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/* [MS-XLSB] 2.1.4 Record */function recordhopper(data, cb/*:RecordHopperCB*/, opts/*:?any*/) {	if(!data) return;	var tmpbyte, cntbyte, length;	prep_blob(data, data.l || 0);	var L = data.length, RT = 0, tgt = 0;	while(data.l < L) {		RT = data.read_shift(1);		if(RT & 0x80) RT = (RT & 0x7F) + ((data.read_shift(1) & 0x7F)<<7);		var R = XLSBRecordEnum[RT] || XLSBRecordEnum[0xFFFF];		tmpbyte = data.read_shift(1);		length = tmpbyte & 0x7F;		for(cntbyte = 1; cntbyte <4 && (tmpbyte & 0x80); ++cntbyte) length += ((tmpbyte = data.read_shift(1)) & 0x7F)<<(7*cntbyte);		tgt = data.l + length;		var d = R.f && R.f(data, length, opts);		data.l = tgt;		if(cb(d, R.n, RT)) return;	}}
/* control buffer usage for fixed-length buffers */function buf_array()/*:BufArray*/ {	var bufs/*:Array<Block>*/ = [], blksz = has_buf ? 256 : 2048;	var newblk = function ba_newblk(sz/*:number*/)/*:Block*/ {		var o/*:Block*/ = (new_buf(sz)/*:any*/);		prep_blob(o, 0);		return o;	};
	var curbuf/*:Block*/ = newblk(blksz);
	var endbuf = function ba_endbuf() {		if(!curbuf) return;		if(curbuf.length > curbuf.l) { curbuf = curbuf.slice(0, curbuf.l); curbuf.l = curbuf.length; }		if(curbuf.length > 0) bufs.push(curbuf);		curbuf = null;	};
	var next = function ba_next(sz/*:number*/)/*:Block*/ {		if(curbuf && (sz < (curbuf.length - curbuf.l))) return curbuf;		endbuf();		return (curbuf = newblk(Math.max(sz+1, blksz)));	};
	var end = function ba_end() {		endbuf();		return bconcat(bufs);	};
	var push = function ba_push(buf) { endbuf(); curbuf = buf; if(curbuf.l == null) curbuf.l = curbuf.length; next(blksz); };
	return ({ next:next, push:push, end:end, _bufs:bufs }/*:any*/);}
function write_record(ba/*:BufArray*/, type/*:string*/, payload, length/*:?number*/) {	if(!XLSBRE) make_XLSBRE();	var t/*:number*/ = +XLSBRE[type], l;	if(isNaN(t)) return; // TODO: throw something here?	if(!length) length = XLSBRecordEnum[t].p || (payload||[]).length || 0;	l = 1 + (t >= 0x80 ? 1 : 0) + 1/* + length*/;	if(length >= 0x80) ++l; if(length >= 0x4000) ++l; if(length >= 0x200000) ++l;	var o = ba.next(l);	if(t <= 0x7F) o.write_shift(1, t);	else {		o.write_shift(1, (t & 0x7F) + 0x80);		o.write_shift(1, (t >> 7));	}	for(var i = 0; i != 4; ++i) {		if(length >= 0x80) { o.write_shift(1, (length & 0x7F)+0x80); length >>= 7; }		else { o.write_shift(1, length); break; }	}	if(/*:: length != null &&*/length > 0 && is_buf(payload)) ba.push(payload);}