPush) {
			result.push(temp);
			temp =[];
		};		
		input = input.slice(closingPosition+position);
	}

	do{
		c = input[0];
		if(c == quote){
			closingPosition = input.indexOf(quote + separator,1);
			if (closingPosition === -1) {
				closingPosition = input.indexOf(quote + '\n',1);
				if (closingPosition === -1) {
					closingPosition = input.indexOf(quote,1);
					appendAndPushNext(1);
				} else{
					appendAndPushNext(2);//ignoring "+separator or "+\n
				};
			} else {
				appendAndPushNext(2, true);//ignoring "+separator or "+\n
			}		
		} else if (c == separator || (c === '\n')) {
			temp.push(tempWord);
			tempWord = '';
			input = input.slice(1);
			if (c === '\n') {
				result.push(temp);
				temp=[];
			};
		} else {
			tempWord+=c;
			input = input.slice(1)
		} 
	} while(input.length);

	if (temp.length > 0) {
		temp.push(tempWord);
		result.push(temp);
	};
		return result.length === 0 ? [[""]] : result; //If it's equal zero is an empty input    
}


/*	
console.log(parseCSV('1,2,3'));
console.log(parseCSV('one,"two wraps\nonto ""two"" lines",three\n4,,6'));
console.log(parseCSV('1,2,3,4,5,6\n7,8\n9,10,11,12'))
console.log(parseCSV('1,2,3\n\n4,5,6'))
console.log(parseCSV(''))
console.log(parseCSV('one,",,,,,..two,,,,,\n,,,,,,",three\n4,,6'));
console.log(parseCSV('1,"two ""quote""",3\n4,5,6'));
//Expected: [["1","2","3\tthree"],["4","5","6"]]
console.log(parseCSV('1	2	"3	three"\n4	5	6', '	'));
//Expected: [["a $string$ using $ as the quote","multi\nline",""],["1.2","3","4"]]
console.log(parseCSV('$a $$string$$ using $$ as the quote$.$multi\nline$.\n$1.2$.3.4','.','$'))
//Expected: [["a \\string\\ using \\ as the quote","multi\nline",""],["1","2","3.4"]]
console.log(parseCSV('\\a \\\\string\\\\ using \\\\ as the quote\\.\\multi\nline\\.\n1.2.\\3.4\\','.','\\'));
*/