Vnum = Number(arg);
			if(arg === null) Vnum = 0/0;
			if(len == "L") bytes = 12;
			var isf/*:boolean*/ = isFinite(Vnum);
			if(!isf) { /* Infinity or NaN */
				if(Vnum < 0) O = "-";
				else if(flags.indexOf("+") > -1) O = "+";
				else if(flags.indexOf(" ") > -1) O = " ";
				O += (isnan(Vnum)) ? "nan" : "inf";
			} else {
				var E/*:number*/ = 0;

				if(prec == -1 && isnum != 4) prec = 6;

				/* g/G conditional behavior */
				if(isnum == 3) {
					O = Vnum.toExponential(1);
					E = +O.substr(O.indexOf("e") + 1);
					if(prec === 0) prec = 1;
					if(prec > E && E >= -4) { NUM(11); prec = prec -(E + 1); }
					else { NUM(12); prec = prec - 1; }
				}

				/* sign: workaround for negative zero */
				var sg/*:string*/ = (Vnum < 0 || 1/Vnum == -Infinity) ? "-" : "";
				if(Vnum < 0) Vnum = -Vnum;

				switch(isnum) {
					/* f/F standard */
					case 1: case 11:
						if(Vnum < 1e21) {
							O = Vnum.toFixed(prec);
							if(isnum == 1) { if(prec===0 &&alt&& O.indexOf(".")==-1) O+="."; }
							else if(!alt) O=O.replace(/(\.\d*[1-9])0*$/,"$1").replace(/\.0*$/,"");
							else if(O.indexOf(".") == -1) O+= ".";
							break;
						}
						O = Vnum.toExponential(20);
						E = +O.substr(O.indexOf("e")+1);
						O = O.charAt(0) + O.substr(2,O.indexOf("e")-2);
						O = O + PADS(E - O.length + 1, "0");
						if(alt || (prec > 0 && isnum !== 11)) O = O + "." + PADS(prec, "0");
						break;

					/* e/E exponential */
					case 2: case 12:
						O = Vnum.toExponential(prec);
						E = O.indexOf("e");
						if(O.length - E === 3) O = O.substr(0, E+2) + "0" + O.substr(E+2);
						if(alt && O.indexOf(".") == -1) O = O.substr(0,E) +"."+ O.substr(E);
						else if(!alt && isnum == 12) O = O.replace(/\.0*e/, "e").replace(/\.(\d*[1-9])0*e/, ".$1e");
						break;

					/* a/A hex */
					case 4:
						if(Vnum===0){O= "0x0"+((alt||prec>0)?"."+PADS(prec,"0"):"")+"p+0"; break;}
						O = Vnum.toString(16);
						/* First char 0-9 */
						var ac/*:number*/ = O.charCodeAt(0);
						if(ac == 48) {
							ac = 2; E = -4; Vnum *= 16;
							while(O.charCodeAt(ac++) == 48) { E -= 4; Vnum *= 16; }
							O = Vnum.toString(16);
							ac = O.charCodeAt(0);
						}

						var ai/*:number*/ = O.indexOf(".");
						if(O.indexOf("(") > -1) {
							/* IE exponential form */
							var am/*:?Array<any>*/ = O.match(/\(e(.*)\)/);
							var ae/*:number*/ = am ? (+am[1]) : 0;
							E += 4 * ae; Vnum /= Math.pow(16, ae);
						} else if(ai > 1) {
							E += 4 * (ai - 1); Vnum /= Math.pow(16, ai - 1);
						} else if(ai == -1) {
							E += 4 * (O.length - 1); Vnum /= Math.pow(16, O.length - 1);
						}

						/* at this point 1 <= Vnum < 16 */
#ifndef DO_NOT_NORMALIZE
						if(bytes > 8) {
							if(ac < 50) { E -= 3; Vnum *= 8; }
							else if(ac < 52) { E -= 2; Vnum *= 4; }
							else if(ac < 56) { E -= 1; Vnum *= 2; }
							/* at this point 8 <= Vnum < 16 */
						} else {
							if(ac >= 56) { E += 3; Vnum /= 8; }
							else if(ac >= 52) { E += 2; Vnum /= 4; }
							else if(ac >= 50) { E += 1; Vnum /= 2; }
							/* at this point 1 <= Vnum < 2 */
						}
#endif

						O = Vnum.toString(16);
						if(O.length > 1) {
							if(O.length > prec+2 && O.charCodeAt(prec+2) >= 56) {
								var _f/*:boolean*/ = O.charCodeAt(0) == 102;
								O = (Vnum + 8 * Math.pow(16, -prec-1)).toString(16);
								if(_f && O.charCodeAt(0) == 49) E += 4;
							}
							if(prec > 0) {
								O = O.substr(0, prec + 2);
								if(O.length < prec + 2) {
									if(O.charCodeAt(0) < 48) O = O.charAt(0) + PADS((prec + 2 - O.length), "0") + O.substr(1);
									else O += PADS((prec + 2 - O.length), "0");
								}
							} else if(prec === 0) O = O.charAt(0) + (alt ? "." : "");
						} else if(prec > 0) O = O + "." + PADS(prec,"0");
						else if(alt) O = O + ".";
						O = "0x" + O + "p" + (E>=0 ? "+" + E : E);
						break;
				}

				if(sg === "") {
					if(flags.indexOf("+") > -1) sg = "+";
					else if(flags.indexOf(" ") > -1) sg = " ";
				}

				O = sg + O;
			}

			/* width */
			if(width > O.length) {
				if(flags.indexOf("-") > -1) {
					O = O + PADS((width - O.length), " ");
				} else if(flags.indexOf("0") > -1 && O.length > 0 && isf) {
					pad = PADS((width - O.length), "0");
					if(O.charCodeAt(0) < 48) {
						if(O.charAt(2).toLowerCase() == "x") O = O.substr(0,3) + pad + O.substring(3);
						else O = O.substr(0,1) + pad + O.substring(1);
					}
					else if(O.charAt(1).toLowerCase() == "x") O = O.substr(0,2) + pad + O.substring(2);
					else O = pad + O;
				} else {
					O = PADS((width - O.length), " ") + O;
				}
			}
			if(c < 96) O = O.toUpperCase();