SheetJS
fcc05e3567
- reprocess directory sector lists if not available - search now strips out OLE metacharacters \0-\5 - strip sourceMappingURL references from minified scripts (h/t @vinin3) - added xlscfb.js for js-xls
34 lines
835 B
JavaScript
34 lines
835 B
JavaScript
/* [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: ');
|
|
}
|
|
|