js-cfb/bits/44_readdir.js

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/* [MS-CFB] 2.6.1 Compound File Directory Entry */
var files = {}, Paths = [], FileIndex = [], FullPaths = [], FullPathDir = {};
function read_directory(idx) {
var blob, read, w;
var sector = sector_list[idx].data;
for(var i = 0; i != sector.length; i+= 128) {
blob = sector.slice(i, i+128);
prep_blob(blob, 64);
read = ReadShift.bind(blob);
var namelen = read(2);
if(namelen === 0) return;
var name = blob.utf16le(0,namelen-(Paths.length?2:0)); // OLE
Paths.push(name);
var o = { name: name };
o.type = EntryTypes[read(1)];
o.color = read(1);
o.left = read(4); if(o.left === NOSTREAM) delete o.left;
o.right = read(4); if(o.right === NOSTREAM) delete o.right;
o.child = read(4); if(o.child === NOSTREAM) delete o.child;
o.clsid = read(16);
o.state = read(4);
var ctime = read(8); if(ctime != "0000000000000000") o.ctime = ctime;
var mtime = read(8); if(mtime != "0000000000000000") o.mtime = mtime;
o.start = read(4);
o.size = read(4);
if(o.type === 'root') { //root entry
minifat_store = o.start;
if(nmfs > 0 && minifat_store !== ENDOFCHAIN) sector_list[minifat_store].name = "!StreamData";
minifat_size = o.size;
} else if(o.size >= ms_cutoff_size) {
o.storage = 'fat';
if(!sector_list[o.start] && dir_start > 0) o.start = (o.start + dir_start) % sectors.length;
sector_list[o.start].name = o.name;
o.content = sector_list[o.start].data.slice(0,o.size);
prep_blob(o.content);
} else {
o.storage = 'minifat';
w = o.start * mssz;
if(minifat_store !== ENDOFCHAIN && o.start !== ENDOFCHAIN) {
o.content = sector_list[minifat_store].data.slice(w,w+o.size);
prep_blob(o.content);
}
}
if(o.ctime) {
var ct = blob.slice(blob.l-24, blob.l-16);
var c2 = (ct.readUInt32LE(4)/1e7)*Math.pow(2,32)+ct.readUInt32LE(0)/1e7;
o.ct = new Date((c2 - 11644473600)*1000);
}
if(o.mtime) {
var mt = blob.slice(blob.l-16, blob.l-8);
var m2 = (mt.readUInt32LE(4)/1e7)*Math.pow(2,32)+mt.readUInt32LE(0)/1e7;
o.mt = new Date((m2 - 11644473600)*1000);
}
files[name] = o;
FileIndex.push(o);
}
}
read_directory(dir_start);