version bump 0.5.0: scan directory first

basic parse tests pass

Author: SheetJSDev

Diff for: cfb.js

@@ -240,11 +240,10 @@ for(j = 0; blob.l != 512; ) {
 
 
 /** Break the file up into sectors */
-if(file.length%ssz!==0) console.error("CFB: size " + file.length + " % "+ssz);
-
 var nsectors = Math.ceil((file.length - ssz)/ssz);
 var sectors = [];
-for(var i=1; i != nsectors + 1; ++i) sectors[i-1] = file.slice(i*ssz,(i+1)*ssz);
+for(var i=1; i != nsectors; ++i) sectors[i-1] = file.slice(i*ssz,(i+1)*ssz);
+sectors[nsectors-1] = file.slice(nsectors*ssz)
 
 /** 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 */
@@ -282,11 +281,11 @@ function get_next_sector(idx) { return get_buffer_u32(idx); }
 var chkd = new Array(sectors.length), sector_list = [];
 var get_sector = function get_sector(k) { return sectors[k]; };
 for(i=0; i != sectors.length; ++i) {
-	var buf = [];
-	if(chkd[i]) continue;
-	for(j=i; j<=MAXREGSECT; buf.push(j),j=get_next_sector(j)) chkd[j] = true;
-	sector_list[i] = {nodes: buf};
-	sector_list[i].data = Array(buf.map(get_sector)).toBuffer();
+	var buf = [], k = (i + dir_start) % sectors.length;
+	if(chkd[k]) continue;
+	for(j=k; j<=MAXREGSECT; buf.push(j),j=get_next_sector(j)) chkd[j] = true;
+	sector_list[k] = {nodes: buf};
+	sector_list[k].data = Array(buf.map(get_sector)).toBuffer();
 }
 sector_list[dir_start].name = "!Directory";
 if(nmfs > 0 && minifat_start !== ENDOFCHAIN) sector_list[minifat_start].name = "!MiniFAT";
@@ -335,7 +334,7 @@ function read_directory(idx) {
 		} else {
 			o.storage = 'minifat';
 			w = o.start * mssz;
-			if(minifat_store !== ENDOFCHAIN) {
+			if(minifat_store !== ENDOFCHAIN && o.start !== ENDOFCHAIN) {
 				o.content = sector_list[minifat_store].data.slice(w,w+o.size);
 				prep_blob(o.content);
 			}

Diff for: package.json

@@ -1,6 +1,6 @@
 {
 	"name": "cfb",
-	"version": "0.4.0",
+	"version": "0.5.0",
 	"author": "Niggler",
 	"description": "Compound File Binary File Format extractor",
 	"keywords": [ "cfb", "compression", "office" ],