code: function find(cfb, path) {
  	var UCFullPaths = cfb.FullPaths.map(function(x) { return x.toUpperCase(); });
  	var UCPaths = UCFullPaths.map(function(x) { var y = x.split("/"); return y[y.length - (x.slice(-1) == "/" ? 2 : 1)]; });
  	var k = false;
  	if(path.charCodeAt(0) === 47 /* "/" */) { k = true; path = UCFullPaths[0].slice(0, -1) + path; }
  	else k = path.indexOf("/") !== -1;
  	var UCPath = path.toUpperCase();
  	var w = k === true ? UCFullPaths.indexOf(UCPath) : UCPaths.indexOf(UCPath);
  	if(w !== -1) return cfb.FileIndex[w];
  
  	var m = !UCPath.match(chr1);
  	UCPath = UCPath.replace(chr0,'');
  	if(m) UCPath = UCPath.replace(chr1,'!');
  	for(w = 0; w < UCFullPaths.length; ++w) {
  		if((m ? UCFullPaths[w].replace(chr1,'!') : UCFullPaths[w]).replace(chr0,'') == UCPath) return cfb.FileIndex[w];
  		if((m ? UCPaths[w].replace(chr1,'!') : UCPaths[w]).replace(chr0,'') == UCPath) return cfb.FileIndex[w];
  	}
  	return null;
  }
docs: /* [MS-CFB] 2.6.4 (Unicode 3.0.1 case conversion)