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*/ = []; for(var i = 0; i < data.length; ++i) o[i] = String.fromCharCode(data[i]); return o.join(""); } function a2u(data/*:Array*/)/*:Uint8Array*/ { if(typeof Uint8Array === 'undefined') throw new Error("Unsupported"); return new Uint8Array(data); } function ab2a(data/*:ArrayBuffer|Uint8Array*/)/*:Array*/ { 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;