From 436d87c64c3dd1fd14b9e1489154b6f53e890693 Mon Sep 17 00:00:00 2001
From: zcy <290198252@qq.com>
Date: Sun, 11 Feb 2024 13:08:35 +0800
Subject: [PATCH] =?UTF-8?q?=E6=9B=BF=E6=8D=A2=E5=8E=9F=E6=9C=ACole.js?=
 =?UTF-8?q?=E4=B8=BAcfb.js?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 altium_sch.html        |  113 +-
 altium_sch_document.js |   11 +-
 altium_sch_renderer.js |    1 -
 cfb.js                 | 4203 ++++++++++++++++++++++++++++++++++++++++
 ole.js                 |  189 --
 5 files changed, 4318 insertions(+), 199 deletions(-)
 create mode 100644 cfb.js
 delete mode 100644 ole.js
diff --git a/altium_sch.html b/altium_sch.html
index f943ebe..8050b8b 100644
--- a/altium_sch.html
+++ b/altium_sch.html
@@ -7,6 +7,8 @@
 <script type="text/javascript" src="altium_sch_document.js"></script>
 <script type="text/javascript" src="altium_sch_renderer.js"></script>
 <script type="text/javascript" src="test_schdoc.js"></script>
+<script type="text/javascript" src="cfb.js"></script>
+
 </head>
 <body>
 <div><input type="file" id="altium-file"></input></div>
@@ -14,10 +16,11 @@
 <div><pre id="results"></pre></div>
 <script type="text/javascript">
 
-renderSchematic(getTestFile());
+// renderSchematic(getTestFile()); 
 
 function readSchematicFile(e)
 {
+	console.log(e)
 	let file = e.target.files[0];
 	if (!file)
 	{
@@ -27,20 +30,118 @@ function readSchematicFile(e)
 	reader.onload = function(e)
 	{
 		let contents = e.target.result;
-		renderSchematic(contents);
+		let cfbs = window.cfb
+		console.log(contents)
+		var dec = new TextDecoder("utf-8");
+
+		let arr = Array.prototype.slice.call(new Uint8Array(contents ));
+		var ss = cfbs.read(arr,{type: 'binary'});
+		console.log(ss)
+		var schdat = cfbs.find(ss, 'FileHeader');
+		var data = schdat.content;
+		let arrayBuffer = new Uint8Array(data).buffer;
+		console.log(dec.decode(arrayBuffer))
+		renderSchematic(arrayBuffer);
 	};
 	reader.readAsArrayBuffer(file);
 }
 
 document.getElementById('altium-file').addEventListener('change', readSchematicFile, false);
 
+// ArrayBuffer转16进制字符串
+function ab2hex(buffer) {
+const hexArr = Array.prototype.map.call(
+	new Uint8Array(buffer),
+		function (bit) {
+			return (('00' + bit.toString(16)).slice(-2) + " ")
+		}
+	)
+	return hexArr.join('')
+}
+
+function doSave(value, type, name) {
+
+	var blob;
+
+	if (typeof window.Blob == "function") {
+
+		blob = new Blob([value], {
+
+		type: type
+
+		});
+
+	} else {
+
+		var BlobBuilder = window.BlobBuilder || window.MozBlobBuilder || window.WebKitBlobBuilder || window.MSBlobBuilder;
+
+		var bb = new BlobBuilder();
+
+		bb.append(value);
+
+		blob = bb.getBlob(type);
+
+	}
+
+	var URL = window.URL || window.webkitURL;
+
+	var bloburl = URL.createObjectURL(blob);
+
+	var anchor = document.createElement("a");
+
+	if ('download' in anchor) {
+
+		anchor.style.visibility = "hidden";
+
+		anchor.href = bloburl;
+
+		anchor.download = name;
+
+		document.body.appendChild(anchor);
+
+		var evt = document.createEvent("MouseEvents");
+
+		evt.initEvent("click", true, true);
+
+		anchor.dispatchEvent(evt);
+
+		document.body.removeChild(anchor);
+
+	} else if (navigator.msSaveBlob) {
+
+		navigator.msSaveBlob(blob, name);
+
+	} else {
+
+		location.href = bloburl;
+
+	}
+
+}
+
+function arrayToAscii(strArray) {
+    return strArray.flatMap(str => {
+        // 將每個字符串轉換為字符數組
+        return Array.from(str, char => {
+            // 取得字符的Unicode編碼
+            const charCode = char.charCodeAt(0);
+            // 判斷是否為ASCII字符（0-127）
+            if (charCode <= 127) {
+                // 如果是ASCII字符，返回對應的ASCII值
+                return charCode;
+            } else {
+                // 如果不是ASCII字符，返回null或undefined（根據需要處理）
+                return null;
+            }
+        });
+    });
+}
+
 function renderSchematic(data)
 {
 	let canvas = document.getElementById("canvas");
-	let ole = new OLE(data);
-	let fhEntry = ole.directory_entries.find((de) => de.name == "FileHeader");
-	let fhData = fhEntry.read_all();
-	let altiumDocument = new AltiumDocument(fhData);
+	// console.log(new  TextDecoder('utf-8').decod*****************e(fhData))
+	let altiumDocument = new AltiumDocument(data);
 	window.altiumDocument = altiumDocument;
 	let renderer = new AltiumSchematicRenderer(canvas, altiumDocument);
 	renderer.render();
diff --git a/altium_sch_document.js b/altium_sch_document.js
index 7a3d8a0..c25a43e 100644
--- a/altium_sch_document.js
+++ b/altium_sch_document.js
@@ -45,17 +45,21 @@ class AltiumRecord
 	constructor(stream, index)
 	{
 		this.record_index = index;
-		this.stream = stream;
+		this.stream = new U8Stream(stream);
 		this.position = stream.u8stream_position;
 		this.payload_length = stream.read_u16_le();
 		this.padding = stream.read_u8();
 		if (this.padding != 0)
 			console.warn("Padding byte on record index " + index.toString() + " was non-zero.");
 		this.record_type = stream.read_u8();
+		console.warn(this.position)
 		if (this.record_type != 0)
 			throw new Error("Invalid record type.");
 		this.data = stream.read(this.payload_length);
 		this.record_id = -1;
+		console.warn(this.data)
+		console.log(new  TextDecoder('utf-8').decode(this.data))
+
 		if (this.data.length > "|RECORD=255|".length)
 		{
 			// check if this starts with |RECORD=
@@ -679,11 +683,12 @@ class AltiumImplementationParameterList extends AltiumObject
 
 class AltiumDocument
 {
-	constructor(stream)
+	constructor(streams)
 	{
-		this.stream = stream;
+		this.stream = new U8Stream(streams);
 		this.records = [];
 		let index = -1; // header comes first, so give it an index of -1
+		console.log(this.stream.length)
 		while (this.stream.u8stream_position < this.stream.length)
 		{
 			this.records.push(new AltiumRecord(this.stream, index));
diff --git a/altium_sch_renderer.js b/altium_sch_renderer.js
index f7fdc84..c477ff9 100644
--- a/altium_sch_renderer.js
+++ b/altium_sch_renderer.js
@@ -150,7 +150,6 @@ class AltiumSchematicRenderer
 		}
 		results.innerText = bom.join("\n");
 
-
 		for (let obj of doc.objects.filter((o) => o instanceof AltiumWire))
 		{
 			if (!this.#shouldShow(obj)) continue;
diff --git a/cfb.js b/cfb.js
new file mode 100644
index 0000000..335ffc7
--- /dev/null
+++ b/cfb.js
@@ -0,0 +1,4203 @@
+(function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){
+(function (process,Buffer){(function (){
+/* cfb.js (C) 2013-present SheetJS -- http://sheetjs.com */
+/* vim: set ts=2: */
+/*jshint eqnull:true */
+/*exported CFB */
+/*global module, require:false, process:false, Buffer:false, Uint8Array:false, Uint16Array:false */
+
+var Base64_map = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
+function Base64_encode(input) {
+	var o = "";
+	var c1 = 0, c2 = 0, c3 = 0, e1 = 0, e2 = 0, e3 = 0, e4 = 0;
+	for (var i = 0; i < input.length; ) {
+		c1 = input.charCodeAt(i++);
+		e1 = (c1 >> 2);
+		c2 = input.charCodeAt(i++);
+		e2 = ((c1 & 3) << 4) | (c2 >> 4);
+		c3 = input.charCodeAt(i++);
+		e3 = ((c2 & 15) << 2) | (c3 >> 6);
+		e4 = (c3 & 63);
+		if (isNaN(c2)) e3 = e4 = 64;
+		else if (isNaN(c3)) e4 = 64;
+		o += Base64_map.charAt(e1) + Base64_map.charAt(e2) + Base64_map.charAt(e3) + Base64_map.charAt(e4);
+	}
+	return o;
+}
+function Base64_decode(input) {
+	var o = "";
+	var c1 = 0, c2 = 0, c3 = 0, e1 = 0, e2 = 0, e3 = 0, e4 = 0;
+	input = input.replace(/[^\w\+\/\=]/g, "");
+	for (var i = 0; i < input.length;) {
+		e1 = Base64_map.indexOf(input.charAt(i++));
+		e2 = Base64_map.indexOf(input.charAt(i++));
+		c1 = (e1 << 2) | (e2 >> 4);
+		o += String.fromCharCode(c1);
+		e3 = Base64_map.indexOf(input.charAt(i++));
+		c2 = ((e2 & 15) << 4) | (e3 >> 2);
+		if (e3 !== 64) o += String.fromCharCode(c2);
+		e4 = Base64_map.indexOf(input.charAt(i++));
+		c3 = ((e3 & 3) << 6) | e4;
+		if (e4 !== 64) o += String.fromCharCode(c3);
+	}
+	return o;
+}
+var has_buf = (function() { return typeof Buffer !== 'undefined' && typeof process !== 'undefined' && typeof process.versions !== 'undefined' && !!process.versions.node; })();
+
+var Buffer_from = (function() {
+	if(typeof Buffer !== 'undefined') {
+		var nbfs = !Buffer.from;
+		if(!nbfs) try { Buffer.from("foo", "utf8"); } catch(e) { nbfs = true; }
+		return nbfs ? function(buf, enc) { return (enc) ? new Buffer(buf, enc) : new Buffer(buf); } : Buffer.from.bind(Buffer);
+	}
+	return function() {};
+})();
+
+
+function new_raw_buf(len) {
+	/* jshint -W056 */
+	if(has_buf) {
+		if(Buffer.alloc) return Buffer.alloc(len);
+		var b = new Buffer(len); b.fill(0); return b;
+	}
+	return typeof Uint8Array != "undefined" ? new Uint8Array(len) : new Array(len);
+	/* jshint +W056 */
+}
+
+function new_unsafe_buf(len) {
+	/* jshint -W056 */
+	if(has_buf) return Buffer.allocUnsafe ? Buffer.allocUnsafe(len) : new Buffer(len);
+	return typeof Uint8Array != "undefined" ? new Uint8Array(len) : new Array(len);
+	/* jshint +W056 */
+}
+
+var s2a = function s2a(s) {
+	if(has_buf) 
+    return Buffer_from(s, "binary");
+	return s.split("").map(function(x){ return x.charCodeAt(0) & 0xff; });
+};
+
+var chr0 = /\u0000/g, chr1 = /[\u0001-\u0006]/g;
+var __toBuffer = function(bufs) { var x = []; for(var i = 0; i < bufs[0].length; ++i) { x.push.apply(x, bufs[0][i]); } return x; };
+var ___toBuffer = __toBuffer;
+var __utf16le = function(b,s,e) { var ss=[]; for(var i=s; i<e; i+=2) ss.push(String.fromCharCode(__readUInt16LE(b,i))); return ss.join("").replace(chr0,''); };
+var ___utf16le = __utf16le;
+var __hexlify = function(b,s,l) { var ss=[]; for(var i=s; i<s+l; ++i) ss.push(("0" + b[i].toString(16)).slice(-2)); return ss.join(""); };
+var ___hexlify = __hexlify;
+var __bconcat = function(bufs) {
+	if(Array.isArray(bufs[0])) return [].concat.apply([], bufs);
+	var maxlen = 0, i = 0;
+	for(i = 0; i < bufs.length; ++i) maxlen += bufs[i].length;
+	var o = new Uint8Array(maxlen);
+	for(i = 0, maxlen = 0; i < bufs.length; maxlen += bufs[i].length, ++i) o.set(bufs[i], maxlen);
+	return o;
+};
+var bconcat = __bconcat;
+
+
+if(has_buf) {
+	__utf16le = function(b,s,e) {
+		if(!Buffer.isBuffer(b)) return ___utf16le(b,s,e);
+		return b.toString('utf16le',s,e).replace(chr0,'')/*.replace(chr1,'!')*/;
+	};
+	__hexlify = function(b,s,l) { return Buffer.isBuffer(b) ? b.toString('hex',s,s+l) : ___hexlify(b,s,l); };
+	__toBuffer = function(bufs) { return (bufs[0].length > 0 && Buffer.isBuffer(bufs[0][0])) ? Buffer.concat((bufs[0])) : ___toBuffer(bufs);};
+	s2a = function(s) { return Buffer_from(s, "binary"); };
+	bconcat = function(bufs) { return Buffer.isBuffer(bufs[0]) ? Buffer.concat(bufs) : __bconcat(bufs); };
+}
+
+
+var __readUInt8 = function(b, idx) { return b[idx]; };
+var __readUInt16LE = function(b, idx) { return b[idx+1]*(1<<8)+b[idx]; };
+var __readInt16LE = function(b, idx) { var u = b[idx+1]*(1<<8)+b[idx]; return (u < 0x8000) ? u : (0xffff - u + 1) * -1; };
+var __readUInt32LE = function(b, idx) { return b[idx+3]*(1<<24)+(b[idx+2]<<16)+(b[idx+1]<<8)+b[idx]; };
+var __readInt32LE = function(b, idx) { return (b[idx+3]<<24)+(b[idx+2]<<16)+(b[idx+1]<<8)+b[idx]; };
+
+function ReadShift(size, t) {
+	var oI, oS, type = 0;
+	switch(size) {
+		case 1: oI = __readUInt8(this, this.l); break;
+		case 2: oI = (t !== 'i' ? __readUInt16LE : __readInt16LE)(this, this.l); break;
+		case 4: oI = __readInt32LE(this, this.l); break;
+		case 16: type = 2; oS = __hexlify(this, this.l, size);
+	}
+	this.l += size; if(type === 0) return oI; return oS;
+}
+
+var __writeUInt32LE = function(b, val, idx) { b[idx] = (val & 0xFF); b[idx+1] = ((val >>> 8) & 0xFF); b[idx+2] = ((val >>> 16) & 0xFF); b[idx+3] = ((val >>> 24) & 0xFF); };
+var __writeInt32LE  = function(b, val, idx) { b[idx] = (val & 0xFF); b[idx+1] = ((val >> 8) & 0xFF); b[idx+2] = ((val >> 16) & 0xFF); b[idx+3] = ((val >> 24) & 0xFF); };
+
+function WriteShift(t, val, f) {
+	var size = 0, i = 0;
+	switch(f) {
+		case "hex": for(; i < t; ++i) {
+this[this.l++] = parseInt(val.slice(2*i, 2*i+2), 16)||0;
+		} return this;
+		case "utf16le":
+var end = this.l + t;
+			for(i = 0; i < Math.min(val.length, t); ++i) {
+				var cc = val.charCodeAt(i);
+				this[this.l++] = cc & 0xff;
+				this[this.l++] = cc >> 8;
+			}
+			while(this.l < end) this[this.l++] = 0;
+			return this;
+	}
+switch(t) {
+		case  1: size = 1; this[this.l] = val&0xFF; break;
+		case  2: size = 2; this[this.l] = val&0xFF; val >>>= 8; this[this.l+1] = val&0xFF; break;
+		case  4: size = 4; __writeUInt32LE(this, val, this.l); break;
+		case -4: size = 4; __writeInt32LE(this, val, this.l); break;
+	}
+	this.l += size; return this;
+}
+
+function CheckField(hexstr, fld) {
+	var m = __hexlify(this,this.l,hexstr.length>>1);
+	if(m !== hexstr) throw new Error(fld + 'Expected ' + hexstr + ' saw ' + m);
+	this.l += hexstr.length>>1;
+}
+
+function prep_blob(blob, pos) {
+	blob.l = pos;
+	blob.read_shift = ReadShift;
+	blob.chk = CheckField;
+	blob.write_shift = WriteShift;
+}
+
+function new_buf(sz) {
+	var o = (new_raw_buf(sz));
+	prep_blob(o, 0);
+	return o;
+}
+
+/*! crc32.js (C) 2014-present SheetJS -- http://sheetjs.com */
+/* vim: set ts=2: */
+/*exported CRC32 */
+var CRC32 = (function() {
+var CRC32 = {};
+CRC32.version = '1.2.1';
+/*global Int32Array */
+function signed_crc_table() {
+	var c = 0, table = new Array(256);
+
+	for(var n =0; n != 256; ++n){
+		c = n;
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		table[n] = c;
+	}
+
+	return typeof Int32Array !== 'undefined' ? new Int32Array(table) : table;
+}
+
+var T0 = signed_crc_table();
+function slice_by_16_tables(T) {
+	var c = 0, v = 0, n = 0, table = typeof Int32Array !== 'undefined' ? new Int32Array(4096) : new Array(4096) ;
+
+	for(n = 0; n != 256; ++n) table[n] = T[n];
+	for(n = 0; n != 256; ++n) {
+		v = T[n];
+		for(c = 256 + n; c < 4096; c += 256) v = table[c] = (v >>> 8) ^ T[v & 0xFF];
+	}
+	var out = [];
+	for(n = 1; n != 16; ++n) out[n - 1] = typeof Int32Array !== 'undefined' ? table.subarray(n * 256, n * 256 + 256) : table.slice(n * 256, n * 256 + 256);
+	return out;
+}
+var TT = slice_by_16_tables(T0);
+var T1 = TT[0],  T2 = TT[1],  T3 = TT[2],  T4 = TT[3],  T5 = TT[4];
+var T6 = TT[5],  T7 = TT[6],  T8 = TT[7],  T9 = TT[8],  Ta = TT[9];
+var Tb = TT[10], Tc = TT[11], Td = TT[12], Te = TT[13], Tf = TT[14];
+function crc32_bstr(bstr, seed) {
+	var C = seed ^ -1;
+	for(var i = 0, L = bstr.length; i < L;) C = (C>>>8) ^ T0[(C^bstr.charCodeAt(i++))&0xFF];
+	return ~C;
+}
+
+function crc32_buf(B, seed) {
+	var C = seed ^ -1, L = B.length - 15, i = 0;
+	for(; i < L;) C =
+		Tf[B[i++] ^ (C & 255)] ^
+		Te[B[i++] ^ ((C >> 8) & 255)] ^
+		Td[B[i++] ^ ((C >> 16) & 255)] ^
+		Tc[B[i++] ^ (C >>> 24)] ^
+		Tb[B[i++]] ^ Ta[B[i++]] ^ T9[B[i++]] ^ T8[B[i++]] ^
+		T7[B[i++]] ^ T6[B[i++]] ^ T5[B[i++]] ^ T4[B[i++]] ^
+		T3[B[i++]] ^ T2[B[i++]] ^ T1[B[i++]] ^ T0[B[i++]];
+	L += 15;
+	while(i < L) C = (C>>>8) ^ T0[(C^B[i++])&0xFF];
+	return ~C;
+}
+
+function crc32_str(str, seed) {
+	var C = seed ^ -1;
+	for(var i = 0, L = str.length, c = 0, d = 0; i < L;) {
+		c = str.charCodeAt(i++);
+		if(c < 0x80) {
+			C = (C>>>8) ^ T0[(C^c)&0xFF];
+		} else if(c < 0x800) {
+			C = (C>>>8) ^ T0[(C ^ (192|((c>>6)&31)))&0xFF];
+			C = (C>>>8) ^ T0[(C ^ (128|(c&63)))&0xFF];
+		} else if(c >= 0xD800 && c < 0xE000) {
+			c = (c&1023)+64; d = str.charCodeAt(i++)&1023;
+			C = (C>>>8) ^ T0[(C ^ (240|((c>>8)&7)))&0xFF];
+			C = (C>>>8) ^ T0[(C ^ (128|((c>>2)&63)))&0xFF];
+			C = (C>>>8) ^ T0[(C ^ (128|((d>>6)&15)|((c&3)<<4)))&0xFF];
+			C = (C>>>8) ^ T0[(C ^ (128|(d&63)))&0xFF];
+		} else {
+			C = (C>>>8) ^ T0[(C ^ (224|((c>>12)&15)))&0xFF];
+			C = (C>>>8) ^ T0[(C ^ (128|((c>>6)&63)))&0xFF];
+			C = (C>>>8) ^ T0[(C ^ (128|(c&63)))&0xFF];
+		}
+	}
+	return ~C;
+}
+CRC32.table = T0;
+CRC32.bstr = crc32_bstr;
+CRC32.buf = crc32_buf;
+CRC32.str = crc32_str;
+return CRC32;
+})();
+/* [MS-CFB] v20171201 */
+var CFB = (function _CFB(){
+var exports = {};
+exports.version = '1.2.2';
+/* [MS-CFB] 2.6.4 */
+function namecmp(l, r) {
+	var L = l.split("/"), R = r.split("/");
+	for(var i = 0, c = 0, Z = Math.min(L.length, R.length); i < Z; ++i) {
+		if((c = L[i].length - R[i].length)) return c;
+		if(L[i] != R[i]) return L[i] < R[i] ? -1 : 1;
+	}
+	return L.length - R.length;
+}
+function dirname(p) {
+	if(p.charAt(p.length - 1) == "/") return (p.slice(0,-1).indexOf("/") === -1) ? p : dirname(p.slice(0, -1));
+	var c = p.lastIndexOf("/");
+	return (c === -1) ? p : p.slice(0, c+1);
+}
+
+function filename(p) {
+	if(p.charAt(p.length - 1) == "/") return filename(p.slice(0, -1));
+	var c = p.lastIndexOf("/");
+	return (c === -1) ? p : p.slice(c+1);
+}
+/* -------------------------------------------------------------------------- */
+/* DOS Date format:
+   high|YYYYYYYm.mmmddddd.HHHHHMMM.MMMSSSSS|low
+   add 1980 to stored year
+   stored second should be doubled
+*/
+
+/* write JS date to buf as a DOS date */
+function write_dos_date(buf, date) {
+	if(typeof date === "string") date = new Date(date);
+	var hms = date.getHours();
+	hms = hms << 6 | date.getMinutes();
+	hms = hms << 5 | (date.getSeconds()>>>1);
+	buf.write_shift(2, hms);
+	var ymd = (date.getFullYear() - 1980);
+	ymd = ymd << 4 | (date.getMonth()+1);
+	ymd = ymd << 5 | date.getDate();
+	buf.write_shift(2, ymd);
+}
+
+/* read four bytes from buf and interpret as a DOS date */
+function parse_dos_date(buf) {
+	var hms = buf.read_shift(2) & 0xFFFF;
+	var ymd = buf.read_shift(2) & 0xFFFF;
+	var val = new Date();
+	var d = ymd & 0x1F; ymd >>>= 5;
+	var m = ymd & 0x0F; ymd >>>= 4;
+	val.setMilliseconds(0);
+	val.setFullYear(ymd + 1980);
+	val.setMonth(m-1);
+	val.setDate(d);
+	var S = hms & 0x1F; hms >>>= 5;
+	var M = hms & 0x3F; hms >>>= 6;
+	val.setHours(hms);
+	val.setMinutes(M);
+	val.setSeconds(S<<1);
+	return val;
+}
+function parse_extra_field(blob) {
+	prep_blob(blob, 0);
+	var o = {};
+	var flags = 0;
+	while(blob.l <= blob.length - 4) {
+		var type = blob.read_shift(2);
+		var sz = blob.read_shift(2), tgt = blob.l + sz;
+		var p = {};
+		switch(type) {
+			/* UNIX-style Timestamps */
+			case 0x5455: {
+				flags = blob.read_shift(1);
+				if(flags & 1) p.mtime = blob.read_shift(4);
+				/* for some reason, CD flag corresponds to LFH */
+				if(sz > 5) {
+					if(flags & 2) p.atime = blob.read_shift(4);
+					if(flags & 4) p.ctime = blob.read_shift(4);
+				}
+				if(p.mtime) p.mt = new Date(p.mtime*1000);
+			}
+			break;
+		}
+		blob.l = tgt;
+		o[type] = p;
+	}
+	return o;
+}
+var fs;
+function get_fs() { return fs || (fs = require('fs')); }
+function parse(file, options) {
+if(file[0] == 0x50 && file[1] == 0x4b) return parse_zip(file, options);
+if((file[0] | 0x20) == 0x6d && (file[1]|0x20) == 0x69) return parse_mad(file, options);
+if(file.length < 512) throw new Error("CFB file size " + file.length + " < 512");
+var mver = 3;
+var ssz = 512;
+var nmfs = 0; // number of mini FAT sectors
+var difat_sec_cnt = 0;
+var dir_start = 0;
+var minifat_start = 0;
+var difat_start = 0;
+
+var fat_addrs = []; // locations of FAT sectors
+
+/* [MS-CFB] 2.2 Compound File Header */
+var blob = file.slice(0,512);
+prep_blob(blob, 0);
+
+/* major version */
+var mv = check_get_mver(blob);
+mver = mv[0];
+switch(mver) {
+	case 3: ssz = 512; break; case 4: ssz = 4096; break;
+	case 0: if(mv[1] == 0) return parse_zip(file, options);
+	/* falls through */
+	default: throw new Error("Major Version: Expected 3 or 4 saw " + mver);
+}
+
+/* reprocess header */
+if(ssz !== 512) { blob = file.slice(0,ssz); prep_blob(blob, 28 /* blob.l */); }
+/* Save header for final object */
+var header = file.slice(0,ssz);
+
+check_shifts(blob, mver);
+
+// Number of Directory Sectors
+var dir_cnt = blob.read_shift(4, 'i');
+if(mver === 3 && dir_cnt !== 0) throw new Error('# Directory Sectors: Expected 0 saw ' + dir_cnt);
+
+// Number of FAT Sectors
+blob.l += 4;
+
+// First Directory Sector Location
+dir_start = blob.read_shift(4, 'i');
+
+// Transaction Signature
+blob.l += 4;
+
+// Mini Stream Cutoff Size
+blob.chk('00100000', 'Mini Stream Cutoff Size: ');
+
+// First Mini FAT Sector Location
+minifat_start = blob.read_shift(4, 'i');
+
+// Number of Mini FAT Sectors
+nmfs = blob.read_shift(4, 'i');
+
+// First DIFAT sector location
+difat_start = blob.read_shift(4, 'i');
+
+// Number of DIFAT Sectors
+difat_sec_cnt = blob.read_shift(4, 'i');
+
+// Grab FAT Sector Locations
+for(var q = -1, j = 0; j < 109; ++j) { /* 109 = (512 - blob.l)>>>2; */
+	q = blob.read_shift(4, 'i');
+	if(q<0) break;
+	fat_addrs[j] = q;
+}
+
+/** Break the file up into sectors */
+var sectors = sectorify(file, ssz);
+
+sleuth_fat(difat_start, difat_sec_cnt, sectors, ssz, fat_addrs);
+
+/** Chains */
+var sector_list = make_sector_list(sectors, dir_start, fat_addrs, ssz);
+
+sector_list[dir_start].name = "!Directory";
+if(nmfs > 0 && minifat_start !== ENDOFCHAIN) sector_list[minifat_start].name = "!MiniFAT";
+sector_list[fat_addrs[0]].name = "!FAT";
+sector_list.fat_addrs = fat_addrs;
+sector_list.ssz = ssz;
+
+/* [MS-CFB] 2.6.1 Compound File Directory Entry */
+var files = {}, Paths = [], FileIndex = [], FullPaths = [];
+read_directory(dir_start, sector_list, sectors, Paths, nmfs, files, FileIndex, minifat_start);
+
+build_full_paths(FileIndex, FullPaths, Paths);
+Paths.shift();
+
+var o = {
+	FileIndex: FileIndex,
+	FullPaths: FullPaths
+};
+
+// $FlowIgnore
+if(options && options.raw) o.raw = {header: header, sectors: sectors};
+return o;
+} // parse
+
+/* [MS-CFB] 2.2 Compound File Header -- read up to major version */
+function check_get_mver(blob) {
+	if(blob[blob.l] == 0x50 && blob[blob.l + 1] == 0x4b) return [0, 0];
+	// header signature 8
+	blob.chk(HEADER_SIGNATURE, 'Header Signature: ');
+
+	// clsid 16
+	//blob.chk(HEADER_CLSID, 'CLSID: ');
+	blob.l += 16;
+
+	// minor version 2
+	var mver = blob.read_shift(2, 'u');
+
+	return [blob.read_shift(2,'u'), mver];
+}
+function check_shifts(blob, mver) {
+	var shift = 0x09;
+
+	// Byte Order
+	//blob.chk('feff', 'Byte Order: '); // note: some writers put 0xffff
+	blob.l += 2;
+
+	// Sector Shift
+	switch((shift = blob.read_shift(2))) {
+		case 0x09: if(mver != 3) throw new Error('Sector Shift: Expected 9 saw ' + shift); break;
+		case 0x0c: if(mver != 4) throw new Error('Sector Shift: Expected 12 saw ' + shift); break;
+		default: throw new Error('Sector Shift: Expected 9 or 12 saw ' + shift);
+	}
+
+	// Mini Sector Shift
+	blob.chk('0600', 'Mini Sector Shift: ');
+
+	// Reserved
+	blob.chk('000000000000', 'Reserved: ');
+}
+
+/** Break the file up into sectors */
+function sectorify(file, ssz) {
+	var nsectors = Math.ceil(file.length/ssz)-1;
+	var sectors = [];
+	for(var i=1; i < nsectors; ++i) sectors[i-1] = file.slice(i*ssz,(i+1)*ssz);
+	sectors[nsectors-1] = file.slice(nsectors*ssz);
+	return sectors;
+}
+
+/* [MS-CFB] 2.6.4 Red-Black Tree */
+function build_full_paths(FI, FP, Paths) {
+	var i = 0, L = 0, R = 0, C = 0, j = 0, pl = Paths.length;
+	var dad = [], q = [];
+
+	for(; i < pl; ++i) { dad[i]=q[i]=i; FP[i]=Paths[i]; }
+
+	for(; j < q.length; ++j) {
+		i = q[j];
+		L = FI[i].L; R = FI[i].R; C = FI[i].C;
+		if(dad[i] === i) {
+			if(L !== -1 /*NOSTREAM*/ && dad[L] !== L) dad[i] = dad[L];
+			if(R !== -1 && dad[R] !== R) dad[i] = dad[R];
+		}
+		if(C !== -1 /*NOSTREAM*/) dad[C] = i;
+		if(L !== -1 && i != dad[i]) { dad[L] = dad[i]; if(q.lastIndexOf(L) < j) q.push(L); }
+		if(R !== -1 && i != dad[i]) { dad[R] = dad[i]; if(q.lastIndexOf(R) < j) q.push(R); }
+	}
+	for(i=1; i < pl; ++i) if(dad[i] === i) {
+		if(R !== -1 /*NOSTREAM*/ && dad[R] !== R) dad[i] = dad[R];
+		else if(L !== -1 && dad[L] !== L) dad[i] = dad[L];
+	}
+
+	for(i=1; i < pl; ++i) {
+		if(FI[i].type === 0 /* unknown */) continue;
+		j = i;
+		if(j != dad[j]) do {
+			j = dad[j];
+			FP[i] = FP[j] + "/" + FP[i];
+		} while (j !== 0 && -1 !== dad[j] && j != dad[j]);
+		dad[i] = -1;
+	}
+
+	FP[0] += "/";
+	for(i=1; i < pl; ++i) {
+		if(FI[i].type !== 2 /* stream */) FP[i] += "/";
+	}
+}
+
+function get_mfat_entry(entry, payload, mini) {
+	var start = entry.start, size = entry.size;
+	//return (payload.slice(start*MSSZ, start*MSSZ + size));
+	var o = [];
+	var idx = start;
+	while(mini && size > 0 && idx >= 0) {
+		o.push(payload.slice(idx * MSSZ, idx * MSSZ + MSSZ));
+		size -= MSSZ;
+		idx = __readInt32LE(mini, idx * 4);
+	}
+	if(o.length === 0) return (new_buf(0));
+	return (bconcat(o).slice(0, entry.size));
+}
+
+/** Chase down the rest of the DIFAT chain to build a comprehensive list
+    DIFAT chains by storing the next sector number as the last 32 bits */
+function sleuth_fat(idx, cnt, sectors, ssz, fat_addrs) {
+	var q = ENDOFCHAIN;
+	if(idx === ENDOFCHAIN) {
+		if(cnt !== 0) throw new Error("DIFAT chain shorter than expected");
+	} else if(idx !== -1 /*FREESECT*/) {
+		var sector = sectors[idx], m = (ssz>>>2)-1;
+		if(!sector) return;
+		for(var i = 0; i < m; ++i) {
+			if((q = __readInt32LE(sector,i*4)) === ENDOFCHAIN) break;
+			fat_addrs.push(q);
+		}
+		if(cnt >= 1) sleuth_fat(__readInt32LE(sector,ssz-4),cnt - 1, sectors, ssz, fat_addrs);
+	}
+}
+
+/** Follow the linked list of sectors for a given starting point */
+function get_sector_list(sectors, start, fat_addrs, ssz, chkd) {
+	var buf = [], buf_chain = [];
+	if(!chkd) chkd = [];
+	var modulus = ssz - 1, j = 0, jj = 0;
+	for(j=start; j>=0;) {
+		chkd[j] = true;
+		buf[buf.length] = j;
+		buf_chain.push(sectors[j]);
+		var addr = fat_addrs[Math.floor(j*4/ssz)];
+		jj = ((j*4) & modulus);
+		if(ssz < 4 + jj) throw new Error("FAT boundary crossed: " + j + " 4 "+ssz);
+		if(!sectors[addr]) break;
+		j = __readInt32LE(sectors[addr], jj);
+	}
+	return {nodes: buf, data:__toBuffer([buf_chain])};
+}
+
+/** Chase down the sector linked lists */
+function make_sector_list(sectors, dir_start, fat_addrs, ssz) {
+	var sl = sectors.length, sector_list = ([]);
+	var chkd = [], buf = [], buf_chain = [];
+	var modulus = ssz - 1, i=0, j=0, k=0, jj=0;
+	for(i=0; i < sl; ++i) {
+		buf = ([]);
+		k = (i + dir_start); if(k >= sl) k-=sl;
+		if(chkd[k]) continue;
+		buf_chain = [];
+		var seen = [];
+		for(j=k; j>=0;) {
+			seen[j] = true;
+			chkd[j] = true;
+			buf[buf.length] = j;
+			buf_chain.push(sectors[j]);
+			var addr = fat_addrs[Math.floor(j*4/ssz)];
+			jj = ((j*4) & modulus);
+			if(ssz < 4 + jj) throw new Error("FAT boundary crossed: " + j + " 4 "+ssz);
+			if(!sectors[addr]) break;
+			j = __readInt32LE(sectors[addr], jj);
+			if(seen[j]) break;
+		}
+		sector_list[k] = ({nodes: buf, data:__toBuffer([buf_chain])});
+	}
+	return sector_list;
+}
+
+/* [MS-CFB] 2.6.1 Compound File Directory Entry */
+function read_directory(dir_start, sector_list, sectors, Paths, nmfs, files, FileIndex, mini) {
+	var minifat_store = 0, pl = (Paths.length?2:0);
+	var sector = sector_list[dir_start].data;
+	var i = 0, namelen = 0, name;
+	for(; i < sector.length; i+= 128) {
+		var blob = sector.slice(i, i+128);
+		prep_blob(blob, 64);
+		namelen = blob.read_shift(2);
+		name = __utf16le(blob,0,namelen-pl);
+		Paths.push(name);
+		var o = ({
+			name:  name,
+			type:  blob.read_shift(1),
+			color: blob.read_shift(1),
+			L:     blob.read_shift(4, 'i'),
+			R:     blob.read_shift(4, 'i'),
+			C:     blob.read_shift(4, 'i'),
+			clsid: blob.read_shift(16),
+			state: blob.read_shift(4, 'i'),
+			start: 0,
+			size: 0
+		});
+		var ctime = blob.read_shift(2) + blob.read_shift(2) + blob.read_shift(2) + blob.read_shift(2);
+		if(ctime !== 0) o.ct = read_date(blob, blob.l-8);
+		var mtime = blob.read_shift(2) + blob.read_shift(2) + blob.read_shift(2) + blob.read_shift(2);
+		if(mtime !== 0) o.mt = read_date(blob, blob.l-8);
+		o.start = blob.read_shift(4, 'i');
+		o.size = blob.read_shift(4, 'i');
+		if(o.size < 0 && o.start < 0) { o.size = o.type = 0; o.start = ENDOFCHAIN; o.name = ""; }
+		if(o.type === 5) { /* root */
+			minifat_store = o.start;
+			if(nmfs > 0 && minifat_store !== ENDOFCHAIN) sector_list[minifat_store].name = "!StreamData";
+			/*minifat_size = o.size;*/
+		} else if(o.size >= 4096 /* MSCSZ */) {
+			o.storage = 'fat';
+			if(sector_list[o.start] === undefined) sector_list[o.start] = get_sector_list(sectors, o.start, sector_list.fat_addrs, sector_list.ssz);
+			sector_list[o.start].name = o.name;
+			o.content = (sector_list[o.start].data.slice(0,o.size));
+		} else {
+			o.storage = 'minifat';
+			if(o.size < 0) o.size = 0;
+			else if(minifat_store !== ENDOFCHAIN && o.start !== ENDOFCHAIN && sector_list[minifat_store]) {
+				o.content = get_mfat_entry(o, sector_list[minifat_store].data, (sector_list[mini]||{}).data);
+			}
+		}
+		if(o.content) prep_blob(o.content, 0);
+		files[name] = o;
+		FileIndex.push(o);
+	}
+}
+
+function read_date(blob, offset) {
+	return new Date(( ( (__readUInt32LE(blob,offset+4)/1e7)*Math.pow(2,32)+__readUInt32LE(blob,offset)/1e7 ) - 11644473600)*1000);
+}
+
+function read_file(filename, options) {
+	get_fs();
+	return parse(fs.readFileSync(filename), options);
+}
+
+function read(blob, options) {
+	var type = options && options.type;
+	if(!type) {
+		if(has_buf && Buffer.isBuffer(blob)) type = "buffer";
+	}
+	switch(type || "base64") {
+		case "file": return read_file(blob, options);
+		case "base64": return parse(s2a(Base64_decode(blob)), options);
+		case "binary": return parse(blob, options);
+	}
+	return parse(blob, options);
+}
+
+function init_cfb(cfb, opts) {
+	var o = opts || {}, root = o.root || "Root Entry";
+	if(!cfb.FullPaths) cfb.FullPaths = [];
+	if(!cfb.FileIndex) cfb.FileIndex = [];
+	if(cfb.FullPaths.length !== cfb.FileIndex.length) throw new Error("inconsistent CFB structure");
+	if(cfb.FullPaths.length === 0) {
+		cfb.FullPaths[0] = root + "/";
+		cfb.FileIndex[0] = ({ name: root, type: 5 });
+	}
+	if(o.CLSID) cfb.FileIndex[0].clsid = o.CLSID;
+	seed_cfb(cfb);
+}
+function seed_cfb(cfb) {
+	var nm = "\u0001Sh33tJ5";
+	if(CFB.find(cfb, "/" + nm)) return;
+	var p = new_buf(4); p[0] = 55; p[1] = p[3] = 50; p[2] = 54;
+	cfb.FileIndex.push(({ name: nm, type: 2, content:p, size:4, L:69, R:69, C:69 }));
+	cfb.FullPaths.push(cfb.FullPaths[0] + nm);
+	rebuild_cfb(cfb);
+}
+function rebuild_cfb(cfb, f) {
+	init_cfb(cfb);
+	var gc = false, s = false;
+	for(var i = cfb.FullPaths.length - 1; i >= 0; --i) {
+		var _file = cfb.FileIndex[i];
+		switch(_file.type) {
+			case 0:
+				if(s) gc = true;
+				else { cfb.FileIndex.pop(); cfb.FullPaths.pop(); }
+				break;
+			case 1: case 2: case 5:
+				s = true;
+				if(isNaN(_file.R * _file.L * _file.C)) gc = true;
+				if(_file.R > -1 && _file.L > -1 && _file.R == _file.L) gc = true;
+				break;
+			default: gc = true; break;
+		}
+	}
+	if(!gc && !f) return;
+
+	var now = new Date(1987, 1, 19), j = 0;
+	// Track which names exist
+	var fullPaths = Object.create ? Object.create(null) : {};
+	var data = [];
+	for(i = 0; i < cfb.FullPaths.length; ++i) {
+		fullPaths[cfb.FullPaths[i]] = true;
+		if(cfb.FileIndex[i].type === 0) continue;
+		data.push([cfb.FullPaths[i], cfb.FileIndex[i]]);
+	}
+	for(i = 0; i < data.length; ++i) {
+		var dad = dirname(data[i][0]);
+		s = fullPaths[dad];
+		while(!s) {
+			while(dirname(dad) && !fullPaths[dirname(dad)]) dad = dirname(dad);
+
+			data.push([dad, ({
+				name: filename(dad).replace("/",""),
+				type: 1,
+				clsid: HEADER_CLSID,
+				ct: now, mt: now,
+				content: null
+			})]);
+
+			// Add name to set
+			fullPaths[dad] = true;
+
+			dad = dirname(data[i][0]);
+			s = fullPaths[dad];
+		}
+	}
+
+	data.sort(function(x,y) { return namecmp(x[0], y[0]); });
+	cfb.FullPaths = []; cfb.FileIndex = [];
+	for(i = 0; i < data.length; ++i) { cfb.FullPaths[i] = data[i][0]; cfb.FileIndex[i] = data[i][1]; }
+	for(i = 0; i < data.length; ++i) {
+		var elt = cfb.FileIndex[i];
+		var nm = cfb.FullPaths[i];
+
+		elt.name =  filename(nm).replace("/","");
+		elt.L = elt.R = elt.C = -(elt.color = 1);
+		elt.size = elt.content ? elt.content.length : 0;
+		elt.start = 0;
+		elt.clsid = (elt.clsid || HEADER_CLSID);
+		if(i === 0) {
+			elt.C = data.length > 1 ? 1 : -1;
+			elt.size = 0;
+			elt.type = 5;
+		} else if(nm.slice(-1) == "/") {
+			for(j=i+1;j < data.length; ++j) if(dirname(cfb.FullPaths[j])==nm) break;
+			elt.C = j >= data.length ? -1 : j;
+			for(j=i+1;j < data.length; ++j) if(dirname(cfb.FullPaths[j])==dirname(nm)) break;
+			elt.R = j >= data.length ? -1 : j;
+			elt.type = 1;
+		} else {
+			if(dirname(cfb.FullPaths[i+1]||"") == dirname(nm)) elt.R = i + 1;
+			elt.type = 2;
+		}
+	}
+
+}
+
+function _write(cfb, options) {
+	var _opts = options || {};
+	/* MAD is order-sensitive, skip rebuild and sort */
+	if(_opts.fileType == 'mad') return write_mad(cfb, _opts);
+	rebuild_cfb(cfb);
+	switch(_opts.fileType) {
+		case 'zip': return write_zip(cfb, _opts);
+		//case 'mad': return write_mad(cfb, _opts);
+	}
+	var L = (function(cfb){
+		var mini_size = 0, fat_size = 0;
+		for(var i = 0; i < cfb.FileIndex.length; ++i) {
+			var file = cfb.FileIndex[i];
+			if(!file.content) continue;
+			var flen = file.content.length;
+			if(flen > 0){
+				if(flen < 0x1000) mini_size += (flen + 0x3F) >> 6;
+				else fat_size += (flen + 0x01FF) >> 9;
+			}
+		}
+		var dir_cnt = (cfb.FullPaths.length +3) >> 2;
+		var mini_cnt = (mini_size + 7) >> 3;
+		var mfat_cnt = (mini_size + 0x7F) >> 7;
+		var fat_base = mini_cnt + fat_size + dir_cnt + mfat_cnt;
+		var fat_cnt = (fat_base + 0x7F) >> 7;
+		var difat_cnt = fat_cnt <= 109 ? 0 : Math.ceil((fat_cnt-109)/0x7F);
+		while(((fat_base + fat_cnt + difat_cnt + 0x7F) >> 7) > fat_cnt) difat_cnt = ++fat_cnt <= 109 ? 0 : Math.ceil((fat_cnt-109)/0x7F);
+		var L =  [1, difat_cnt, fat_cnt, mfat_cnt, dir_cnt, fat_size, mini_size, 0];
+		cfb.FileIndex[0].size = mini_size << 6;
+		L[7] = (cfb.FileIndex[0].start=L[0]+L[1]+L[2]+L[3]+L[4]+L[5])+((L[6]+7) >> 3);
+		return L;
+	})(cfb);
+	var o = new_buf(L[7] << 9);
+	var i = 0, T = 0;
+	{
+		for(i = 0; i < 8; ++i) o.write_shift(1, HEADER_SIG[i]);
+		for(i = 0; i < 8; ++i) o.write_shift(2, 0);
+		o.write_shift(2, 0x003E);
+		o.write_shift(2, 0x0003);
+		o.write_shift(2, 0xFFFE);
+		o.write_shift(2, 0x0009);
+		o.write_shift(2, 0x0006);
+		for(i = 0; i < 3; ++i) o.write_shift(2, 0);
+		o.write_shift(4, 0);
+		o.write_shift(4, L[2]);
+		o.write_shift(4, L[0] + L[1] + L[2] + L[3] - 1);
+		o.write_shift(4, 0);
+		o.write_shift(4, 1<<12);
+		o.write_shift(4, L[3] ? L[0] + L[1] + L[2] - 1: ENDOFCHAIN);
+		o.write_shift(4, L[3]);
+		o.write_shift(-4, L[1] ? L[0] - 1: ENDOFCHAIN);
+		o.write_shift(4, L[1]);
+		for(i = 0; i < 109; ++i) o.write_shift(-4, i < L[2] ? L[1] + i : -1);
+	}
+	if(L[1]) {
+		for(T = 0; T < L[1]; ++T) {
+			for(; i < 236 + T * 127; ++i) o.write_shift(-4, i < L[2] ? L[1] + i : -1);
+			o.write_shift(-4, T === L[1] - 1 ? ENDOFCHAIN : T + 1);
+		}
+	}
+	var chainit = function(w) {
+		for(T += w; i<T-1; ++i) o.write_shift(-4, i+1);
+		if(w) { ++i; o.write_shift(-4, ENDOFCHAIN); }
+	};
+	T = i = 0;
+	for(T+=L[1]; i<T; ++i) o.write_shift(-4, consts.DIFSECT);
+	for(T+=L[2]; i<T; ++i) o.write_shift(-4, consts.FATSECT);
+	chainit(L[3]);
+	chainit(L[4]);
+	var j = 0, flen = 0;
+	var file = cfb.FileIndex[0];
+	for(; j < cfb.FileIndex.length; ++j) {
+		file = cfb.FileIndex[j];
+		if(!file.content) continue;
+flen = file.content.length;
+		if(flen < 0x1000) continue;
+		file.start = T;
+		chainit((flen + 0x01FF) >> 9);
+	}
+	chainit((L[6] + 7) >> 3);
+	while(o.l & 0x1FF) o.write_shift(-4, consts.ENDOFCHAIN);
+	T = i = 0;
+	for(j = 0; j < cfb.FileIndex.length; ++j) {
+		file = cfb.FileIndex[j];
+		if(!file.content) continue;
+flen = file.content.length;
+		if(!flen || flen >= 0x1000) continue;
+		file.start = T;
+		chainit((flen + 0x3F) >> 6);
+	}
+	while(o.l & 0x1FF) o.write_shift(-4, consts.ENDOFCHAIN);
+	for(i = 0; i < L[4]<<2; ++i) {
+		var nm = cfb.FullPaths[i];
+		if(!nm || nm.length === 0) {
+			for(j = 0; j < 17; ++j) o.write_shift(4, 0);
+			for(j = 0; j < 3; ++j) o.write_shift(4, -1);
+			for(j = 0; j < 12; ++j) o.write_shift(4, 0);
+			continue;
+		}
+		file = cfb.FileIndex[i];
+		if(i === 0) file.start = file.size ? file.start - 1 : ENDOFCHAIN;
+		var _nm = (i === 0 && _opts.root) || file.name;
+		if(_nm.length > 32) {
+			console.error("Name " + _nm + " will be truncated to " + _nm.slice(0,32));
+			_nm = _nm.slice(0, 32);
+		}
+		flen = 2*(_nm.length+1);
+		o.write_shift(64, _nm, "utf16le");
+		o.write_shift(2, flen);
+		o.write_shift(1, file.type);
+		o.write_shift(1, file.color);
+		o.write_shift(-4, file.L);
+		o.write_shift(-4, file.R);
+		o.write_shift(-4, file.C);
+		if(!file.clsid) for(j = 0; j < 4; ++j) o.write_shift(4, 0);
+		else o.write_shift(16, file.clsid, "hex");
+		o.write_shift(4, file.state || 0);
+		o.write_shift(4, 0); o.write_shift(4, 0);
+		o.write_shift(4, 0); o.write_shift(4, 0);
+		o.write_shift(4, file.start);
+		o.write_shift(4, file.size); o.write_shift(4, 0);
+	}
+	for(i = 1; i < cfb.FileIndex.length; ++i) {
+		file = cfb.FileIndex[i];
+if(file.size >= 0x1000) {
+			o.l = (file.start+1) << 9;
+			if (has_buf && Buffer.isBuffer(file.content)) {
+				file.content.copy(o, o.l, 0, file.size);
+				// o is a 0-filled Buffer so just set next offset
+				o.l += (file.size + 511) & -512;
+			} else {
+				for(j = 0; j < file.size; ++j) o.write_shift(1, file.content[j]);
+				for(; j & 0x1FF; ++j) o.write_shift(1, 0);
+			}
+		}
+	}
+	for(i = 1; i < cfb.FileIndex.length; ++i) {
+		file = cfb.FileIndex[i];
+if(file.size > 0 && file.size < 0x1000) {
+			if (has_buf && Buffer.isBuffer(file.content)) {
+				file.content.copy(o, o.l, 0, file.size);
+				// o is a 0-filled Buffer so just set next offset
+				o.l += (file.size + 63) & -64;
+			} else {
+				for(j = 0; j < file.size; ++j) o.write_shift(1, file.content[j]);
+				for(; j & 0x3F; ++j) o.write_shift(1, 0);
+			}
+		}
+	}
+	if (has_buf) {
+		o.l = o.length;
+	} else {
+		// When using Buffer, already 0-filled
+		while(o.l < o.length) o.write_shift(1, 0);
+	}
+	return o;
+}
+/* [MS-CFB] 2.6.4 (Unicode 3.0.1 case conversion) */
+function find(cfb, path) {
+	var UCFullPaths = cfb.FullPaths.map(function(x) { return x.toUpperCase(); });
+	var UCPaths = UCFullPaths.map(function(x) { var y = x.split("/"); return y[y.length - (x.slice(-1) == "/" ? 2 : 1)]; });
+	var k = false;
+	if(path.charCodeAt(0) === 47 /* "/" */) { k = true; path = UCFullPaths[0].slice(0, -1) + path; }
+	else k = path.indexOf("/") !== -1;
+	var UCPath = path.toUpperCase();
+	var w = k === true ? UCFullPaths.indexOf(UCPath) : UCPaths.indexOf(UCPath);
+	if(w !== -1) return cfb.FileIndex[w];
+
+	var m = !UCPath.match(chr1);
+	UCPath = UCPath.replace(chr0,'');
+	if(m) UCPath = UCPath.replace(chr1,'!');
+	for(w = 0; w < UCFullPaths.length; ++w) {
+		if((m ? UCFullPaths[w].replace(chr1,'!') : UCFullPaths[w]).replace(chr0,'') == UCPath) return cfb.FileIndex[w];
+		if((m ? UCPaths[w].replace(chr1,'!') : UCPaths[w]).replace(chr0,'') == UCPath) return cfb.FileIndex[w];
+	}
+	return null;
+}
+/** CFB Constants */
+var MSSZ = 64; /* Mini Sector Size = 1<<6 */
+//var MSCSZ = 4096; /* Mini Stream Cutoff Size */
+/* 2.1 Compound File Sector Numbers and Types */
+var ENDOFCHAIN = -2;
+/* 2.2 Compound File Header */
+var HEADER_SIGNATURE = 'd0cf11e0a1b11ae1';
+var HEADER_SIG = [0xD0, 0xCF, 0x11, 0xE0, 0xA1, 0xB1, 0x1A, 0xE1];
+var HEADER_CLSID = '00000000000000000000000000000000';
+var consts = {
+	/* 2.1 Compund File Sector Numbers and Types */
+	MAXREGSECT: -6,
+	DIFSECT: -4,
+	FATSECT: -3,
+	ENDOFCHAIN: ENDOFCHAIN,
+	FREESECT: -1,
+	/* 2.2 Compound File Header */
+	HEADER_SIGNATURE: HEADER_SIGNATURE,
+	HEADER_MINOR_VERSION: '3e00',
+	MAXREGSID: -6,
+	NOSTREAM: -1,
+	HEADER_CLSID: HEADER_CLSID,
+	/* 2.6.1 Compound File Directory Entry */
+	EntryTypes: ['unknown','storage','stream','lockbytes','property','root']
+};
+
+function write_file(cfb, filename, options) {
+	get_fs();
+	var o = _write(cfb, options);
+fs.writeFileSync(filename, o);
+}
+
+function a2s(o) {
+	var out = new Array(o.length);
+	for(var i = 0; i < o.length; ++i) out[i] = String.fromCharCode(o[i]);
+	return out.join("");
+}
+
+function write(cfb, options) {
+	var o = _write(cfb, options);
+	switch(options && options.type || "buffer") {
+		case "file": get_fs(); fs.writeFileSync(options.filename, (o)); return o;
+		case "binary": return typeof o == "string" ? o : a2s(o);
+		case "base64": return Base64_encode(typeof o == "string" ? o : a2s(o));
+		case "buffer": if(has_buf) return Buffer.isBuffer(o) ? o : Buffer_from(o);
+			/* falls through */
+		case "array": return typeof o == "string" ? s2a(o) : o;
+	}
+	return o;
+}
+/* node < 8.1 zlib does not expose bytesRead, so default to pure JS */
+var _zlib;
+function use_zlib(zlib) { try {
+	var InflateRaw = zlib.InflateRaw;
+	var InflRaw = new InflateRaw();
+	InflRaw._processChunk(new Uint8Array([3, 0]), InflRaw._finishFlushFlag);
+	if(InflRaw.bytesRead) _zlib = zlib;
+	else throw new Error("zlib does not expose bytesRead");
+} catch(e) {console.error("cannot use native zlib: " + (e.message || e)); } }
+
+function _inflateRawSync(payload, usz) {
+	if(!_zlib) return _inflate(payload, usz);
+	var InflateRaw = _zlib.InflateRaw;
+	var InflRaw = new InflateRaw();
+	var out = InflRaw._processChunk(payload.slice(payload.l), InflRaw._finishFlushFlag);
+	payload.l += InflRaw.bytesRead;
+	return out;
+}
+
+function _deflateRawSync(payload) {
+	return _zlib ? _zlib.deflateRawSync(payload) : _deflate(payload);
+}
+var CLEN_ORDER = [ 16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15 ];
+
+/*  LEN_ID = [ 257, 258, 259, 260, 261, 262, 263, 264, 265, 266, 267, 268, 269, 270, 271, 272, 273, 274, 275, 276, 277, 278, 279, 280, 281, 282, 283, 284, 285 ]; */
+var LEN_LN = [   3,   4,   5,   6,   7,   8,   9,  10,  11,  13 , 15,  17,  19,  23,  27,  31,  35,  43,  51,  59,  67,  83,  99, 115, 131, 163, 195, 227, 258 ];
+
+/*  DST_ID = [  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13,  14,  15,  16,  17,  18,  19,   20,   21,   22,   23,   24,   25,   26,    27,    28,    29 ]; */
+var DST_LN = [  1,  2,  3,  4,  5,  7,  9, 13, 17, 25, 33, 49, 65, 97, 129, 193, 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577 ];
+
+function bit_swap_8(n) { var t = (((((n<<1)|(n<<11)) & 0x22110) | (((n<<5)|(n<<15)) & 0x88440))); return ((t>>16) | (t>>8) |t)&0xFF; }
+
+var use_typed_arrays = typeof Uint8Array !== 'undefined';
+
+var bitswap8 = use_typed_arrays ? new Uint8Array(1<<8) : [];
+for(var q = 0; q < (1<<8); ++q) bitswap8[q] = bit_swap_8(q);
+
+function bit_swap_n(n, b) {
+	var rev = bitswap8[n & 0xFF];
+	if(b <= 8) return rev >>> (8-b);
+	rev = (rev << 8) | bitswap8[(n>>8)&0xFF];
+	if(b <= 16) return rev >>> (16-b);
+	rev = (rev << 8) | bitswap8[(n>>16)&0xFF];
+	return rev >>> (24-b);
+}
+
+/* helpers for unaligned bit reads */
+function read_bits_2(buf, bl) { var w = (bl&7), h = (bl>>>3); return ((buf[h]|(w <= 6 ? 0 : buf[h+1]<<8))>>>w)& 0x03; }
+function read_bits_3(buf, bl) { var w = (bl&7), h = (bl>>>3); return ((buf[h]|(w <= 5 ? 0 : buf[h+1]<<8))>>>w)& 0x07; }
+function read_bits_4(buf, bl) { var w = (bl&7), h = (bl>>>3); return ((buf[h]|(w <= 4 ? 0 : buf[h+1]<<8))>>>w)& 0x0F; }
+function read_bits_5(buf, bl) { var w = (bl&7), h = (bl>>>3); return ((buf[h]|(w <= 3 ? 0 : buf[h+1]<<8))>>>w)& 0x1F; }
+function read_bits_7(buf, bl) { var w = (bl&7), h = (bl>>>3); return ((buf[h]|(w <= 1 ? 0 : buf[h+1]<<8))>>>w)& 0x7F; }
+
+/* works up to n = 3 * 8 + 1 = 25 */
+function read_bits_n(buf, bl, n) {
+	var w = (bl&7), h = (bl>>>3), f = ((1<<n)-1);
+	var v = buf[h] >>> w;
+	if(n < 8 - w) return v & f;
+	v |= buf[h+1]<<(8-w);
+	if(n < 16 - w) return v & f;
+	v |= buf[h+2]<<(16-w);
+	if(n < 24 - w) return v & f;
+	v |= buf[h+3]<<(24-w);
+	return v & f;
+}
+
+/* helpers for unaligned bit writes */
+function write_bits_3(buf, bl, v) { var w = bl & 7, h = bl >>> 3;
+	if(w <= 5) buf[h] |= (v & 7) << w;
+	else {
+		buf[h] |= (v << w) & 0xFF;
+		buf[h+1] = (v&7) >> (8-w);
+	}
+	return bl + 3;
+}
+
+function write_bits_1(buf, bl, v) {
+	var w = bl & 7, h = bl >>> 3;
+	v = (v&1) << w;
+	buf[h] |= v;
+	return bl + 1;
+}
+function write_bits_8(buf, bl, v) {
+	var w = bl & 7, h = bl >>> 3;
+	v <<= w;
+	buf[h] |=  v & 0xFF; v >>>= 8;
+	buf[h+1] = v;
+	return bl + 8;
+}
+function write_bits_16(buf, bl, v) {
+	var w = bl & 7, h = bl >>> 3;
+	v <<= w;
+	buf[h] |=  v & 0xFF; v >>>= 8;
+	buf[h+1] = v & 0xFF;
+	buf[h+2] = v >>> 8;
+	return bl + 16;
+}
+
+/* until ArrayBuffer#realloc is a thing, fake a realloc */
+function realloc(b, sz) {
+	var L = b.length, M = 2*L > sz ? 2*L : sz + 5, i = 0;
+	if(L >= sz) return b;
+	if(has_buf) {
+		var o = new_unsafe_buf(M);
+		// $FlowIgnore
+		if(b.copy) b.copy(o);
+		else for(; i < b.length; ++i) o[i] = b[i];
+		return o;
+	} else if(use_typed_arrays) {
+		var a = new Uint8Array(M);
+		if(a.set) a.set(b);
+		else for(; i < L; ++i) a[i] = b[i];
+		return a;
+	}
+	b.length = M;
+	return b;
+}
+
+/* zero-filled arrays for older browsers */
+function zero_fill_array(n) {
+	var o = new Array(n);
+	for(var i = 0; i < n; ++i) o[i] = 0;
+	return o;
+}
+
+/* build tree (used for literals and lengths) */
+function build_tree(clens, cmap, MAX) {
+	var maxlen = 1, w = 0, i = 0, j = 0, ccode = 0, L = clens.length;
+
+	var bl_count  = use_typed_arrays ? new Uint16Array(32) : zero_fill_array(32);
+	for(i = 0; i < 32; ++i) bl_count[i] = 0;
+
+	for(i = L; i < MAX; ++i) clens[i] = 0;
+	L = clens.length;
+
+	var ctree = use_typed_arrays ? new Uint16Array(L) : zero_fill_array(L); // []
+
+	/* build code tree */
+	for(i = 0; i < L; ++i) {
+		bl_count[(w = clens[i])]++;
+		if(maxlen < w) maxlen = w;
+		ctree[i] = 0;
+	}
+	bl_count[0] = 0;
+	for(i = 1; i <= maxlen; ++i) bl_count[i+16] = (ccode = (ccode + bl_count[i-1])<<1);
+	for(i = 0; i < L; ++i) {
+		ccode = clens[i];
+		if(ccode != 0) ctree[i] = bl_count[ccode+16]++;
+	}
+
+	/* cmap[maxlen + 4 bits] = (off&15) + (lit<<4) reverse mapping */
+	var cleni = 0;
+	for(i = 0; i < L; ++i) {
+		cleni = clens[i];
+		if(cleni != 0) {
+			ccode = bit_swap_n(ctree[i], maxlen)>>(maxlen-cleni);
+			for(j = (1<<(maxlen + 4 - cleni)) - 1; j>=0; --j)
+				cmap[ccode|(j<<cleni)] = (cleni&15) | (i<<4);
+		}
+	}
+	return maxlen;
+}
+
+/* Fixed Huffman */
+var fix_lmap = use_typed_arrays ? new Uint16Array(512) : zero_fill_array(512);
+var fix_dmap = use_typed_arrays ? new Uint16Array(32)  : zero_fill_array(32);
+if(!use_typed_arrays) {
+	for(var i = 0; i < 512; ++i) fix_lmap[i] = 0;
+	for(i = 0; i < 32; ++i) fix_dmap[i] = 0;
+}
+(function() {
+	var dlens = [];
+	var i = 0;
+	for(;i<32; i++) dlens.push(5);
+	build_tree(dlens, fix_dmap, 32);
+
+	var clens = [];
+	i = 0;
+	for(; i<=143; i++) clens.push(8);
+	for(; i<=255; i++) clens.push(9);
+	for(; i<=279; i++) clens.push(7);
+	for(; i<=287; i++) clens.push(8);
+	build_tree(clens, fix_lmap, 288);
+})();var _deflateRaw = (function _deflateRawIIFE() {
+	var DST_LN_RE = use_typed_arrays ? new Uint8Array(0x8000) : [];
+	var j = 0, k = 0;
+	for(; j < DST_LN.length - 1; ++j) {
+		for(; k < DST_LN[j+1]; ++k) DST_LN_RE[k] = j;
+	}
+	for(;k < 32768; ++k) DST_LN_RE[k] = 29;
+
+	var LEN_LN_RE = use_typed_arrays ? new Uint8Array(0x103) : [];
+	for(j = 0, k = 0; j < LEN_LN.length - 1; ++j) {
+		for(; k < LEN_LN[j+1]; ++k) LEN_LN_RE[k] = j;
+	}
+
+	function write_stored(data, out) {
+		var boff = 0;
+		while(boff < data.length) {
+			var L = Math.min(0xFFFF, data.length - boff);
+			var h = boff + L == data.length;
+			out.write_shift(1, +h);
+			out.write_shift(2, L);
+			out.write_shift(2, (~L) & 0xFFFF);
+			while(L-- > 0) out[out.l++] = data[boff++];
+		}
+		return out.l;
+	}
+
+	/* Fixed Huffman */
+	function write_huff_fixed(data, out) {
+		var bl = 0;
+		var boff = 0;
+		var addrs = use_typed_arrays ? new Uint16Array(0x8000) : [];
+		while(boff < data.length) {
+			var L = /* data.length - boff; */ Math.min(0xFFFF, data.length - boff);
+
+			/* write a stored block for short data */
+			if(L < 10) {
+				bl = write_bits_3(out, bl, +!!(boff + L == data.length)); // jshint ignore:line
+				if(bl & 7) bl += 8 - (bl & 7);
+				out.l = (bl / 8) | 0;
+				out.write_shift(2, L);
+				out.write_shift(2, (~L) & 0xFFFF);
+				while(L-- > 0) out[out.l++] = data[boff++];
+				bl = out.l * 8;
+				continue;
+			}
+
+			bl = write_bits_3(out, bl, +!!(boff + L == data.length) + 2); // jshint ignore:line
+			var hash = 0;
+			while(L-- > 0) {
+				var d = data[boff];
+				hash = ((hash << 5) ^ d) & 0x7FFF;
+
+				var match = -1, mlen = 0;
+
+				if((match = addrs[hash])) {
+					match |= boff & ~0x7FFF;
+					if(match > boff) match -= 0x8000;
+					if(match < boff) while(data[match + mlen] == data[boff + mlen] && mlen < 250) ++mlen;
+				}
+
+				if(mlen > 2) {
+					/* Copy Token  */
+					d = LEN_LN_RE[mlen];
+					if(d <= 22) bl = write_bits_8(out, bl, bitswap8[d+1]>>1) - 1;
+					else {
+						write_bits_8(out, bl, 3);
+						bl += 5;
+						write_bits_8(out, bl, bitswap8[d-23]>>5);
+						bl += 3;
+					}
+					var len_eb = (d < 8) ? 0 : ((d - 4)>>2);
+					if(len_eb > 0) {
+						write_bits_16(out, bl, mlen - LEN_LN[d]);
+						bl += len_eb;
+					}
+
+					d = DST_LN_RE[boff - match];
+					bl = write_bits_8(out, bl, bitswap8[d]>>3);
+					bl -= 3;
+
+					var dst_eb = d < 4 ? 0 : (d-2)>>1;
+					if(dst_eb > 0) {
+						write_bits_16(out, bl, boff - match - DST_LN[d]);
+						bl += dst_eb;
+					}
+					for(var q = 0; q < mlen; ++q) {
+						addrs[hash] = boff & 0x7FFF;
+						hash = ((hash << 5) ^ data[boff]) & 0x7FFF;
+						++boff;
+					}
+					L-= mlen - 1;
+				} else {
+					/* Literal Token */
+					if(d <= 143) d = d + 48;
+					else bl = write_bits_1(out, bl, 1);
+					bl = write_bits_8(out, bl, bitswap8[d]);
+					addrs[hash] = boff & 0x7FFF;
+					++boff;
+				}
+			}
+
+			bl = write_bits_8(out, bl, 0) - 1;
+		}
+		out.l = ((bl + 7)/8)|0;
+		return out.l;
+	}
+	return function _deflateRaw(data, out) {
+		if(data.length < 8) return write_stored(data, out);
+		return write_huff_fixed(data, out);
+	};
+})();
+
+function _deflate(data) {
+	var buf = new_buf(50+Math.floor(data.length*1.1));
+	var off = _deflateRaw(data, buf);
+	return buf.slice(0, off);
+}
+/* modified inflate function also moves original read head */
+
+var dyn_lmap = use_typed_arrays ? new Uint16Array(32768) : zero_fill_array(32768);
+var dyn_dmap = use_typed_arrays ? new Uint16Array(32768) : zero_fill_array(32768);
+var dyn_cmap = use_typed_arrays ? new Uint16Array(128)   : zero_fill_array(128);
+var dyn_len_1 = 1, dyn_len_2 = 1;
+
+/* 5.5.3 Expanding Huffman Codes */
+function dyn(data, boff) {
+	/* nomenclature from RFC1951 refers to bit values; these are offset by the implicit constant */
+	var _HLIT = read_bits_5(data, boff) + 257; boff += 5;
+	var _HDIST = read_bits_5(data, boff) + 1; boff += 5;
+	var _HCLEN = read_bits_4(data, boff) + 4; boff += 4;
+	var w = 0;
+
+	/* grab and store code lengths */
+	var clens = use_typed_arrays ? new Uint8Array(19) : zero_fill_array(19);
+	var ctree = [ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ];
+	var maxlen = 1;
+	var bl_count =  use_typed_arrays ? new Uint8Array(8) : zero_fill_array(8);
+	var next_code = use_typed_arrays ? new Uint8Array(8) : zero_fill_array(8);
+	var L = clens.length; /* 19 */
+	for(var i = 0; i < _HCLEN; ++i) {
+		clens[CLEN_ORDER[i]] = w = read_bits_3(data, boff);
+		if(maxlen < w) maxlen = w;
+		bl_count[w]++;
+		boff += 3;
+	}
+
+	/* build code tree */
+	var ccode = 0;
+	bl_count[0] = 0;
+	for(i = 1; i <= maxlen; ++i) next_code[i] = ccode = (ccode + bl_count[i-1])<<1;
+	for(i = 0; i < L; ++i) if((ccode = clens[i]) != 0) ctree[i] = next_code[ccode]++;
+	/* cmap[7 bits from stream] = (off&7) + (lit<<3) */
+	var cleni = 0;
+	for(i = 0; i < L; ++i) {
+		cleni = clens[i];
+		if(cleni != 0) {
+			ccode = bitswap8[ctree[i]]>>(8-cleni);
+			for(var j = (1<<(7-cleni))-1; j>=0; --j) dyn_cmap[ccode|(j<<cleni)] = (cleni&7) | (i<<3);
+		}
+	}
+
+	/* read literal and dist codes at once */
+	var hcodes = [];
+	maxlen = 1;
+	for(; hcodes.length < _HLIT + _HDIST;) {
+		ccode = dyn_cmap[read_bits_7(data, boff)];
+		boff += ccode & 7;
+		switch((ccode >>>= 3)) {
+			case 16:
+				w = 3 + read_bits_2(data, boff); boff += 2;
+				ccode = hcodes[hcodes.length - 1];
+				while(w-- > 0) hcodes.push(ccode);
+				break;
+			case 17:
+				w = 3 + read_bits_3(data, boff); boff += 3;
+				while(w-- > 0) hcodes.push(0);
+				break;
+			case 18:
+				w = 11 + read_bits_7(data, boff); boff += 7;
+				while(w -- > 0) hcodes.push(0);
+				break;
+			default:
+				hcodes.push(ccode);
+				if(maxlen < ccode) maxlen = ccode;
+				break;
+		}
+	}
+
+	/* build literal / length trees */
+	var h1 = hcodes.slice(0, _HLIT), h2 = hcodes.slice(_HLIT);
+	for(i = _HLIT; i < 286; ++i) h1[i] = 0;
+	for(i = _HDIST; i < 30; ++i) h2[i] = 0;
+	dyn_len_1 = build_tree(h1, dyn_lmap, 286);
+	dyn_len_2 = build_tree(h2, dyn_dmap, 30);
+	return boff;
+}
+
+/* return [ data, bytesRead ] */
+function inflate(data, usz) {
+	/* shortcircuit for empty buffer [0x03, 0x00] */
+	if(data[0] == 3 && !(data[1] & 0x3)) { return [new_raw_buf(usz), 2]; }
+
+	/* bit offset */
+	var boff = 0;
+
+	/* header includes final bit and type bits */
+	var header = 0;
+
+	var outbuf = new_unsafe_buf(usz ? usz : (1<<18));
+	var woff = 0;
+	var OL = outbuf.length>>>0;
+	var max_len_1 = 0, max_len_2 = 0;
+
+	while((header&1) == 0) {
+		header = read_bits_3(data, boff); boff += 3;
+		if((header >>> 1) == 0) {
+			/* Stored block */
+			if(boff & 7) boff += 8 - (boff&7);
+			/* 2 bytes sz, 2 bytes bit inverse */
+			var sz = data[boff>>>3] | data[(boff>>>3)+1]<<8;
+			boff += 32;
+			/* push sz bytes */
+			if(sz > 0) {
+				if(!usz && OL < woff + sz) { outbuf = realloc(outbuf, woff + sz); OL = outbuf.length; }
+				while(sz-- > 0) { outbuf[woff++] = data[boff>>>3]; boff += 8; }
+			}
+			continue;
+		} else if((header >> 1) == 1) {
+			/* Fixed Huffman */
+			max_len_1 = 9; max_len_2 = 5;
+		} else {
+			/* Dynamic Huffman */
+			boff = dyn(data, boff);
+			max_len_1 = dyn_len_1; max_len_2 = dyn_len_2;
+		}
+		for(;;) { // while(true) is apparently out of vogue in modern JS circles
+			if(!usz && (OL < woff + 32767)) { outbuf = realloc(outbuf, woff + 32767); OL = outbuf.length; }
+			/* ingest code and move read head */
+			var bits = read_bits_n(data, boff, max_len_1);
+			var code = (header>>>1) == 1 ? fix_lmap[bits] : dyn_lmap[bits];
+			boff += code & 15; code >>>= 4;
+			/* 0-255 are literals, 256 is end of block token, 257+ are copy tokens */
+			if(((code>>>8)&0xFF) === 0) outbuf[woff++] = code;
+			else if(code == 256) break;
+			else {
+				code -= 257;
+				var len_eb = (code < 8) ? 0 : ((code-4)>>2); if(len_eb > 5) len_eb = 0;
+				var tgt = woff + LEN_LN[code];
+				/* length extra bits */
+				if(len_eb > 0) {
+					tgt += read_bits_n(data, boff, len_eb);
+					boff += len_eb;
+				}
+
+				/* dist code */
+				bits = read_bits_n(data, boff, max_len_2);
+				code = (header>>>1) == 1 ? fix_dmap[bits] : dyn_dmap[bits];
+				boff += code & 15; code >>>= 4;
+				var dst_eb = (code < 4 ? 0 : (code-2)>>1);
+				var dst = DST_LN[code];
+				/* dist extra bits */
+				if(dst_eb > 0) {
+					dst += read_bits_n(data, boff, dst_eb);
+					boff += dst_eb;
+				}
+
+				/* in the common case, manual byte copy is faster than TA set / Buffer copy */
+				if(!usz && OL < tgt) { outbuf = realloc(outbuf, tgt + 100); OL = outbuf.length; }
+				while(woff < tgt) { outbuf[woff] = outbuf[woff - dst]; ++woff; }
+			}
+		}
+	}
+	if(usz) return [outbuf, (boff+7)>>>3];
+	return [outbuf.slice(0, woff), (boff+7)>>>3];
+}
+
+function _inflate(payload, usz) {
+	var data = payload.slice(payload.l||0);
+	var out = inflate(data, usz);
+	payload.l += out[1];
+	return out[0];
+}
+
+function warn_or_throw(wrn, msg) {
+	if(wrn) { if(typeof console !== 'undefined') console.error(msg); }
+	else throw new Error(msg);
+}
+
+function parse_zip(file, options) {
+	var blob = file;
+	prep_blob(blob, 0);
+
+	var FileIndex = [], FullPaths = [];
+	var o = {
+		FileIndex: FileIndex,
+		FullPaths: FullPaths
+	};
+	init_cfb(o, { root: options.root });
+
+	/* find end of central directory, start just after signature */
+	var i = blob.length - 4;
+	while((blob[i] != 0x50 || blob[i+1] != 0x4b || blob[i+2] != 0x05 || blob[i+3] != 0x06) && i >= 0) --i;
+	blob.l = i + 4;
+
+	/* parse end of central directory */
+	blob.l += 4;
+	var fcnt = blob.read_shift(2);
+	blob.l += 6;
+	var start_cd = blob.read_shift(4);
+
+	/* parse central directory */
+	blob.l = start_cd;
+
+	for(i = 0; i < fcnt; ++i) {
+		/* trust local file header instead of CD entry */
+		blob.l += 20;
+		var csz = blob.read_shift(4);
+		var usz = blob.read_shift(4);
+		var namelen = blob.read_shift(2);
+		var efsz = blob.read_shift(2);
+		var fcsz = blob.read_shift(2);
+		blob.l += 8;
+		var offset = blob.read_shift(4);
+		var EF = parse_extra_field(blob.slice(blob.l+namelen, blob.l+namelen+efsz));
+		blob.l += namelen + efsz + fcsz;
+
+		var L = blob.l;
+		blob.l = offset + 4;
+		parse_local_file(blob, csz, usz, o, EF);
+		blob.l = L;
+	}
+
+	return o;
+}
+
+
+/* head starts just after local file header signature */
+function parse_local_file(blob, csz, usz, o, EF) {
+	/* [local file header] */
+	blob.l += 2;
+	var flags = blob.read_shift(2);
+	var meth = blob.read_shift(2);
+	var date = parse_dos_date(blob);
+
+	if(flags & 0x2041) throw new Error("Unsupported ZIP encryption");
+	var crc32 = blob.read_shift(4);
+	var _csz = blob.read_shift(4);
+	var _usz = blob.read_shift(4);
+
+	var namelen = blob.read_shift(2);
+	var efsz = blob.read_shift(2);
+
+	// TODO: flags & (1<<11) // UTF8
+	var name = ""; for(var i = 0; i < namelen; ++i) name += String.fromCharCode(blob[blob.l++]);
+	if(efsz) {
+		var ef = parse_extra_field(blob.slice(blob.l, blob.l + efsz));
+		if((ef[0x5455]||{}).mt) date = ef[0x5455].mt;
+		if(((EF||{})[0x5455]||{}).mt) date = EF[0x5455].mt;
+	}
+	blob.l += efsz;
+
+	/* [encryption header] */
+
+	/* [file data] */
+	var data = blob.slice(blob.l, blob.l + _csz);
+	switch(meth) {
+		case 8: data = _inflateRawSync(blob, _usz); break;
+		case 0: break; // TODO: scan for magic number
+		default: throw new Error("Unsupported ZIP Compression method " + meth);
+	}
+
+	/* [data descriptor] */
+	var wrn = false;
+	if(flags & 8) {
+		crc32 = blob.read_shift(4);
+		if(crc32 == 0x08074b50) { crc32 = blob.read_shift(4); wrn = true; }
+		_csz = blob.read_shift(4);
+		_usz = blob.read_shift(4);
+	}
+
+	if(_csz != csz) warn_or_throw(wrn, "Bad compressed size: " + csz + " != " + _csz);
+	if(_usz != usz) warn_or_throw(wrn, "Bad uncompressed size: " + usz + " != " + _usz);
+	var _crc32 = CRC32.buf(data, 0);
+	if((crc32>>0) != (_crc32>>0)) warn_or_throw(wrn, "Bad CRC32 checksum: " + crc32 + " != " + _crc32);
+	cfb_add(o, name, data, {unsafe: true, mt: date});
+}
+function write_zip(cfb, options) {
+	var _opts = options || {};
+	var out = [], cdirs = [];
+	var o = new_buf(1);
+	var method = (_opts.compression ? 8 : 0), flags = 0;
+	var desc = false;
+	if(desc) flags |= 8;
+	var i = 0, j = 0;
+
+	var start_cd = 0, fcnt = 0;
+	var root = cfb.FullPaths[0], fp = root, fi = cfb.FileIndex[0];
+	var crcs = [];
+	var sz_cd = 0;
+
+	for(i = 1; i < cfb.FullPaths.length; ++i) {
+		fp = cfb.FullPaths[i].slice(root.length); fi = cfb.FileIndex[i];
+		if(!fi.size || !fi.content || fp == "\u0001Sh33tJ5") continue;
+		var start = start_cd;
+
+		/* TODO: CP437 filename */
+		var namebuf = new_buf(fp.length);
+		for(j = 0; j < fp.length; ++j) namebuf.write_shift(1, fp.charCodeAt(j) & 0x7F);
+		namebuf = namebuf.slice(0, namebuf.l);
+		crcs[fcnt] = CRC32.buf(fi.content, 0);
+
+		var outbuf = fi.content;
+		if(method == 8) outbuf = _deflateRawSync(outbuf);
+
+		/* local file header */
+		o = new_buf(30);
+		o.write_shift(4, 0x04034b50);
+		o.write_shift(2, 20);
+		o.write_shift(2, flags);
+		o.write_shift(2, method);
+		/* TODO: last mod file time/date */
+		if(fi.mt) write_dos_date(o, fi.mt);
+		else o.write_shift(4, 0);
+		o.write_shift(-4, (flags & 8) ? 0 : crcs[fcnt]);
+		o.write_shift(4,  (flags & 8) ? 0 : outbuf.length);
+		o.write_shift(4,  (flags & 8) ? 0 : fi.content.length);
+		o.write_shift(2, namebuf.length);
+		o.write_shift(2, 0);
+
+		start_cd += o.length;
+		out.push(o);
+		start_cd += namebuf.length;
+		out.push(namebuf);
+
+		/* TODO: extra fields? */
+
+		/* TODO: encryption header ? */
+
+		start_cd += outbuf.length;
+		out.push(outbuf);
+
+		/* data descriptor */
+		if(flags & 8) {
+			o = new_buf(12);
+			o.write_shift(-4, crcs[fcnt]);
+			o.write_shift(4, outbuf.length);
+			o.write_shift(4, fi.content.length);
+			start_cd += o.l;
+			out.push(o);
+		}
+
+		/* central directory */
+		o = new_buf(46);
+		o.write_shift(4, 0x02014b50);
+		o.write_shift(2, 0);
+		o.write_shift(2, 20);
+		o.write_shift(2, flags);
+		o.write_shift(2, method);
+		o.write_shift(4, 0); /* TODO: last mod file time/date */
+		o.write_shift(-4, crcs[fcnt]);
+
+		o.write_shift(4, outbuf.length);
+		o.write_shift(4, fi.content.length);
+		o.write_shift(2, namebuf.length);
+		o.write_shift(2, 0);
+		o.write_shift(2, 0);
+		o.write_shift(2, 0);
+		o.write_shift(2, 0);
+		o.write_shift(4, 0);
+		o.write_shift(4, start);
+
+		sz_cd += o.l;
+		cdirs.push(o);
+		sz_cd += namebuf.length;
+		cdirs.push(namebuf);
+		++fcnt;
+	}
+
+	/* end of central directory */
+	o = new_buf(22);
+	o.write_shift(4, 0x06054b50);
+	o.write_shift(2, 0);
+	o.write_shift(2, 0);
+	o.write_shift(2, fcnt);
+	o.write_shift(2, fcnt);
+	o.write_shift(4, sz_cd);
+	o.write_shift(4, start_cd);
+	o.write_shift(2, 0);
+
+	return bconcat(([bconcat((out)), bconcat(cdirs), o]));
+}
+var ContentTypeMap = ({
+	"htm": "text/html",
+	"xml": "text/xml",
+
+	"gif": "image/gif",
+	"jpg": "image/jpeg",
+	"png": "image/png",
+
+	"mso": "application/x-mso",
+	"thmx": "application/vnd.ms-officetheme",
+	"sh33tj5": "application/octet-stream"
+});
+
+function get_content_type(fi, fp) {
+	if(fi.ctype) return fi.ctype;
+
+	var ext = fi.name || "", m = ext.match(/\.([^\.]+)$/);
+	if(m && ContentTypeMap[m[1]]) return ContentTypeMap[m[1]];
+
+	if(fp) {
+		m = (ext = fp).match(/[\.\\]([^\.\\])+$/);
+		if(m && ContentTypeMap[m[1]]) return ContentTypeMap[m[1]];
+	}
+
+	return "application/octet-stream";
+}
+
+/* 76 character chunks TODO: intertwine encoding */
+function write_base64_76(bstr) {
+	var data = Base64_encode(bstr);
+	var o = [];
+	for(var i = 0; i < data.length; i+= 76) o.push(data.slice(i, i+76));
+	return o.join("\r\n") + "\r\n";
+}
+
+/*
+Rules for QP:
+	- escape =## applies for all non-display characters and literal "="
+	- space or tab at end of line must be encoded
+	- \r\n newlines can be preserved, but bare \r and \n must be escaped
+	- lines must not exceed 76 characters, use soft breaks =\r\n
+
+TODO: Some files from word appear to write line extensions with bare equals:
+
+```
+<table class=3DMsoTableGrid border=3D1 cellspacing=3D0 cellpadding=3D0 width=
+="70%"
+```
+*/
+function write_quoted_printable(text) {
+	var encoded = text.replace(/[\x00-\x08\x0B\x0C\x0E-\x1F\x7E-\xFF=]/g, function(c) {
+		var w = c.charCodeAt(0).toString(16).toUpperCase();
+		return "=" + (w.length == 1 ? "0" + w : w);
+	});
+
+	encoded = encoded.replace(/ $/mg, "=20").replace(/\t$/mg, "=09");
+
+	if(encoded.charAt(0) == "\n") encoded = "=0D" + encoded.slice(1);
+	encoded = encoded.replace(/\r(?!\n)/mg, "=0D").replace(/\n\n/mg, "\n=0A").replace(/([^\r\n])\n/mg, "$1=0A");
+
+	var o = [], split = encoded.split("\r\n");
+	for(var si = 0; si < split.length; ++si) {
+		var str = split[si];
+		if(str.length == 0) { o.push(""); continue; }
+		for(var i = 0; i < str.length;) {
+			var end = 76;
+			var tmp = str.slice(i, i + end);
+			if(tmp.charAt(end - 1) == "=") end --;
+			else if(tmp.charAt(end - 2) == "=") end -= 2;
+			else if(tmp.charAt(end - 3) == "=") end -= 3;
+			tmp = str.slice(i, i + end);
+			i += end;
+			if(i < str.length) tmp += "=";
+			o.push(tmp);
+		}
+	}
+
+	return o.join("\r\n");
+}
+function parse_quoted_printable(data) {
+	var o = [];
+
+	/* unify long lines */
+	for(var di = 0; di < data.length; ++di) {
+		var line = data[di];
+		while(di <= data.length && line.charAt(line.length - 1) == "=") line = line.slice(0, line.length - 1) + data[++di];
+		o.push(line);
+	}
+
+	/* decode */
+	for(var oi = 0; oi < o.length; ++oi) o[oi] = o[oi].replace(/[=][0-9A-Fa-f]{2}/g, function($$) { return String.fromCharCode(parseInt($$.slice(1), 16)); });
+	return s2a(o.join("\r\n"));
+}
+
+
+function parse_mime(cfb, data, root) {
+	var fname = "", cte = "", ctype = "", fdata;
+	var di = 0;
+	for(;di < 10; ++di) {
+		var line = data[di];
+		if(!line || line.match(/^\s*$/)) break;
+		var m = line.match(/^(.*?):\s*([^\s].*)$/);
+		if(m) switch(m[1].toLowerCase()) {
+			case "content-location": fname = m[2].trim(); break;
+			case "content-type": ctype = m[2].trim(); break;
+			case "content-transfer-encoding": cte = m[2].trim(); break;
+		}
+	}
+	++di;
+	switch(cte.toLowerCase()) {
+		case 'base64': fdata = s2a(Base64_decode(data.slice(di).join(""))); break;
+		case 'quoted-printable': fdata = parse_quoted_printable(data.slice(di)); break;
+		default: throw new Error("Unsupported Content-Transfer-Encoding " + cte);
+	}
+	var file = cfb_add(cfb, fname.slice(root.length), fdata, {unsafe: true});
+	if(ctype) file.ctype = ctype;
+}
+
+function parse_mad(file, options) {
+	if(a2s(file.slice(0,13)).toLowerCase() != "mime-version:") throw new Error("Unsupported MAD header");
+	var root = (options && options.root || "");
+	// $FlowIgnore
+	var data = (has_buf && Buffer.isBuffer(file) ? file.toString("binary") : a2s(file)).split("\r\n");
+	var di = 0, row = "";
+
+	/* if root is not specified, scan for the common prefix */
+	for(di = 0; di < data.length; ++di) {
+		row = data[di];
+		if(!/^Content-Location:/i.test(row)) continue;
+		row = row.slice(row.indexOf("file"));
+		if(!root) root = row.slice(0, row.lastIndexOf("/") + 1);
+		if(row.slice(0, root.length) == root) continue;
+		while(root.length > 0) {
+			root = root.slice(0, root.length - 1);
+			root = root.slice(0, root.lastIndexOf("/") + 1);
+			if(row.slice(0,root.length) == root) break;
+		}
+	}
+
+	var mboundary = (data[1] || "").match(/boundary="(.*?)"/);
+	if(!mboundary) throw new Error("MAD cannot find boundary");
+	var boundary = "--" + (mboundary[1] || "");
+
+	var FileIndex = [], FullPaths = [];
+	var o = {
+		FileIndex: FileIndex,
+		FullPaths: FullPaths
+	};
+	init_cfb(o);
+	var start_di, fcnt = 0;
+	for(di = 0; di < data.length; ++di) {
+		var line = data[di];
+		if(line !== boundary && line !== boundary + "--") continue;
+		if(fcnt++) parse_mime(o, data.slice(start_di, di), root);
+		start_di = di;
+	}
+	return o;
+}
+
+function write_mad(cfb, options) {
+	var opts = options || {};
+	var boundary = opts.boundary || "SheetJS";
+	boundary = '------=' + boundary;
+
+	var out = [
+		'MIME-Version: 1.0',
+		'Content-Type: multipart/related; boundary="' + boundary.slice(2) + '"',
+		'',
+		'',
+		''
+	];
+
+	var root = cfb.FullPaths[0], fp = root, fi = cfb.FileIndex[0];
+	for(var i = 1; i < cfb.FullPaths.length; ++i) {
+		fp = cfb.FullPaths[i].slice(root.length);
+		fi = cfb.FileIndex[i];
+		if(!fi.size || !fi.content || fp == "\u0001Sh33tJ5") continue;
+
+		/* Normalize filename */
+		fp = fp.replace(/[\x00-\x08\x0B\x0C\x0E-\x1F\x7E-\xFF]/g, function(c) {
+			return "_x" + c.charCodeAt(0).toString(16) + "_";
+		}).replace(/[\u0080-\uFFFF]/g, function(u) {
+			return "_u" + u.charCodeAt(0).toString(16) + "_";
+		});
+
+		/* Extract content as binary string */
+		var ca = fi.content;
+		// $FlowIgnore
+		var cstr = has_buf && Buffer.isBuffer(ca) ? ca.toString("binary") : a2s(ca);
+
+		/* 4/5 of first 1024 chars ascii -> quoted printable, else base64 */
+		var dispcnt = 0, L = Math.min(1024, cstr.length), cc = 0;
+		for(var csl = 0; csl <= L; ++csl) if((cc=cstr.charCodeAt(csl)) >= 0x20 && cc < 0x80) ++dispcnt;
+		var qp = dispcnt >= L * 4 / 5;
+
+		out.push(boundary);
+		out.push('Content-Location: ' + (opts.root || 'file:///C:/SheetJS/') + fp);
+		out.push('Content-Transfer-Encoding: ' + (qp ? 'quoted-printable' : 'base64'));
+		out.push('Content-Type: ' + get_content_type(fi, fp));
+		out.push('');
+
+		out.push(qp ? write_quoted_printable(cstr) : write_base64_76(cstr));
+	}
+	out.push(boundary + '--\r\n');
+	return out.join("\r\n");
+}
+function cfb_new(opts) {
+	var o = ({});
+	init_cfb(o, opts);
+	return o;
+}
+
+function cfb_add(cfb, name, content, opts) {
+	var unsafe = opts && opts.unsafe;
+	if(!unsafe) init_cfb(cfb);
+	var file = !unsafe && CFB.find(cfb, name);
+	if(!file) {
+		var fpath = cfb.FullPaths[0];
+		if(name.slice(0, fpath.length) == fpath) fpath = name;
+		else {
+			if(fpath.slice(-1) != "/") fpath += "/";
+			fpath = (fpath + name).replace("//","/");
+		}
+		file = ({name: filename(name), type: 2});
+		cfb.FileIndex.push(file);
+		cfb.FullPaths.push(fpath);
+		if(!unsafe) CFB.utils.cfb_gc(cfb);
+	}
+file.content = (content);
+	file.size = content ? content.length : 0;
+	if(opts) {
+		if(opts.CLSID) file.clsid = opts.CLSID;
+		if(opts.mt) file.mt = opts.mt;
+		if(opts.ct) file.ct = opts.ct;
+	}
+	return file;
+}
+
+function cfb_del(cfb, name) {
+	init_cfb(cfb);
+	var file = CFB.find(cfb, name);
+	if(file) for(var j = 0; j < cfb.FileIndex.length; ++j) if(cfb.FileIndex[j] == file) {
+		cfb.FileIndex.splice(j, 1);
+		cfb.FullPaths.splice(j, 1);
+		return true;
+	}
+	return false;
+}
+
+function cfb_mov(cfb, old_name, new_name) {
+	init_cfb(cfb);
+	var file = CFB.find(cfb, old_name);
+	if(file) for(var j = 0; j < cfb.FileIndex.length; ++j) if(cfb.FileIndex[j] == file) {
+		cfb.FileIndex[j].name = filename(new_name);
+		cfb.FullPaths[j] = new_name;
+		return true;
+	}
+	return false;
+}
+
+function cfb_gc(cfb) { rebuild_cfb(cfb, true); }
+
+exports.find = find;
+exports.read = read;
+exports.parse = parse;
+exports.write = write;
+exports.writeFile = write_file;
+exports.utils = {
+	cfb_new: cfb_new,
+	cfb_add: cfb_add,
+	cfb_del: cfb_del,
+	cfb_mov: cfb_mov,
+	cfb_gc: cfb_gc,
+	ReadShift: ReadShift,
+	CheckField: CheckField,
+	prep_blob: prep_blob,
+	bconcat: bconcat,
+	use_zlib: use_zlib,
+	_deflateRaw: _deflate,
+	_inflateRaw: _inflate,
+	consts: consts
+};
+
+return exports;
+})();
+
+if(typeof require !== 'undefined' && typeof module !== 'undefined' && typeof DO_NOT_EXPORT_CFB === 'undefined') { module.exports = CFB; }
+
+}).call(this)}).call(this,require('_process'),require("buffer").Buffer)
+},{"_process":8,"buffer":6,"fs":5}],2:[function(require,module,exports){
+(function (global){(function (){
+var cfb = require('cfb')
+const fs = require('fs');
+
+global.window.cfb = cfb
+
+}).call(this)}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
+},{"cfb":1,"fs":3}],3:[function(require,module,exports){
+
+},{}],4:[function(require,module,exports){
+'use strict'
+
+exports.byteLength = byteLength
+exports.toByteArray = toByteArray
+exports.fromByteArray = fromByteArray
+
+var lookup = []
+var revLookup = []
+var Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array
+
+var code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
+for (var i = 0, len = code.length; i < len; ++i) {
+  lookup[i] = code[i]
+  revLookup[code.charCodeAt(i)] = i
+}
+
+// Support decoding URL-safe base64 strings, as Node.js does.
+// See: https://en.wikipedia.org/wiki/Base64#URL_applications
+revLookup['-'.charCodeAt(0)] = 62
+revLookup['_'.charCodeAt(0)] = 63
+
+function getLens (b64) {
+  var len = b64.length
+
+  if (len % 4 > 0) {
+    throw new Error('Invalid string. Length must be a multiple of 4')
+  }
+
+  // Trim off extra bytes after placeholder bytes are found
+  // See: https://github.com/beatgammit/base64-js/issues/42
+  var validLen = b64.indexOf('=')
+  if (validLen === -1) validLen = len
+
+  var placeHoldersLen = validLen === len
+    ? 0
+    : 4 - (validLen % 4)
+
+  return [validLen, placeHoldersLen]
+}
+
+// base64 is 4/3 + up to two characters of the original data
+function byteLength (b64) {
+  var lens = getLens(b64)
+  var validLen = lens[0]
+  var placeHoldersLen = lens[1]
+  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen
+}
+
+function _byteLength (b64, validLen, placeHoldersLen) {
+  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen
+}
+
+function toByteArray (b64) {
+  var tmp
+  var lens = getLens(b64)
+  var validLen = lens[0]
+  var placeHoldersLen = lens[1]
+
+  var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen))
+
+  var curByte = 0
+
+  // if there are placeholders, only get up to the last complete 4 chars
+  var len = placeHoldersLen > 0
+    ? validLen - 4
+    : validLen
+
+  var i
+  for (i = 0; i < len; i += 4) {
+    tmp =
+      (revLookup[b64.charCodeAt(i)] << 18) |
+      (revLookup[b64.charCodeAt(i + 1)] << 12) |
+      (revLookup[b64.charCodeAt(i + 2)] << 6) |
+      revLookup[b64.charCodeAt(i + 3)]
+    arr[curByte++] = (tmp >> 16) & 0xFF
+    arr[curByte++] = (tmp >> 8) & 0xFF
+    arr[curByte++] = tmp & 0xFF
+  }
+
+  if (placeHoldersLen === 2) {
+    tmp =
+      (revLookup[b64.charCodeAt(i)] << 2) |
+      (revLookup[b64.charCodeAt(i + 1)] >> 4)
+    arr[curByte++] = tmp & 0xFF
+  }
+
+  if (placeHoldersLen === 1) {
+    tmp =
+      (revLookup[b64.charCodeAt(i)] << 10) |
+      (revLookup[b64.charCodeAt(i + 1)] << 4) |
+      (revLookup[b64.charCodeAt(i + 2)] >> 2)
+    arr[curByte++] = (tmp >> 8) & 0xFF
+    arr[curByte++] = tmp & 0xFF
+  }
+
+  return arr
+}
+
+function tripletToBase64 (num) {
+  return lookup[num >> 18 & 0x3F] +
+    lookup[num >> 12 & 0x3F] +
+    lookup[num >> 6 & 0x3F] +
+    lookup[num & 0x3F]
+}
+
+function encodeChunk (uint8, start, end) {
+  var tmp
+  var output = []
+  for (var i = start; i < end; i += 3) {
+    tmp =
+      ((uint8[i] << 16) & 0xFF0000) +
+      ((uint8[i + 1] << 8) & 0xFF00) +
+      (uint8[i + 2] & 0xFF)
+    output.push(tripletToBase64(tmp))
+  }
+  return output.join('')
+}
+
+function fromByteArray (uint8) {
+  var tmp
+  var len = uint8.length
+  var extraBytes = len % 3 // if we have 1 byte left, pad 2 bytes
+  var parts = []
+  var maxChunkLength = 16383 // must be multiple of 3
+
+  // go through the array every three bytes, we'll deal with trailing stuff later
+  for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {
+    parts.push(encodeChunk(uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)))
+  }
+
+  // pad the end with zeros, but make sure to not forget the extra bytes
+  if (extraBytes === 1) {
+    tmp = uint8[len - 1]
+    parts.push(
+      lookup[tmp >> 2] +
+      lookup[(tmp << 4) & 0x3F] +
+      '=='
+    )
+  } else if (extraBytes === 2) {
+    tmp = (uint8[len - 2] << 8) + uint8[len - 1]
+    parts.push(
+      lookup[tmp >> 10] +
+      lookup[(tmp >> 4) & 0x3F] +
+      lookup[(tmp << 2) & 0x3F] +
+      '='
+    )
+  }
+
+  return parts.join('')
+}
+
+},{}],5:[function(require,module,exports){
+arguments[4][3][0].apply(exports,arguments)
+},{"dup":3}],6:[function(require,module,exports){
+(function (Buffer){(function (){
+/*!
+ * The buffer module from node.js, for the browser.
+ *
+ * @author   Feross Aboukhadijeh <https://feross.org>
+ * @license  MIT
+ */
+/* eslint-disable no-proto */
+
+'use strict'
+
+var base64 = require('base64-js')
+var ieee754 = require('ieee754')
+
+exports.Buffer = Buffer
+exports.SlowBuffer = SlowBuffer
+exports.INSPECT_MAX_BYTES = 50
+
+var K_MAX_LENGTH = 0x7fffffff
+exports.kMaxLength = K_MAX_LENGTH
+
+/**
+ * If `Buffer.TYPED_ARRAY_SUPPORT`:
+ *   === true    Use Uint8Array implementation (fastest)
+ *   === false   Print warning and recommend using `buffer` v4.x which has an Object
+ *               implementation (most compatible, even IE6)
+ *
+ * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
+ * Opera 11.6+, iOS 4.2+.
+ *
+ * We report that the browser does not support typed arrays if the are not subclassable
+ * using __proto__. Firefox 4-29 lacks support for adding new properties to `Uint8Array`
+ * (See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438). IE 10 lacks support
+ * for __proto__ and has a buggy typed array implementation.
+ */
+Buffer.TYPED_ARRAY_SUPPORT = typedArraySupport()
+
+if (!Buffer.TYPED_ARRAY_SUPPORT && typeof console !== 'undefined' &&
+    typeof console.error === 'function') {
+  console.error(
+    'This browser lacks typed array (Uint8Array) support which is required by ' +
+    '`buffer` v5.x. Use `buffer` v4.x if you require old browser support.'
+  )
+}
+
+function typedArraySupport () {
+  // Can typed array instances can be augmented?
+  try {
+    var arr = new Uint8Array(1)
+    arr.__proto__ = { __proto__: Uint8Array.prototype, foo: function () { return 42 } }
+    return arr.foo() === 42
+  } catch (e) {
+    return false
+  }
+}
+
+Object.defineProperty(Buffer.prototype, 'parent', {
+  enumerable: true,
+  get: function () {
+    if (!Buffer.isBuffer(this)) return undefined
+    return this.buffer
+  }
+})
+
+Object.defineProperty(Buffer.prototype, 'offset', {
+  enumerable: true,
+  get: function () {
+    if (!Buffer.isBuffer(this)) return undefined
+    return this.byteOffset
+  }
+})
+
+function createBuffer (length) {
+  if (length > K_MAX_LENGTH) {
+    throw new RangeError('The value "' + length + '" is invalid for option "size"')
+  }
+  // Return an augmented `Uint8Array` instance
+  var buf = new Uint8Array(length)
+  buf.__proto__ = Buffer.prototype
+  return buf
+}
+
+/**
+ * The Buffer constructor returns instances of `Uint8Array` that have their
+ * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of
+ * `Uint8Array`, so the returned instances will have all the node `Buffer` methods
+ * and the `Uint8Array` methods. Square bracket notation works as expected -- it
+ * returns a single octet.
+ *
+ * The `Uint8Array` prototype remains unmodified.
+ */
+
+function Buffer (arg, encodingOrOffset, length) {
+  // Common case.
+  if (typeof arg === 'number') {
+    if (typeof encodingOrOffset === 'string') {
+      throw new TypeError(
+        'The "string" argument must be of type string. Received type number'
+      )
+    }
+    return allocUnsafe(arg)
+  }
+  return from(arg, encodingOrOffset, length)
+}
+
+// Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97
+if (typeof Symbol !== 'undefined' && Symbol.species != null &&
+    Buffer[Symbol.species] === Buffer) {
+  Object.defineProperty(Buffer, Symbol.species, {
+    value: null,
+    configurable: true,
+    enumerable: false,
+    writable: false
+  })
+}
+
+Buffer.poolSize = 8192 // not used by this implementation
+
+function from (value, encodingOrOffset, length) {
+  if (typeof value === 'string') {
+    return fromString(value, encodingOrOffset)
+  }
+
+  if (ArrayBuffer.isView(value)) {
+    return fromArrayLike(value)
+  }
+
+  if (value == null) {
+    throw TypeError(
+      'The first argument must be one of type string, Buffer, ArrayBuffer, Array, ' +
+      'or Array-like Object. Received type ' + (typeof value)
+    )
+  }
+
+  if (isInstance(value, ArrayBuffer) ||
+      (value && isInstance(value.buffer, ArrayBuffer))) {
+    return fromArrayBuffer(value, encodingOrOffset, length)
+  }
+
+  if (typeof value === 'number') {
+    throw new TypeError(
+      'The "value" argument must not be of type number. Received type number'
+    )
+  }
+
+  var valueOf = value.valueOf && value.valueOf()
+  if (valueOf != null && valueOf !== value) {
+    return Buffer.from(valueOf, encodingOrOffset, length)
+  }
+
+  var b = fromObject(value)
+  if (b) return b
+
+  if (typeof Symbol !== 'undefined' && Symbol.toPrimitive != null &&
+      typeof value[Symbol.toPrimitive] === 'function') {
+    return Buffer.from(
+      value[Symbol.toPrimitive]('string'), encodingOrOffset, length
+    )
+  }
+
+  throw new TypeError(
+    'The first argument must be one of type string, Buffer, ArrayBuffer, Array, ' +
+    'or Array-like Object. Received type ' + (typeof value)
+  )
+}
+
+/**
+ * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError
+ * if value is a number.
+ * Buffer.from(str[, encoding])
+ * Buffer.from(array)
+ * Buffer.from(buffer)
+ * Buffer.from(arrayBuffer[, byteOffset[, length]])
+ **/
+Buffer.from = function (value, encodingOrOffset, length) {
+  return from(value, encodingOrOffset, length)
+}
+
+// Note: Change prototype *after* Buffer.from is defined to workaround Chrome bug:
+// https://github.com/feross/buffer/pull/148
+Buffer.prototype.__proto__ = Uint8Array.prototype
+Buffer.__proto__ = Uint8Array
+
+function assertSize (size) {
+  if (typeof size !== 'number') {
+    throw new TypeError('"size" argument must be of type number')
+  } else if (size < 0) {
+    throw new RangeError('The value "' + size + '" is invalid for option "size"')
+  }
+}
+
+function alloc (size, fill, encoding) {
+  assertSize(size)
+  if (size <= 0) {
+    return createBuffer(size)
+  }
+  if (fill !== undefined) {
+    // Only pay attention to encoding if it's a string. This
+    // prevents accidentally sending in a number that would
+    // be interpretted as a start offset.
+    return typeof encoding === 'string'
+      ? createBuffer(size).fill(fill, encoding)
+      : createBuffer(size).fill(fill)
+  }
+  return createBuffer(size)
+}
+
+/**
+ * Creates a new filled Buffer instance.
+ * alloc(size[, fill[, encoding]])
+ **/
+Buffer.alloc = function (size, fill, encoding) {
+  return alloc(size, fill, encoding)
+}
+
+function allocUnsafe (size) {
+  assertSize(size)
+  return createBuffer(size < 0 ? 0 : checked(size) | 0)
+}
+
+/**
+ * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.
+ * */
+Buffer.allocUnsafe = function (size) {
+  return allocUnsafe(size)
+}
+/**
+ * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.
+ */
+Buffer.allocUnsafeSlow = function (size) {
+  return allocUnsafe(size)
+}
+
+function fromString (string, encoding) {
+  if (typeof encoding !== 'string' || encoding === '') {
+    encoding = 'utf8'
+  }
+
+  if (!Buffer.isEncoding(encoding)) {
+    throw new TypeError('Unknown encoding: ' + encoding)
+  }
+
+  var length = byteLength(string, encoding) | 0
+  var buf = createBuffer(length)
+
+  var actual = buf.write(string, encoding)
+
+  if (actual !== length) {
+    // Writing a hex string, for example, that contains invalid characters will
+    // cause everything after the first invalid character to be ignored. (e.g.
+    // 'abxxcd' will be treated as 'ab')
+    buf = buf.slice(0, actual)
+  }
+
+  return buf
+}
+
+function fromArrayLike (array) {
+  var length = array.length < 0 ? 0 : checked(array.length) | 0
+  var buf = createBuffer(length)
+  for (var i = 0; i < length; i += 1) {
+    buf[i] = array[i] & 255
+  }
+  return buf
+}
+
+function fromArrayBuffer (array, byteOffset, length) {
+  if (byteOffset < 0 || array.byteLength < byteOffset) {
+    throw new RangeError('"offset" is outside of buffer bounds')
+  }
+
+  if (array.byteLength < byteOffset + (length || 0)) {
+    throw new RangeError('"length" is outside of buffer bounds')
+  }
+
+  var buf
+  if (byteOffset === undefined && length === undefined) {
+    buf = new Uint8Array(array)
+  } else if (length === undefined) {
+    buf = new Uint8Array(array, byteOffset)
+  } else {
+    buf = new Uint8Array(array, byteOffset, length)
+  }
+
+  // Return an augmented `Uint8Array` instance
+  buf.__proto__ = Buffer.prototype
+  return buf
+}
+
+function fromObject (obj) {
+  if (Buffer.isBuffer(obj)) {
+    var len = checked(obj.length) | 0
+    var buf = createBuffer(len)
+
+    if (buf.length === 0) {
+      return buf
+    }
+
+    obj.copy(buf, 0, 0, len)
+    return buf
+  }
+
+  if (obj.length !== undefined) {
+    if (typeof obj.length !== 'number' || numberIsNaN(obj.length)) {
+      return createBuffer(0)
+    }
+    return fromArrayLike(obj)
+  }
+
+  if (obj.type === 'Buffer' && Array.isArray(obj.data)) {
+    return fromArrayLike(obj.data)
+  }
+}
+
+function checked (length) {
+  // Note: cannot use `length < K_MAX_LENGTH` here because that fails when
+  // length is NaN (which is otherwise coerced to zero.)
+  if (length >= K_MAX_LENGTH) {
+    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
+                         'size: 0x' + K_MAX_LENGTH.toString(16) + ' bytes')
+  }
+  return length | 0
+}
+
+function SlowBuffer (length) {
+  if (+length != length) { // eslint-disable-line eqeqeq
+    length = 0
+  }
+  return Buffer.alloc(+length)
+}
+
+Buffer.isBuffer = function isBuffer (b) {
+  return b != null && b._isBuffer === true &&
+    b !== Buffer.prototype // so Buffer.isBuffer(Buffer.prototype) will be false
+}
+
+Buffer.compare = function compare (a, b) {
+  if (isInstance(a, Uint8Array)) a = Buffer.from(a, a.offset, a.byteLength)
+  if (isInstance(b, Uint8Array)) b = Buffer.from(b, b.offset, b.byteLength)
+  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
+    throw new TypeError(
+      'The "buf1", "buf2" arguments must be one of type Buffer or Uint8Array'
+    )
+  }
+
+  if (a === b) return 0
+
+  var x = a.length
+  var y = b.length
+
+  for (var i = 0, len = Math.min(x, y); i < len; ++i) {
+    if (a[i] !== b[i]) {
+      x = a[i]
+      y = b[i]
+      break
+    }
+  }
+
+  if (x < y) return -1
+  if (y < x) return 1
+  return 0
+}
+
+Buffer.isEncoding = function isEncoding (encoding) {
+  switch (String(encoding).toLowerCase()) {
+    case 'hex':
+    case 'utf8':
+    case 'utf-8':
+    case 'ascii':
+    case 'latin1':
+    case 'binary':
+    case 'base64':
+    case 'ucs2':
+    case 'ucs-2':
+    case 'utf16le':
+    case 'utf-16le':
+      return true
+    default:
+      return false
+  }
+}
+
+Buffer.concat = function concat (list, length) {
+  if (!Array.isArray(list)) {
+    throw new TypeError('"list" argument must be an Array of Buffers')
+  }
+
+  if (list.length === 0) {
+    return Buffer.alloc(0)
+  }
+
+  var i
+  if (length === undefined) {
+    length = 0
+    for (i = 0; i < list.length; ++i) {
+      length += list[i].length
+    }
+  }
+
+  var buffer = Buffer.allocUnsafe(length)
+  var pos = 0
+  for (i = 0; i < list.length; ++i) {
+    var buf = list[i]
+    if (isInstance(buf, Uint8Array)) {
+      buf = Buffer.from(buf)
+    }
+    if (!Buffer.isBuffer(buf)) {
+      throw new TypeError('"list" argument must be an Array of Buffers')
+    }
+    buf.copy(buffer, pos)
+    pos += buf.length
+  }
+  return buffer
+}
+
+function byteLength (string, encoding) {
+  if (Buffer.isBuffer(string)) {
+    return string.length
+  }
+  if (ArrayBuffer.isView(string) || isInstance(string, ArrayBuffer)) {
+    return string.byteLength
+  }
+  if (typeof string !== 'string') {
+    throw new TypeError(
+      'The "string" argument must be one of type string, Buffer, or ArrayBuffer. ' +
+      'Received type ' + typeof string
+    )
+  }
+
+  var len = string.length
+  var mustMatch = (arguments.length > 2 && arguments[2] === true)
+  if (!mustMatch && len === 0) return 0
+
+  // Use a for loop to avoid recursion
+  var loweredCase = false
+  for (;;) {
+    switch (encoding) {
+      case 'ascii':
+      case 'latin1':
+      case 'binary':
+        return len
+      case 'utf8':
+      case 'utf-8':
+        return utf8ToBytes(string).length
+      case 'ucs2':
+      case 'ucs-2':
+      case 'utf16le':
+      case 'utf-16le':
+        return len * 2
+      case 'hex':
+        return len >>> 1
+      case 'base64':
+        return base64ToBytes(string).length
+      default:
+        if (loweredCase) {
+          return mustMatch ? -1 : utf8ToBytes(string).length // assume utf8
+        }
+        encoding = ('' + encoding).toLowerCase()
+        loweredCase = true
+    }
+  }
+}
+Buffer.byteLength = byteLength
+
+function slowToString (encoding, start, end) {
+  var loweredCase = false
+
+  // No need to verify that "this.length <= MAX_UINT32" since it's a read-only
+  // property of a typed array.
+
+  // This behaves neither like String nor Uint8Array in that we set start/end
+  // to their upper/lower bounds if the value passed is out of range.
+  // undefined is handled specially as per ECMA-262 6th Edition,
+  // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.
+  if (start === undefined || start < 0) {
+    start = 0
+  }
+  // Return early if start > this.length. Done here to prevent potential uint32
+  // coercion fail below.
+  if (start > this.length) {
+    return ''
+  }
+
+  if (end === undefined || end > this.length) {
+    end = this.length
+  }
+
+  if (end <= 0) {
+    return ''
+  }
+
+  // Force coersion to uint32. This will also coerce falsey/NaN values to 0.
+  end >>>= 0
+  start >>>= 0
+
+  if (end <= start) {
+    return ''
+  }
+
+  if (!encoding) encoding = 'utf8'
+
+  while (true) {
+    switch (encoding) {
+      case 'hex':
+        return hexSlice(this, start, end)
+
+      case 'utf8':
+      case 'utf-8':
+        return utf8Slice(this, start, end)
+
+      case 'ascii':
+        return asciiSlice(this, start, end)
+
+      case 'latin1':
+      case 'binary':
+        return latin1Slice(this, start, end)
+
+      case 'base64':
+        return base64Slice(this, start, end)
+
+      case 'ucs2':
+      case 'ucs-2':
+      case 'utf16le':
+      case 'utf-16le':
+        return utf16leSlice(this, start, end)
+
+      default:
+        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
+        encoding = (encoding + '').toLowerCase()
+        loweredCase = true
+    }
+  }
+}
+
+// This property is used by `Buffer.isBuffer` (and the `is-buffer` npm package)
+// to detect a Buffer instance. It's not possible to use `instanceof Buffer`
+// reliably in a browserify context because there could be multiple different
+// copies of the 'buffer' package in use. This method works even for Buffer
+// instances that were created from another copy of the `buffer` package.
+// See: https://github.com/feross/buffer/issues/154
+Buffer.prototype._isBuffer = true
+
+function swap (b, n, m) {
+  var i = b[n]
+  b[n] = b[m]
+  b[m] = i
+}
+
+Buffer.prototype.swap16 = function swap16 () {
+  var len = this.length
+  if (len % 2 !== 0) {
+    throw new RangeError('Buffer size must be a multiple of 16-bits')
+  }
+  for (var i = 0; i < len; i += 2) {
+    swap(this, i, i + 1)
+  }
+  return this
+}
+
+Buffer.prototype.swap32 = function swap32 () {
+  var len = this.length
+  if (len % 4 !== 0) {
+    throw new RangeError('Buffer size must be a multiple of 32-bits')
+  }
+  for (var i = 0; i < len; i += 4) {
+    swap(this, i, i + 3)
+    swap(this, i + 1, i + 2)
+  }
+  return this
+}
+
+Buffer.prototype.swap64 = function swap64 () {
+  var len = this.length
+  if (len % 8 !== 0) {
+    throw new RangeError('Buffer size must be a multiple of 64-bits')
+  }
+  for (var i = 0; i < len; i += 8) {
+    swap(this, i, i + 7)
+    swap(this, i + 1, i + 6)
+    swap(this, i + 2, i + 5)
+    swap(this, i + 3, i + 4)
+  }
+  return this
+}
+
+Buffer.prototype.toString = function toString () {
+  var length = this.length
+  if (length === 0) return ''
+  if (arguments.length === 0) return utf8Slice(this, 0, length)
+  return slowToString.apply(this, arguments)
+}
+
+Buffer.prototype.toLocaleString = Buffer.prototype.toString
+
+Buffer.prototype.equals = function equals (b) {
+  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
+  if (this === b) return true
+  return Buffer.compare(this, b) === 0
+}
+
+Buffer.prototype.inspect = function inspect () {
+  var str = ''
+  var max = exports.INSPECT_MAX_BYTES
+  str = this.toString('hex', 0, max).replace(/(.{2})/g, '$1 ').trim()
+  if (this.length > max) str += ' ... '
+  return '<Buffer ' + str + '>'
+}
+
+Buffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {
+  if (isInstance(target, Uint8Array)) {
+    target = Buffer.from(target, target.offset, target.byteLength)
+  }
+  if (!Buffer.isBuffer(target)) {
+    throw new TypeError(
+      'The "target" argument must be one of type Buffer or Uint8Array. ' +
+      'Received type ' + (typeof target)
+    )
+  }
+
+  if (start === undefined) {
+    start = 0
+  }
+  if (end === undefined) {
+    end = target ? target.length : 0
+  }
+  if (thisStart === undefined) {
+    thisStart = 0
+  }
+  if (thisEnd === undefined) {
+    thisEnd = this.length
+  }
+
+  if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {
+    throw new RangeError('out of range index')
+  }
+
+  if (thisStart >= thisEnd && start >= end) {
+    return 0
+  }
+  if (thisStart >= thisEnd) {
+    return -1
+  }
+  if (start >= end) {
+    return 1
+  }
+
+  start >>>= 0
+  end >>>= 0
+  thisStart >>>= 0
+  thisEnd >>>= 0
+
+  if (this === target) return 0
+
+  var x = thisEnd - thisStart
+  var y = end - start
+  var len = Math.min(x, y)
+
+  var thisCopy = this.slice(thisStart, thisEnd)
+  var targetCopy = target.slice(start, end)
+
+  for (var i = 0; i < len; ++i) {
+    if (thisCopy[i] !== targetCopy[i]) {
+      x = thisCopy[i]
+      y = targetCopy[i]
+      break
+    }
+  }
+
+  if (x < y) return -1
+  if (y < x) return 1
+  return 0
+}
+
+// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,
+// OR the last index of `val` in `buffer` at offset <= `byteOffset`.
+//
+// Arguments:
+// - buffer - a Buffer to search
+// - val - a string, Buffer, or number
+// - byteOffset - an index into `buffer`; will be clamped to an int32
+// - encoding - an optional encoding, relevant is val is a string
+// - dir - true for indexOf, false for lastIndexOf
+function bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) {
+  // Empty buffer means no match
+  if (buffer.length === 0) return -1
+
+  // Normalize byteOffset
+  if (typeof byteOffset === 'string') {
+    encoding = byteOffset
+    byteOffset = 0
+  } else if (byteOffset > 0x7fffffff) {
+    byteOffset = 0x7fffffff
+  } else if (byteOffset < -0x80000000) {
+    byteOffset = -0x80000000
+  }
+  byteOffset = +byteOffset // Coerce to Number.
+  if (numberIsNaN(byteOffset)) {
+    // byteOffset: it it's undefined, null, NaN, "foo", etc, search whole buffer
+    byteOffset = dir ? 0 : (buffer.length - 1)
+  }
+
+  // Normalize byteOffset: negative offsets start from the end of the buffer
+  if (byteOffset < 0) byteOffset = buffer.length + byteOffset
+  if (byteOffset >= buffer.length) {
+    if (dir) return -1
+    else byteOffset = buffer.length - 1
+  } else if (byteOffset < 0) {
+    if (dir) byteOffset = 0
+    else return -1
+  }
+
+  // Normalize val
+  if (typeof val === 'string') {
+    val = Buffer.from(val, encoding)
+  }
+
+  // Finally, search either indexOf (if dir is true) or lastIndexOf
+  if (Buffer.isBuffer(val)) {
+    // Special case: looking for empty string/buffer always fails
+    if (val.length === 0) {
+      return -1
+    }
+    return arrayIndexOf(buffer, val, byteOffset, encoding, dir)
+  } else if (typeof val === 'number') {
+    val = val & 0xFF // Search for a byte value [0-255]
+    if (typeof Uint8Array.prototype.indexOf === 'function') {
+      if (dir) {
+        return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)
+      } else {
+        return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)
+      }
+    }
+    return arrayIndexOf(buffer, [ val ], byteOffset, encoding, dir)
+  }
+
+  throw new TypeError('val must be string, number or Buffer')
+}
+
+function arrayIndexOf (arr, val, byteOffset, encoding, dir) {
+  var indexSize = 1
+  var arrLength = arr.length
+  var valLength = val.length
+
+  if (encoding !== undefined) {
+    encoding = String(encoding).toLowerCase()
+    if (encoding === 'ucs2' || encoding === 'ucs-2' ||
+        encoding === 'utf16le' || encoding === 'utf-16le') {
+      if (arr.length < 2 || val.length < 2) {
+        return -1
+      }
+      indexSize = 2
+      arrLength /= 2
+      valLength /= 2
+      byteOffset /= 2
+    }
+  }
+
+  function read (buf, i) {
+    if (indexSize === 1) {
+      return buf[i]
+    } else {
+      return buf.readUInt16BE(i * indexSize)
+    }
+  }
+
+  var i
+  if (dir) {
+    var foundIndex = -1
+    for (i = byteOffset; i < arrLength; i++) {
+      if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {
+        if (foundIndex === -1) foundIndex = i
+        if (i - foundIndex + 1 === valLength) return foundIndex * indexSize
+      } else {
+        if (foundIndex !== -1) i -= i - foundIndex
+        foundIndex = -1
+      }
+    }
+  } else {
+    if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength
+    for (i = byteOffset; i >= 0; i--) {
+      var found = true
+      for (var j = 0; j < valLength; j++) {
+        if (read(arr, i + j) !== read(val, j)) {
+          found = false
+          break
+        }
+      }
+      if (found) return i
+    }
+  }
+
+  return -1
+}
+
+Buffer.prototype.includes = function includes (val, byteOffset, encoding) {
+  return this.indexOf(val, byteOffset, encoding) !== -1
+}
+
+Buffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {
+  return bidirectionalIndexOf(this, val, byteOffset, encoding, true)
+}
+
+Buffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) {
+  return bidirectionalIndexOf(this, val, byteOffset, encoding, false)
+}
+
+function hexWrite (buf, string, offset, length) {
+  offset = Number(offset) || 0
+  var remaining = buf.length - offset
+  if (!length) {
+    length = remaining
+  } else {
+    length = Number(length)
+    if (length > remaining) {
+      length = remaining
+    }
+  }
+
+  var strLen = string.length
+
+  if (length > strLen / 2) {
+    length = strLen / 2
+  }
+  for (var i = 0; i < length; ++i) {
+    var parsed = parseInt(string.substr(i * 2, 2), 16)
+    if (numberIsNaN(parsed)) return i
+    buf[offset + i] = parsed
+  }
+  return i
+}
+
+function utf8Write (buf, string, offset, length) {
+  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)
+}
+
+function asciiWrite (buf, string, offset, length) {
+  return blitBuffer(asciiToBytes(string), buf, offset, length)
+}
+
+function latin1Write (buf, string, offset, length) {
+  return asciiWrite(buf, string, offset, length)
+}
+
+function base64Write (buf, string, offset, length) {
+  return blitBuffer(base64ToBytes(string), buf, offset, length)
+}
+
+function ucs2Write (buf, string, offset, length) {
+  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)
+}
+
+Buffer.prototype.write = function write (string, offset, length, encoding) {
+  // Buffer#write(string)
+  if (offset === undefined) {
+    encoding = 'utf8'
+    length = this.length
+    offset = 0
+  // Buffer#write(string, encoding)
+  } else if (length === undefined && typeof offset === 'string') {
+    encoding = offset
+    length = this.length
+    offset = 0
+  // Buffer#write(string, offset[, length][, encoding])
+  } else if (isFinite(offset)) {
+    offset = offset >>> 0
+    if (isFinite(length)) {
+      length = length >>> 0
+      if (encoding === undefined) encoding = 'utf8'
+    } else {
+      encoding = length
+      length = undefined
+    }
+  } else {
+    throw new Error(
+      'Buffer.write(string, encoding, offset[, length]) is no longer supported'
+    )
+  }
+
+  var remaining = this.length - offset
+  if (length === undefined || length > remaining) length = remaining
+
+  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {
+    throw new RangeError('Attempt to write outside buffer bounds')
+  }
+
+  if (!encoding) encoding = 'utf8'
+
+  var loweredCase = false
+  for (;;) {
+    switch (encoding) {
+      case 'hex':
+        return hexWrite(this, string, offset, length)
+
+      case 'utf8':
+      case 'utf-8':
+        return utf8Write(this, string, offset, length)
+
+      case 'ascii':
+        return asciiWrite(this, string, offset, length)
+
+      case 'latin1':
+      case 'binary':
+        return latin1Write(this, string, offset, length)
+
+      case 'base64':
+        // Warning: maxLength not taken into account in base64Write
+        return base64Write(this, string, offset, length)
+
+      case 'ucs2':
+      case 'ucs-2':
+      case 'utf16le':
+      case 'utf-16le':
+        return ucs2Write(this, string, offset, length)
+
+      default:
+        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
+        encoding = ('' + encoding).toLowerCase()
+        loweredCase = true
+    }
+  }
+}
+
+Buffer.prototype.toJSON = function toJSON () {
+  return {
+    type: 'Buffer',
+    data: Array.prototype.slice.call(this._arr || this, 0)
+  }
+}
+
+function base64Slice (buf, start, end) {
+  if (start === 0 && end === buf.length) {
+    return base64.fromByteArray(buf)
+  } else {
+    return base64.fromByteArray(buf.slice(start, end))
+  }
+}
+
+function utf8Slice (buf, start, end) {
+  end = Math.min(buf.length, end)
+  var res = []
+
+  var i = start
+  while (i < end) {
+    var firstByte = buf[i]
+    var codePoint = null
+    var bytesPerSequence = (firstByte > 0xEF) ? 4
+      : (firstByte > 0xDF) ? 3
+        : (firstByte > 0xBF) ? 2
+          : 1
+
+    if (i + bytesPerSequence <= end) {
+      var secondByte, thirdByte, fourthByte, tempCodePoint
+
+      switch (bytesPerSequence) {
+        case 1:
+          if (firstByte < 0x80) {
+            codePoint = firstByte
+          }
+          break
+        case 2:
+          secondByte = buf[i + 1]
+          if ((secondByte & 0xC0) === 0x80) {
+            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)
+            if (tempCodePoint > 0x7F) {
+              codePoint = tempCodePoint
+            }
+          }
+          break
+        case 3:
+          secondByte = buf[i + 1]
+          thirdByte = buf[i + 2]
+          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {
+            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)
+            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {
+              codePoint = tempCodePoint
+            }
+          }
+          break
+        case 4:
+          secondByte = buf[i + 1]
+          thirdByte = buf[i + 2]
+          fourthByte = buf[i + 3]
+          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {
+            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)
+            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {
+              codePoint = tempCodePoint
+            }
+          }
+      }
+    }
+
+    if (codePoint === null) {
+      // we did not generate a valid codePoint so insert a
+      // replacement char (U+FFFD) and advance only 1 byte
+      codePoint = 0xFFFD
+      bytesPerSequence = 1
+    } else if (codePoint > 0xFFFF) {
+      // encode to utf16 (surrogate pair dance)
+      codePoint -= 0x10000
+      res.push(codePoint >>> 10 & 0x3FF | 0xD800)
+      codePoint = 0xDC00 | codePoint & 0x3FF
+    }
+
+    res.push(codePoint)
+    i += bytesPerSequence
+  }
+
+  return decodeCodePointsArray(res)
+}
+
+// Based on http://stackoverflow.com/a/22747272/680742, the browser with
+// the lowest limit is Chrome, with 0x10000 args.
+// We go 1 magnitude less, for safety
+var MAX_ARGUMENTS_LENGTH = 0x1000
+
+function decodeCodePointsArray (codePoints) {
+  var len = codePoints.length
+  if (len <= MAX_ARGUMENTS_LENGTH) {
+    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()
+  }
+
+  // Decode in chunks to avoid "call stack size exceeded".
+  var res = ''
+  var i = 0
+  while (i < len) {
+    res += String.fromCharCode.apply(
+      String,
+      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)
+    )
+  }
+  return res
+}
+
+function asciiSlice (buf, start, end) {
+  var ret = ''
+  end = Math.min(buf.length, end)
+
+  for (var i = start; i < end; ++i) {
+    ret += String.fromCharCode(buf[i] & 0x7F)
+  }
+  return ret
+}
+
+function latin1Slice (buf, start, end) {
+  var ret = ''
+  end = Math.min(buf.length, end)
+
+  for (var i = start; i < end; ++i) {
+    ret += String.fromCharCode(buf[i])
+  }
+  return ret
+}
+
+function hexSlice (buf, start, end) {
+  var len = buf.length
+
+  if (!start || start < 0) start = 0
+  if (!end || end < 0 || end > len) end = len
+
+  var out = ''
+  for (var i = start; i < end; ++i) {
+    out += toHex(buf[i])
+  }
+  return out
+}
+
+function utf16leSlice (buf, start, end) {
+  var bytes = buf.slice(start, end)
+  var res = ''
+  for (var i = 0; i < bytes.length; i += 2) {
+    res += String.fromCharCode(bytes[i] + (bytes[i + 1] * 256))
+  }
+  return res
+}
+
+Buffer.prototype.slice = function slice (start, end) {
+  var len = this.length
+  start = ~~start
+  end = end === undefined ? len : ~~end
+
+  if (start < 0) {
+    start += len
+    if (start < 0) start = 0
+  } else if (start > len) {
+    start = len
+  }
+
+  if (end < 0) {
+    end += len
+    if (end < 0) end = 0
+  } else if (end > len) {
+    end = len
+  }
+
+  if (end < start) end = start
+
+  var newBuf = this.subarray(start, end)
+  // Return an augmented `Uint8Array` instance
+  newBuf.__proto__ = Buffer.prototype
+  return newBuf
+}
+
+/*
+ * Need to make sure that buffer isn't trying to write out of bounds.
+ */
+function checkOffset (offset, ext, length) {
+  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')
+  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')
+}
+
+Buffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) checkOffset(offset, byteLength, this.length)
+
+  var val = this[offset]
+  var mul = 1
+  var i = 0
+  while (++i < byteLength && (mul *= 0x100)) {
+    val += this[offset + i] * mul
+  }
+
+  return val
+}
+
+Buffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) {
+    checkOffset(offset, byteLength, this.length)
+  }
+
+  var val = this[offset + --byteLength]
+  var mul = 1
+  while (byteLength > 0 && (mul *= 0x100)) {
+    val += this[offset + --byteLength] * mul
+  }
+
+  return val
+}
+
+Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 1, this.length)
+  return this[offset]
+}
+
+Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 2, this.length)
+  return this[offset] | (this[offset + 1] << 8)
+}
+
+Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 2, this.length)
+  return (this[offset] << 8) | this[offset + 1]
+}
+
+Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+
+  return ((this[offset]) |
+      (this[offset + 1] << 8) |
+      (this[offset + 2] << 16)) +
+      (this[offset + 3] * 0x1000000)
+}
+
+Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+
+  return (this[offset] * 0x1000000) +
+    ((this[offset + 1] << 16) |
+    (this[offset + 2] << 8) |
+    this[offset + 3])
+}
+
+Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) checkOffset(offset, byteLength, this.length)
+
+  var val = this[offset]
+  var mul = 1
+  var i = 0
+  while (++i < byteLength && (mul *= 0x100)) {
+    val += this[offset + i] * mul
+  }
+  mul *= 0x80
+
+  if (val >= mul) val -= Math.pow(2, 8 * byteLength)
+
+  return val
+}
+
+Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) checkOffset(offset, byteLength, this.length)
+
+  var i = byteLength
+  var mul = 1
+  var val = this[offset + --i]
+  while (i > 0 && (mul *= 0x100)) {
+    val += this[offset + --i] * mul
+  }
+  mul *= 0x80
+
+  if (val >= mul) val -= Math.pow(2, 8 * byteLength)
+
+  return val
+}
+
+Buffer.prototype.readInt8 = function readInt8 (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 1, this.length)
+  if (!(this[offset] & 0x80)) return (this[offset])
+  return ((0xff - this[offset] + 1) * -1)
+}
+
+Buffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 2, this.length)
+  var val = this[offset] | (this[offset + 1] << 8)
+  return (val & 0x8000) ? val | 0xFFFF0000 : val
+}
+
+Buffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 2, this.length)
+  var val = this[offset + 1] | (this[offset] << 8)
+  return (val & 0x8000) ? val | 0xFFFF0000 : val
+}
+
+Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+
+  return (this[offset]) |
+    (this[offset + 1] << 8) |
+    (this[offset + 2] << 16) |
+    (this[offset + 3] << 24)
+}
+
+Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+
+  return (this[offset] << 24) |
+    (this[offset + 1] << 16) |
+    (this[offset + 2] << 8) |
+    (this[offset + 3])
+}
+
+Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+  return ieee754.read(this, offset, true, 23, 4)
+}
+
+Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+  return ieee754.read(this, offset, false, 23, 4)
+}
+
+Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 8, this.length)
+  return ieee754.read(this, offset, true, 52, 8)
+}
+
+Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 8, this.length)
+  return ieee754.read(this, offset, false, 52, 8)
+}
+
+function checkInt (buf, value, offset, ext, max, min) {
+  if (!Buffer.isBuffer(buf)) throw new TypeError('"buffer" argument must be a Buffer instance')
+  if (value > max || value < min) throw new RangeError('"value" argument is out of bounds')
+  if (offset + ext > buf.length) throw new RangeError('Index out of range')
+}
+
+Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) {
+    var maxBytes = Math.pow(2, 8 * byteLength) - 1
+    checkInt(this, value, offset, byteLength, maxBytes, 0)
+  }
+
+  var mul = 1
+  var i = 0
+  this[offset] = value & 0xFF
+  while (++i < byteLength && (mul *= 0x100)) {
+    this[offset + i] = (value / mul) & 0xFF
+  }
+
+  return offset + byteLength
+}
+
+Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) {
+    var maxBytes = Math.pow(2, 8 * byteLength) - 1
+    checkInt(this, value, offset, byteLength, maxBytes, 0)
+  }
+
+  var i = byteLength - 1
+  var mul = 1
+  this[offset + i] = value & 0xFF
+  while (--i >= 0 && (mul *= 0x100)) {
+    this[offset + i] = (value / mul) & 0xFF
+  }
+
+  return offset + byteLength
+}
+
+Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)
+  this[offset] = (value & 0xff)
+  return offset + 1
+}
+
+Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
+  this[offset] = (value & 0xff)
+  this[offset + 1] = (value >>> 8)
+  return offset + 2
+}
+
+Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
+  this[offset] = (value >>> 8)
+  this[offset + 1] = (value & 0xff)
+  return offset + 2
+}
+
+Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
+  this[offset + 3] = (value >>> 24)
+  this[offset + 2] = (value >>> 16)
+  this[offset + 1] = (value >>> 8)
+  this[offset] = (value & 0xff)
+  return offset + 4
+}
+
+Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
+  this[offset] = (value >>> 24)
+  this[offset + 1] = (value >>> 16)
+  this[offset + 2] = (value >>> 8)
+  this[offset + 3] = (value & 0xff)
+  return offset + 4
+}
+
+Buffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) {
+    var limit = Math.pow(2, (8 * byteLength) - 1)
+
+    checkInt(this, value, offset, byteLength, limit - 1, -limit)
+  }
+
+  var i = 0
+  var mul = 1
+  var sub = 0
+  this[offset] = value & 0xFF
+  while (++i < byteLength && (mul *= 0x100)) {
+    if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {
+      sub = 1
+    }
+    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
+  }
+
+  return offset + byteLength
+}
+
+Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) {
+    var limit = Math.pow(2, (8 * byteLength) - 1)
+
+    checkInt(this, value, offset, byteLength, limit - 1, -limit)
+  }
+
+  var i = byteLength - 1
+  var mul = 1
+  var sub = 0
+  this[offset + i] = value & 0xFF
+  while (--i >= 0 && (mul *= 0x100)) {
+    if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {
+      sub = 1
+    }
+    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
+  }
+
+  return offset + byteLength
+}
+
+Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)
+  if (value < 0) value = 0xff + value + 1
+  this[offset] = (value & 0xff)
+  return offset + 1
+}
+
+Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
+  this[offset] = (value & 0xff)
+  this[offset + 1] = (value >>> 8)
+  return offset + 2
+}
+
+Buffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
+  this[offset] = (value >>> 8)
+  this[offset + 1] = (value & 0xff)
+  return offset + 2
+}
+
+Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
+  this[offset] = (value & 0xff)
+  this[offset + 1] = (value >>> 8)
+  this[offset + 2] = (value >>> 16)
+  this[offset + 3] = (value >>> 24)
+  return offset + 4
+}
+
+Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
+  if (value < 0) value = 0xffffffff + value + 1
+  this[offset] = (value >>> 24)
+  this[offset + 1] = (value >>> 16)
+  this[offset + 2] = (value >>> 8)
+  this[offset + 3] = (value & 0xff)
+  return offset + 4
+}
+
+function checkIEEE754 (buf, value, offset, ext, max, min) {
+  if (offset + ext > buf.length) throw new RangeError('Index out of range')
+  if (offset < 0) throw new RangeError('Index out of range')
+}
+
+function writeFloat (buf, value, offset, littleEndian, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) {
+    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)
+  }
+  ieee754.write(buf, value, offset, littleEndian, 23, 4)
+  return offset + 4
+}
+
+Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {
+  return writeFloat(this, value, offset, true, noAssert)
+}
+
+Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {
+  return writeFloat(this, value, offset, false, noAssert)
+}
+
+function writeDouble (buf, value, offset, littleEndian, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) {
+    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)
+  }
+  ieee754.write(buf, value, offset, littleEndian, 52, 8)
+  return offset + 8
+}
+
+Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {
+  return writeDouble(this, value, offset, true, noAssert)
+}
+
+Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {
+  return writeDouble(this, value, offset, false, noAssert)
+}
+
+// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
+Buffer.prototype.copy = function copy (target, targetStart, start, end) {
+  if (!Buffer.isBuffer(target)) throw new TypeError('argument should be a Buffer')
+  if (!start) start = 0
+  if (!end && end !== 0) end = this.length
+  if (targetStart >= target.length) targetStart = target.length
+  if (!targetStart) targetStart = 0
+  if (end > 0 && end < start) end = start
+
+  // Copy 0 bytes; we're done
+  if (end === start) return 0
+  if (target.length === 0 || this.length === 0) return 0
+
+  // Fatal error conditions
+  if (targetStart < 0) {
+    throw new RangeError('targetStart out of bounds')
+  }
+  if (start < 0 || start >= this.length) throw new RangeError('Index out of range')
+  if (end < 0) throw new RangeError('sourceEnd out of bounds')
+
+  // Are we oob?
+  if (end > this.length) end = this.length
+  if (target.length - targetStart < end - start) {
+    end = target.length - targetStart + start
+  }
+
+  var len = end - start
+
+  if (this === target && typeof Uint8Array.prototype.copyWithin === 'function') {
+    // Use built-in when available, missing from IE11
+    this.copyWithin(targetStart, start, end)
+  } else if (this === target && start < targetStart && targetStart < end) {
+    // descending copy from end
+    for (var i = len - 1; i >= 0; --i) {
+      target[i + targetStart] = this[i + start]
+    }
+  } else {
+    Uint8Array.prototype.set.call(
+      target,
+      this.subarray(start, end),
+      targetStart
+    )
+  }
+
+  return len
+}
+
+// Usage:
+//    buffer.fill(number[, offset[, end]])
+//    buffer.fill(buffer[, offset[, end]])
+//    buffer.fill(string[, offset[, end]][, encoding])
+Buffer.prototype.fill = function fill (val, start, end, encoding) {
+  // Handle string cases:
+  if (typeof val === 'string') {
+    if (typeof start === 'string') {
+      encoding = start
+      start = 0
+      end = this.length
+    } else if (typeof end === 'string') {
+      encoding = end
+      end = this.length
+    }
+    if (encoding !== undefined && typeof encoding !== 'string') {
+      throw new TypeError('encoding must be a string')
+    }
+    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {
+      throw new TypeError('Unknown encoding: ' + encoding)
+    }
+    if (val.length === 1) {
+      var code = val.charCodeAt(0)
+      if ((encoding === 'utf8' && code < 128) ||
+          encoding === 'latin1') {
+        // Fast path: If `val` fits into a single byte, use that numeric value.
+        val = code
+      }
+    }
+  } else if (typeof val === 'number') {
+    val = val & 255
+  }
+
+  // Invalid ranges are not set to a default, so can range check early.
+  if (start < 0 || this.length < start || this.length < end) {
+    throw new RangeError('Out of range index')
+  }
+
+  if (end <= start) {
+    return this
+  }
+
+  start = start >>> 0
+  end = end === undefined ? this.length : end >>> 0
+
+  if (!val) val = 0
+
+  var i
+  if (typeof val === 'number') {
+    for (i = start; i < end; ++i) {
+      this[i] = val
+    }
+  } else {
+    var bytes = Buffer.isBuffer(val)
+      ? val
+      : Buffer.from(val, encoding)
+    var len = bytes.length
+    if (len === 0) {
+      throw new TypeError('The value "' + val +
+        '" is invalid for argument "value"')
+    }
+    for (i = 0; i < end - start; ++i) {
+      this[i + start] = bytes[i % len]
+    }
+  }
+
+  return this
+}
+
+// HELPER FUNCTIONS
+// ================
+
+var INVALID_BASE64_RE = /[^+/0-9A-Za-z-_]/g
+
+function base64clean (str) {
+  // Node takes equal signs as end of the Base64 encoding
+  str = str.split('=')[0]
+  // Node strips out invalid characters like \n and \t from the string, base64-js does not
+  str = str.trim().replace(INVALID_BASE64_RE, '')
+  // Node converts strings with length < 2 to ''
+  if (str.length < 2) return ''
+  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
+  while (str.length % 4 !== 0) {
+    str = str + '='
+  }
+  return str
+}
+
+function toHex (n) {
+  if (n < 16) return '0' + n.toString(16)
+  return n.toString(16)
+}
+
+function utf8ToBytes (string, units) {
+  units = units || Infinity
+  var codePoint
+  var length = string.length
+  var leadSurrogate = null
+  var bytes = []
+
+  for (var i = 0; i < length; ++i) {
+    codePoint = string.charCodeAt(i)
+
+    // is surrogate component
+    if (codePoint > 0xD7FF && codePoint < 0xE000) {
+      // last char was a lead
+      if (!leadSurrogate) {
+        // no lead yet
+        if (codePoint > 0xDBFF) {
+          // unexpected trail
+          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+          continue
+        } else if (i + 1 === length) {
+          // unpaired lead
+          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+          continue
+        }
+
+        // valid lead
+        leadSurrogate = codePoint
+
+        continue
+      }
+
+      // 2 leads in a row
+      if (codePoint < 0xDC00) {
+        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+        leadSurrogate = codePoint
+        continue
+      }
+
+      // valid surrogate pair
+      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000
+    } else if (leadSurrogate) {
+      // valid bmp char, but last char was a lead
+      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+    }
+
+    leadSurrogate = null
+
+    // encode utf8
+    if (codePoint < 0x80) {
+      if ((units -= 1) < 0) break
+      bytes.push(codePoint)
+    } else if (codePoint < 0x800) {
+      if ((units -= 2) < 0) break
+      bytes.push(
+        codePoint >> 0x6 | 0xC0,
+        codePoint & 0x3F | 0x80
+      )
+    } else if (codePoint < 0x10000) {
+      if ((units -= 3) < 0) break
+      bytes.push(
+        codePoint >> 0xC | 0xE0,
+        codePoint >> 0x6 & 0x3F | 0x80,
+        codePoint & 0x3F | 0x80
+      )
+    } else if (codePoint < 0x110000) {
+      if ((units -= 4) < 0) break
+      bytes.push(
+        codePoint >> 0x12 | 0xF0,
+        codePoint >> 0xC & 0x3F | 0x80,
+        codePoint >> 0x6 & 0x3F | 0x80,
+        codePoint & 0x3F | 0x80
+      )
+    } else {
+      throw new Error('Invalid code point')
+    }
+  }
+
+  return bytes
+}
+
+function asciiToBytes (str) {
+  var byteArray = []
+  for (var i = 0; i < str.length; ++i) {
+    // Node's code seems to be doing this and not & 0x7F..
+    byteArray.push(str.charCodeAt(i) & 0xFF)
+  }
+  return byteArray
+}
+
+function utf16leToBytes (str, units) {
+  var c, hi, lo
+  var byteArray = []
+  for (var i = 0; i < str.length; ++i) {
+    if ((units -= 2) < 0) break
+
+    c = str.charCodeAt(i)
+    hi = c >> 8
+    lo = c % 256
+    byteArray.push(lo)
+    byteArray.push(hi)
+  }
+
+  return byteArray
+}
+
+function base64ToBytes (str) {
+  return base64.toByteArray(base64clean(str))
+}
+
+function blitBuffer (src, dst, offset, length) {
+  for (var i = 0; i < length; ++i) {
+    if ((i + offset >= dst.length) || (i >= src.length)) break
+    dst[i + offset] = src[i]
+  }
+  return i
+}
+
+// ArrayBuffer or Uint8Array objects from other contexts (i.e. iframes) do not pass
+// the `instanceof` check but they should be treated as of that type.
+// See: https://github.com/feross/buffer/issues/166
+function isInstance (obj, type) {
+  return obj instanceof type ||
+    (obj != null && obj.constructor != null && obj.constructor.name != null &&
+      obj.constructor.name === type.name)
+}
+function numberIsNaN (obj) {
+  // For IE11 support
+  return obj !== obj // eslint-disable-line no-self-compare
+}
+
+}).call(this)}).call(this,require("buffer").Buffer)
+},{"base64-js":4,"buffer":6,"ieee754":7}],7:[function(require,module,exports){
+/*! ieee754. BSD-3-Clause License. Feross Aboukhadijeh <https://feross.org/opensource> */
+exports.read = function (buffer, offset, isLE, mLen, nBytes) {
+  var e, m
+  var eLen = (nBytes * 8) - mLen - 1
+  var eMax = (1 << eLen) - 1
+  var eBias = eMax >> 1
+  var nBits = -7
+  var i = isLE ? (nBytes - 1) : 0
+  var d = isLE ? -1 : 1
+  var s = buffer[offset + i]
+
+  i += d
+
+  e = s & ((1 << (-nBits)) - 1)
+  s >>= (-nBits)
+  nBits += eLen
+  for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}
+
+  m = e & ((1 << (-nBits)) - 1)
+  e >>= (-nBits)
+  nBits += mLen
+  for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}
+
+  if (e === 0) {
+    e = 1 - eBias
+  } else if (e === eMax) {
+    return m ? NaN : ((s ? -1 : 1) * Infinity)
+  } else {
+    m = m + Math.pow(2, mLen)
+    e = e - eBias
+  }
+  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
+}
+
+exports.write = function (buffer, value, offset, isLE, mLen, nBytes) {
+  var e, m, c
+  var eLen = (nBytes * 8) - mLen - 1
+  var eMax = (1 << eLen) - 1
+  var eBias = eMax >> 1
+  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)
+  var i = isLE ? 0 : (nBytes - 1)
+  var d = isLE ? 1 : -1
+  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0
+
+  value = Math.abs(value)
+
+  if (isNaN(value) || value === Infinity) {
+    m = isNaN(value) ? 1 : 0
+    e = eMax
+  } else {
+    e = Math.floor(Math.log(value) / Math.LN2)
+    if (value * (c = Math.pow(2, -e)) < 1) {
+      e--
+      c *= 2
+    }
+    if (e + eBias >= 1) {
+      value += rt / c
+    } else {
+      value += rt * Math.pow(2, 1 - eBias)
+    }
+    if (value * c >= 2) {
+      e++
+      c /= 2
+    }
+
+    if (e + eBias >= eMax) {
+      m = 0
+      e = eMax
+    } else if (e + eBias >= 1) {
+      m = ((value * c) - 1) * Math.pow(2, mLen)
+      e = e + eBias
+    } else {
+      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)
+      e = 0
+    }
+  }
+
+  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
+
+  e = (e << mLen) | m
+  eLen += mLen
+  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
+
+  buffer[offset + i - d] |= s * 128
+}
+
+},{}],8:[function(require,module,exports){
+// shim for using process in browser
+var process = module.exports = {};
+
+// cached from whatever global is present so that test runners that stub it
+// don't break things.  But we need to wrap it in a try catch in case it is
+// wrapped in strict mode code which doesn't define any globals.  It's inside a
+// function because try/catches deoptimize in certain engines.
+
+var cachedSetTimeout;
+var cachedClearTimeout;
+
+function defaultSetTimout() {
+    throw new Error('setTimeout has not been defined');
+}
+function defaultClearTimeout () {
+    throw new Error('clearTimeout has not been defined');
+}
+(function () {
+    try {
+        if (typeof setTimeout === 'function') {
+            cachedSetTimeout = setTimeout;
+        } else {
+            cachedSetTimeout = defaultSetTimout;
+        }
+    } catch (e) {
+        cachedSetTimeout = defaultSetTimout;
+    }
+    try {
+        if (typeof clearTimeout === 'function') {
+            cachedClearTimeout = clearTimeout;
+        } else {
+            cachedClearTimeout = defaultClearTimeout;
+        }
+    } catch (e) {
+        cachedClearTimeout = defaultClearTimeout;
+    }
+} ())
+function runTimeout(fun) {
+    if (cachedSetTimeout === setTimeout) {
+        //normal enviroments in sane situations
+        return setTimeout(fun, 0);
+    }
+    // if setTimeout wasn't available but was latter defined
+    if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
+        cachedSetTimeout = setTimeout;
+        return setTimeout(fun, 0);
+    }
+    try {
+        // when when somebody has screwed with setTimeout but no I.E. maddness
+        return cachedSetTimeout(fun, 0);
+    } catch(e){
+        try {
+            // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
+            return cachedSetTimeout.call(null, fun, 0);
+        } catch(e){
+            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
+            return cachedSetTimeout.call(this, fun, 0);
+        }
+    }
+
+
+}
+function runClearTimeout(marker) {
+    if (cachedClearTimeout === clearTimeout) {
+        //normal enviroments in sane situations
+        return clearTimeout(marker);
+    }
+    // if clearTimeout wasn't available but was latter defined
+    if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
+        cachedClearTimeout = clearTimeout;
+        return clearTimeout(marker);
+    }
+    try {
+        // when when somebody has screwed with setTimeout but no I.E. maddness
+        return cachedClearTimeout(marker);
+    } catch (e){
+        try {
+            // When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally
+            return cachedClearTimeout.call(null, marker);
+        } catch (e){
+            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
+            // Some versions of I.E. have different rules for clearTimeout vs setTimeout
+            return cachedClearTimeout.call(this, marker);
+        }
+    }
+
+
+
+}
+var queue = [];
+var draining = false;
+var currentQueue;
+var queueIndex = -1;
+
+function cleanUpNextTick() {
+    if (!draining || !currentQueue) {
+        return;
+    }
+    draining = false;
+    if (currentQueue.length) {
+        queue = currentQueue.concat(queue);
+    } else {
+        queueIndex = -1;
+    }
+    if (queue.length) {
+        drainQueue();
+    }
+}
+
+function drainQueue() {
+    if (draining) {
+        return;
+    }
+    var timeout = runTimeout(cleanUpNextTick);
+    draining = true;
+
+    var len = queue.length;
+    while(len) {
+        currentQueue = queue;
+        queue = [];
+        while (++queueIndex < len) {
+            if (currentQueue) {
+                currentQueue[queueIndex].run();
+            }
+        }
+        queueIndex = -1;
+        len = queue.length;
+    }
+    currentQueue = null;
+    draining = false;
+    runClearTimeout(timeout);
+}
+
+process.nextTick = function (fun) {
+    var args = new Array(arguments.length - 1);
+    if (arguments.length > 1) {
+        for (var i = 1; i < arguments.length; i++) {
+            args[i - 1] = arguments[i];
+        }
+    }
+    queue.push(new Item(fun, args));
+    if (queue.length === 1 && !draining) {
+        runTimeout(drainQueue);
+    }
+};
+
+// v8 likes predictible objects
+function Item(fun, array) {
+    this.fun = fun;
+    this.array = array;
+}
+Item.prototype.run = function () {
+    this.fun.apply(null, this.array);
+};
+process.title = 'browser';
+process.browser = true;
+process.env = {};
+process.argv = [];
+process.version = ''; // empty string to avoid regexp issues
+process.versions = {};
+
+function noop() {}
+
+process.on = noop;
+process.addListener = noop;
+process.once = noop;
+process.off = noop;
+process.removeListener = noop;
+process.removeAllListeners = noop;
+process.emit = noop;
+process.prependListener = noop;
+process.prependOnceListener = noop;
+
+process.listeners = function (name) { return [] }
+
+process.binding = function (name) {
+    throw new Error('process.binding is not supported');
+};
+
+process.cwd = function () { return '/' };
+process.chdir = function (dir) {
+    throw new Error('process.chdir is not supported');
+};
+process.umask = function() { return 0; };
+
+},{}]},{},[2]);
diff --git a/ole.js b/ole.js
deleted file mode 100644
index 1b13e30..0000000
--- a/ole.js
+++ /dev/null
@@ -1,189 +0,0 @@
-/*
-
-altium.js OLE parser
-
-Copyright (c) 2022 Graham Sutherland
-
-Permission is hereby granted, free of charge, to any person obtaining
-a copy of this software and associated documentation files (the
-"Software"), to deal in the Software without restriction, including
-without limitation the rights to use, copy, modify, merge, publish,
-distribute, sublicense, and/or sell copies of the Software, and to
-permit persons to whom the Software is furnished to do so, subject to
-the following conditions:
-
-The above copyright notice and this permission notice shall be
-included in all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-*/
-
-
-class OLE
-{
-	static get ExpectedMagicNumber() { return new Uint8Array([ 0xD0, 0xCF, 0x11, 0xE0, 0xA1, 0xB1, 0x1A, 0xE1 ]) }
-	static get ExpectedMajorVersion() { return 0x0003; }
-	static get ExpectedMinorVersion() { return 0x003E; }
-	static get ExpectedByteOrder() { return 0xFFFE; }
-	static get ExpectedSectorShift() { return 0x0009; }
-	static get ExpectedMiniSectorShift() { return 0x0006; }
-	static get ExpectedNumberOfDirectorySectors() { return 0; }
-	
-	constructor(fileData)
-	{
-		this.stream = new U8Stream(fileData);
-		
-		if (fileData.length < 76)
-		{
-			throw new Error("File is too small to be a valid OLE compound document.");
-		}
-		
-		this.header = {};
-		
-		this.header.signature = this.stream.read(8);
-		if (!this.header.signature.compare_to(OLE.ExpectedMagicNumber))
-		{
-			throw new Error("File does not start with the correct OLE header signature.");
-		}
-		
-		this.header.clsid = this.stream.read(16);
-		if (!this.header.clsid.every((b) => b === 0))
-		{
-			console.warn("OLE header CLSID was not set to all zeroes.");
-		}
-		
-		this.header.minor_version = this.stream.read_u16_le();
-		this.header.major_version = this.stream.read_u16_le();
-		if (this.header.major_version != OLE.ExpectedMajorVersion || this.header.minor_version != OLE.ExpectedMinorVersion)
-		{
-			throw new Error("OLE header does not have expected OLE version number.");
-		}
-		
-		this.header.byte_order = this.stream.read_u16_le();
-		if (this.header.byte_order != OLE.ExpectedByteOrder)
-		{
-			throw new Error("OLE header does not have expected byte order value.");
-		}
-		
-		this.header.sector_shift = this.stream.read_u16_le();
-		if (this.header.sector_shift != OLE.ExpectedSectorShift)
-		{
-			throw new Error("OLE header does not have expected sector shift value.");
-		}
-		this.header.sector_size = 1 << this.header.sector_shift;
-		
-		this.header.mini_sector_shift = this.stream.read_u16_le();
-		if (this.header.mini_sector_shift != OLE.ExpectedMiniSectorShift)
-		{
-			throw new Error("OLE header does not have expected mini sector shift value.");
-		}
-		this.header.mini_sector_size = 1 << this.header.mini_sector_shift;
-		
-		if (!this.stream.read(6).every((b) => b === 0))
-		{
-			console.warn("OLE header reserved field was not set to all zeroes.");
-		}
-		
-		// directory sectors are unsupported for V3
-		this.header.directory_sector_count = this.stream.read_u32_le();
-		if (this.header.directory_sector_count != OLE.ExpectedNumberOfDirectorySectors)
-		{
-			throw new Error("OLE header does not have expected number of directory sectors.");
-		}
-		
-		this.header.fat_sector_count = this.stream.read_u32_le();
-		this.header.first_directory_sector_location = this.stream.read_u32_le();
-		this.header.transaction_signature_number = this.stream.read_u32_le();
-		this.header.mini_stream_cutoff_size = this.stream.read_u32_le();
-		this.header.fist_mini_fat_sector_location = this.stream.read_u32_le();
-		this.header.number_of_mini_fat_sectors = this.stream.read_u32_le();
-		this.header.first_difat_sector_location = this.stream.read_u32_le();
-		this.header.number_of_difat_sectors = this.stream.read_u32_le();
-		
-		this.header.difat = new Uint32Array(this.stream.read(436, true));
-		this.fat_sectors = [];
-		for (let i = 0; i < 109; i++)
-		{
-			this.fat_sectors[i] = new FATSector(this, this.header.difat[i]);
-		}
-		this.directory_entries = [];
-		this.directory_entries[0] = new DirectoryEntry(this, (this.header.first_directory_sector_location + 1) * this.header.sector_size);
-		this.directory_entries[1] = new DirectoryEntry(this, (this.header.first_directory_sector_location + 1) * this.header.sector_size + 128);
-		this.directory_entries[2] = new DirectoryEntry(this, (this.header.first_directory_sector_location + 1) * this.header.sector_size + 256);
-		this.directory_entries[3] = new DirectoryEntry(this, (this.header.first_directory_sector_location + 1) * this.header.sector_size + 384);
-		
-	}
-}
-
-class FATSector
-{
-	constructor(ole, sector_location)
-	{
-		this.ole = ole;
-		this.sector_location = sector_location;
-		const typeMap = [
-			{ value: 0xFFFFFFFC, name: "DIFSECT" },
-			{ value: 0xFFFFFFFD, name: "FATSECT" },
-			{ value: 0xFFFFFFFE, name: "ENDOFCHAIN" },
-			{ value: 0xFFFFFFFF, name: "FREESECT" },
-		];
-		if (this.sector_location >= 0xFFFFFFC)
-		{
-			this.entries = [];
-			this.type = typeMap.find(tm => tm.value == this.sector_location).name;
-		}
-		else
-		{
-			this.type = "FAT";
-			ole.stream.seek_to((this.sector_location + 1) * ole.header.sector_size);
-			this.entries = new Uint32Array(ole.stream.read(ole.header.sector_size - 4, true));
-			this.next_difat_sector = ole.stream.read_u32_le();
-		}
-	}
-}
-
-class DirectoryEntry
-{
-	constructor(ole, position)
-	{
-		this.ole = ole;
-		this.position = position;
-		ole.stream.seek_to(position);
-		
-		let name_bytes = ole.stream.read(64);
-		let name_len = ole.stream.read_u16_le();
-		if (name_len > 64)
-		{
-			throw new Error("Name length field exceeded maximum size of 64.");
-		}
-		this.name_field_length = name_len;
-		this.name = new TextDecoder("utf-16").decode(name_bytes.slice(0, name_len));
-		if (this.name.endsWith("\u0000"))
-			this.name = this.name.slice(0, this.name.indexOf("\u0000"));
-		
-		this.object_type = ole.stream.read_u8();
-		this.colour_flag = ole.stream.read_u8();
-		this.left_sibling = ole.stream.read_u32_le();
-		this.right_sibling = ole.stream.read_u32_le();
-		this.child_id = ole.stream.read_u32_le();
-		this.clsid = ole.stream.read(16);
-		this.state_bits = ole.stream.read_u32_le();
-		this.creation_time = ole.stream.read_u64_le();
-		this.modified_time = ole.stream.read_u64_le();
-		this.starting_sector_location = ole.stream.read_u32_le();
-		this.stream_size = ole.stream.read_u64_le();
-	}
-	
-	read_all()
-	{
-		this.ole.stream.seek_to((this.starting_sector_location + 1) * this.ole.header.sector_size);
-		return new U8Stream(this.ole.stream.read(Number(this.stream_size)));
-	}
-}
\ No newline at end of file
