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js-cfb
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version bump 0.1.0: exposing utility functions

This commit is contained in:
SheetJS 2013-09-13 09:31:52 -07:00
parent af6457acf9
commit aeefaecd76
2 changed files with 17 additions and 5 deletions
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20
cfb.js
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@ -1,6 +1,7 @@
/* vim: set ts=2: */
/*jshint eqnull:true */
/** Helper Functions */
function readIEEE754(buf, idx, isLE, nl, ml) {
if(isLE === undefined) isLE = true;
if(!nl) nl = 8;
@ -87,6 +88,7 @@ Array.prototype.utf8 = function(s,e) { var str = ""; for(var i=s; i<e; i++) str
function bconcat(bufs) { return (typeof Buffer !== 'undefined') ? Buffer.concat(bufs) : [].concat.apply([], bufs); }
/** Buffer helpers -- keep track of read location `.l` and move it */
function ReadShift(size, t) {
var o, w, vv; t = t || 'u';
if(size === 'ieee754') { size = 8; t = 'f'; }
@ -108,7 +110,6 @@ function CheckField(hexstr, fld) {
if(m !== hexstr) throw (fld||"") + 'Expected ' + hexstr + ' saw ' + m;
this.l += hexstr.length/2;
}
function WarnField(hexstr, fld) {
var m = this.slice(this.l, this.l+hexstr.length/2).hexlify('hex');
if(m !== hexstr) console.error((fld||"") + 'Expected ' + hexstr +' saw ' + m);
@ -122,7 +123,7 @@ function prep_blob(blob, pos) {
return [read, chk];
}
/* [MS-CFB] v20120705 */
/* [MS-CFB] v20130118 */
var CFB = (function(){
function parse(file) {
@ -279,7 +280,7 @@ sector_list[dir_start].name = "!Directory";
if(nmfs > 0) sector_list[minifat_start].name = "!MiniFAT";
sector_list[fat_addrs[0]].name = "!FAT";
/** read directory structure */
/* [MS-CFB] 2.6.1 Compound File Directory Entry */
var files = {}, Paths = [];
function read_directory(idx) {
var blob, read;
@ -371,20 +372,30 @@ return this;
/** CFB Constants */
{
/* 2.1 Compund File Sector Numbers and Types */
var MAXREGSECT = 0xFFFFFFFA;
var DIFSECT = 0xFFFFFFFC;
var FATSECT = 0xFFFFFFFD;
var ENDOFCHAIN = 0xFFFFFFFE;
var FREESECT = 0xFFFFFFFF;
/* 2.2 Compound File Header */
var HEADER_SIGNATURE = 'd0cf11e0a1b11ae1';
var HEADER_MINOR_VERSION = '3e00';
var MAXREGSID = 0xFFFFFFFA;
var NOSTREAM = 0xFFFFFFFF;
var HEADER_CLSID = '00000000000000000000000000000000';
/* 2.6.1 Compound File Directory Entry */
var EntryTypes = ['unknown','storage','stream',null,null,'root'];
}
var CFB_utils = {
ReadShift: ReadShift,
WarnField: WarnField,
CheckField: CheckField,
prep_blob: prep_blob,
bconcat: bconcat
};
if(typeof require !== 'undefined' && typeof exports !== 'undefined') {
Array.prototype.toBuffer = function() {
return Buffer.concat(this[0]);
@ -392,6 +403,7 @@ if(typeof require !== 'undefined' && typeof exports !== 'undefined') {
var fs = require('fs');
exports.read = CFB.read;
exports.parse = CFB.parse;
exports.utils = CFB_utils;
exports.main = function(args) {
var cfb = CFB.read(args[0], {type:'file'});
console.log(cfb);

2
package.json
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@ -1,6 +1,6 @@
{
"name": "cfb",
"version": "0.0.2",
"version": "0.1.0",
"author": "Niggler",
"description": "Compound File Binary File Format extractor",
"keywords": [ "cfb", "compression", "office" ],