[Javascript] _seqParser

JS_seqParser.js

//--------------------------------
// zero padding
//--------------------------------
function _padding(val,n)
{
	n -= (''+val).length-1;
	return((n>0?(new Array(n)).join('0'):'')+val);
}
//--------------------------------
// examples:
// "c##(1,3)" or "c##(1:3)" or "c##(1-3)" -> ["c01", "c02", "c03"]
// "c#(1,30,10)" -> ["c1", "c11", "c21"]
// "s##(1,2)_c###(1,3)_A"
// -> ["s01_c01_A", "s01_c02_A", "s01_c03_A", "s02_c01_A", "s02_c02_A", "s02_c03_A"]
//--------------------------------
function _seqParser(str)
{
	var ret = [""];

	var p = 0;
	var re = RegExp(/(#+)\(([0-9][0-9 :,\-]*)\)/g);
	while(m = re.exec(str))
	{
		if(m.length < 3) continue;
		var pre = str.substring(p, m.index);
		var r = m[2].replace(/ /g, "").replace(/[,\-]/g, ":");
		r = r.split(":"); //string -> array
		var fs = parseInt(r[0]);
		var fe = r.length < 2 ? fs : parseInt(r[1]);
		var fb = r.length < 3 ? 1 : parseInt(r[2]);
		var buf = [];
		for(var j=0; j< ret.length; j++){
			for(var i=fs; i<= fe; i += fb){
				buf.push(ret[j] + pre + _padding(i, m[1].length));
			}
		}
		ret = buf;
		p = m.index + m[1].length + m[2].length + 2;
	}
	for(var j=0; j< ret.length; j++) ret[j] += str.substring(p);

	return(ret);
}