sheetjs/bits/58_cmntbin.js

/* [MS-XLSB] 2.4.28 BrtBeginComment */
function parse_BrtBeginComment(data, length) {
	var out = {};
	out.iauthor = data.read_shift(4);
	var rfx = parse_UncheckedRfX(data, 16);
	out.rfx = rfx.s;
	out.ref = encode_cell(rfx.s);
	data.l += 16; /*var guid = parse_GUID(data); */
	return out;
}

/* [MS-XLSB] 2.4.324 BrtCommentAuthor */
var parse_BrtCommentAuthor = parse_XLWideString;

/* [MS-XLSB] 2.4.325 BrtCommentText */
var parse_BrtCommentText = parse_RichStr;

/* [MS-XLSB] 2.1.7.8 Comments */
function parse_comments_bin(data, opts) {
	var out = [];
	var authors = [];
	var c = {};
	var pass = false;
	recordhopper(data, function hopper_cmnt(val, R, RT) {
		switch(R.n) {
			case 'BrtCommentAuthor': authors.push(val); break;
			case 'BrtBeginComment': c = val; break;
			case 'BrtCommentText': c.t = val.t; c.h = val.h; c.r = val.r; break;
			case 'BrtEndComment':
				c.author = authors[c.iauthor];
				delete c.iauthor;
				if(opts.sheetRows && opts.sheetRows <= c.rfx.r) break;
				delete c.rfx; out.push(c); break;
			case 'BrtBeginComments': break;
			case 'BrtEndComments': break;
			case 'BrtBeginCommentAuthors': break;
			case 'BrtEndCommentAuthors': break;
			case 'BrtBeginCommentList': break;
			case 'BrtEndCommentList': break;
			default: if(!pass || opts.WTF) throw new Error("Unexpected record " + RT + " " + R.n);
		}
	});
	return out;
}

function write_comments_bin(data, opts) { }