From 1a428c8f5b158fbf1358bf93e26c7dc874fcb547 Mon Sep 17 00:00:00 2001
From: SheetJS <dev@sheetjs.com>
Date: Thu, 23 Feb 2017 21:11:45 -0800
Subject: [PATCH] version bump 0.10.3: ignore bad FAT

- sector checked before reading (h/t @e12009)
  See https://github.com/SheetJS/js-xlsx/issues/569
- flow type checking
---
 .flowconfig             |  35 +++
 .travis.yml             |   7 +-
 LICENSE                 |   2 +-
 Makefile                | 123 ++++++-----
 README.md               |  37 ++--
 bin/cfb.njs             |   6 +-
 bits/00_header.js       |   2 +-
 bits/08_blob.js         |  18 +-
 bits/10_types.js        |  10 +
 bits/31_version.js      |   2 +-
 bits/40_parse.js        |   6 +-
 bits/44_findpath.js     |   2 +-
 bits/45_readfat.js      |   5 +-
 bits/46_readdir.js      |   4 +-
 bits/49_readutils.js    |   4 +-
 cfb.flow.js             | 476 ++++++++++++++++++++++++++++++++++++++++
 cfb.js                  |  13 +-
 dist/LICENSE            |   2 +-
 dist/cfb.js             |  13 +-
 dist/cfb.min.js         |   4 +-
 dist/cfb.min.map        |   2 +-
 dist/xlscfb.js          |  11 +-
 fails.lst               |   3 +
 index.html              |  47 +++-
 misc/flow.js            |   5 +
 misc/flowdeps.js        |   9 +
 misc/help.sh            |  42 ++++
 misc/spin.sh            |   2 +-
 misc/suppress_export.js |  14 ++
 package.json            |   5 +-
 xlscfb.flow.js          | 410 ++++++++++++++++++++++++++++++++++
 xlscfb.js               |  11 +-
 32 files changed, 1212 insertions(+), 120 deletions(-)
 create mode 100644 .flowconfig
 create mode 100644 bits/10_types.js
 create mode 100644 cfb.flow.js
 create mode 100644 misc/flow.js
 create mode 100644 misc/flowdeps.js
 create mode 100755 misc/help.sh
 create mode 100644 xlscfb.flow.js

diff --git a/.flowconfig b/.flowconfig
new file mode 100644
index 0000000..99333f7
--- /dev/null
+++ b/.flowconfig
@@ -0,0 +1,35 @@
+[ignore]
+.*/node_modules/.*
+.*/dist/.*
+.*/test.js
+
+.*/bits/.*
+.*/ctest/.*
+.*/misc/.*
+.*/perf/.*
+
+.*/demo/browser.js
+.*/shim.js
+
+.*/odsbits/.*
+.*/xlscfb.js
+.*/cfb.js
+.*/jszip.js
+.*/tests/.*
+.*/demos/.*
+
+[include]
+cfb.flow.js
+xlscfb.flow.js
+.*/bin/.*.njs
+
+[libs]
+bits/10_types.js
+misc/flow.js
+misc/flowdeps.js
+
+[options]
+module.file_ext=.js
+module.file_ext=.njs
+module.ignore_non_literal_requires=true
+suppress_comment= \\(.\\|\n\\)*\\$FlowIgnore
diff --git a/.travis.yml b/.travis.yml
index ed1b3d7..2425423 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,9 +1,14 @@
 language: node_js
 node_js:
-  - "0.11"
+  - "7"
+  - "6"
+  - "5"
+  - "4"
+  - "0.12"
   - "0.10"
   - "0.8"
 before_install:
+  - "npm install -g npm@next"
   - "npm install -g mocha"
   - "npm install blanket"
   - "npm install xlsjs"
diff --git a/LICENSE b/LICENSE
index 6d41660..a5fc80a 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright (C) 2013-2014   SheetJS
+Copyright (C) 2013-present  SheetJS
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
diff --git a/Makefile b/Makefile
index 1fa6e4f..57dc6f8 100644
--- a/Makefile
+++ b/Makefile
@@ -1,84 +1,58 @@
+SHELL=/bin/bash
 LIB=cfb
 FMT=xls doc ppt misc full
 REQS=
 ADDONS=
 AUXTARGETS=xlscfb.js
+CMDS=bin/cfb.njs
+HTMLLINT=index.html
 
 ULIB=$(shell echo $(LIB) | tr a-z A-Z)
 DEPS=$(sort $(wildcard bits/*.js))
 TARGET=$(LIB).js
+FLOWTARGET=$(LIB).flow.js
+FLOWTGTS=$(TARGET) $(AUXTARGETS)
+
+## Main Targets
 
 .PHONY: all
-all: $(TARGET) $(AUXTARGETS)
+all: $(TARGET) $(AUXTARGETS) ## Build library and auxiliary scripts
 
-$(TARGET): $(DEPS)
+$(FLOWTGTS): %.js : %.flow.js
+	node -e 'process.stdout.write(require("fs").readFileSync("$<","utf8").replace(/^[ \t]*\/\*[:#][^*]*\*\/\s*(\n)?/gm,"").replace(/\/\*[:#][^*]*\*\//gm,""))' > $@
+
+$(FLOWTARGET): $(DEPS)
 	cat $^ | tr -d '\15\32' > $@
 
 bits/31_version.js: package.json
 	echo "exports.version = '"`grep version package.json | awk '{gsub(/[^0-9a-z\.-]/,"",$$2); print $$2}'`"';" > $@
 
 .PHONY: clean
-clean:
-	rm -f $(TARGET)
+clean: ## Remove targets and build artifacts
+	rm -f $(TARGET) $(FLOWTARGET)
 
 .PHONY: clean-data
 clean-data:
 	rm -fr ./test_files/ ./test_files_pres/
 
 .PHONY: init
-init:
+init: ## Initial setup for development
 	if [ ! -e test_files ]; then git clone https://github.com/SheetJS/test_files; fi
 	cd test_files; git pull; make
 	if [ ! -e test_files_pres ]; then git clone https://github.com/SheetJS/test_files_pres; fi
 	cd test_files_pres; git pull
 
-.PHONY: test mocha
-test mocha: test.js
-	mocha -R spec -t 20000
-
-.PHONY: prof
-prof:
-	cat misc/prof.js test.js > prof.js
-	node --prof prof.js
-
-TESTFMT=$(patsubst %,test_%,$(FMT))
-.PHONY: $(TESTFMT)
-$(TESTFMT): test_%:
-	FMTS=$* make test
-
-
-.PHONY: lint
-lint: $(TARGET)
-	jshint --show-non-errors $(TARGET) $(AUXTARGETS)
-	jscs $(TARGET) $(AUXTARGETS)
-
-.PHONY: cov cov-spin
-cov: misc/coverage.html
-cov-spin:
-	make cov & bash misc/spin.sh $$!
-
-COVFMT=$(patsubst %,cov_%,$(FMT))
-.PHONY: $(COVFMT)
-$(COVFMT): cov_%:
-	FMTS=$* make cov
-
-misc/coverage.html: $(TARGET) test.js
-	mocha --require blanket -R html-cov > $@
-
-.PHONY: coveralls coveralls-spin
-coveralls:
-	mocha --require blanket --reporter mocha-lcov-reporter | ./node_modules/coveralls/bin/coveralls.js
-
-coveralls-spin:
-	make coveralls & bash misc/spin.sh $$!
-
 .PHONY: dist
-dist: dist-deps $(TARGET)
+dist: dist-deps $(TARGET) ## Prepare JS files for distribution
 	cp $(TARGET) dist/
 	cp LICENSE dist/
 	uglifyjs $(TARGET) -o dist/$(LIB).min.js --source-map dist/$(LIB).min.map --preamble "$$(head -n 1 bits/00_header.js)"
 	misc/strip_sourcemap.sh dist/$(LIB).min.js
 
+.PHONY: dist-deps
+dist-deps: xlscfb.js ## Copy dependencies for distribution
+	cp xlscfb.js dist/xlscfb.js
+
 .PHONY: aux
 aux: $(AUXTARGETS)
 
@@ -86,9 +60,58 @@ aux: $(AUXTARGETS)
 xls: xlscfb.js
 
 XLSDEPS=misc/suppress_export.js $(filter-out bits/08_blob.js,$(DEPS))
-xlscfb.js: $(XLSDEPS)
+xlscfb.flow.js: $(XLSDEPS) ## Build support library
 	cat $^ | tr -d '\15\32' > $@
 
-.PHONY: dist-deps
-dist-deps: xlscfb.js
-	cp xlscfb.js dist/xlscfb.js
+
+## Testing
+
+.PHONY: test mocha
+test mocha: test.js $(TARGET) ## Run test suite
+	mocha -R spec -t 20000
+
+#*                      To run tests for one format, make test_<fmt>
+TESTFMT=$(patsubst %,test_%,$(FMT))
+.PHONY: $(TESTFMT)
+$(TESTFMT): test_%:
+	FMTS=$* make test
+
+
+## Code Checking
+
+.PHONY: lint
+lint: $(TARGET) $(AUXTARGETS) ## Run jshint and jscs checks
+	@jshint --show-non-errors $(TARGET) $(AUXTARGETS)
+	@jshint --show-non-errors $(CMDS)
+	@jshint --show-non-errors package.json
+	@jshint --show-non-errors --extract=always $(HTMLLINT)
+	@jscs $(TARGET) $(AUXTARGETS)
+
+.PHONY: flow
+flow: lint ## Run flow checker
+	@flow check --all --show-all-errors
+
+.PHONY: cov
+cov: misc/coverage.html ## Run coverage test
+
+#*                      To run coverage tests for one format, make cov_<fmt>
+COVFMT=$(patsubst %,cov_%,$(FMT))
+.PHONY: $(COVFMT)
+$(COVFMT): cov_%:
+	FMTS=$* make cov
+
+misc/coverage.html: $(TARGET) test.js
+	mocha --require blanket -R html-cov -t 20000 > $@
+
+.PHONY: coveralls
+coveralls: ## Coverage Test + Send to coveralls.io
+	mocha --require blanket --reporter mocha-lcov-reporter -t 20000 | node ./node_modules/coveralls/bin/coveralls.js
+
+
+.PHONY: help
+help:
+	@grep -hE '(^[a-zA-Z_-][ a-zA-Z_-]*:.*?|^#[#*])' $(MAKEFILE_LIST) | bash misc/help.sh
+
+#* To show a spinner, append "-spin" to any target e.g. cov-spin
+%-spin:
+	@make $* & bash misc/spin.sh $$!
diff --git a/README.md b/README.md
index c2fcb31..cd7c423 100644
--- a/README.md
+++ b/README.md
@@ -1,37 +1,41 @@
 # Compound File Binary Format
 
 This is a Pure-JS implementation of MS-CFB: Compound File Binary File Format, a
-format used in many Microsoft file types (such as XLS, DOC, and other Microsoft
-Office file types).
+format used in many Microsoft file types (such as XLS and DOC)
 
 # Utility Installation and Usage
 
 The package is available on NPM:
 
-```
+```bash
 $ npm install -g cfb
 $ cfb path/to/CFB/file
 ```
 
 The command will extract the storages and streams in the container, generating
-files that line up with the tree-based structure of the storage.  Metadata
-such as the red-black tree are discarded (and in the future, new CFB containers
-will exclusively use black nodes)
+files that line up with the tree-based structure of the storage.  Metadata such
+as the red-black tree are discarded.
 
 # Library Installation and Usage
 
 In the browser:
 
-    <script src="cfb.js" type="text/javascript"></script>
+```html
+<script src="cfb.js" type="text/javascript"></script>
+```
 
 In node:
 
-    var CFB = require('cfb');
+```js
+var CFB = require('cfb');
+```
 
 For example, to get the Workbook content from an XLS file:
 
-    var cfb = CFB.read(filename, {type: 'file'});
-    var workbook = cfb.find('Workbook')
+```js
+var cfb = CFB.read(filename, {type: 'file'});
+var workbook = cfb.find('Workbook')
+```
 
 # API
 
@@ -86,7 +90,7 @@ Case comparison has not been verified for non-ASCII characters
 
 Writing is not supported.  It is in the works, but it has not yet been released.
 
-The `xlscfb.js` file is designed to be embedded in [js-xls](http://git.io/xls)
+The `xlscfb.js` file is designed to be embedded in [js-xlsx](http://git.io/xlsx)
 
 # License
 
@@ -95,7 +99,14 @@ This implementation is covered under Apache 2.0 license.  It complies with the
 
 [![Build Status](https://travis-ci.org/SheetJS/js-cfb.svg?branch=master)](https://travis-ci.org/SheetJS/js-cfb)
 
-[![Coverage Status](https://coveralls.io/repos/SheetJS/js-cfb/badge.png?branch=master)](https://coveralls.io/r/SheetJS/js-cfb?branch=master)
+[![Coverage Status](http://img.shields.io/coveralls/SheetJS/js-cfb/master.svg)](https://coveralls.io/r/SheetJS/js-cfb?branch=master)
+
+[![Analytics](https://ga-beacon.appspot.com/UA-36810333-1/SheetJS/js-cfb?pixel)](https://github.com/SheetJS/js-cfb)
+
+[![NPM Downloads](https://img.shields.io/npm/dt/cfb.svg)](https://npmjs.org/package/cfb)
+
+[![Dependencies Status](https://david-dm.org/sheetjs/js-cfb/status.svg)](https://david-dm.org/sheetjs/js-cfb)
+
+[![ghit.me](https://ghit.me/badge.svg?repo=sheetjs/js-cfb)](https://ghit.me/repo/sheetjs/js-cfb)
 
-[![githalytics.com alpha](https://cruel-carlota.pagodabox.com/88c2e1fd637653cd780b3c6d3dcd70ad "githalytics.com")](http://githalytics.com/SheetJS/js-cfb)
 
diff --git a/bin/cfb.njs b/bin/cfb.njs
index 8b18dcd..5c5ac01 100755
--- a/bin/cfb.njs
+++ b/bin/cfb.njs
@@ -15,14 +15,14 @@ if(program.args.length === 0 || !fs.existsSync(program.args[0])) {
 	process.exit(1);
 }
 
-var opts = {type:'file'};
+var opts = ({type:'file'}/*:any*/);
 if(program.dev) opts.WTF = true;
 
 var cfb = CFB.read(program.args[0], opts);
 if(program.dump) {
-	console.log("Full Paths:")
+	console.log("Full Paths:");
 	console.log(cfb.FullPaths.map(function(x) { return "  " + x; }).join("\n"));
-	console.log("Full Path Directory:")
+	console.log("Full Path Directory:");
 	console.log(cfb.FullPathDir);
 }
 if(!program.quiet && !program.dump) for(var i=0; i!=cfb.FullPaths.length; ++i) {
diff --git a/bits/00_header.js b/bits/00_header.js
index 076f3cd..e6f26f7 100644
--- a/bits/00_header.js
+++ b/bits/00_header.js
@@ -1,4 +1,4 @@
-/* cfb.js (C) 2013-2014 SheetJS -- http://sheetjs.com */
+/* cfb.js (C) 2013-present SheetJS -- http://sheetjs.com */
 /* vim: set ts=2: */
 /*jshint eqnull:true */
 
diff --git a/bits/08_blob.js b/bits/08_blob.js
index a3523b6..6bf3c06 100644
--- a/bits/08_blob.js
+++ b/bits/08_blob.js
@@ -28,14 +28,14 @@ var Base64 = (function(){
 var chr0 = /\u0000/g, chr1 = /[\u0001-\u0006]/;
 
 var s2a, _s2a;
-s2a = _s2a = function _s2a(s) { return s.split("").map(function(x){ return x.charCodeAt(0) & 0xff; }); };
+s2a = _s2a = function _s2a(s/*:string*/) { return s.split("").map(function(x){ return x.charCodeAt(0) & 0xff; }); };
 var __toBuffer, ___toBuffer;
-__toBuffer = ___toBuffer = function(bufs) { var x = []; for(var i = 0; i < bufs[0].length; ++i) { x.push.apply(x, bufs[0][i]); } return x; };
+__toBuffer = ___toBuffer = function(bufs/*:any*/) { var x = []; for(var i = 0; i < bufs[0].length; ++i) { x.push.apply(x, bufs[0][i]); } return x; };
 var __utf16le, ___utf16le;
 __utf16le = ___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,'').replace(chr1,'!'); };
 var __hexlify, ___hexlify;
 __hexlify = ___hexlify = function(b,s,l) { return b.slice(s,(s+l)).map(function(x){return (x<16?"0":"") + x.toString(16);}).join(""); };
-var bconcat = function(bufs) { return [].concat.apply([], bufs); };
+var bconcat = function(bufs/*:any*/) { return [].concat.apply([], bufs); };
 
 
 if(typeof Buffer !== "undefined") {
@@ -44,9 +44,9 @@ if(typeof Buffer !== "undefined") {
 		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(s, "binary"); };
-	bconcat = function(bufs) { return Buffer.isBuffer(bufs[0]) ? Buffer.concat(bufs) : [].concat.apply([], bufs); };
+	__toBuffer = function(bufs/*:any*/) { return (bufs[0].length > 0 && Buffer.isBuffer(bufs[0][0])) ? Buffer.concat(bufs[0]) : ___toBuffer(bufs);};
+	s2a = function(s/*:string*/) { return new Buffer(s, "binary"); };
+	bconcat = function(bufs/*:any*/) { return Buffer.isBuffer(bufs[0]) ? Buffer.concat(bufs) : [].concat.apply([], bufs); };
 }
 
 
@@ -56,7 +56,7 @@ var __readInt16LE = function(b, idx) { var u = b[idx+1]*(1<<8)+b[idx]; return (u
 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) {
+function ReadShift(size/*:number*/, t/*:?any*/) {
 	var oI, oS, type = 0;
 	switch(size) {
 		case 1: oI = __readUInt8(this, this.l); break;
@@ -67,13 +67,13 @@ function ReadShift(size, t) {
 	this.l+=size; if(type === 0) return oI; return oS;
 }
 
-function CheckField(hexstr, fld) {
+function CheckField(hexstr/*:string*/, fld/*:string*/) {
 	var m = __hexlify(this,this.l,hexstr.length>>1);
 	if(m !== hexstr) throw fld + 'Expected ' + hexstr + ' saw ' + m;
 	this.l += hexstr.length>>1;
 }
 
-function prep_blob(blob, pos) {
+function prep_blob(blob/*:any*/, pos/*:number*/) {
 	blob.l = pos;
 	blob.read_shift = ReadShift;
 	blob.chk = CheckField;
diff --git a/bits/10_types.js b/bits/10_types.js
new file mode 100644
index 0000000..a7cc6ae
--- /dev/null
+++ b/bits/10_types.js
@@ -0,0 +1,10 @@
+/*::
+declare var DO_NOT_EXPORT_CFB:any;
+type SectorEntry = any;
+type SectorList = {
+	(k:string|number):SectorEntry;
+	name:?string;
+	fat_addrs:any;
+	ssz:number;
+}
+*/
diff --git a/bits/31_version.js b/bits/31_version.js
index 172c898..e1a6e44 100644
--- a/bits/31_version.js
+++ b/bits/31_version.js
@@ -1 +1 @@
-exports.version = '0.10.2';
+exports.version = '0.10.3';
diff --git a/bits/40_parse.js b/bits/40_parse.js
index a8dad2e..2b0d9fe 100644
--- a/bits/40_parse.js
+++ b/bits/40_parse.js
@@ -10,7 +10,7 @@ var difat_start = 0; // first mini FAT sector location
 var fat_addrs = []; // locations of FAT sectors
 
 /* [MS-CFB] 2.2 Compound File Header */
-var blob = file.slice(0,512);
+var blob/*:any*/ = file.slice(0,512);
 prep_blob(blob, 0);
 
 /* major version */
@@ -70,7 +70,7 @@ var sectors = sectorify(file, ssz);
 sleuth_fat(difat_start, ndfs, sectors, ssz, fat_addrs);
 
 /** Chains */
-var sector_list = make_sector_list(sectors, dir_start, fat_addrs, ssz);
+var sector_list/*:SectorList*/ = 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";
@@ -79,7 +79,7 @@ sector_list.fat_addrs = fat_addrs;
 sector_list.ssz = ssz;
 
 /* [MS-CFB] 2.6.1 Compound File Directory Entry */
-var files = {}, Paths = [], FileIndex = [], FullPaths = [], FullPathDir = {};
+var files = {}, Paths/*:any*/ = [], FileIndex = [], FullPaths = [], FullPathDir = {};
 read_directory(dir_start, sector_list, sectors, Paths, nmfs, files, FileIndex);
 
 build_full_paths(FileIndex, FullPathDir, FullPaths, Paths);
diff --git a/bits/44_findpath.js b/bits/44_findpath.js
index 596279a..4d1c856 100644
--- a/bits/44_findpath.js
+++ b/bits/44_findpath.js
@@ -4,7 +4,7 @@ function make_find_path(FullPaths, Paths, FileIndex, files, root_name) {
 	var UCPaths = new Array(Paths.length), i;
 	for(i = 0; i < FullPaths.length; ++i) UCFullPaths[i] = FullPaths[i].toUpperCase().replace(chr0,'').replace(chr1,'!');
 	for(i = 0; i < Paths.length; ++i) UCPaths[i] = Paths[i].toUpperCase().replace(chr0,'').replace(chr1,'!');
-	return function find_path(path) {
+	return function find_path(path/*:string*/) {
 		var k;
 		if(path.charCodeAt(0) === 47 /* "/" */) { k=true; path = root_name + path; }
 		else k = path.indexOf("/") !== -1;
diff --git a/bits/45_readfat.js b/bits/45_readfat.js
index 59bca6d..37aead4 100644
--- a/bits/45_readfat.js
+++ b/bits/45_readfat.js
@@ -6,6 +6,7 @@ function sleuth_fat(idx, cnt, sectors, ssz, fat_addrs) {
 		if(cnt !== 0) throw "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);
@@ -29,13 +30,14 @@ function get_sector_list(sectors, start, fat_addrs, ssz, chkd) {
 		var addr = fat_addrs[Math.floor(j*4/ssz)];
 		jj = ((j*4) & modulus);
 		if(ssz < 4 + jj) throw "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) {
+function make_sector_list(sectors, dir_start, fat_addrs, ssz/*:number*/)/*:any*/ {
 	var sl = sectors.length, sector_list = new Array(sl);
 	var chkd = new Array(sl), buf, buf_chain;
 	var modulus = ssz - 1, i, j, k, jj;
@@ -51,6 +53,7 @@ function make_sector_list(sectors, dir_start, fat_addrs, ssz) {
 			var addr = fat_addrs[Math.floor(j*4/ssz)];
 			jj = ((j*4) & modulus);
 			if(ssz < 4 + jj) throw "FAT boundary crossed: " + j + " 4 "+ssz;
+			if(!sectors[addr]) break;
 			j = __readInt32LE(sectors[addr], jj);
 		}
 		sector_list[k] = {nodes: buf, data:__toBuffer([buf_chain])};
diff --git a/bits/46_readdir.js b/bits/46_readdir.js
index d30a99c..748d056 100644
--- a/bits/46_readdir.js
+++ b/bits/46_readdir.js
@@ -11,7 +11,7 @@ function read_directory(dir_start, sector_list, sectors, Paths, nmfs, files, Fil
 		if(namelen === 0) continue;
 		name = __utf16le(blob,0,namelen-pl);
 		Paths.push(name);
-		o = {
+		o = ({
 			name:  name,
 			type:  blob.read_shift(1),
 			color: blob.read_shift(1),
@@ -20,7 +20,7 @@ function read_directory(dir_start, sector_list, sectors, Paths, nmfs, files, Fil
 			C:     blob.read_shift(4, 'i'),
 			clsid: blob.read_shift(16),
 			state: blob.read_shift(4, 'i')
-		};
+		}/*:any*/);
 		ctime = blob.read_shift(2) + blob.read_shift(2) + blob.read_shift(2) + blob.read_shift(2);
 		if(ctime !== 0) {
 			o.ctime = ctime; o.ct = read_date(blob, blob.l-8);
diff --git a/bits/49_readutils.js b/bits/49_readutils.js
index 771bf59..c942f95 100644
--- a/bits/49_readutils.js
+++ b/bits/49_readutils.js
@@ -1,10 +1,10 @@
 var fs;
-function readFileSync(filename, options) {
+function readFileSync(filename/*:string*/, options/*:any*/) {
 	if(fs === undefined) fs = require('fs');
 	return parse(fs.readFileSync(filename), options);
 }
 
-function readSync(blob, options) {
+function readSync(blob/*:any*/, options/*:any*/) {
 	switch(options !== undefined && options.type !== undefined ? options.type : "base64") {
 		case "file": return readFileSync(blob, options);
 		case "base64": return parse(s2a(Base64.decode(blob)), options);
diff --git a/cfb.flow.js b/cfb.flow.js
new file mode 100644
index 0000000..8e2d45c
--- /dev/null
+++ b/cfb.flow.js
@@ -0,0 +1,476 @@
+/* cfb.js (C) 2013-present SheetJS -- http://sheetjs.com */
+/* vim: set ts=2: */
+/*jshint eqnull:true */
+
+var Base64 = (function(){
+	var map = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
+	return {
+		decode: function(input) {
+			var o = "";
+			var c1, c2, c3;
+			var e1, e2, e3, e4;
+			input = input.replace(/[^\w\+\/\=]/g, "");
+			for(var i = 0; i < input.length;) {
+				e1 = map.indexOf(input.charAt(i++));
+				e2 = map.indexOf(input.charAt(i++));
+				c1 = (e1 << 2) | (e2 >> 4);
+				o += String.fromCharCode(c1);
+
+				e3 = map.indexOf(input.charAt(i++));
+				c2 = ((e2 & 15) << 4) | (e3 >> 2);
+				if (e3 !== 64) { o += String.fromCharCode(c2); }
+
+				e4 = map.indexOf(input.charAt(i++));
+				c3 = ((e3 & 3) << 6) | e4;
+				if (e4 !== 64) { o += String.fromCharCode(c3); }
+			}
+			return o;
+		}
+	};
+})();
+
+var chr0 = /\u0000/g, chr1 = /[\u0001-\u0006]/;
+
+var s2a, _s2a;
+s2a = _s2a = function _s2a(s/*:string*/) { return s.split("").map(function(x){ return x.charCodeAt(0) & 0xff; }); };
+var __toBuffer, ___toBuffer;
+__toBuffer = ___toBuffer = function(bufs/*:any*/) { var x = []; for(var i = 0; i < bufs[0].length; ++i) { x.push.apply(x, bufs[0][i]); } return x; };
+var __utf16le, ___utf16le;
+__utf16le = ___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,'').replace(chr1,'!'); };
+var __hexlify, ___hexlify;
+__hexlify = ___hexlify = function(b,s,l) { return b.slice(s,(s+l)).map(function(x){return (x<16?"0":"") + x.toString(16);}).join(""); };
+var bconcat = function(bufs/*:any*/) { return [].concat.apply([], bufs); };
+
+
+if(typeof Buffer !== "undefined") {
+	__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/*:any*/) { return (bufs[0].length > 0 && Buffer.isBuffer(bufs[0][0])) ? Buffer.concat(bufs[0]) : ___toBuffer(bufs);};
+	s2a = function(s/*:string*/) { return new Buffer(s, "binary"); };
+	bconcat = function(bufs/*:any*/) { return Buffer.isBuffer(bufs[0]) ? Buffer.concat(bufs) : [].concat.apply([], 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/*:number*/, t/*:?any*/) {
+	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;
+}
+
+function CheckField(hexstr/*:string*/, fld/*:string*/) {
+	var m = __hexlify(this,this.l,hexstr.length>>1);
+	if(m !== hexstr) throw fld + 'Expected ' + hexstr + ' saw ' + m;
+	this.l += hexstr.length>>1;
+}
+
+function prep_blob(blob/*:any*/, pos/*:number*/) {
+	blob.l = pos;
+	blob.read_shift = ReadShift;
+	blob.chk = CheckField;
+}
+
+/*::
+declare var DO_NOT_EXPORT_CFB:any;
+type SectorEntry = any;
+type SectorList = {
+	(k:string|number):SectorEntry;
+	name:?string;
+	fat_addrs:any;
+	ssz:number;
+}
+*/
+/* [MS-CFB] v20130118 */
+var CFB = (function _CFB(){
+var exports = {};
+exports.version = '0.10.3';
+function parse(file) {
+var mver = 3; // major version
+var ssz = 512; // sector size
+var nmfs = 0; // number of mini FAT sectors
+var ndfs = 0; // number of DIFAT sectors
+var dir_start = 0; // first directory sector location
+var minifat_start = 0; // first mini FAT sector location
+var difat_start = 0; // first mini FAT sector location
+
+var fat_addrs = []; // locations of FAT sectors
+
+/* [MS-CFB] 2.2 Compound File Header */
+var blob/*:any*/ = 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;
+	default: throw "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 nds = blob.read_shift(4, 'i');
+if(mver === 3 && nds !== 0) throw '# Directory Sectors: Expected 0 saw ' + nds;
+
+// Number of FAT Sectors
+//var nfs = blob.read_shift(4, 'i');
+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
+ndfs = blob.read_shift(4, 'i');
+
+// Grab FAT Sector Locations
+for(var q, 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, ndfs, sectors, ssz, fat_addrs);
+
+/** Chains */
+var sector_list/*:SectorList*/ = 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/*:any*/ = [], FileIndex = [], FullPaths = [], FullPathDir = {};
+read_directory(dir_start, sector_list, sectors, Paths, nmfs, files, FileIndex);
+
+build_full_paths(FileIndex, FullPathDir, FullPaths, Paths);
+
+var root_name = Paths.shift();
+Paths.root = root_name;
+
+/* [MS-CFB] 2.6.4 (Unicode 3.0.1 case conversion) */
+var find_path = make_find_path(FullPaths, Paths, FileIndex, files, root_name);
+
+return {
+	raw: {header: header, sectors: sectors},
+	FileIndex: FileIndex,
+	FullPaths: FullPaths,
+	FullPathDir: FullPathDir,
+	find: find_path
+};
+} // parse
+
+/* [MS-CFB] 2.2 Compound File Header -- read up to major version */
+function check_get_mver(blob) {
+	// header signature 8
+	blob.chk(HEADER_SIGNATURE, 'Header Signature: ');
+
+	// clsid 16
+	blob.chk(HEADER_CLSID, 'CLSID: ');
+
+	// 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: ');
+
+	// Sector Shift
+	switch((shift = blob.read_shift(2))) {
+		case 0x09: if(mver !== 3) throw 'MajorVersion/SectorShift Mismatch'; break;
+		case 0x0c: if(mver !== 4) throw 'MajorVersion/SectorShift Mismatch'; break;
+		default: throw '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 = new Array(nsectors);
+	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, FPD, FP, Paths) {
+	var i = 0, L = 0, R = 0, C = 0, j = 0, pl = Paths.length;
+	var dad = new Array(pl), q = new Array(pl);
+
+	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) { dad[L] = dad[i]; q.push(L); }
+		if(R !== -1) { dad[R] = dad[i]; 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 = dad[i];
+		if(j === 0) FP[i] = FP[0] + "/" + FP[i];
+		else while(j !== 0) {
+			FP[i] = FP[j] + "/" + FP[i];
+			j = dad[j];
+		}
+		dad[i] = 0;
+	}
+
+	FP[0] += "/";
+	for(i=1; i < pl; ++i) {
+		if(FI[i].type !== 2 /* stream */) FP[i] += "/";
+		FPD[FP[i]] = FI[i];
+	}
+}
+
+/* [MS-CFB] 2.6.4 */
+function make_find_path(FullPaths, Paths, FileIndex, files, root_name) {
+	var UCFullPaths = new Array(FullPaths.length);
+	var UCPaths = new Array(Paths.length), i;
+	for(i = 0; i < FullPaths.length; ++i) UCFullPaths[i] = FullPaths[i].toUpperCase().replace(chr0,'').replace(chr1,'!');
+	for(i = 0; i < Paths.length; ++i) UCPaths[i] = Paths[i].toUpperCase().replace(chr0,'').replace(chr1,'!');
+	return function find_path(path/*:string*/) {
+		var k;
+		if(path.charCodeAt(0) === 47 /* "/" */) { k=true; path = root_name + path; }
+		else k = path.indexOf("/") !== -1;
+		var UCPath = path.toUpperCase().replace(chr0,'').replace(chr1,'!');
+		var w = k === true ? UCFullPaths.indexOf(UCPath) : UCPaths.indexOf(UCPath);
+		if(w === -1) return null;
+		return k === true ? FileIndex[w] : files[Paths[w]];
+	};
+}
+
+/** 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 bytes */
+function sleuth_fat(idx, cnt, sectors, ssz, fat_addrs) {
+	var q;
+	if(idx === ENDOFCHAIN) {
+		if(cnt !== 0) throw "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);
+		}
+		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 sl = sectors.length;
+	var buf, buf_chain;
+	if(!chkd) chkd = new Array(sl);
+	var modulus = ssz - 1, j, jj;
+	buf = [];
+	buf_chain = [];
+	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 "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/*:number*/)/*:any*/ {
+	var sl = sectors.length, sector_list = new Array(sl);
+	var chkd = new Array(sl), buf, buf_chain;
+	var modulus = ssz - 1, i, j, k, jj;
+	for(i=0; i < sl; ++i) {
+		buf = [];
+		k = (i + dir_start); if(k >= sl) k-=sl;
+		if(chkd[k] === true) continue;
+		buf_chain = [];
+		for(j=k; 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 "FAT boundary crossed: " + j + " 4 "+ssz;
+			if(!sectors[addr]) break;
+			j = __readInt32LE(sectors[addr], jj);
+		}
+		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) {
+	var blob;
+	var minifat_store = 0, pl = (Paths.length?2:0);
+	var sector = sector_list[dir_start].data;
+	var i = 0, namelen = 0, name, o, ctime, mtime;
+	for(; i < sector.length; i+= 128) {
+		blob = sector.slice(i, i+128);
+		prep_blob(blob, 64);
+		namelen = blob.read_shift(2);
+		if(namelen === 0) continue;
+		name = __utf16le(blob,0,namelen-pl);
+		Paths.push(name);
+		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')
+		}/*:any*/);
+		ctime = blob.read_shift(2) + blob.read_shift(2) + blob.read_shift(2) + blob.read_shift(2);
+		if(ctime !== 0) {
+			o.ctime = ctime; o.ct = read_date(blob, blob.l-8);
+		}
+		mtime = blob.read_shift(2) + blob.read_shift(2) + blob.read_shift(2) + blob.read_shift(2);
+		if(mtime !== 0) {
+			o.mtime = mtime; o.mt = read_date(blob, blob.l-8);
+		}
+		o.start = blob.read_shift(4, 'i');
+		o.size = blob.read_shift(4, 'i');
+		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);
+			prep_blob(o.content, 0);
+		} else {
+			o.storage = 'minifat';
+			if(minifat_store !== ENDOFCHAIN && o.start !== ENDOFCHAIN) {
+				o.content = sector_list[minifat_store].data.slice(o.start*MSSZ,o.start*MSSZ+o.size);
+				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);
+}
+
+var fs;
+function readFileSync(filename/*:string*/, options/*:any*/) {
+	if(fs === undefined) fs = require('fs');
+	return parse(fs.readFileSync(filename), options);
+}
+
+function readSync(blob/*:any*/, options/*:any*/) {
+	switch(options !== undefined && options.type !== undefined ? options.type : "base64") {
+		case "file": return readFileSync(blob, options);
+		case "base64": return parse(s2a(Base64.decode(blob)), options);
+		case "binary": return parse(s2a(blob), options);
+	}
+	return parse(blob);
+}
+
+/** 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_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']
+};
+
+exports.read = readSync;
+exports.parse = parse;
+exports.utils = {
+	ReadShift: ReadShift,
+	CheckField: CheckField,
+	prep_blob: prep_blob,
+	bconcat: bconcat,
+	consts: consts
+};
+
+return exports;
+})();
+
+if(typeof require !== 'undefined' && typeof module !== 'undefined' && typeof DO_NOT_EXPORT_CFB === 'undefined') { module.exports = CFB; }
diff --git a/cfb.js b/cfb.js
index 4d976a0..96561fd 100644
--- a/cfb.js
+++ b/cfb.js
@@ -1,4 +1,4 @@
-/* cfb.js (C) 2013-2014 SheetJS -- http://sheetjs.com */
+/* cfb.js (C) 2013-present SheetJS -- http://sheetjs.com */
 /* vim: set ts=2: */
 /*jshint eqnull:true */
 
@@ -49,7 +49,7 @@ if(typeof Buffer !== "undefined") {
 	};
 	__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(s, "binary"); };
+	s2a = function(s) { return new Buffer(s, "binary"); };
 	bconcat = function(bufs) { return Buffer.isBuffer(bufs[0]) ? Buffer.concat(bufs) : [].concat.apply([], bufs); };
 }
 
@@ -86,7 +86,7 @@ function prep_blob(blob, pos) {
 /* [MS-CFB] v20130118 */
 var CFB = (function _CFB(){
 var exports = {};
-exports.version = '0.10.2';
+exports.version = '0.10.3';
 function parse(file) {
 var mver = 3; // major version
 var ssz = 512; // sector size
@@ -296,6 +296,7 @@ function sleuth_fat(idx, cnt, sectors, ssz, fat_addrs) {
 		if(cnt !== 0) throw "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);
@@ -319,6 +320,7 @@ function get_sector_list(sectors, start, fat_addrs, ssz, chkd) {
 		var addr = fat_addrs[Math.floor(j*4/ssz)];
 		jj = ((j*4) & modulus);
 		if(ssz < 4 + jj) throw "FAT boundary crossed: " + j + " 4 "+ssz;
+		if(!sectors[addr]) break;
 		j = __readInt32LE(sectors[addr], jj);
 	}
 	return {nodes: buf, data:__toBuffer([buf_chain])};
@@ -341,6 +343,7 @@ function make_sector_list(sectors, dir_start, fat_addrs, ssz) {
 			var addr = fat_addrs[Math.floor(j*4/ssz)];
 			jj = ((j*4) & modulus);
 			if(ssz < 4 + jj) throw "FAT boundary crossed: " + j + " 4 "+ssz;
+			if(!sectors[addr]) break;
 			j = __readInt32LE(sectors[addr], jj);
 		}
 		sector_list[k] = {nodes: buf, data:__toBuffer([buf_chain])};
@@ -361,7 +364,7 @@ function read_directory(dir_start, sector_list, sectors, Paths, nmfs, files, Fil
 		if(namelen === 0) continue;
 		name = __utf16le(blob,0,namelen-pl);
 		Paths.push(name);
-		o = {
+		o = ({
 			name:  name,
 			type:  blob.read_shift(1),
 			color: blob.read_shift(1),
@@ -370,7 +373,7 @@ function read_directory(dir_start, sector_list, sectors, Paths, nmfs, files, Fil
 			C:     blob.read_shift(4, 'i'),
 			clsid: blob.read_shift(16),
 			state: blob.read_shift(4, 'i')
-		};
+		});
 		ctime = blob.read_shift(2) + blob.read_shift(2) + blob.read_shift(2) + blob.read_shift(2);
 		if(ctime !== 0) {
 			o.ctime = ctime; o.ct = read_date(blob, blob.l-8);
diff --git a/dist/LICENSE b/dist/LICENSE
index 6d41660..a5fc80a 100644
--- a/dist/LICENSE
+++ b/dist/LICENSE
@@ -1,4 +1,4 @@
-Copyright (C) 2013-2014   SheetJS
+Copyright (C) 2013-present  SheetJS
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
diff --git a/dist/cfb.js b/dist/cfb.js
index 4d976a0..96561fd 100644
--- a/dist/cfb.js
+++ b/dist/cfb.js
@@ -1,4 +1,4 @@
-/* cfb.js (C) 2013-2014 SheetJS -- http://sheetjs.com */
+/* cfb.js (C) 2013-present SheetJS -- http://sheetjs.com */
 /* vim: set ts=2: */
 /*jshint eqnull:true */
 
@@ -49,7 +49,7 @@ if(typeof Buffer !== "undefined") {
 	};
 	__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(s, "binary"); };
+	s2a = function(s) { return new Buffer(s, "binary"); };
 	bconcat = function(bufs) { return Buffer.isBuffer(bufs[0]) ? Buffer.concat(bufs) : [].concat.apply([], bufs); };
 }
 
@@ -86,7 +86,7 @@ function prep_blob(blob, pos) {
 /* [MS-CFB] v20130118 */
 var CFB = (function _CFB(){
 var exports = {};
-exports.version = '0.10.2';
+exports.version = '0.10.3';
 function parse(file) {
 var mver = 3; // major version
 var ssz = 512; // sector size
@@ -296,6 +296,7 @@ function sleuth_fat(idx, cnt, sectors, ssz, fat_addrs) {
 		if(cnt !== 0) throw "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);
@@ -319,6 +320,7 @@ function get_sector_list(sectors, start, fat_addrs, ssz, chkd) {
 		var addr = fat_addrs[Math.floor(j*4/ssz)];
 		jj = ((j*4) & modulus);
 		if(ssz < 4 + jj) throw "FAT boundary crossed: " + j + " 4 "+ssz;
+		if(!sectors[addr]) break;
 		j = __readInt32LE(sectors[addr], jj);
 	}
 	return {nodes: buf, data:__toBuffer([buf_chain])};
@@ -341,6 +343,7 @@ function make_sector_list(sectors, dir_start, fat_addrs, ssz) {
 			var addr = fat_addrs[Math.floor(j*4/ssz)];
 			jj = ((j*4) & modulus);
 			if(ssz < 4 + jj) throw "FAT boundary crossed: " + j + " 4 "+ssz;
+			if(!sectors[addr]) break;
 			j = __readInt32LE(sectors[addr], jj);
 		}
 		sector_list[k] = {nodes: buf, data:__toBuffer([buf_chain])};
@@ -361,7 +364,7 @@ function read_directory(dir_start, sector_list, sectors, Paths, nmfs, files, Fil
 		if(namelen === 0) continue;
 		name = __utf16le(blob,0,namelen-pl);
 		Paths.push(name);
-		o = {
+		o = ({
 			name:  name,
 			type:  blob.read_shift(1),
 			color: blob.read_shift(1),
@@ -370,7 +373,7 @@ function read_directory(dir_start, sector_list, sectors, Paths, nmfs, files, Fil
 			C:     blob.read_shift(4, 'i'),
 			clsid: blob.read_shift(16),
 			state: blob.read_shift(4, 'i')
-		};
+		});
 		ctime = blob.read_shift(2) + blob.read_shift(2) + blob.read_shift(2) + blob.read_shift(2);
 		if(ctime !== 0) {
 			o.ctime = ctime; o.ct = read_date(blob, blob.l-8);
diff --git a/dist/cfb.min.js b/dist/cfb.min.js
index eb3a884..e3d2330 100644
--- a/dist/cfb.min.js
+++ b/dist/cfb.min.js
@@ -1,2 +1,2 @@
-/* cfb.js (C) 2013-2014 SheetJS -- http://sheetjs.com */
-var Base64=function(){var map="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";return{decode:function(input){var o="";var c1,c2,c3;var e1,e2,e3,e4;input=input.replace(/[^\w\+\/\=]/g,"");for(var i=0;i<input.length;){e1=map.indexOf(input.charAt(i++));e2=map.indexOf(input.charAt(i++));c1=e1<<2|e2>>4;o+=String.fromCharCode(c1);e3=map.indexOf(input.charAt(i++));c2=(e2&15)<<4|e3>>2;if(e3!==64){o+=String.fromCharCode(c2)}e4=map.indexOf(input.charAt(i++));c3=(e3&3)<<6|e4;if(e4!==64){o+=String.fromCharCode(c3)}}return o}}}();var chr0=/\u0000/g,chr1=/[\u0001-\u0006]/;var s2a,_s2a;s2a=_s2a=function _s2a(s){return s.split("").map(function(x){return x.charCodeAt(0)&255})};var __toBuffer,___toBuffer;__toBuffer=___toBuffer=function(bufs){var x=[];for(var i=0;i<bufs[0].length;++i){x.push.apply(x,bufs[0][i])}return x};var __utf16le,___utf16le;__utf16le=___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,"").replace(chr1,"!")};var __hexlify,___hexlify;__hexlify=___hexlify=function(b,s,l){return b.slice(s,s+l).map(function(x){return(x<16?"0":"")+x.toString(16)}).join("")};var bconcat=function(bufs){return[].concat.apply([],bufs)};if(typeof Buffer!=="undefined"){__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(s,"binary")};bconcat=function(bufs){return Buffer.isBuffer(bufs[0])?Buffer.concat(bufs):[].concat.apply([],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<32768?u:(65535-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}function CheckField(hexstr,fld){var m=__hexlify(this,this.l,hexstr.length>>1);if(m!==hexstr)throw 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}var CFB=function _CFB(){var exports={};exports.version="0.10.2";function parse(file){var mver=3;var ssz=512;var nmfs=0;var ndfs=0;var dir_start=0;var minifat_start=0;var difat_start=0;var fat_addrs=[];var blob=file.slice(0,512);prep_blob(blob,0);var mv=check_get_mver(blob);mver=mv[0];switch(mver){case 3:ssz=512;break;case 4:ssz=4096;break;default:throw"Major Version: Expected 3 or 4 saw "+mver}if(ssz!==512){blob=file.slice(0,ssz);prep_blob(blob,28)}var header=file.slice(0,ssz);check_shifts(blob,mver);var nds=blob.read_shift(4,"i");if(mver===3&&nds!==0)throw"# Directory Sectors: Expected 0 saw "+nds;blob.l+=4;dir_start=blob.read_shift(4,"i");blob.l+=4;blob.chk("00100000","Mini Stream Cutoff Size: ");minifat_start=blob.read_shift(4,"i");nmfs=blob.read_shift(4,"i");difat_start=blob.read_shift(4,"i");ndfs=blob.read_shift(4,"i");for(var q,j=0;j<109;++j){q=blob.read_shift(4,"i");if(q<0)break;fat_addrs[j]=q}var sectors=sectorify(file,ssz);sleuth_fat(difat_start,ndfs,sectors,ssz,fat_addrs);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;var files={},Paths=[],FileIndex=[],FullPaths=[],FullPathDir={};read_directory(dir_start,sector_list,sectors,Paths,nmfs,files,FileIndex);build_full_paths(FileIndex,FullPathDir,FullPaths,Paths);var root_name=Paths.shift();Paths.root=root_name;var find_path=make_find_path(FullPaths,Paths,FileIndex,files,root_name);return{raw:{header:header,sectors:sectors},FileIndex:FileIndex,FullPaths:FullPaths,FullPathDir:FullPathDir,find:find_path}}function check_get_mver(blob){blob.chk(HEADER_SIGNATURE,"Header Signature: ");blob.chk(HEADER_CLSID,"CLSID: ");var mver=blob.read_shift(2,"u");return[blob.read_shift(2,"u"),mver]}function check_shifts(blob,mver){var shift=9;blob.chk("feff","Byte Order: ");switch(shift=blob.read_shift(2)){case 9:if(mver!==3)throw"MajorVersion/SectorShift Mismatch";break;case 12:if(mver!==4)throw"MajorVersion/SectorShift Mismatch";break;default:throw"Sector Shift: Expected 9 or 12 saw "+shift}blob.chk("0600","Mini Sector Shift: ");blob.chk("000000000000","Reserved: ")}function sectorify(file,ssz){var nsectors=Math.ceil(file.length/ssz)-1;var sectors=new Array(nsectors);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}function build_full_paths(FI,FPD,FP,Paths){var i=0,L=0,R=0,C=0,j=0,pl=Paths.length;var dad=new Array(pl),q=new Array(pl);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&&dad[L]!==L)dad[i]=dad[L];if(R!==-1&&dad[R]!==R)dad[i]=dad[R]}if(C!==-1)dad[C]=i;if(L!==-1){dad[L]=dad[i];q.push(L)}if(R!==-1){dad[R]=dad[i];q.push(R)}}for(i=1;i!==pl;++i)if(dad[i]===i){if(R!==-1&&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)continue;j=dad[i];if(j===0)FP[i]=FP[0]+"/"+FP[i];else while(j!==0){FP[i]=FP[j]+"/"+FP[i];j=dad[j]}dad[i]=0}FP[0]+="/";for(i=1;i<pl;++i){if(FI[i].type!==2)FP[i]+="/";FPD[FP[i]]=FI[i]}}function make_find_path(FullPaths,Paths,FileIndex,files,root_name){var UCFullPaths=new Array(FullPaths.length);var UCPaths=new Array(Paths.length),i;for(i=0;i<FullPaths.length;++i)UCFullPaths[i]=FullPaths[i].toUpperCase().replace(chr0,"").replace(chr1,"!");for(i=0;i<Paths.length;++i)UCPaths[i]=Paths[i].toUpperCase().replace(chr0,"").replace(chr1,"!");return function find_path(path){var k;if(path.charCodeAt(0)===47){k=true;path=root_name+path}else k=path.indexOf("/")!==-1;var UCPath=path.toUpperCase().replace(chr0,"").replace(chr1,"!");var w=k===true?UCFullPaths.indexOf(UCPath):UCPaths.indexOf(UCPath);if(w===-1)return null;return k===true?FileIndex[w]:files[Paths[w]]}}function sleuth_fat(idx,cnt,sectors,ssz,fat_addrs){var q;if(idx===ENDOFCHAIN){if(cnt!==0)throw"DIFAT chain shorter than expected"}else if(idx!==-1){var sector=sectors[idx],m=(ssz>>>2)-1;for(var i=0;i<m;++i){if((q=__readInt32LE(sector,i*4))===ENDOFCHAIN)break;fat_addrs.push(q)}sleuth_fat(__readInt32LE(sector,ssz-4),cnt-1,sectors,ssz,fat_addrs)}}function get_sector_list(sectors,start,fat_addrs,ssz,chkd){var sl=sectors.length;var buf,buf_chain;if(!chkd)chkd=new Array(sl);var modulus=ssz-1,j,jj;buf=[];buf_chain=[];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"FAT boundary crossed: "+j+" 4 "+ssz;j=__readInt32LE(sectors[addr],jj)}return{nodes:buf,data:__toBuffer([buf_chain])}}function make_sector_list(sectors,dir_start,fat_addrs,ssz){var sl=sectors.length,sector_list=new Array(sl);var chkd=new Array(sl),buf,buf_chain;var modulus=ssz-1,i,j,k,jj;for(i=0;i<sl;++i){buf=[];k=i+dir_start;if(k>=sl)k-=sl;if(chkd[k]===true)continue;buf_chain=[];for(j=k;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"FAT boundary crossed: "+j+" 4 "+ssz;j=__readInt32LE(sectors[addr],jj)}sector_list[k]={nodes:buf,data:__toBuffer([buf_chain])}}return sector_list}function read_directory(dir_start,sector_list,sectors,Paths,nmfs,files,FileIndex){var blob;var minifat_store=0,pl=Paths.length?2:0;var sector=sector_list[dir_start].data;var i=0,namelen=0,name,o,ctime,mtime;for(;i<sector.length;i+=128){blob=sector.slice(i,i+128);prep_blob(blob,64);namelen=blob.read_shift(2);if(namelen===0)continue;name=__utf16le(blob,0,namelen-pl);Paths.push(name);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")};ctime=blob.read_shift(2)+blob.read_shift(2)+blob.read_shift(2)+blob.read_shift(2);if(ctime!==0){o.ctime=ctime;o.ct=read_date(blob,blob.l-8)}mtime=blob.read_shift(2)+blob.read_shift(2)+blob.read_shift(2)+blob.read_shift(2);if(mtime!==0){o.mtime=mtime;o.mt=read_date(blob,blob.l-8)}o.start=blob.read_shift(4,"i");o.size=blob.read_shift(4,"i");if(o.type===5){minifat_store=o.start;if(nmfs>0&&minifat_store!==ENDOFCHAIN)sector_list[minifat_store].name="!StreamData"}else if(o.size>=4096){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);prep_blob(o.content,0)}else{o.storage="minifat";if(minifat_store!==ENDOFCHAIN&&o.start!==ENDOFCHAIN){o.content=sector_list[minifat_store].data.slice(o.start*MSSZ,o.start*MSSZ+o.size);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)*1e3)}var fs;function readFileSync(filename,options){if(fs===undefined)fs=require("fs");return parse(fs.readFileSync(filename),options)}function readSync(blob,options){switch(options!==undefined&&options.type!==undefined?options.type:"base64"){case"file":return readFileSync(blob,options);case"base64":return parse(s2a(Base64.decode(blob)),options);case"binary":return parse(s2a(blob),options)}return parse(blob)}var MSSZ=64;var ENDOFCHAIN=-2;var HEADER_SIGNATURE="d0cf11e0a1b11ae1";var HEADER_CLSID="00000000000000000000000000000000";var consts={MAXREGSECT:-6,DIFSECT:-4,FATSECT:-3,ENDOFCHAIN:ENDOFCHAIN,FREESECT:-1,HEADER_SIGNATURE:HEADER_SIGNATURE,HEADER_MINOR_VERSION:"3e00",MAXREGSID:-6,NOSTREAM:-1,HEADER_CLSID:HEADER_CLSID,EntryTypes:["unknown","storage","stream","lockbytes","property","root"]};exports.read=readSync;exports.parse=parse;exports.utils={ReadShift:ReadShift,CheckField:CheckField,prep_blob:prep_blob,bconcat:bconcat,consts:consts};return exports}();if(typeof require!=="undefined"&&typeof module!=="undefined"&&typeof DO_NOT_EXPORT_CFB==="undefined"){module.exports=CFB}
+/* cfb.js (C) 2013-present SheetJS -- http://sheetjs.com */
+var Base64=function(){var map="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";return{decode:function(input){var o="";var c1,c2,c3;var e1,e2,e3,e4;input=input.replace(/[^\w\+\/\=]/g,"");for(var i=0;i<input.length;){e1=map.indexOf(input.charAt(i++));e2=map.indexOf(input.charAt(i++));c1=e1<<2|e2>>4;o+=String.fromCharCode(c1);e3=map.indexOf(input.charAt(i++));c2=(e2&15)<<4|e3>>2;if(e3!==64){o+=String.fromCharCode(c2)}e4=map.indexOf(input.charAt(i++));c3=(e3&3)<<6|e4;if(e4!==64){o+=String.fromCharCode(c3)}}return o}}}();var chr0=/\u0000/g,chr1=/[\u0001-\u0006]/;var s2a,_s2a;s2a=_s2a=function _s2a(s){return s.split("").map(function(x){return x.charCodeAt(0)&255})};var __toBuffer,___toBuffer;__toBuffer=___toBuffer=function(bufs){var x=[];for(var i=0;i<bufs[0].length;++i){x.push.apply(x,bufs[0][i])}return x};var __utf16le,___utf16le;__utf16le=___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,"").replace(chr1,"!")};var __hexlify,___hexlify;__hexlify=___hexlify=function(b,s,l){return b.slice(s,s+l).map(function(x){return(x<16?"0":"")+x.toString(16)}).join("")};var bconcat=function(bufs){return[].concat.apply([],bufs)};if(typeof Buffer!=="undefined"){__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 new Buffer(s,"binary")};bconcat=function(bufs){return Buffer.isBuffer(bufs[0])?Buffer.concat(bufs):[].concat.apply([],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<32768?u:(65535-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}function CheckField(hexstr,fld){var m=__hexlify(this,this.l,hexstr.length>>1);if(m!==hexstr)throw 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}var CFB=function _CFB(){var exports={};exports.version="0.10.3";function parse(file){var mver=3;var ssz=512;var nmfs=0;var ndfs=0;var dir_start=0;var minifat_start=0;var difat_start=0;var fat_addrs=[];var blob=file.slice(0,512);prep_blob(blob,0);var mv=check_get_mver(blob);mver=mv[0];switch(mver){case 3:ssz=512;break;case 4:ssz=4096;break;default:throw"Major Version: Expected 3 or 4 saw "+mver}if(ssz!==512){blob=file.slice(0,ssz);prep_blob(blob,28)}var header=file.slice(0,ssz);check_shifts(blob,mver);var nds=blob.read_shift(4,"i");if(mver===3&&nds!==0)throw"# Directory Sectors: Expected 0 saw "+nds;blob.l+=4;dir_start=blob.read_shift(4,"i");blob.l+=4;blob.chk("00100000","Mini Stream Cutoff Size: ");minifat_start=blob.read_shift(4,"i");nmfs=blob.read_shift(4,"i");difat_start=blob.read_shift(4,"i");ndfs=blob.read_shift(4,"i");for(var q,j=0;j<109;++j){q=blob.read_shift(4,"i");if(q<0)break;fat_addrs[j]=q}var sectors=sectorify(file,ssz);sleuth_fat(difat_start,ndfs,sectors,ssz,fat_addrs);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;var files={},Paths=[],FileIndex=[],FullPaths=[],FullPathDir={};read_directory(dir_start,sector_list,sectors,Paths,nmfs,files,FileIndex);build_full_paths(FileIndex,FullPathDir,FullPaths,Paths);var root_name=Paths.shift();Paths.root=root_name;var find_path=make_find_path(FullPaths,Paths,FileIndex,files,root_name);return{raw:{header:header,sectors:sectors},FileIndex:FileIndex,FullPaths:FullPaths,FullPathDir:FullPathDir,find:find_path}}function check_get_mver(blob){blob.chk(HEADER_SIGNATURE,"Header Signature: ");blob.chk(HEADER_CLSID,"CLSID: ");var mver=blob.read_shift(2,"u");return[blob.read_shift(2,"u"),mver]}function check_shifts(blob,mver){var shift=9;blob.chk("feff","Byte Order: ");switch(shift=blob.read_shift(2)){case 9:if(mver!==3)throw"MajorVersion/SectorShift Mismatch";break;case 12:if(mver!==4)throw"MajorVersion/SectorShift Mismatch";break;default:throw"Sector Shift: Expected 9 or 12 saw "+shift}blob.chk("0600","Mini Sector Shift: ");blob.chk("000000000000","Reserved: ")}function sectorify(file,ssz){var nsectors=Math.ceil(file.length/ssz)-1;var sectors=new Array(nsectors);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}function build_full_paths(FI,FPD,FP,Paths){var i=0,L=0,R=0,C=0,j=0,pl=Paths.length;var dad=new Array(pl),q=new Array(pl);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&&dad[L]!==L)dad[i]=dad[L];if(R!==-1&&dad[R]!==R)dad[i]=dad[R]}if(C!==-1)dad[C]=i;if(L!==-1){dad[L]=dad[i];q.push(L)}if(R!==-1){dad[R]=dad[i];q.push(R)}}for(i=1;i!==pl;++i)if(dad[i]===i){if(R!==-1&&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)continue;j=dad[i];if(j===0)FP[i]=FP[0]+"/"+FP[i];else while(j!==0){FP[i]=FP[j]+"/"+FP[i];j=dad[j]}dad[i]=0}FP[0]+="/";for(i=1;i<pl;++i){if(FI[i].type!==2)FP[i]+="/";FPD[FP[i]]=FI[i]}}function make_find_path(FullPaths,Paths,FileIndex,files,root_name){var UCFullPaths=new Array(FullPaths.length);var UCPaths=new Array(Paths.length),i;for(i=0;i<FullPaths.length;++i)UCFullPaths[i]=FullPaths[i].toUpperCase().replace(chr0,"").replace(chr1,"!");for(i=0;i<Paths.length;++i)UCPaths[i]=Paths[i].toUpperCase().replace(chr0,"").replace(chr1,"!");return function find_path(path){var k;if(path.charCodeAt(0)===47){k=true;path=root_name+path}else k=path.indexOf("/")!==-1;var UCPath=path.toUpperCase().replace(chr0,"").replace(chr1,"!");var w=k===true?UCFullPaths.indexOf(UCPath):UCPaths.indexOf(UCPath);if(w===-1)return null;return k===true?FileIndex[w]:files[Paths[w]]}}function sleuth_fat(idx,cnt,sectors,ssz,fat_addrs){var q;if(idx===ENDOFCHAIN){if(cnt!==0)throw"DIFAT chain shorter than expected"}else if(idx!==-1){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)}sleuth_fat(__readInt32LE(sector,ssz-4),cnt-1,sectors,ssz,fat_addrs)}}function get_sector_list(sectors,start,fat_addrs,ssz,chkd){var sl=sectors.length;var buf,buf_chain;if(!chkd)chkd=new Array(sl);var modulus=ssz-1,j,jj;buf=[];buf_chain=[];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"FAT boundary crossed: "+j+" 4 "+ssz;if(!sectors[addr])break;j=__readInt32LE(sectors[addr],jj)}return{nodes:buf,data:__toBuffer([buf_chain])}}function make_sector_list(sectors,dir_start,fat_addrs,ssz){var sl=sectors.length,sector_list=new Array(sl);var chkd=new Array(sl),buf,buf_chain;var modulus=ssz-1,i,j,k,jj;for(i=0;i<sl;++i){buf=[];k=i+dir_start;if(k>=sl)k-=sl;if(chkd[k]===true)continue;buf_chain=[];for(j=k;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"FAT boundary crossed: "+j+" 4 "+ssz;if(!sectors[addr])break;j=__readInt32LE(sectors[addr],jj)}sector_list[k]={nodes:buf,data:__toBuffer([buf_chain])}}return sector_list}function read_directory(dir_start,sector_list,sectors,Paths,nmfs,files,FileIndex){var blob;var minifat_store=0,pl=Paths.length?2:0;var sector=sector_list[dir_start].data;var i=0,namelen=0,name,o,ctime,mtime;for(;i<sector.length;i+=128){blob=sector.slice(i,i+128);prep_blob(blob,64);namelen=blob.read_shift(2);if(namelen===0)continue;name=__utf16le(blob,0,namelen-pl);Paths.push(name);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")};ctime=blob.read_shift(2)+blob.read_shift(2)+blob.read_shift(2)+blob.read_shift(2);if(ctime!==0){o.ctime=ctime;o.ct=read_date(blob,blob.l-8)}mtime=blob.read_shift(2)+blob.read_shift(2)+blob.read_shift(2)+blob.read_shift(2);if(mtime!==0){o.mtime=mtime;o.mt=read_date(blob,blob.l-8)}o.start=blob.read_shift(4,"i");o.size=blob.read_shift(4,"i");if(o.type===5){minifat_store=o.start;if(nmfs>0&&minifat_store!==ENDOFCHAIN)sector_list[minifat_store].name="!StreamData"}else if(o.size>=4096){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);prep_blob(o.content,0)}else{o.storage="minifat";if(minifat_store!==ENDOFCHAIN&&o.start!==ENDOFCHAIN){o.content=sector_list[minifat_store].data.slice(o.start*MSSZ,o.start*MSSZ+o.size);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)*1e3)}var fs;function readFileSync(filename,options){if(fs===undefined)fs=require("fs");return parse(fs.readFileSync(filename),options)}function readSync(blob,options){switch(options!==undefined&&options.type!==undefined?options.type:"base64"){case"file":return readFileSync(blob,options);case"base64":return parse(s2a(Base64.decode(blob)),options);case"binary":return parse(s2a(blob),options)}return parse(blob)}var MSSZ=64;var ENDOFCHAIN=-2;var HEADER_SIGNATURE="d0cf11e0a1b11ae1";var HEADER_CLSID="00000000000000000000000000000000";var consts={MAXREGSECT:-6,DIFSECT:-4,FATSECT:-3,ENDOFCHAIN:ENDOFCHAIN,FREESECT:-1,HEADER_SIGNATURE:HEADER_SIGNATURE,HEADER_MINOR_VERSION:"3e00",MAXREGSID:-6,NOSTREAM:-1,HEADER_CLSID:HEADER_CLSID,EntryTypes:["unknown","storage","stream","lockbytes","property","root"]};exports.read=readSync;exports.parse=parse;exports.utils={ReadShift:ReadShift,CheckField:CheckField,prep_blob:prep_blob,bconcat:bconcat,consts:consts};return exports}();if(typeof require!=="undefined"&&typeof module!=="undefined"&&typeof DO_NOT_EXPORT_CFB==="undefined"){module.exports=CFB}
diff --git a/dist/cfb.min.map b/dist/cfb.min.map
index 14c4c49..37a2b33 100644
--- a/dist/cfb.min.map
+++ b/dist/cfb.min.map
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\ No newline at end of file
diff --git a/dist/xlscfb.js b/dist/xlscfb.js
index 2bb2335..4d115dd 100644
--- a/dist/xlscfb.js
+++ b/dist/xlscfb.js
@@ -1,12 +1,12 @@
 var DO_NOT_EXPORT_CFB = true;
-/* cfb.js (C) 2013-2014 SheetJS -- http://sheetjs.com */
+/* cfb.js (C) 2013-present SheetJS -- http://sheetjs.com */
 /* vim: set ts=2: */
 /*jshint eqnull:true */
 
 /* [MS-CFB] v20130118 */
 var CFB = (function _CFB(){
 var exports = {};
-exports.version = '0.10.2';
+exports.version = '0.10.3';
 function parse(file) {
 var mver = 3; // major version
 var ssz = 512; // sector size
@@ -216,6 +216,7 @@ function sleuth_fat(idx, cnt, sectors, ssz, fat_addrs) {
 		if(cnt !== 0) throw "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);
@@ -239,6 +240,7 @@ function get_sector_list(sectors, start, fat_addrs, ssz, chkd) {
 		var addr = fat_addrs[Math.floor(j*4/ssz)];
 		jj = ((j*4) & modulus);
 		if(ssz < 4 + jj) throw "FAT boundary crossed: " + j + " 4 "+ssz;
+		if(!sectors[addr]) break;
 		j = __readInt32LE(sectors[addr], jj);
 	}
 	return {nodes: buf, data:__toBuffer([buf_chain])};
@@ -261,6 +263,7 @@ function make_sector_list(sectors, dir_start, fat_addrs, ssz) {
 			var addr = fat_addrs[Math.floor(j*4/ssz)];
 			jj = ((j*4) & modulus);
 			if(ssz < 4 + jj) throw "FAT boundary crossed: " + j + " 4 "+ssz;
+			if(!sectors[addr]) break;
 			j = __readInt32LE(sectors[addr], jj);
 		}
 		sector_list[k] = {nodes: buf, data:__toBuffer([buf_chain])};
@@ -281,7 +284,7 @@ function read_directory(dir_start, sector_list, sectors, Paths, nmfs, files, Fil
 		if(namelen === 0) continue;
 		name = __utf16le(blob,0,namelen-pl);
 		Paths.push(name);
-		o = {
+		o = ({
 			name:  name,
 			type:  blob.read_shift(1),
 			color: blob.read_shift(1),
@@ -290,7 +293,7 @@ function read_directory(dir_start, sector_list, sectors, Paths, nmfs, files, Fil
 			C:     blob.read_shift(4, 'i'),
 			clsid: blob.read_shift(16),
 			state: blob.read_shift(4, 'i')
-		};
+		});
 		ctime = blob.read_shift(2) + blob.read_shift(2) + blob.read_shift(2) + blob.read_shift(2);
 		if(ctime !== 0) {
 			o.ctime = ctime; o.ct = read_date(blob, blob.l-8);
diff --git a/fails.lst b/fails.lst
index 0364914..1eeb7ed 100644
--- a/fails.lst
+++ b/fails.lst
@@ -1,3 +1,6 @@
+apachepoi_testEXCEL_3.xls
+apachepoi_testEXCEL_4.xls
+xlrd_biff4_no_format_no_window2.xls
 roo_type_excelx.xls
 roo_type_openoffice.xls
 libreoffice_calc_csv-import_malformed-quotes.xls
diff --git a/index.html b/index.html
index 97af2eb..1758e7f 100644
--- a/index.html
+++ b/index.html
@@ -1,4 +1,10 @@
 <!DOCTYPE html>
+<!-- cfb.js (C) 2013-present  SheetJS http://sheetjs.com -->
+<!-- vim: set ts=2: -->
+<html>
+<head>
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+<title>JS-CFB Live Demo</title>
 <style>
 #drop{
 	border:2px dashed #bbb;
@@ -13,15 +19,33 @@
 	width:100%;
 }
 </style>
+</head>
+<body>
 <b>JS-CFB Live Demo</b><br />
 
 <div id="drop">Drop an XLS file here to see the CFB structure.</div>
+Advanced Demo Options: <br />
+Use readAsBinaryString: (when available) <input type="checkbox" name="userabs" checked><br />
 <pre id="out"></pre>
 <br />
 <script src="cfb.js"></script>
 <script>
+/*jshint browser:true */
+/*global CFB, out */
+var rABS = typeof FileReader !== "undefined" && typeof FileReader.prototype !== "undefined" && typeof FileReader.prototype.readAsBinaryString !== "undefined";
+if(!rABS) {
+	document.getElementsByName("userabs")[0].disabled = true;
+	document.getElementsByName("userabs")[0].checked = false;
+}
+
+function fixdata(data) {
+	var o = "", l = 0, w = 10240;
+	for(; l<data.byteLength/w; ++l) o+=String.fromCharCode.apply(null,new Uint8Array(data.slice(l*w,l*w+w)));
+	o+=String.fromCharCode.apply(null, new Uint8Array(data.slice(l*w)));
+	return o;
+}
+
 function process_data(data) {
-	var output = "";
 	if(out.innerText === undefined) out.textContent = data.FullPaths;
 	else out.innerText = data.FullPaths.join("\n");
 }
@@ -30,18 +54,25 @@ var drop = document.getElementById('drop');
 function handleDrop(e) {
 	e.stopPropagation();
 	e.preventDefault();
+	rABS = document.getElementsByName("userabs")[0].checked;
 	var files = e.dataTransfer.files;
-	var i,f;
-	for (i = 0, f = files[i]; i != files.length; ++i) {
+	var f = files[0];
+	{
 		var reader = new FileReader();
-		var name = f.name;
+		//var name = f.name;
 		reader.onload = function(e) {
 			var data = e.target.result;
-			var cfb = CFB.read(data, {type: 'binary'});
+			var cfb;
+			if(rABS) {
+				cfb = CFB.read(data, {type: 'binary'});
+			} else {
+				var arr = fixdata(data);
+				cfb = CFB.read(btoa(arr), {type: 'base64'});
+			}
 			process_data(cfb);
 		};
-		reader.readAsBinaryString(f);
-		//reader.readAsArrayBuffer(f);
+		if(rABS) reader.readAsBinaryString(f);
+		else reader.readAsArrayBuffer(f);
 	}
 }
 
@@ -57,3 +88,5 @@ if(drop.addEventListener) {
 	drop.addEventListener('drop', handleDrop, false);
 }
 </script>
+</body>
+</html>
diff --git a/misc/flow.js b/misc/flow.js
new file mode 100644
index 0000000..f9a5c9f
--- /dev/null
+++ b/misc/flow.js
@@ -0,0 +1,5 @@
+/*::
+
+type CFBModule = any;
+
+*/
diff --git a/misc/flowdeps.js b/misc/flowdeps.js
new file mode 100644
index 0000000..16cac2a
--- /dev/null
+++ b/misc/flowdeps.js
@@ -0,0 +1,9 @@
+/*::
+
+declare module 'cfb' { declare var exports:CFBModule; };
+declare module '../' { declare var exports:CFBModule; };
+declare module './' { declare var exports:CFBModule; };
+
+declare module 'commander' { declare var exports:any; };
+
+*/
diff --git a/misc/help.sh b/misc/help.sh
new file mode 100755
index 0000000..7a1c4c4
--- /dev/null
+++ b/misc/help.sh
@@ -0,0 +1,42 @@
+#!/bin/bash
+# make_help.sh -- process listing of targets and special items in Makefile
+# Copyright (C) 2016-present  SheetJS
+#
+# usage in makefile: pipe the output of the following command:
+#     @grep -hE '(^[a-zA-Z_-][ a-zA-Z_-]*:.*?|^#[#*])' $(MAKEFILE_LIST)
+#
+# lines starting with "## " are treated as subtitles
+# lines starting with "#* " are treated as plaintext comments
+# multiple targets with "## " after the ":" are rendered as separate targets
+# if the presumed default target is labeled, it will be assigned a unique color
+
+awk '
+BEGIN{recipes=0;}
+	!/#[#*] .*$/ {next;}
+	{multi=0; isrecipe=0;}
+	/^[^#]*:/ {isrecipe=1; ++recipes;}
+	/^[^ :]* .*:/ {multi=1}
+	multi==0 && isrecipe>0 { if(recipes > 1) print; else print $0, "[default]"; next}
+	isrecipe == 0 {print; next}
+	multi>0 {
+		k=split($0, msg, "##"); m=split($0, a, ":"); n=split(a[1], b, " ");
+		for(i=1; i<=n; ++i) print b[i] ":", "##" msg[2], (recipes==1 && i==1 ? "[default]" : "")
+	}
+END {}
+' | if [[ -t 1 ]]; then
+awk '
+BEGIN {FS = ":.*?## "}
+	{color=36}
+	/\[default\]/ {color=35}
+	NF==1 && /^##/ {color=34}
+	NF==1 && /^#\*/ {color=20; $1 = substr($1, 4)}
+	{printf "\033[" color "m%-20s\033[0m %s\n", $1, $2;}
+END{}' -
+else
+awk '
+BEGIN {FS = ":.*?## "}
+	/^#\* / {$1 = substr($1, 4)}
+	{printf "%-20s %s\n", $1, $2;}
+END{}' -
+fi
+
diff --git a/misc/spin.sh b/misc/spin.sh
index 9951a57..471dfee 100755
--- a/misc/spin.sh
+++ b/misc/spin.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 # spin.sh -- show a spinner (for coverage test)
-# Copyright (C) 2014  SheetJS
+# Copyright (C) 2014-present  SheetJS
 
 wpid=$1
 delay=1
diff --git a/misc/suppress_export.js b/misc/suppress_export.js
index 6366ccf..c7f0105 100644
--- a/misc/suppress_export.js
+++ b/misc/suppress_export.js
@@ -1 +1,15 @@
 var DO_NOT_EXPORT_CFB = true;
+/*::
+declare var Base64:any;
+declare var ReadShift:any;
+declare var CheckField:any;
+declare var prep_blob:any;
+declare var __readUInt32LE:any;
+declare var __readInt32LE:any;
+declare var __toBuffer:any;
+declare var __utf16le:any;
+declare var bconcat:any;
+declare var s2a:any;
+declare var chr0:any;
+declare var chr1:any;
+*/
diff --git a/package.json b/package.json
index a0da1dc..3c78ae2 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "cfb",
-  "version": "0.10.2-a",
+  "version": "0.10.3",
   "author": "sheetjs",
   "description": "Compound File Binary File Format extractor",
   "keywords": [ "cfb", "compression", "office" ],
@@ -13,7 +13,8 @@
     "README.md",
     "bin/",
     "dist/",
-    "cfb.js"
+    "cfb.js",
+    "xlscfb.flow.js"
   ],
   "dependencies": {
     "commander":""
diff --git a/xlscfb.flow.js b/xlscfb.flow.js
new file mode 100644
index 0000000..aa4b49e
--- /dev/null
+++ b/xlscfb.flow.js
@@ -0,0 +1,410 @@
+var DO_NOT_EXPORT_CFB = true;
+/*::
+declare var Base64:any;
+declare var ReadShift:any;
+declare var CheckField:any;
+declare var prep_blob:any;
+declare var __readUInt32LE:any;
+declare var __readInt32LE:any;
+declare var __toBuffer:any;
+declare var __utf16le:any;
+declare var bconcat:any;
+declare var s2a:any;
+declare var chr0:any;
+declare var chr1:any;
+*/
+/* cfb.js (C) 2013-present SheetJS -- http://sheetjs.com */
+/* vim: set ts=2: */
+/*jshint eqnull:true */
+
+/*::
+declare var DO_NOT_EXPORT_CFB:any;
+type SectorEntry = any;
+type SectorList = {
+	(k:string|number):SectorEntry;
+	name:?string;
+	fat_addrs:any;
+	ssz:number;
+}
+*/
+/* [MS-CFB] v20130118 */
+var CFB = (function _CFB(){
+var exports = {};
+exports.version = '0.10.3';
+function parse(file) {
+var mver = 3; // major version
+var ssz = 512; // sector size
+var nmfs = 0; // number of mini FAT sectors
+var ndfs = 0; // number of DIFAT sectors
+var dir_start = 0; // first directory sector location
+var minifat_start = 0; // first mini FAT sector location
+var difat_start = 0; // first mini FAT sector location
+
+var fat_addrs = []; // locations of FAT sectors
+
+/* [MS-CFB] 2.2 Compound File Header */
+var blob/*:any*/ = 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;
+	default: throw "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 nds = blob.read_shift(4, 'i');
+if(mver === 3 && nds !== 0) throw '# Directory Sectors: Expected 0 saw ' + nds;
+
+// Number of FAT Sectors
+//var nfs = blob.read_shift(4, 'i');
+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
+ndfs = blob.read_shift(4, 'i');
+
+// Grab FAT Sector Locations
+for(var q, 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, ndfs, sectors, ssz, fat_addrs);
+
+/** Chains */
+var sector_list/*:SectorList*/ = 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/*:any*/ = [], FileIndex = [], FullPaths = [], FullPathDir = {};
+read_directory(dir_start, sector_list, sectors, Paths, nmfs, files, FileIndex);
+
+build_full_paths(FileIndex, FullPathDir, FullPaths, Paths);
+
+var root_name = Paths.shift();
+Paths.root = root_name;
+
+/* [MS-CFB] 2.6.4 (Unicode 3.0.1 case conversion) */
+var find_path = make_find_path(FullPaths, Paths, FileIndex, files, root_name);
+
+return {
+	raw: {header: header, sectors: sectors},
+	FileIndex: FileIndex,
+	FullPaths: FullPaths,
+	FullPathDir: FullPathDir,
+	find: find_path
+};
+} // parse
+
+/* [MS-CFB] 2.2 Compound File Header -- read up to major version */
+function check_get_mver(blob) {
+	// header signature 8
+	blob.chk(HEADER_SIGNATURE, 'Header Signature: ');
+
+	// clsid 16
+	blob.chk(HEADER_CLSID, 'CLSID: ');
+
+	// 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: ');
+
+	// Sector Shift
+	switch((shift = blob.read_shift(2))) {
+		case 0x09: if(mver !== 3) throw 'MajorVersion/SectorShift Mismatch'; break;
+		case 0x0c: if(mver !== 4) throw 'MajorVersion/SectorShift Mismatch'; break;
+		default: throw '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 = new Array(nsectors);
+	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, FPD, FP, Paths) {
+	var i = 0, L = 0, R = 0, C = 0, j = 0, pl = Paths.length;
+	var dad = new Array(pl), q = new Array(pl);
+
+	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) { dad[L] = dad[i]; q.push(L); }
+		if(R !== -1) { dad[R] = dad[i]; 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 = dad[i];
+		if(j === 0) FP[i] = FP[0] + "/" + FP[i];
+		else while(j !== 0) {
+			FP[i] = FP[j] + "/" + FP[i];
+			j = dad[j];
+		}
+		dad[i] = 0;
+	}
+
+	FP[0] += "/";
+	for(i=1; i < pl; ++i) {
+		if(FI[i].type !== 2 /* stream */) FP[i] += "/";
+		FPD[FP[i]] = FI[i];
+	}
+}
+
+/* [MS-CFB] 2.6.4 */
+function make_find_path(FullPaths, Paths, FileIndex, files, root_name) {
+	var UCFullPaths = new Array(FullPaths.length);
+	var UCPaths = new Array(Paths.length), i;
+	for(i = 0; i < FullPaths.length; ++i) UCFullPaths[i] = FullPaths[i].toUpperCase().replace(chr0,'').replace(chr1,'!');
+	for(i = 0; i < Paths.length; ++i) UCPaths[i] = Paths[i].toUpperCase().replace(chr0,'').replace(chr1,'!');
+	return function find_path(path/*:string*/) {
+		var k;
+		if(path.charCodeAt(0) === 47 /* "/" */) { k=true; path = root_name + path; }
+		else k = path.indexOf("/") !== -1;
+		var UCPath = path.toUpperCase().replace(chr0,'').replace(chr1,'!');
+		var w = k === true ? UCFullPaths.indexOf(UCPath) : UCPaths.indexOf(UCPath);
+		if(w === -1) return null;
+		return k === true ? FileIndex[w] : files[Paths[w]];
+	};
+}
+
+/** 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 bytes */
+function sleuth_fat(idx, cnt, sectors, ssz, fat_addrs) {
+	var q;
+	if(idx === ENDOFCHAIN) {
+		if(cnt !== 0) throw "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);
+		}
+		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 sl = sectors.length;
+	var buf, buf_chain;
+	if(!chkd) chkd = new Array(sl);
+	var modulus = ssz - 1, j, jj;
+	buf = [];
+	buf_chain = [];
+	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 "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/*:number*/)/*:any*/ {
+	var sl = sectors.length, sector_list = new Array(sl);
+	var chkd = new Array(sl), buf, buf_chain;
+	var modulus = ssz - 1, i, j, k, jj;
+	for(i=0; i < sl; ++i) {
+		buf = [];
+		k = (i + dir_start); if(k >= sl) k-=sl;
+		if(chkd[k] === true) continue;
+		buf_chain = [];
+		for(j=k; 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 "FAT boundary crossed: " + j + " 4 "+ssz;
+			if(!sectors[addr]) break;
+			j = __readInt32LE(sectors[addr], jj);
+		}
+		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) {
+	var blob;
+	var minifat_store = 0, pl = (Paths.length?2:0);
+	var sector = sector_list[dir_start].data;
+	var i = 0, namelen = 0, name, o, ctime, mtime;
+	for(; i < sector.length; i+= 128) {
+		blob = sector.slice(i, i+128);
+		prep_blob(blob, 64);
+		namelen = blob.read_shift(2);
+		if(namelen === 0) continue;
+		name = __utf16le(blob,0,namelen-pl);
+		Paths.push(name);
+		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')
+		}/*:any*/);
+		ctime = blob.read_shift(2) + blob.read_shift(2) + blob.read_shift(2) + blob.read_shift(2);
+		if(ctime !== 0) {
+			o.ctime = ctime; o.ct = read_date(blob, blob.l-8);
+		}
+		mtime = blob.read_shift(2) + blob.read_shift(2) + blob.read_shift(2) + blob.read_shift(2);
+		if(mtime !== 0) {
+			o.mtime = mtime; o.mt = read_date(blob, blob.l-8);
+		}
+		o.start = blob.read_shift(4, 'i');
+		o.size = blob.read_shift(4, 'i');
+		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);
+			prep_blob(o.content, 0);
+		} else {
+			o.storage = 'minifat';
+			if(minifat_store !== ENDOFCHAIN && o.start !== ENDOFCHAIN) {
+				o.content = sector_list[minifat_store].data.slice(o.start*MSSZ,o.start*MSSZ+o.size);
+				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);
+}
+
+var fs;
+function readFileSync(filename/*:string*/, options/*:any*/) {
+	if(fs === undefined) fs = require('fs');
+	return parse(fs.readFileSync(filename), options);
+}
+
+function readSync(blob/*:any*/, options/*:any*/) {
+	switch(options !== undefined && options.type !== undefined ? options.type : "base64") {
+		case "file": return readFileSync(blob, options);
+		case "base64": return parse(s2a(Base64.decode(blob)), options);
+		case "binary": return parse(s2a(blob), options);
+	}
+	return parse(blob);
+}
+
+/** 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_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']
+};
+
+exports.read = readSync;
+exports.parse = parse;
+exports.utils = {
+	ReadShift: ReadShift,
+	CheckField: CheckField,
+	prep_blob: prep_blob,
+	bconcat: bconcat,
+	consts: consts
+};
+
+return exports;
+})();
+
+if(typeof require !== 'undefined' && typeof module !== 'undefined' && typeof DO_NOT_EXPORT_CFB === 'undefined') { module.exports = CFB; }
diff --git a/xlscfb.js b/xlscfb.js
index 2bb2335..4d115dd 100644
--- a/xlscfb.js
+++ b/xlscfb.js
@@ -1,12 +1,12 @@
 var DO_NOT_EXPORT_CFB = true;
-/* cfb.js (C) 2013-2014 SheetJS -- http://sheetjs.com */
+/* cfb.js (C) 2013-present SheetJS -- http://sheetjs.com */
 /* vim: set ts=2: */
 /*jshint eqnull:true */
 
 /* [MS-CFB] v20130118 */
 var CFB = (function _CFB(){
 var exports = {};
-exports.version = '0.10.2';
+exports.version = '0.10.3';
 function parse(file) {
 var mver = 3; // major version
 var ssz = 512; // sector size
@@ -216,6 +216,7 @@ function sleuth_fat(idx, cnt, sectors, ssz, fat_addrs) {
 		if(cnt !== 0) throw "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);
@@ -239,6 +240,7 @@ function get_sector_list(sectors, start, fat_addrs, ssz, chkd) {
 		var addr = fat_addrs[Math.floor(j*4/ssz)];
 		jj = ((j*4) & modulus);
 		if(ssz < 4 + jj) throw "FAT boundary crossed: " + j + " 4 "+ssz;
+		if(!sectors[addr]) break;
 		j = __readInt32LE(sectors[addr], jj);
 	}
 	return {nodes: buf, data:__toBuffer([buf_chain])};
@@ -261,6 +263,7 @@ function make_sector_list(sectors, dir_start, fat_addrs, ssz) {
 			var addr = fat_addrs[Math.floor(j*4/ssz)];
 			jj = ((j*4) & modulus);
 			if(ssz < 4 + jj) throw "FAT boundary crossed: " + j + " 4 "+ssz;
+			if(!sectors[addr]) break;
 			j = __readInt32LE(sectors[addr], jj);
 		}
 		sector_list[k] = {nodes: buf, data:__toBuffer([buf_chain])};
@@ -281,7 +284,7 @@ function read_directory(dir_start, sector_list, sectors, Paths, nmfs, files, Fil
 		if(namelen === 0) continue;
 		name = __utf16le(blob,0,namelen-pl);
 		Paths.push(name);
-		o = {
+		o = ({
 			name:  name,
 			type:  blob.read_shift(1),
 			color: blob.read_shift(1),
@@ -290,7 +293,7 @@ function read_directory(dir_start, sector_list, sectors, Paths, nmfs, files, Fil
 			C:     blob.read_shift(4, 'i'),
 			clsid: blob.read_shift(16),
 			state: blob.read_shift(4, 'i')
-		};
+		});
 		ctime = blob.read_shift(2) + blob.read_shift(2) + blob.read_shift(2) + blob.read_shift(2);
 		if(ctime !== 0) {
 			o.ctime = ctime; o.ct = read_date(blob, blob.l-8);