text: function write_UInt32LE(x/*:number*/, o) {
  	if(!o) o = new_buf(4);
  	o.write_shift(4, x);
  	return o;
  }
  
  /* [MS-XLSB] 2.5.168 */
  function parse_XLWideString(data/*::, length*/)/*:string*/ {
  	var cchCharacters = data.read_shift(4);
  	return cchCharacters === 0 ? "" : data.read_shift(cchCharacters, 'dbcs');
  }
  function write_XLWideString(data/*:string*/, o) {
  	var _null = false; if(o == null) { _null = true; o = new_buf(4+2*data.length); }
  	o.write_shift(4, data.length);
  	if(data.length > 0) o.write_shift(0, data, 'dbcs');
  	return _null ? o.slice(0, o.l) : o;
  }
  
  /* [MS-XLSB] 2.5.143 */
  function parse_StrRun(data, length/*:?number*/) {
  	return { ich: data.read_shift(2), ifnt: data.read_shift(2) };
  }
  function write_StrRun(run, o) {
  	if(!o) o = new_buf(4);
  	o.write_shift(2, run.ich || 0);
  	o.write_shift(2, run.ifnt || 0);
  	return o;
  }
  
  /* [MS-XLSB] 2.1.7.121 */
  function parse_RichStr(data, length/*:number*/)/*:XLString*/ {
  	var start = data.l;
  	var flags = data.read_shift(1);
  	var str = parse_XLWideString(data);
  	var rgsStrRun = [];
  	var z = ({ t: str, h: str }/*:any*/);
  	if((flags & 1) !== 0) { /* fRichStr */
  		/* TODO: formatted string */
  		var dwSizeStrRun = data.read_shift(4);
  		for(var i = 0; i != dwSizeStrRun; ++i) rgsStrRun.push(parse_StrRun(data));
  		z.r = rgsStrRun;
  	}
  	else z.r = [{ich:0, ifnt:0}];
  	//if((flags & 2) !== 0) { /* fExtStr */
  	//	/* TODO: phonetic string */
  	//}
  	data.l = start + length;
  	return z;
  }
  function write_RichStr(str/*:XLString*/, o/*:?Block*/)/*:Block*/ {
  	/* TODO: formatted string */
  	var _null = false; if(o == null) { _null = true; o = new_buf(15+4*str.t.length); }
  	o.write_shift(1,0);
  	write_XLWideString(str.t, o);
  	return _null ? o.slice(0, o.l) : o;
  }
  /* [MS-XLSB] 2.4.325 BrtCommentText (RichStr w/1 run) */
  var parse_BrtCommentText = parse_RichStr;
  function write_BrtCommentText(str/*:XLString*/, o/*:?Block*/)/*:Block*/ {
  	/* TODO: formatted string */
  	var _null = false; if(o == null) { _null = true; o = new_buf(23+4*str.t.length); }
  	o.write_shift(1,1);
  	write_XLWideString(str.t, o);
  	o.write_shift(4,1);
  	write_StrRun({ich:0,ifnt:0}, o);
  	return _null ? o.slice(0, o.l) : o;
  }
  
  /* [MS-XLSB] 2.5.9 */
  function parse_XLSBCell(data)/*:any*/ {
  	var col = data.read_shift(4);
  	var iStyleRef = data.read_shift(2);
  	iStyleRef += data.read_shift(1) <<16;
  	var fPhShow = data.read_shift(1);
  	return { c:col, iStyleRef: iStyleRef };
  }
  function write_XLSBCell(cell/*:any*/, o/*:?Block*/) {
  	if(o == null) o = new_buf(8);
  	o.write_shift(-4, cell.c);
  	o.write_shift(3, cell.iStyleRef || cell.s);
  	o.write_shift(1, 0); /* fPhShow */
  	return o;
  }
  
  
  /* [MS-XLSB] 2.5.21 */
  var parse_XLSBCodeName = parse_XLWideString;
  var write_XLSBCodeName = write_XLWideString;
  
  /* [MS-XLSB] 2.5.166 */
  function parse_XLNullableWideString(data/*::, length*/)/*:string*/ {
  	var cchCharacters = data.read_shift(4);
  	return cchCharacters === 0 || cchCharacters === 0xFFFFFFFF ? "" : data.read_shift(cchCharacters, 'dbcs');
  }
  function write_XLNullableWideString(data/*:string*/, o) {
  	var _null = false; if(o == null) { _null = true; o = new_buf(127); }
  	o.write_shift(4, data.length > 0 ? data.length : 0xFFFFFFFF);
  	if(data.length > 0) o.write_shift(0, data, 'dbcs');
  	return _null ? o.slice(0, o.l) : o;
  }
  
  /* [MS-XLSB] 2.5.165 */
  var parse_XLNameWideString = parse_XLWideString;
  var write_XLNameWideString = write_XLWideString;
  
  /* [MS-XLSB] 2.5.114 */
  var parse_RelID = parse_XLNullableWideString;
  var write_RelID = write_XLNullableWideString;
  
  
  /* [MS-XLSB] 2.5.122 */
  /* [MS-XLS] 2.5.217 */
  function parse_RkNumber(data)/*:number*/ {
  	var b = data.slice(data.l, data.l+4);
  	var fX100 = b[0] & 1, fInt = b[0] & 2;
  	data.l+=4;
  	b[0] &= 0xFC; // b[0] &= ~3;
  	var RK = fInt === 0 ? __double([0,0,0,0,b[0],b[1],b[2],b[3]],0) : __readInt32LE(b,0)>>2;
  	return fX100 ? RK/100 : RK;
  }
  function write_RkNumber(data/*:number*/, o) {
  	if(o == null) o = new_buf(4);
  	var fX100 = 0, fInt = 0, d100 = data * 100;
  	if(data == (data | 0) && data >= -(1<<29) && data < (1 << 29)) { fInt = 1; }
  	else if(d100 == (d100 | 0) && d100 >= -(1<<29) && d100 < (1 << 29)) { fInt = 1; fX100 = 1; }
  	if(fInt) o.write_shift(-4, ((fX100 ? d100 : data) << 2) + (fX100 + 2));
  	else throw new Error("unsupported RkNumber " + data); // TODO
  }
  
  
  /* [MS-XLSB] 2.5.117 RfX */
  function parse_RfX(data /*::, length*/)/*:Range*/ {
  	var cell/*:Range*/ = ({s: {}, e: {}}/*:any*/);
  	cell.s.r = data.read_shift(4);
  	cell.e.r = data.read_shift(4);
  	cell.s.c = data.read_shift(4);
  	cell.e.c = data.read_shift(4);
  	return cell;
  }
  
  function write_RfX(r/*:Range*/, o) {
  	if(!o) o = new_buf(16);
  	o.write_shift(4, r.s.r);
  	o.write_shift(4, r.e.r);
  	o.write_shift(4, r.s.c);
  	o.write_shift(4, r.e.c);
  	return o;
  }
  
  /* [MS-XLSB] 2.5.153 UncheckedRfX */
  var parse_UncheckedRfX = parse_RfX;
  var write_UncheckedRfX = write_RfX;
  
  /* [MS-XLSB] 2.5.171 */
  /* [MS-XLS] 2.5.342 */
  /* TODO: error checking, NaN and Infinity values are not valid Xnum */
  function parse_Xnum(data, length/*:?number*/) { return data.read_shift(8, 'f'); }
  function write_Xnum(data, o) { return (o || new_buf(8)).write_shift(8, data, 'f'); }
  
  /* [MS-XLSB] 2.5.198.2 */
  var BErr = {
  	/*::[*/0x00/*::]*/: "#NULL!",
  	/*::[*/0x07/*::]*/: "#DIV/0!",
  	/*::[*/0x0F/*::]*/: "#VALUE!",
  	/*::[*/0x17/*::]*/: "#REF!",
  	/*::[*/0x1D/*::]*/: "#NAME?",
  	/*::[*/0x24/*::]*/: "#NUM!",
  	/*::[*/0x2A/*::]*/: "#N/A",
  	/*::[*/0x2B/*::]*/: "#GETTING_DATA",
  	/*::[*/0xFF/*::]*/: "#WTF?"
  };
  var RBErr = evert_num(BErr);
  
  /* [MS-XLSB] 2.4.321 BrtColor */
  function parse_BrtColor(data, length/*:number*/) {
  	var out = {};
  	var d = data.read_shift(1);
  
  	var fValidRGB = d & 1;
  	var xColorType = d >>> 1;
  
  	var index = data.read_shift(1);
  	var nTS = data.read_shift(2, 'i');
  	var bR = data.read_shift(1);
  	var bG = data.read_shift(1);
  	var bB = data.read_shift(1);
  	var bAlpha = data.read_shift(1);
  
  	switch(xColorType) {
  		case 0: out.auto = 1; break;
  		case 1:
  			out.index = index;
  			var icv = XLSIcv[index];
  			/* automatic pseudo index 81 */
  			if(icv) out.rgb = rgb2Hex(icv);
  			break;
  		case 2:
  			/* if(!fValidRGB) throw new Error("invalid"); */
  			out.rgb = rgb2Hex([bR, bG, bB]);
  			break;
  		case 3: out.theme = index; break;
  	}
  	if(nTS != 0) out.tint = nTS > 0 ? nTS / 32767 : nTS / 32768;
  
  	return out;
  }
  function write_BrtColor(color, o) {
  	if(!o) o = new_buf(8);
  	if(!color||color.auto) { o.write_shift(4, 0); o.write_shift(4, 0); return o; }
  	if(color.index) {
  		o.write_shift(1, 0x02);
  		o.write_shift(1, color.index);
  	} else if(color.theme) {
  		o.write_shift(1, 0x06);
  		o.write_shift(1, color.theme);
  	} else {
  		o.write_shift(1, 0x05);
  		o.write_shift(1, 0);
  	}
  	var nTS = color.tint || 0;
  	if(nTS > 0) nTS *= 32767;
  	else if(nTS < 0) nTS *= 32768;
  	o.write_shift(2, nTS);
  	if(!color.rgb) {
  		o.write_shift(2, 0);
  		o.write_shift(1, 0);
  		o.write_shift(1, 0);
  	} else {
  		var rgb = (color.rgb || 'FFFFFF');
  		o.write_shift(1, parseInt(rgb.substr(0,2),16));
  		o.write_shift(1, parseInt(rgb.substr(2,2),16));
  		o.write_shift(1, parseInt(rgb.substr(4,2),16));
  		o.write_shift(1, 0xFF);
  	}
  	return o;
  }
  
  /* [MS-XLSB] 2.5.52 */
  function parse_FontFlags(data, length/*:number*/, opts) {
  	var d = data.read_shift(1);
  	data.l++;
  	var out = {
  		/* fBold: d & 0x01 */
  		fItalic: d & 0x02,
  		/* fUnderline: d & 0x04 */
  		fStrikeout: d & 0x08,
  		fOutline: d & 0x10,
  		fShadow: d & 0x20,
  		fCondense: d & 0x40,
  		fExtend: d & 0x80
  	};
  	return out;
  }
  function write_FontFlags(font, o) {
  	if(!o) o = new_buf(2);
  	var grbit =
  		(font.italic   ? 0x02 : 0) |
  		(font.strike   ? 0x08 : 0) |
  		(font.outline  ? 0x10 : 0) |
  		(font.shadow   ? 0x20 : 0) |
  		(font.condense ? 0x40 : 0) |
  		(font.extend   ? 0x80 : 0);
  	o.write_shift(1, grbit);
  	o.write_shift(1, 0);
  	return o;
  }
  
  /* [MS-OLEDS] 2.3.1 and 2.3.2 */
  function parse_ClipboardFormatOrString(o, w/*:number*/)/*:string*/ {
  	// $FlowIgnore
  	var ClipFmt = {2:"BITMAP",3:"METAFILEPICT",8:"DIB",14:"ENHMETAFILE"};
  	var m/*:number*/ = o.read_shift(4);
  	switch(m) {
  		case 0x00000000: return "";
  		case 0xffffffff: case 0xfffffffe: return ClipFmt[o.read_shift(4)]||"";
  	}
  	if(m > 0x190) throw new Error("Unsupported Clipboard: " + m.toString(16));
  	o.l -= 4;
  	return o.read_shift(0, w == 1 ? "lpstr" : "lpwstr");
  }
  function parse_ClipboardFormatOrAnsiString(o) { return parse_ClipboardFormatOrString(o, 1); }
  function parse_ClipboardFormatOrUnicodeString(o) { return parse_ClipboardFormatOrString(o, 2); }
  
  