if(c >= 48 && c < 58)	{
				if(fmtprec.length) fmtprec += String.fromCharCode(c);
				else if(c == 48 && !fmtwidth.length) fmtflags += String.fromCharCode(c);
				else fmtwidth += String.fromCharCode(c);
		} else switch(c) {
			/* positional */
			case 36:
				if(fmtprec.length) fmtprec += "$";
				else if(fmtwidth.charAt(0) == "*") fmtwidth += "$";
				else { fmtparam = fmtwidth + "$"; fmtwidth = ""; }
				break;

			/* flags */
			case 39: fmtflags += "'"; break;
			case 45: fmtflags += "-"; break;
			case 43: fmtflags += "+"; break;
			case 32: fmtflags += " "; break;
			case 35: fmtflags += "#"; break;

			/* width and precision */
			case 46: fmtprec = "."; break;
			case 42:
				if(fmtprec.charAt(0) == ".") fmtprec += "*";
				else fmtwidth += "*";
				break;

			/* length */
			case 104:
			case 108:
				if(fmtlen.length > 1) throw "bad length " + fmtlen + String(c);
				fmtlen += String.fromCharCode(c);
				break;

			case  76:
			case 106:
			case 122:
			case 116:
			case 113:
			case  90:
			case 119:
				if(fmtlen !== "") throw "bad length " + fmtlen + String.fromCharCode(c);
				fmtlen = String.fromCharCode(c);
				break;

			case 73:
				if(fmtlen !== "") throw "bad length " + fmtlen + 'I';
				fmtlen = 'I';
				break;

			/* conversion */
			case 100:
			case 105:
			case 111:
			case 117:
			case 120:
			case 88:
			case 102:
			case 70:
			case 101:
			case 69:
			case 103:
			case 71:
			case 97:
			case 65:
			case 99:
			case 67:
			case 115:
			case 83:
			case 112:
			case 110:
			case 68:
			case 85:
			case 79:
			case 109:
			case 98:
			case 66:
			case 121:
			case 89:
			case 74:
			case 86:
			case 84:
			case 37:
				infmt = false;
				if(fmtprec.length > 1) fmtprec = fmtprec.substr(1);
				out.push([String.fromCharCode(c), fmt.substring(start, i+1), fmtparam, fmtflags, fmtwidth, fmtprec, fmtlen]);
				start = i+1;
				fmtlen = fmtprec = fmtwidth = fmtflags = fmtparam = "";
				break;
			default:
				throw new Error("Invalid format string starting with |" + fmt.substring(start, i+1) + "|");
		}