Illustrator's path -> Type2Charstring array.

pathExamine.jsx

function pathExamine(tg) {
	var baseline = 120; //global preset
	var stck = [];
	var crnt = []
	stck.push(Math.round(tg.pathPoints[0].anchor[0]));
	stck.push(Math.round(tg.pathPoints[0].anchor[1]+1000 -baseline));
	var prv = stck;
	stck.push("rmoveto");
	for (var i=0;i<tg.pathPoints.length;i++){
		crnt = [Math.round(tg.pathPoints[i].rightDirection[0]), 
				Math.round(tg.pathPoints[i].rightDirection[1]+1000 -baseline)];
		stck.push(crnt[0] - prv[0]);
		stck.push(crnt[1] - prv[1]);
		prv = crnt;
		if (i==tg.pathPoints.length-1){
			crnt = [Math.round(tg.pathPoints[0].leftDirection[0]), 
					Math.round(tg.pathPoints[0].leftDirection[1]+1000 -baseline)];
			stck.push(crnt[0] - prv[0]);
			stck.push(crnt[1] - prv[1]);
			prv = crnt;
			crnt = [Math.round(tg.pathPoints[0].anchor[0]), 
					Math.round(tg.pathPoints[0].anchor[1]+1000 -baseline)];
			stck.push(crnt[0] - prv[0]);
			stck.push(crnt[1] - prv[1]);
			stck.push("rrcurveto");
			stck.push("endchar");
			}
		else {
			crnt = [Math.round(tg.pathPoints[i+1].leftDirection[0]), 
					Math.round(tg.pathPoints[i+1].leftDirection[1]+1000 -baseline)];
			stck.push(crnt[0] - prv[0]);
			stck.push(crnt[1] - prv[1]);
			prv = crnt;
			crnt = [Math.round(tg.pathPoints[i+1].anchor[0]), 
					Math.round(tg.pathPoints[i+1].anchor[1]+1000 -baseline)];
			stck.push(crnt[0] - prv[0]);
			stck.push(crnt[1] - prv[1]);
			stck.push("rrcurveto");
			prv = crnt;
			}
		}
	return stck;
	}

Give a target PathItem and call it. You can get Type2Charstring array.