diff --git a/bits/10_ssf.js b/bits/10_ssf.js
index b0822cf..c48f4d4 100644
--- a/bits/10_ssf.js
+++ b/bits/10_ssf.js
@@ -1,7 +1,7 @@
 /* Spreadsheet Format -- jump to XLSX for the XLSX code */
-if(typeof require !== "undefined") SSF = require('ssf');
-var SSF = (function() {
-	var SSF = {};
+/* ssf.js (C) 2013 SheetJS -- http://sheetjs.com */
+var SSF = {};
+var make_ssf = function(SSF){
 String.prototype.reverse=function(){return this.split("").reverse().join("");};
 var _strrev = function(x) { return String(x).reverse(); };
 function fill(c,l) { return new Array(l+1).join(c); }
@@ -23,7 +23,7 @@ var table_fmt = {
 	11: '0.00E+00',
 	12: '# ?/?',
 	13: '# ??/??',
-	14: 'mm/dd/yy',
+  14: 'm/d/yy',
 	15: 'd-mmm-yy',
 	16: 'd-mmm',
 	17: 'mmm-yy',
@@ -65,15 +65,48 @@ var months = [
 	['N', 'Nov', 'November'],
 	['D', 'Dec', 'December']
 ];
+var frac = function(x, D, mixed) {
+  var n1 = Math.floor(x), d1 = 1;
+  var n2 = n1+1, d2 = 1;
+  if(x !== n1) while(d1 <= D && d2 <= D) {
+    var m = (n1 + n2) / (d1 + d2);
+    if(x === m) {
+      if(d1 + d2 <= D) { d1+=d2; n1+=n2; d2=D+1; }
+      else if(d1 > d2) d2=D+1;
+      else d1=D+1;
+      break;
+    }
+    else if(x < m) { n2 = n1+n2; d2 = d1+d2; }
+    else { n1 = n1+n2; d1 = d1+d2; }
+  }
+  if(d1 > D) { d1 = d2; n1 = n2; }
+  if(!mixed) return [0, n1, d1];
+  var q = Math.floor(n1/d1);
+  return [q, n1 - q*d1, d1];
+};
 var general_fmt = function(v) {
 	if(typeof v === 'boolean') return v ? "TRUE" : "FALSE";
+  if(typeof v === 'number') {
+    var o, V = v < 0 ? -v : v;
+    if(V >= 0.1 && V < 1) o = v.toPrecision(9);
+    else if(V >= 0.01 && V < 0.1) o = v.toPrecision(8);
+    else if(V >= 0.001 && V < 0.01) o = v.toPrecision(7);
+    else if(V > Math.pow(10,-9) && V < Math.pow(10,10)) {
+      o = v.toPrecision(10); if(o.length > 11+(v<0?1:0)) o = v.toExponential(5);
+    } 
+    else o = v.toPrecision(6);
+    return o.replace("e","E").replace(/\.0*$/,"").replace(/\.(.*[^0])0*$/,".$1").replace(/(E[+-])([0-9])$/,"$1"+"0"+"$2");
+  }
+  if(typeof v === 'string') return v;
+  throw "unsupported value in General format: " + v;
 };
 SSF._general = general_fmt;
 var parse_date_code = function parse_date_code(v,opts) {
 	var date = Math.floor(v), time = Math.round(86400 * (v - date)), dow=0;
-	var dout=[], out={D:date, T:time}; fixopts(opts = (opts||{}));
+  var dout=[], out={D:date, T:time, u:86400*(v-date)-time}; fixopts(opts = (opts||{}));
 	if(opts.date1904) date += 1462;
 	if(date === 60) {dout = [1900,2,29]; dow=3;}
+  else if(date === 0) {dout = [1900,1,0]; dow=6;}
 	else {
 		if(date > 60) --date;
 		/* 1 = Jan 1 1900 */
@@ -92,6 +125,7 @@ var parse_date_code = function parse_date_code(v,opts) {
 };
 SSF.parse_date_code = parse_date_code;
 var write_date = function(type, fmt, val) {
+  if(val < 0) return "";
 	switch(type) {
 		case 'y': switch(fmt) { /* year */
 			case 'y': case 'yy': return pad(val.y % 100,2);
@@ -130,19 +164,76 @@ var write_date = function(type, fmt, val) {
 		case 's': switch(fmt) { /* seconds */
 			case 's': return val.S;
 			case 'ss': return pad(val.S, 2);
+      case 'ss.0': return pad(val.S,2) + "." + Math.round(10*val.u);
 			default: throw 'bad second format: ' + fmt;
 		} break;
+    case 'Z': switch(fmt) {
+      case '[h]': return val.D*24+val.H;
+      default: throw 'bad abstime format: ' + fmt;
+    } break;
 		/* TODO: handle the ECMA spec format ee -> yy */
 		case 'e': { return val.y; } break;
 		case 'A': return (val.h>=12 ? 'P' : 'A') + fmt.substr(1);
 		default: throw 'bad format type ' + type + ' in ' + fmt;
 	}
 };
+String.prototype.reverse = function() { return this.split("").reverse().join(""); };
+var commaify = function(s) { return s.reverse().replace(/.../g,"$&,").reverse().replace(/^,/,""); };
+var write_num = function(type, fmt, val) {
+  if(type === '(') {
+    var ffmt = fmt.replace(/\( */,"").replace(/ \)/,"").replace(/\)/,"");
+    if(val >= 0) return write_num('n', ffmt, val);
+    return '(' + write_num('n', ffmt, -val) + ')';
+  }
+  var mul = 0, o;
+  fmt = fmt.replace(/%/g,function(x) { mul++; return ""; });
+  if(mul !== 0) return write_num(type, fmt, val * Math.pow(10,2*mul)) + fill("%",mul);
+  if(fmt.indexOf("E") > -1) {
+    var idx = fmt.indexOf("E") - fmt.indexOf(".") - 1;
+    if(fmt == '##0.0E+0') {
+      var ee = Number(val.toExponential(0).substr(3))%3;
+      o = (val/Math.pow(10,ee%3)).toPrecision(idx+1+(ee%3)).replace(/^([+-]?)([0-9]*)\.([0-9]*)[Ee]/,function($$,$1,$2,$3) { return $1 + $2 + $3.substr(0,ee) + "." + $3.substr(ee) + "E"; });
+    } else o = val.toExponential(idx);
+    if(fmt.match(/E\+00$/) && o.match(/e[+-][0-9]$/)) o = o.substr(0,o.length-1) + "0" + o[o.length-1];
+    if(fmt.match(/E\-/) && o.match(/e\+/)) o = o.replace(/e\+/,"e");
+    return o.replace("e","E");
+  }
+  if(fmt[0] === "$") return "$"+write_num(type,fmt.substr(fmt[1]==' '?2:1),val);
+  var r, ff, aval = val < 0 ? -val : val, sign = val < 0 ? "-" : "";
+  switch(fmt) {
+    case "0": return Math.round(val);
+    case "0.0": o = Math.round(val*10);
+      return String(o/10).replace(/^([^\.]+)$/,"$1.0").replace(/\.$/,".0");
+    case "0.00": o = Math.round(val*100);
+      return String(o/100).replace(/^([^\.]+)$/,"$1.00").replace(/\.$/,".00").replace(/\.([0-9])$/,".$1"+"0");
+    case "0.000": o = Math.round(val*1000);
+      return String(o/1000).replace(/^([^\.]+)$/,"$1.000").replace(/\.$/,".000").replace(/\.([0-9])$/,".$1"+"00").replace(/\.([0-9][0-9])$/,".$1"+"0");
+    case "#,##0": return sign + commaify(String(Math.round(aval)));
+    case "#,##0.0": r = Math.round((val-Math.floor(val))*10); return val < 0 ? "-" + write_num(type, fmt, -val) : commaify(String(Math.floor(val))) + "." + r;
+    case "#,##0.00": r = Math.round((val-Math.floor(val))*100); return val < 0 ? "-" + write_num(type, fmt, -val) : commaify(String(Math.floor(val))) + "." + (r < 10 ? "0"+r:r);
+    case "# ? / ?": ff = frac(val<0?-val:val, 10, true); return (val<0?"-":"") + ff[0] + " " + ff[1] + "/" + ff[2];
+    case "# ?? / ??": ff = frac(val<0?-val:val, 100, true); return (val<0?"-":"") + ff[0] + " " + ff[1] + "/" + ff[2];
+    default:
+  }
+  throw new Error("unsupported format |" + fmt + "|");
+};
 function split_fmt(fmt) {
-	return fmt.reverse().split(/;(?!\\)/).reverse().map(_strrev);
+  var out = [];
+  var in_str = -1;
+  for(var i = 0, j = 0; i < fmt.length; ++i) {
+    if(in_str != -1) { if(fmt[i] == '"') in_str = -1; continue; }
+    if(fmt[i] == "_" || fmt[i] == "*" || fmt[i] == "\\") { ++i; continue; }
+    if(fmt[i] == '"') { in_str = i; continue; }
+    if(fmt[i] != ";") continue;
+    out.push(fmt.slice(j,i));
+    j = i+1;
+  }
+  out.push(fmt.slice(j));
+  if(in_str !=-1) throw "Format |" + fmt + "| unterminated string at " + in_str;
+  return out;
 }
 SSF._split = split_fmt;
-function eval_fmt(fmt, v, opts) {
+function eval_fmt(fmt, v, opts, flen) {
 	var out = [], o = "", i = 0, c = "", lst='t', q = {}, dt;
 	fixopts(opts = (opts || {}));
 	var hr='H';
@@ -150,15 +241,19 @@ function eval_fmt(fmt, v, opts) {
 	while(i < fmt.length) {
 		switch((c = fmt[i])) {
 			case '"': /* Literal text */
-				for(o="";fmt[++i] !== '"';) o += fmt[(fmt[i] === '\\' ? ++i : i)];
-				out.push({t:'t', v:o}); break;
-			case '\\': out.push({t:'t', v:fmt[++i]}); ++i; break;
+        for(o="";fmt[++i] !== '"';) o += fmt[i];
+        out.push({t:'t', v:o}); ++i; break;
+      case '\\': var w = fmt[++i], t = "()".indexOf(w) === -1 ? 't' : w;
+        out.push({t:t, v:w}); ++i; break;
+      case '_': out.push({t:'t', v:" "}); i+=2; break;
 			case '@': /* Text Placeholder */
 				out.push({t:'T', v:v}); ++i; break;
 			/* Dates */
 			case 'm': case 'd': case 'y': case 'h': case 's': case 'e':
+        if(v < 0) return "";
 				if(!dt) dt = parse_date_code(v, opts);
 				o = fmt[i]; while(fmt[++i] === c) o+=c;
+        if(c === 's' && fmt[i] === '.' && fmt[i+1] === '0') { o+='.'; while(fmt[++i] === '0') o+= '0'; }
 				if(c === 'm' && lst.toLowerCase() === 'h') c = 'M'; /* m = minute */
 				if(c === 'h') c = hr;
 				q={t:c, v:o}; out.push(q); lst = c; break;
@@ -170,13 +265,27 @@ function eval_fmt(fmt, v, opts) {
 				else q.t = "t";
 				out.push(q); lst = c; break;
 			case '[': /* TODO: Fix this -- ignore all conditionals and formatting */
-				while(fmt[i++] !== ']'); break;
+        o = c;
+        while(fmt[i++] !== ']') o += fmt[i];
+        if(o == "[h]") out.push({t:'Z', v:o});
+        break;
+      /* Numbers */
+      case '0': case '#':
+        var nn = c; while("0#?.,E+-%".indexOf(c=fmt[++i]) > -1) nn += c;
+        out.push({t:'n', v:nn}); break;
+      case '?':
+        o = fmt[i]; while(fmt[++i] === c) o+=c;
+        q={t:c, v:o}; out.push(q); lst = c; break;
+      case '*': ++i; if(fmt[i] == ' ') ++i; break; // **
+      case '(': case ')': out.push({t:(flen===1?'t':c),v:c}); ++i; break;
+      case ' ': out.push({t:c,v:c}); ++i; break;
 			default:
-				if("$-+/():!^&'~{}<>= ".indexOf(c) === -1)
+        if("$-+/():!^&'~{}<>=".indexOf(c) === -1)
 					throw 'unrecognized character ' + fmt[i] + ' in ' + fmt;
 				out.push({t:'t', v:c}); ++i; break;
 		}
 	}
+
 	/* walk backwards */
 	for(i=out.length-1, lst='t'; i >= 0; --i) {
 		switch(out[i].t) {
@@ -189,10 +298,19 @@ function eval_fmt(fmt, v, opts) {
 	/* replace fields */
 	for(i=0; i < out.length; ++i) {
 		switch(out[i].t) {
-			case 't': case 'T': break;
-			case 'd': case 'm': case 'y': case 'h': case 'H': case 'M': case 's': case 'A': case 'e':
+      case 't': case 'T': case ' ': break;
+      case 'd': case 'm': case 'y': case 'h': case 'H': case 'M': case 's': case 'A': case 'e': case 'Z':
 				out[i].v = write_date(out[i].t, out[i].v, dt);
 				out[i].t = 't'; break;
+      case 'n': case '(':
+        var jj = i+1;
+        while(out[jj] && (out[jj].t == '?' || out[jj].t == ' ' || out[i].t == '(' && (out[jj].t == ')' || out[jj].t == 'n') || out[jj].t == 't' && (out[jj].v == '/' || out[jj].v == '$'))) {
+          if(out[jj].v!==' ') out[i].v += ' ' + out[jj].v;
+          delete out[jj]; ++jj;
+        }
+        out[i].v = write_num(out[i].t, out[i].v, v);
+        out[i].t = 't';
+        i = jj; break;
 			default: throw "unrecognized type " + out[i].t;
 		}
 	}
@@ -200,23 +318,31 @@ function eval_fmt(fmt, v, opts) {
 	return out.map(function(x){return x.v;}).join("");
 }
 SSF._eval = eval_fmt;
-function choose_fmt(fmt, v) {
+function choose_fmt(fmt, v, o) {
+  if(typeof fmt === 'number') fmt = table_fmt[fmt];
 	if(typeof fmt === "string") fmt = split_fmt(fmt);
-	if(typeof v !== "number") return fmt[3];
-	return v > 0 ? fmt[0] : v < 0 ? fmt[1] : fmt[2];
+  var l = fmt.length;
+  switch(fmt.length) {
+    case 1: fmt = [fmt[0], fmt[0], fmt[0], "@"]; break;
+    case 2: fmt = [fmt[0], fmt[1], fmt[0], "@"]; break;
+    case 4: break;
+    default: throw "cannot find right format for |" + fmt + "|";
+  }
+  if(typeof v !== "number") return [fmt.length, fmt[3]];
+  return [l, v > 0 ? fmt[0] : v < 0 ? fmt[1] : fmt[2]];
 }
 
 var format = function format(fmt,v,o) {
 	fixopts(o = (o||{}));
 	if(fmt === 0) return general_fmt(v, o);
-	if(typeof fmt === 'number') fmt = table_fmt[fmt];
+  fmt = table_fmt[fmt];
 	var f = choose_fmt(fmt, v, o);
-	return eval_fmt(f, v, o);
+  return eval_fmt(f[1], v, o, f[0]);
 };
 
 SSF._choose = choose_fmt;
 SSF._table = table_fmt;
 SSF.load = function(fmt, idx) { table_fmt[idx] = fmt; };
 SSF.format = format;
-	return SSF;
-})();
+};
+make_ssf(SSF);
diff --git a/package.json b/package.json
index 51a0dd0..9e164e2 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "xlsx",
-	"version": "0.3.3",
+	"version": "0.3.4",
 	"author": "sheetjs",
 	"description": "(one day) a full-featured XLSX parser and writer.  For now, primitive parser",
 	"keywords": [ "xlsx", "office", "excel", "spreadsheet" ],
diff --git a/tests.lst b/tests.lst
index 5ce330d..7fa2335 100644
--- a/tests.lst
+++ b/tests.lst
@@ -1,9 +1,9 @@
 45430.xlsx
-45540_classic_Footer.xlsx.pending
-45540_classic_Header.xlsx.pending
+45540_classic_Footer.xlsx
+45540_classic_Header.xlsx
 45540_form_Footer.xlsx
 45540_form_Header.xlsx
-45544.xlsx.pending
+45544.xlsx
 46535.xlsx
 46536.xlsx
 47090.xlsx
@@ -20,12 +20,12 @@
 48779.xlsx
 48923.xlsx
 49156.xlsx
-49273.xlsx.pending
+49273.xlsx
 49325.xlsx
 49609.xlsx
 49783.xlsx
 49872.xlsx
-49928.xlsx.pending
+49928.xlsx
 49966.xlsx
 50096.xlsx
 50299.xlsx
@@ -55,8 +55,9 @@
 54436.xlsx
 54524.xlsx
 54607.xlsx
-55640.xlsx.pending
-55745.xlsx.pending
+55640.xlsx
+55745.xlsx
+55850.xlsx
 AverageTaxRates.xlsx
 Booleans.xlsx
 BrNotClosed.xlsx
@@ -70,10 +71,10 @@ ElapsedFormatTests.xlsx
 ForShifting.xlsx
 FormatChoiceTests.xlsx
 FormatConditionTests.xlsx
-Formatting.xlsx.pending
-FormulaEvalTestData_Copy.xlsx.pending
+Formatting.xlsx
+FormulaEvalTestData_Copy.xlsx
 GeneralFormatTests.xlsx
-GroupTest.xlsx.pending
+GroupTest.xlsx
 InlineStrings.xlsx
 NewlineInFormulas.xlsx
 NumberFormatApproxTests.xlsx
@@ -113,7 +114,7 @@ excel-reader-xlsx_error07.xlsx.pending
 excel-reader-xlsx_error08.xlsx.pending
 excel-reader-xlsx_inline01.xlsx
 excel-reader-xlsx_libre01.xlsx
-formula_stress_test.xlsx.pending
+formula_stress_test.xlsx
 interview.xlsx
 issue.xlsx
 jxls-core_formulaOneRow.xlsx
diff --git a/tests/files b/tests/files
index 6c9129b..448fa13 160000
--- a/tests/files
+++ b/tests/files
@@ -1 +1 @@
-Subproject commit 6c9129b1519cfd593e065ca77aa09f8bc4f676cc
+Subproject commit 448fa13fe614753d1e2f476119201cfca136d2d9
diff --git a/xlsx.js b/xlsx.js
index bd77f1b..fde090a 100644
--- a/xlsx.js
+++ b/xlsx.js
@@ -2,9 +2,9 @@
 /* vim: set ts=2: */
 /*jshint eqnull:true */
 /* Spreadsheet Format -- jump to XLSX for the XLSX code */
-if(typeof module !== "undefined" && typeof require !== 'undefined') SSF = require('ssf');
-var SSF = (function() {
-	var SSF = {};
+/* ssf.js (C) 2013 SheetJS -- http://sheetjs.com */
+var SSF = {};
+var make_ssf = function(SSF){
 String.prototype.reverse=function(){return this.split("").reverse().join("");};
 var _strrev = function(x) { return String(x).reverse(); };
 function fill(c,l) { return new Array(l+1).join(c); }
@@ -26,7 +26,7 @@ var table_fmt = {
 	11: '0.00E+00',
 	12: '# ?/?',
 	13: '# ??/??',
-	14: 'mm/dd/yy',
+  14: 'm/d/yy',
 	15: 'd-mmm-yy',
 	16: 'd-mmm',
 	17: 'mmm-yy',
@@ -68,15 +68,48 @@ var months = [
 	['N', 'Nov', 'November'],
 	['D', 'Dec', 'December']
 ];
+var frac = function(x, D, mixed) {
+  var n1 = Math.floor(x), d1 = 1;
+  var n2 = n1+1, d2 = 1;
+  if(x !== n1) while(d1 <= D && d2 <= D) {
+    var m = (n1 + n2) / (d1 + d2);
+    if(x === m) {
+      if(d1 + d2 <= D) { d1+=d2; n1+=n2; d2=D+1; }
+      else if(d1 > d2) d2=D+1;
+      else d1=D+1;
+      break;
+    }
+    else if(x < m) { n2 = n1+n2; d2 = d1+d2; }
+    else { n1 = n1+n2; d1 = d1+d2; }
+  }
+  if(d1 > D) { d1 = d2; n1 = n2; }
+  if(!mixed) return [0, n1, d1];
+  var q = Math.floor(n1/d1);
+  return [q, n1 - q*d1, d1];
+};
 var general_fmt = function(v) {
 	if(typeof v === 'boolean') return v ? "TRUE" : "FALSE";
+  if(typeof v === 'number') {
+    var o, V = v < 0 ? -v : v;
+    if(V >= 0.1 && V < 1) o = v.toPrecision(9);
+    else if(V >= 0.01 && V < 0.1) o = v.toPrecision(8);
+    else if(V >= 0.001 && V < 0.01) o = v.toPrecision(7);
+    else if(V > Math.pow(10,-9) && V < Math.pow(10,10)) {
+      o = v.toPrecision(10); if(o.length > 11+(v<0?1:0)) o = v.toExponential(5);
+    } 
+    else o = v.toPrecision(6);
+    return o.replace("e","E").replace(/\.0*$/,"").replace(/\.(.*[^0])0*$/,".$1").replace(/(E[+-])([0-9])$/,"$1"+"0"+"$2");
+  }
+  if(typeof v === 'string') return v;
+  throw "unsupported value in General format: " + v;
 };
 SSF._general = general_fmt;
 var parse_date_code = function parse_date_code(v,opts) {
 	var date = Math.floor(v), time = Math.round(86400 * (v - date)), dow=0;
-	var dout=[], out={D:date, T:time}; fixopts(opts = (opts||{}));
+  var dout=[], out={D:date, T:time, u:86400*(v-date)-time}; fixopts(opts = (opts||{}));
 	if(opts.date1904) date += 1462;
 	if(date === 60) {dout = [1900,2,29]; dow=3;}
+  else if(date === 0) {dout = [1900,1,0]; dow=6;}
 	else {
 		if(date > 60) --date;
 		/* 1 = Jan 1 1900 */
@@ -95,6 +128,7 @@ var parse_date_code = function parse_date_code(v,opts) {
 };
 SSF.parse_date_code = parse_date_code;
 var write_date = function(type, fmt, val) {
+  if(val < 0) return "";
 	switch(type) {
 		case 'y': switch(fmt) { /* year */
 			case 'y': case 'yy': return pad(val.y % 100,2);
@@ -133,19 +167,76 @@ var write_date = function(type, fmt, val) {
 		case 's': switch(fmt) { /* seconds */
 			case 's': return val.S;
 			case 'ss': return pad(val.S, 2);
+      case 'ss.0': return pad(val.S,2) + "." + Math.round(10*val.u);
 			default: throw 'bad second format: ' + fmt;
 		} break;
+    case 'Z': switch(fmt) {
+      case '[h]': return val.D*24+val.H;
+      default: throw 'bad abstime format: ' + fmt;
+    } break;
 		/* TODO: handle the ECMA spec format ee -> yy */
 		case 'e': { return val.y; } break;
 		case 'A': return (val.h>=12 ? 'P' : 'A') + fmt.substr(1);
 		default: throw 'bad format type ' + type + ' in ' + fmt;
 	}
 };
+String.prototype.reverse = function() { return this.split("").reverse().join(""); };
+var commaify = function(s) { return s.reverse().replace(/.../g,"$&,").reverse().replace(/^,/,""); };
+var write_num = function(type, fmt, val) {
+  if(type === '(') {
+    var ffmt = fmt.replace(/\( */,"").replace(/ \)/,"").replace(/\)/,"");
+    if(val >= 0) return write_num('n', ffmt, val);
+    return '(' + write_num('n', ffmt, -val) + ')';
+  }
+  var mul = 0, o;
+  fmt = fmt.replace(/%/g,function(x) { mul++; return ""; });
+  if(mul !== 0) return write_num(type, fmt, val * Math.pow(10,2*mul)) + fill("%",mul);
+  if(fmt.indexOf("E") > -1) {
+    var idx = fmt.indexOf("E") - fmt.indexOf(".") - 1;
+    if(fmt == '##0.0E+0') {
+      var ee = Number(val.toExponential(0).substr(3))%3;
+      o = (val/Math.pow(10,ee%3)).toPrecision(idx+1+(ee%3)).replace(/^([+-]?)([0-9]*)\.([0-9]*)[Ee]/,function($$,$1,$2,$3) { return $1 + $2 + $3.substr(0,ee) + "." + $3.substr(ee) + "E"; });
+    } else o = val.toExponential(idx);
+    if(fmt.match(/E\+00$/) && o.match(/e[+-][0-9]$/)) o = o.substr(0,o.length-1) + "0" + o[o.length-1];
+    if(fmt.match(/E\-/) && o.match(/e\+/)) o = o.replace(/e\+/,"e");
+    return o.replace("e","E");
+  }
+  if(fmt[0] === "$") return "$"+write_num(type,fmt.substr(fmt[1]==' '?2:1),val);
+  var r, ff, aval = val < 0 ? -val : val, sign = val < 0 ? "-" : "";
+  switch(fmt) {
+    case "0": return Math.round(val);
+    case "0.0": o = Math.round(val*10);
+      return String(o/10).replace(/^([^\.]+)$/,"$1.0").replace(/\.$/,".0");
+    case "0.00": o = Math.round(val*100);
+      return String(o/100).replace(/^([^\.]+)$/,"$1.00").replace(/\.$/,".00").replace(/\.([0-9])$/,".$1"+"0");
+    case "0.000": o = Math.round(val*1000);
+      return String(o/1000).replace(/^([^\.]+)$/,"$1.000").replace(/\.$/,".000").replace(/\.([0-9])$/,".$1"+"00").replace(/\.([0-9][0-9])$/,".$1"+"0");
+    case "#,##0": return sign + commaify(String(Math.round(aval)));
+    case "#,##0.0": r = Math.round((val-Math.floor(val))*10); return val < 0 ? "-" + write_num(type, fmt, -val) : commaify(String(Math.floor(val))) + "." + r;
+    case "#,##0.00": r = Math.round((val-Math.floor(val))*100); return val < 0 ? "-" + write_num(type, fmt, -val) : commaify(String(Math.floor(val))) + "." + (r < 10 ? "0"+r:r);
+    case "# ? / ?": ff = frac(val<0?-val:val, 10, true); return (val<0?"-":"") + ff[0] + " " + ff[1] + "/" + ff[2];
+    case "# ?? / ??": ff = frac(val<0?-val:val, 100, true); return (val<0?"-":"") + ff[0] + " " + ff[1] + "/" + ff[2];
+    default:
+  }
+  throw new Error("unsupported format |" + fmt + "|");
+};
 function split_fmt(fmt) {
-	return fmt.reverse().split(/;(?!\\)/).reverse().map(_strrev);
+  var out = [];
+  var in_str = -1;
+  for(var i = 0, j = 0; i < fmt.length; ++i) {
+    if(in_str != -1) { if(fmt[i] == '"') in_str = -1; continue; }
+    if(fmt[i] == "_" || fmt[i] == "*" || fmt[i] == "\\") { ++i; continue; }
+    if(fmt[i] == '"') { in_str = i; continue; }
+    if(fmt[i] != ";") continue;
+    out.push(fmt.slice(j,i));
+    j = i+1;
+  }
+  out.push(fmt.slice(j));
+  if(in_str !=-1) throw "Format |" + fmt + "| unterminated string at " + in_str;
+  return out;
 }
 SSF._split = split_fmt;
-function eval_fmt(fmt, v, opts) {
+function eval_fmt(fmt, v, opts, flen) {
 	var out = [], o = "", i = 0, c = "", lst='t', q = {}, dt;
 	fixopts(opts = (opts || {}));
 	var hr='H';
@@ -153,15 +244,19 @@ function eval_fmt(fmt, v, opts) {
 	while(i < fmt.length) {
 		switch((c = fmt[i])) {
 			case '"': /* Literal text */
-				for(o="";fmt[++i] !== '"';) o += fmt[(fmt[i] === '\\' ? ++i : i)];
-				out.push({t:'t', v:o}); break;
-			case '\\': out.push({t:'t', v:fmt[++i]}); ++i; break;
+        for(o="";fmt[++i] !== '"';) o += fmt[i];
+        out.push({t:'t', v:o}); ++i; break;
+      case '\\': var w = fmt[++i], t = "()".indexOf(w) === -1 ? 't' : w;
+        out.push({t:t, v:w}); ++i; break;
+      case '_': out.push({t:'t', v:" "}); i+=2; break;
 			case '@': /* Text Placeholder */
 				out.push({t:'T', v:v}); ++i; break;
 			/* Dates */
 			case 'm': case 'd': case 'y': case 'h': case 's': case 'e':
+        if(v < 0) return "";
 				if(!dt) dt = parse_date_code(v, opts);
 				o = fmt[i]; while(fmt[++i] === c) o+=c;
+        if(c === 's' && fmt[i] === '.' && fmt[i+1] === '0') { o+='.'; while(fmt[++i] === '0') o+= '0'; }
 				if(c === 'm' && lst.toLowerCase() === 'h') c = 'M'; /* m = minute */
 				if(c === 'h') c = hr;
 				q={t:c, v:o}; out.push(q); lst = c; break;
@@ -173,13 +268,27 @@ function eval_fmt(fmt, v, opts) {
 				else q.t = "t";
 				out.push(q); lst = c; break;
 			case '[': /* TODO: Fix this -- ignore all conditionals and formatting */
-				while(fmt[i++] !== ']'); break;
+        o = c;
+        while(fmt[i++] !== ']') o += fmt[i];
+        if(o == "[h]") out.push({t:'Z', v:o});
+        break;
+      /* Numbers */
+      case '0': case '#':
+        var nn = c; while("0#?.,E+-%".indexOf(c=fmt[++i]) > -1) nn += c;
+        out.push({t:'n', v:nn}); break;
+      case '?':
+        o = fmt[i]; while(fmt[++i] === c) o+=c;
+        q={t:c, v:o}; out.push(q); lst = c; break;
+      case '*': ++i; if(fmt[i] == ' ') ++i; break; // **
+      case '(': case ')': out.push({t:(flen===1?'t':c),v:c}); ++i; break;
+      case ' ': out.push({t:c,v:c}); ++i; break;
 			default:
-				if("$-+/():!^&'~{}<>= ".indexOf(c) === -1)
+        if("$-+/():!^&'~{}<>=".indexOf(c) === -1)
 					throw 'unrecognized character ' + fmt[i] + ' in ' + fmt;
 				out.push({t:'t', v:c}); ++i; break;
 		}
 	}
+
 	/* walk backwards */
 	for(i=out.length-1, lst='t'; i >= 0; --i) {
 		switch(out[i].t) {
@@ -192,10 +301,19 @@ function eval_fmt(fmt, v, opts) {
 	/* replace fields */
 	for(i=0; i < out.length; ++i) {
 		switch(out[i].t) {
-			case 't': case 'T': break;
-			case 'd': case 'm': case 'y': case 'h': case 'H': case 'M': case 's': case 'A': case 'e':
+      case 't': case 'T': case ' ': break;
+      case 'd': case 'm': case 'y': case 'h': case 'H': case 'M': case 's': case 'A': case 'e': case 'Z':
 				out[i].v = write_date(out[i].t, out[i].v, dt);
 				out[i].t = 't'; break;
+      case 'n': case '(':
+        var jj = i+1;
+        while(out[jj] && (out[jj].t == '?' || out[jj].t == ' ' || out[i].t == '(' && (out[jj].t == ')' || out[jj].t == 'n') || out[jj].t == 't' && (out[jj].v == '/' || out[jj].v == '$'))) {
+          if(out[jj].v!==' ') out[i].v += ' ' + out[jj].v;
+          delete out[jj]; ++jj;
+        }
+        out[i].v = write_num(out[i].t, out[i].v, v);
+        out[i].t = 't';
+        i = jj; break;
 			default: throw "unrecognized type " + out[i].t;
 		}
 	}
@@ -203,26 +321,34 @@ function eval_fmt(fmt, v, opts) {
 	return out.map(function(x){return x.v;}).join("");
 }
 SSF._eval = eval_fmt;
-function choose_fmt(fmt, v) {
+function choose_fmt(fmt, v, o) {
+  if(typeof fmt === 'number') fmt = table_fmt[fmt];
 	if(typeof fmt === "string") fmt = split_fmt(fmt);
-	if(typeof v !== "number") return fmt[3];
-	return v > 0 ? fmt[0] : v < 0 ? fmt[1] : fmt[2];
+  var l = fmt.length;
+  switch(fmt.length) {
+    case 1: fmt = [fmt[0], fmt[0], fmt[0], "@"]; break;
+    case 2: fmt = [fmt[0], fmt[1], fmt[0], "@"]; break;
+    case 4: break;
+    default: throw "cannot find right format for |" + fmt + "|";
+  }
+  if(typeof v !== "number") return [fmt.length, fmt[3]];
+  return [l, v > 0 ? fmt[0] : v < 0 ? fmt[1] : fmt[2]];
 }
 
 var format = function format(fmt,v,o) {
 	fixopts(o = (o||{}));
 	if(fmt === 0) return general_fmt(v, o);
-	if(typeof fmt === 'number') fmt = table_fmt[fmt];
+  fmt = table_fmt[fmt];
 	var f = choose_fmt(fmt, v, o);
-	return eval_fmt(f, v, o);
+  return eval_fmt(f[1], v, o, f[0]);
 };
 
 SSF._choose = choose_fmt;
 SSF._table = table_fmt;
 SSF.load = function(fmt, idx) { table_fmt[idx] = fmt; };
 SSF.format = format;
-	return SSF;
-})();
+};
+make_ssf(SSF);
 var XLSX = {};
 (function(XLSX){
 function parsexmltag(tag) {