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var has_buf = (typeof Buffer !== 'undefined' && typeof process !== 'undefined' && typeof process.versions !== 'undefined' && !!process.versions.node);
var Buffer_from = /*::(*/function(){}/*:: :any)*/;
if(typeof Buffer !== 'undefined') {	var nbfs = !Buffer.from;	if(!nbfs) try { Buffer.from("foo", "utf8"); } catch(e) { nbfs = true; }	Buffer_from = nbfs ? function(buf, enc) { return (enc) ? new Buffer(buf, enc) : new Buffer(buf); } : Buffer.from.bind(Buffer);	// $FlowIgnore	if(!Buffer.alloc) Buffer.alloc = function(n) { return new Buffer(n); };	// $FlowIgnore	if(!Buffer.allocUnsafe) Buffer.allocUnsafe = function(n) { return new Buffer(n); };}
function new_raw_buf(len/*:number*/) {	/* jshint -W056 */	return has_buf ? Buffer.alloc(len) : new Array(len);	/* jshint +W056 */}
function new_unsafe_buf(len/*:number*/) {	/* jshint -W056 */	return has_buf ? Buffer.allocUnsafe(len) : new Array(len);	/* jshint +W056 */}
var s2a = function s2a(s/*:string*/)/*:any*/ {	if(has_buf) return Buffer_from(s, "binary");	return s.split("").map(function(x/*:string*/)/*:number*/{ return x.charCodeAt(0) & 0xff; });};
function s2ab(s/*:string*/)/*:any*/ {	if(typeof ArrayBuffer === 'undefined') return s2a(s);	var buf = new ArrayBuffer(s.length), view = new Uint8Array(buf);	for (var i=0; i!=s.length; ++i) view[i] = s.charCodeAt(i) & 0xFF;	return buf;}
function a2s(data/*:any*/)/*:string*/ {	if(Array.isArray(data)) return data.map(function(c) { return String.fromCharCode(c); }).join("");	var o/*:Array<string>*/ = []; for(var i = 0; i < data.length; ++i) o[i] = String.fromCharCode(data[i]); return o.join("");}
function a2u(data/*:Array<number>*/)/*:Uint8Array*/ {	if(typeof Uint8Array === 'undefined') throw new Error("Unsupported");	return new Uint8Array(data);}
function ab2a(data/*:ArrayBuffer|Uint8Array*/)/*:Array<number>*/ {	if(typeof ArrayBuffer == 'undefined') throw new Error("Unsupported");	if(data instanceof ArrayBuffer) return ab2a(new Uint8Array(data));	/*:: if(data instanceof ArrayBuffer) throw new Error("unreachable"); */	var o = new Array(data.length);	for(var i = 0; i < data.length; ++i) o[i] = data[i];	return o;}
var bconcat = function(bufs) { return [].concat.apply([], bufs); };
var chr0 = /\u0000/g, chr1 = /[\u0001-\u0006]/g;