{"id":"DHrQ","dependencies":[{"name":"D:\\1PROJECTS\\Linway\\package.json","includedInParent":true,"mtime":1649861917996},{"name":"D:\\1PROJECTS\\Linway\\node_modules\\readable-stream\\package.json","includedInParent":true,"mtime":1649842737478},{"name":"process-nextick-args","loc":{"line":26,"column":18},"parent":"D:\\1PROJECTS\\Linway\\node_modules\\readable-stream\\lib\\_stream_readable.js","resolved":"D:\\1PROJECTS\\Linway\\node_modules\\process-nextick-args\\index.js"},{"name":"isarray","loc":{"line":32,"column":22},"parent":"D:\\1PROJECTS\\Linway\\node_modules\\readable-stream\\lib\\_stream_readable.js","resolved":"D:\\1PROJECTS\\Linway\\node_modules\\isarray\\index.js"},{"name":"events","loc":{"line":42,"column":17},"parent":"D:\\1PROJECTS\\Linway\\node_modules\\readable-stream\\lib\\_stream_readable.js","resolved":"D:\\1PROJECTS\\Linway\\node_modules\\events\\events.js"},{"name":"./internal/streams/stream","loc":{"line":50,"column":21},"parent":"D:\\1PROJECTS\\Linway\\node_modules\\readable-stream\\lib\\_stream_readable.js","resolved":"D:\\1PROJECTS\\Linway\\node_modules\\readable-stream\\lib\\internal\\streams\\stream-browser.js"},{"name":"safe-buffer","loc":{"line":55,"column":21},"parent":"D:\\1PROJECTS\\Linway\\node_modules\\readable-stream\\lib\\_stream_readable.js","resolved":"D:\\1PROJECTS\\Linway\\node_modules\\safe-buffer\\index.js"},{"name":"core-util-is","loc":{"line":67,"column":19},"parent":"D:\\1PROJECTS\\Linway\\node_modules\\readable-stream\\lib\\_stream_readable.js","resolved":"D:\\1PROJECTS\\Linway\\node_modules\\core-util-is\\lib\\util.js"},{"name":"inherits","loc":{"line":68,"column":24},"parent":"D:\\1PROJECTS\\Linway\\node_modules\\readable-stream\\lib\\_stream_readable.js","resolved":"D:\\1PROJECTS\\Linway\\node_modules\\inherits\\inherits_browser.js"},{"name":"util","loc":{"line":72,"column":24},"parent":"D:\\1PROJECTS\\Linway\\node_modules\\readable-stream\\lib\\_stream_readable.js","resolved":"D:\\1PROJECTS\\Linway\\node_modules\\parcel-bundler\\src\\builtins\\_empty.js"},{"name":"./internal/streams/BufferList","loc":{"line":81,"column":25},"parent":"D:\\1PROJECTS\\Linway\\node_modules\\readable-stream\\lib\\_stream_readable.js","resolved":"D:\\1PROJECTS\\Linway\\node_modules\\readable-stream\\lib\\internal\\streams\\BufferList.js"},{"name":"./internal/streams/destroy","loc":{"line":82,"column":26},"parent":"D:\\1PROJECTS\\Linway\\node_modules\\readable-stream\\lib\\_stream_readable.js","resolved":"D:\\1PROJECTS\\Linway\\node_modules\\readable-stream\\lib\\internal\\streams\\destroy.js"},{"name":"./_stream_duplex","loc":{"line":179,"column":29},"parent":"D:\\1PROJECTS\\Linway\\node_modules\\readable-stream\\lib\\_stream_readable.js","resolved":"D:\\1PROJECTS\\Linway\\node_modules\\readable-stream\\lib\\_stream_duplex.js"},{"name":"string_decoder/","loc":{"line":328,"column":46},"parent":"D:\\1PROJECTS\\Linway\\node_modules\\readable-stream\\lib\\_stream_readable.js","resolved":"D:\\1PROJECTS\\Linway\\node_modules\\string_decoder\\lib\\string_decoder.js"},{"name":"process","parent":"D:\\1PROJECTS\\Linway\\node_modules\\readable-stream\\lib\\_stream_readable.js","resolved":"D:\\1PROJECTS\\Linway\\node_modules\\process\\browser.js"}],"generated":{"js":"\nvar global = arguments[3];\nvar process = require(\"process\");\nvar e=arguments[3],t=require(\"process\"),n=require(\"process-nextick-args\");module.exports=_;var r,i=require(\"isarray\");_.ReadableState=w;var a=require(\"events\").EventEmitter,d=function(e,t){return e.listeners(t).length},o=require(\"./internal/streams/stream\"),s=require(\"safe-buffer\").Buffer,u=e.Uint8Array||function(){};function l(e){return s.from(e)}function h(e){return s.isBuffer(e)||e instanceof u}var p=require(\"core-util-is\");p.inherits=require(\"inherits\");var f=require(\"util\"),c=void 0;c=f&&f.debuglog?f.debuglog(\"stream\"):function(){};var g,b=require(\"./internal/streams/BufferList\"),m=require(\"./internal/streams/destroy\");p.inherits(_,o);var v=[\"error\",\"close\",\"destroy\",\"pause\",\"resume\"];function y(e,t,n){if(\"function\"==typeof e.prependListener)return e.prependListener(t,n);e._events&&e._events[t]?i(e._events[t])?e._events[t].unshift(n):e._events[t]=[n,e._events[t]]:e.on(t,n)}function w(e,t){e=e||{};var n=t instanceof(r=r||require(\"./_stream_duplex\"));this.objectMode=!!e.objectMode,n&&(this.objectMode=this.objectMode||!!e.readableObjectMode);var i=e.highWaterMark,a=e.readableHighWaterMark,d=this.objectMode?16:16384;this.highWaterMark=i||0===i?i:n&&(a||0===a)?a:d,this.highWaterMark=Math.floor(this.highWaterMark),this.buffer=new b,this.length=0,this.pipes=null,this.pipesCount=0,this.flowing=null,this.ended=!1,this.endEmitted=!1,this.reading=!1,this.sync=!0,this.needReadable=!1,this.emittedReadable=!1,this.readableListening=!1,this.resumeScheduled=!1,this.destroyed=!1,this.defaultEncoding=e.defaultEncoding||\"utf8\",this.awaitDrain=0,this.readingMore=!1,this.decoder=null,this.encoding=null,e.encoding&&(g||(g=require(\"string_decoder/\").StringDecoder),this.decoder=new g(e.encoding),this.encoding=e.encoding)}function _(e){if(r=r||require(\"./_stream_duplex\"),!(this instanceof _))return new _(e);this._readableState=new w(e,this),this.readable=!0,e&&(\"function\"==typeof e.read&&(this._read=e.read),\"function\"==typeof e.destroy&&(this._destroy=e.destroy)),o.call(this)}function M(e,t,n,r,i){var a,d=e._readableState;null===t?(d.reading=!1,x(e,d)):(i||(a=k(d,t)),a?e.emit(\"error\",a):d.objectMode||t&&t.length>0?(\"string\"==typeof t||d.objectMode||Object.getPrototypeOf(t)===s.prototype||(t=l(t)),r?d.endEmitted?e.emit(\"error\",new Error(\"stream.unshift() after end event\")):S(e,d,t,!0):d.ended?e.emit(\"error\",new Error(\"stream.push() after EOF\")):(d.reading=!1,d.decoder&&!n?(t=d.decoder.write(t),d.objectMode||0!==t.length?S(e,d,t,!1):C(e,d)):S(e,d,t,!1))):r||(d.reading=!1));return j(d)}function S(e,t,n,r){t.flowing&&0===t.length&&!t.sync?(e.emit(\"data\",n),e.read(0)):(t.length+=t.objectMode?1:n.length,r?t.buffer.unshift(n):t.buffer.push(n),t.needReadable&&q(e)),C(e,t)}function k(e,t){var n;return h(t)||\"string\"==typeof t||void 0===t||e.objectMode||(n=new TypeError(\"Invalid non-string/buffer chunk\")),n}function j(e){return!e.ended&&(e.needReadable||e.length=R?e=R:(e--,e|=e>>>1,e|=e>>>2,e|=e>>>4,e|=e>>>8,e|=e>>>16,e++),e}function L(e,t){return e<=0||0===t.length&&t.ended?0:t.objectMode?1:e!=e?t.flowing&&t.length?t.buffer.head.data.length:t.length:(e>t.highWaterMark&&(t.highWaterMark=E(e)),e<=t.length?e:t.ended?t.length:(t.needReadable=!0,0))}function x(e,t){if(!t.ended){if(t.decoder){var n=t.decoder.end();n&&n.length&&(t.buffer.push(n),t.length+=t.objectMode?1:n.length)}t.ended=!0,q(e)}}function q(e){var t=e._readableState;t.needReadable=!1,t.emittedReadable||(c(\"emitReadable\",t.flowing),t.emittedReadable=!0,t.sync?n.nextTick(W,e):W(e))}function W(e){c(\"emit readable\"),e.emit(\"readable\"),B(e)}function C(e,t){t.readingMore||(t.readingMore=!0,n.nextTick(D,e,t))}function D(e,t){for(var n=t.length;!t.reading&&!t.flowing&&!t.ended&&t.length=t.length?(n=t.decoder?t.buffer.join(\"\"):1===t.buffer.length?t.buffer.head.data:t.buffer.concat(t.length),t.buffer.clear()):n=I(e,t.buffer,t.decoder),n);var n}function I(e,t,n){var r;return ea.length?a.length:e;if(d===a.length?i+=a:i+=a.slice(0,e),0===(e-=d)){d===a.length?(++r,n.next?t.head=n.next:t.head=t.tail=null):(t.head=n,n.data=a.slice(d));break}++r}return t.length-=r,i}function F(e,t){var n=s.allocUnsafe(e),r=t.head,i=1;for(r.data.copy(n),e-=r.data.length;r=r.next;){var a=r.data,d=e>a.length?a.length:e;if(a.copy(n,n.length-e,0,d),0===(e-=d)){d===a.length?(++i,r.next?t.head=r.next:t.head=t.tail=null):(t.head=r,r.data=a.slice(d));break}++i}return t.length-=i,n}function z(e){var t=e._readableState;if(t.length>0)throw new Error('\"endReadable()\" called on non-empty stream');t.endEmitted||(t.ended=!0,n.nextTick(G,t,e))}function G(e,t){e.endEmitted||0!==e.length||(e.endEmitted=!0,t.readable=!1,t.emit(\"end\"))}function J(e,t){for(var n=0,r=e.length;n=t.highWaterMark||t.ended))return c(\"read: emitReadable\",t.length,t.ended),0===t.length&&t.ended?z(this):q(this),null;if(0===(e=L(e,t))&&t.ended)return 0===t.length&&z(this),null;var r,i=t.needReadable;return c(\"need readable\",i),(0===t.length||t.length-e0?H(e,t):null)?(t.needReadable=!0,e=0):t.length-=e,0===t.length&&(t.ended||(t.needReadable=!0),n!==e&&t.ended&&z(this)),null!==r&&this.emit(\"data\",r),r},_.prototype._read=function(e){this.emit(\"error\",new Error(\"_read() is not implemented\"))},_.prototype.pipe=function(e,r){var i=this,a=this._readableState;switch(a.pipesCount){case 0:a.pipes=e;break;case 1:a.pipes=[a.pipes,e];break;default:a.pipes.push(e)}a.pipesCount+=1,c(\"pipe count=%d opts=%j\",a.pipesCount,r);var o=(!r||!1!==r.end)&&e!==t.stdout&&e!==t.stderr?u:v;function s(t,n){c(\"onunpipe\"),t===i&&n&&!1===n.hasUnpiped&&(n.hasUnpiped=!0,c(\"cleanup\"),e.removeListener(\"close\",b),e.removeListener(\"finish\",m),e.removeListener(\"drain\",l),e.removeListener(\"error\",g),e.removeListener(\"unpipe\",s),i.removeListener(\"end\",u),i.removeListener(\"end\",v),i.removeListener(\"data\",f),h=!0,!a.awaitDrain||e._writableState&&!e._writableState.needDrain||l())}function u(){c(\"onend\"),e.end()}a.endEmitted?n.nextTick(o):i.once(\"end\",o),e.on(\"unpipe\",s);var l=O(i);e.on(\"drain\",l);var h=!1;var p=!1;function f(t){c(\"ondata\"),p=!1,!1!==e.write(t)||p||((1===a.pipesCount&&a.pipes===e||a.pipesCount>1&&-1!==J(a.pipes,e))&&!h&&(c(\"false write response, pause\",i._readableState.awaitDrain),i._readableState.awaitDrain++,p=!0),i.pause())}function g(t){c(\"onerror\",t),v(),e.removeListener(\"error\",g),0===d(e,\"error\")&&e.emit(\"error\",t)}function b(){e.removeListener(\"finish\",m),v()}function m(){c(\"onfinish\"),e.removeListener(\"close\",b),v()}function v(){c(\"unpipe\"),i.unpipe(e)}return i.on(\"data\",f),y(e,\"error\",g),e.once(\"close\",b),e.once(\"finish\",m),e.emit(\"pipe\",i),a.flowing||(c(\"pipe resume\"),i.resume()),e},_.prototype.unpipe=function(e){var t=this._readableState,n={hasUnpiped:!1};if(0===t.pipesCount)return this;if(1===t.pipesCount)return e&&e!==t.pipes?this:(e||(e=t.pipes),t.pipes=null,t.pipesCount=0,t.flowing=!1,e&&e.emit(\"unpipe\",this,n),this);if(!e){var r=t.pipes,i=t.pipesCount;t.pipes=null,t.pipesCount=0,t.flowing=!1;for(var a=0;a*/\n\nvar pna = require('process-nextick-args');\n/**/\n\nmodule.exports = Readable;\n\n/**/\nvar isArray = require('isarray');\n/**/\n\n/**/\nvar Duplex;\n/**/\n\nReadable.ReadableState = ReadableState;\n\n/**/\nvar EE = require('events').EventEmitter;\n\nvar EElistenerCount = function (emitter, type) {\n return emitter.listeners(type).length;\n};\n/**/\n\n/**/\nvar Stream = require('./internal/streams/stream');\n/**/\n\n/**/\n\nvar Buffer = require('safe-buffer').Buffer;\nvar OurUint8Array = global.Uint8Array || function () {};\nfunction _uint8ArrayToBuffer(chunk) {\n return Buffer.from(chunk);\n}\nfunction _isUint8Array(obj) {\n return Buffer.isBuffer(obj) || obj instanceof OurUint8Array;\n}\n\n/**/\n\n/**/\nvar util = require('core-util-is');\nutil.inherits = require('inherits');\n/**/\n\n/**/\nvar debugUtil = require('util');\nvar debug = void 0;\nif (debugUtil && debugUtil.debuglog) {\n debug = debugUtil.debuglog('stream');\n} else {\n debug = function () {};\n}\n/**/\n\nvar BufferList = require('./internal/streams/BufferList');\nvar destroyImpl = require('./internal/streams/destroy');\nvar StringDecoder;\n\nutil.inherits(Readable, Stream);\n\nvar kProxyEvents = ['error', 'close', 'destroy', 'pause', 'resume'];\n\nfunction prependListener(emitter, event, fn) {\n // Sadly this is not cacheable as some libraries bundle their own\n // event emitter implementation with them.\n if (typeof emitter.prependListener === 'function') return emitter.prependListener(event, fn);\n\n // This is a hack to make sure that our error handler is attached before any\n // userland ones. NEVER DO THIS. This is here only because this code needs\n // to continue to work with older versions of Node.js that do not include\n // the prependListener() method. The goal is to eventually remove this hack.\n if (!emitter._events || !emitter._events[event]) emitter.on(event, fn);else if (isArray(emitter._events[event])) emitter._events[event].unshift(fn);else emitter._events[event] = [fn, emitter._events[event]];\n}\n\nfunction ReadableState(options, stream) {\n Duplex = Duplex || require('./_stream_duplex');\n\n options = options || {};\n\n // Duplex streams are both readable and writable, but share\n // the same options object.\n // However, some cases require setting options to different\n // values for the readable and the writable sides of the duplex stream.\n // These options can be provided separately as readableXXX and writableXXX.\n var isDuplex = stream instanceof Duplex;\n\n // object stream flag. Used to make read(n) ignore n and to\n // make all the buffer merging and length checks go away\n this.objectMode = !!options.objectMode;\n\n if (isDuplex) this.objectMode = this.objectMode || !!options.readableObjectMode;\n\n // the point at which it stops calling _read() to fill the buffer\n // Note: 0 is a valid value, means \"don't call _read preemptively ever\"\n var hwm = options.highWaterMark;\n var readableHwm = options.readableHighWaterMark;\n var defaultHwm = this.objectMode ? 16 : 16 * 1024;\n\n if (hwm || hwm === 0) this.highWaterMark = hwm;else if (isDuplex && (readableHwm || readableHwm === 0)) this.highWaterMark = readableHwm;else this.highWaterMark = defaultHwm;\n\n // cast to ints.\n this.highWaterMark = Math.floor(this.highWaterMark);\n\n // A linked list is used to store data chunks instead of an array because the\n // linked list can remove elements from the beginning faster than\n // array.shift()\n this.buffer = new BufferList();\n this.length = 0;\n this.pipes = null;\n this.pipesCount = 0;\n this.flowing = null;\n this.ended = false;\n this.endEmitted = false;\n this.reading = false;\n\n // a flag to be able to tell if the event 'readable'/'data' is emitted\n // immediately, or on a later tick. We set this to true at first, because\n // any actions that shouldn't happen until \"later\" should generally also\n // not happen before the first read call.\n this.sync = true;\n\n // whenever we return null, then we set a flag to say\n // that we're awaiting a 'readable' event emission.\n this.needReadable = false;\n this.emittedReadable = false;\n this.readableListening = false;\n this.resumeScheduled = false;\n\n // has it been destroyed\n this.destroyed = false;\n\n // Crypto is kind of old and crusty. Historically, its default string\n // encoding is 'binary' so we have to make this configurable.\n // Everything else in the universe uses 'utf8', though.\n this.defaultEncoding = options.defaultEncoding || 'utf8';\n\n // the number of writers that are awaiting a drain event in .pipe()s\n this.awaitDrain = 0;\n\n // if true, a maybeReadMore has been scheduled\n this.readingMore = false;\n\n this.decoder = null;\n this.encoding = null;\n if (options.encoding) {\n if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder;\n this.decoder = new StringDecoder(options.encoding);\n this.encoding = options.encoding;\n }\n}\n\nfunction Readable(options) {\n Duplex = Duplex || require('./_stream_duplex');\n\n if (!(this instanceof Readable)) return new Readable(options);\n\n this._readableState = new ReadableState(options, this);\n\n // legacy\n this.readable = true;\n\n if (options) {\n if (typeof options.read === 'function') this._read = options.read;\n\n if (typeof options.destroy === 'function') this._destroy = options.destroy;\n }\n\n Stream.call(this);\n}\n\nObject.defineProperty(Readable.prototype, 'destroyed', {\n get: function () {\n if (this._readableState === undefined) {\n return false;\n }\n return this._readableState.destroyed;\n },\n set: function (value) {\n // we ignore the value if the stream\n // has not been initialized yet\n if (!this._readableState) {\n return;\n }\n\n // backward compatibility, the user is explicitly\n // managing destroyed\n this._readableState.destroyed = value;\n }\n});\n\nReadable.prototype.destroy = destroyImpl.destroy;\nReadable.prototype._undestroy = destroyImpl.undestroy;\nReadable.prototype._destroy = function (err, cb) {\n this.push(null);\n cb(err);\n};\n\n// Manually shove something into the read() buffer.\n// This returns true if the highWaterMark has not been hit yet,\n// similar to how Writable.write() returns true if you should\n// write() some more.\nReadable.prototype.push = function (chunk, encoding) {\n var state = this._readableState;\n var skipChunkCheck;\n\n if (!state.objectMode) {\n if (typeof chunk === 'string') {\n encoding = encoding || state.defaultEncoding;\n if (encoding !== state.encoding) {\n chunk = Buffer.from(chunk, encoding);\n encoding = '';\n }\n skipChunkCheck = true;\n }\n } else {\n skipChunkCheck = true;\n }\n\n return readableAddChunk(this, chunk, encoding, false, skipChunkCheck);\n};\n\n// Unshift should *always* be something directly out of read()\nReadable.prototype.unshift = function (chunk) {\n return readableAddChunk(this, chunk, null, true, false);\n};\n\nfunction readableAddChunk(stream, chunk, encoding, addToFront, skipChunkCheck) {\n var state = stream._readableState;\n if (chunk === null) {\n state.reading = false;\n onEofChunk(stream, state);\n } else {\n var er;\n if (!skipChunkCheck) er = chunkInvalid(state, chunk);\n if (er) {\n stream.emit('error', er);\n } else if (state.objectMode || chunk && chunk.length > 0) {\n if (typeof chunk !== 'string' && !state.objectMode && Object.getPrototypeOf(chunk) !== Buffer.prototype) {\n chunk = _uint8ArrayToBuffer(chunk);\n }\n\n if (addToFront) {\n if (state.endEmitted) stream.emit('error', new Error('stream.unshift() after end event'));else addChunk(stream, state, chunk, true);\n } else if (state.ended) {\n stream.emit('error', new Error('stream.push() after EOF'));\n } else {\n state.reading = false;\n if (state.decoder && !encoding) {\n chunk = state.decoder.write(chunk);\n if (state.objectMode || chunk.length !== 0) addChunk(stream, state, chunk, false);else maybeReadMore(stream, state);\n } else {\n addChunk(stream, state, chunk, false);\n }\n }\n } else if (!addToFront) {\n state.reading = false;\n }\n }\n\n return needMoreData(state);\n}\n\nfunction addChunk(stream, state, chunk, addToFront) {\n if (state.flowing && state.length === 0 && !state.sync) {\n stream.emit('data', chunk);\n stream.read(0);\n } else {\n // update the buffer info.\n state.length += state.objectMode ? 1 : chunk.length;\n if (addToFront) state.buffer.unshift(chunk);else state.buffer.push(chunk);\n\n if (state.needReadable) emitReadable(stream);\n }\n maybeReadMore(stream, state);\n}\n\nfunction chunkInvalid(state, chunk) {\n var er;\n if (!_isUint8Array(chunk) && typeof chunk !== 'string' && chunk !== undefined && !state.objectMode) {\n er = new TypeError('Invalid non-string/buffer chunk');\n }\n return er;\n}\n\n// if it's past the high water mark, we can push in some more.\n// Also, if we have no data yet, we can stand some\n// more bytes. This is to work around cases where hwm=0,\n// such as the repl. Also, if the push() triggered a\n// readable event, and the user called read(largeNumber) such that\n// needReadable was set, then we ought to push more, so that another\n// 'readable' event will be triggered.\nfunction needMoreData(state) {\n return !state.ended && (state.needReadable || state.length < state.highWaterMark || state.length === 0);\n}\n\nReadable.prototype.isPaused = function () {\n return this._readableState.flowing === false;\n};\n\n// backwards compatibility.\nReadable.prototype.setEncoding = function (enc) {\n if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder;\n this._readableState.decoder = new StringDecoder(enc);\n this._readableState.encoding = enc;\n return this;\n};\n\n// Don't raise the hwm > 8MB\nvar MAX_HWM = 0x800000;\nfunction computeNewHighWaterMark(n) {\n if (n >= MAX_HWM) {\n n = MAX_HWM;\n } else {\n // Get the next highest power of 2 to prevent increasing hwm excessively in\n // tiny amounts\n n--;\n n |= n >>> 1;\n n |= n >>> 2;\n n |= n >>> 4;\n n |= n >>> 8;\n n |= n >>> 16;\n n++;\n }\n return n;\n}\n\n// This function is designed to be inlinable, so please take care when making\n// changes to the function body.\nfunction howMuchToRead(n, state) {\n if (n <= 0 || state.length === 0 && state.ended) return 0;\n if (state.objectMode) return 1;\n if (n !== n) {\n // Only flow one buffer at a time\n if (state.flowing && state.length) return state.buffer.head.data.length;else return state.length;\n }\n // If we're asking for more than the current hwm, then raise the hwm.\n if (n > state.highWaterMark) state.highWaterMark = computeNewHighWaterMark(n);\n if (n <= state.length) return n;\n // Don't have enough\n if (!state.ended) {\n state.needReadable = true;\n return 0;\n }\n return state.length;\n}\n\n// you can override either this method, or the async _read(n) below.\nReadable.prototype.read = function (n) {\n debug('read', n);\n n = parseInt(n, 10);\n var state = this._readableState;\n var nOrig = n;\n\n if (n !== 0) state.emittedReadable = false;\n\n // if we're doing read(0) to trigger a readable event, but we\n // already have a bunch of data in the buffer, then just trigger\n // the 'readable' event and move on.\n if (n === 0 && state.needReadable && (state.length >= state.highWaterMark || state.ended)) {\n debug('read: emitReadable', state.length, state.ended);\n if (state.length === 0 && state.ended) endReadable(this);else emitReadable(this);\n return null;\n }\n\n n = howMuchToRead(n, state);\n\n // if we've ended, and we're now clear, then finish it up.\n if (n === 0 && state.ended) {\n if (state.length === 0) endReadable(this);\n return null;\n }\n\n // All the actual chunk generation logic needs to be\n // *below* the call to _read. The reason is that in certain\n // synthetic stream cases, such as passthrough streams, _read\n // may be a completely synchronous operation which may change\n // the state of the read buffer, providing enough data when\n // before there was *not* enough.\n //\n // So, the steps are:\n // 1. Figure out what the state of things will be after we do\n // a read from the buffer.\n //\n // 2. If that resulting state will trigger a _read, then call _read.\n // Note that this may be asynchronous, or synchronous. Yes, it is\n // deeply ugly to write APIs this way, but that still doesn't mean\n // that the Readable class should behave improperly, as streams are\n // designed to be sync/async agnostic.\n // Take note if the _read call is sync or async (ie, if the read call\n // has returned yet), so that we know whether or not it's safe to emit\n // 'readable' etc.\n //\n // 3. Actually pull the requested chunks out of the buffer and return.\n\n // if we need a readable event, then we need to do some reading.\n var doRead = state.needReadable;\n debug('need readable', doRead);\n\n // if we currently have less than the highWaterMark, then also read some\n if (state.length === 0 || state.length - n < state.highWaterMark) {\n doRead = true;\n debug('length less than watermark', doRead);\n }\n\n // however, if we've ended, then there's no point, and if we're already\n // reading, then it's unnecessary.\n if (state.ended || state.reading) {\n doRead = false;\n debug('reading or ended', doRead);\n } else if (doRead) {\n debug('do read');\n state.reading = true;\n state.sync = true;\n // if the length is currently zero, then we *need* a readable event.\n if (state.length === 0) state.needReadable = true;\n // call internal read method\n this._read(state.highWaterMark);\n state.sync = false;\n // If _read pushed data synchronously, then `reading` will be false,\n // and we need to re-evaluate how much data we can return to the user.\n if (!state.reading) n = howMuchToRead(nOrig, state);\n }\n\n var ret;\n if (n > 0) ret = fromList(n, state);else ret = null;\n\n if (ret === null) {\n state.needReadable = true;\n n = 0;\n } else {\n state.length -= n;\n }\n\n if (state.length === 0) {\n // If we have nothing in the buffer, then we want to know\n // as soon as we *do* get something into the buffer.\n if (!state.ended) state.needReadable = true;\n\n // If we tried to read() past the EOF, then emit end on the next tick.\n if (nOrig !== n && state.ended) endReadable(this);\n }\n\n if (ret !== null) this.emit('data', ret);\n\n return ret;\n};\n\nfunction onEofChunk(stream, state) {\n if (state.ended) return;\n if (state.decoder) {\n var chunk = state.decoder.end();\n if (chunk && chunk.length) {\n state.buffer.push(chunk);\n state.length += state.objectMode ? 1 : chunk.length;\n }\n }\n state.ended = true;\n\n // emit 'readable' now to make sure it gets picked up.\n emitReadable(stream);\n}\n\n// Don't emit readable right away in sync mode, because this can trigger\n// another read() call => stack overflow. This way, it might trigger\n// a nextTick recursion warning, but that's not so bad.\nfunction emitReadable(stream) {\n var state = stream._readableState;\n state.needReadable = false;\n if (!state.emittedReadable) {\n debug('emitReadable', state.flowing);\n state.emittedReadable = true;\n if (state.sync) pna.nextTick(emitReadable_, stream);else emitReadable_(stream);\n }\n}\n\nfunction emitReadable_(stream) {\n debug('emit readable');\n stream.emit('readable');\n flow(stream);\n}\n\n// at this point, the user has presumably seen the 'readable' event,\n// and called read() to consume some data. that may have triggered\n// in turn another _read(n) call, in which case reading = true if\n// it's in progress.\n// However, if we're not ended, or reading, and the length < hwm,\n// then go ahead and try to read some more preemptively.\nfunction maybeReadMore(stream, state) {\n if (!state.readingMore) {\n state.readingMore = true;\n pna.nextTick(maybeReadMore_, stream, state);\n }\n}\n\nfunction maybeReadMore_(stream, state) {\n var len = state.length;\n while (!state.reading && !state.flowing && !state.ended && state.length < state.highWaterMark) {\n debug('maybeReadMore read 0');\n stream.read(0);\n if (len === state.length)\n // didn't get any data, stop spinning.\n break;else len = state.length;\n }\n state.readingMore = false;\n}\n\n// abstract method. to be overridden in specific implementation classes.\n// call cb(er, data) where data is <= n in length.\n// for virtual (non-string, non-buffer) streams, \"length\" is somewhat\n// arbitrary, and perhaps not very meaningful.\nReadable.prototype._read = function (n) {\n this.emit('error', new Error('_read() is not implemented'));\n};\n\nReadable.prototype.pipe = function (dest, pipeOpts) {\n var src = this;\n var state = this._readableState;\n\n switch (state.pipesCount) {\n case 0:\n state.pipes = dest;\n break;\n case 1:\n state.pipes = [state.pipes, dest];\n break;\n default:\n state.pipes.push(dest);\n break;\n }\n state.pipesCount += 1;\n debug('pipe count=%d opts=%j', state.pipesCount, pipeOpts);\n\n var doEnd = (!pipeOpts || pipeOpts.end !== false) && dest !== process.stdout && dest !== process.stderr;\n\n var endFn = doEnd ? onend : unpipe;\n if (state.endEmitted) pna.nextTick(endFn);else src.once('end', endFn);\n\n dest.on('unpipe', onunpipe);\n function onunpipe(readable, unpipeInfo) {\n debug('onunpipe');\n if (readable === src) {\n if (unpipeInfo && unpipeInfo.hasUnpiped === false) {\n unpipeInfo.hasUnpiped = true;\n cleanup();\n }\n }\n }\n\n function onend() {\n debug('onend');\n dest.end();\n }\n\n // when the dest drains, it reduces the awaitDrain counter\n // on the source. This would be more elegant with a .once()\n // handler in flow(), but adding and removing repeatedly is\n // too slow.\n var ondrain = pipeOnDrain(src);\n dest.on('drain', ondrain);\n\n var cleanedUp = false;\n function cleanup() {\n debug('cleanup');\n // cleanup event handlers once the pipe is broken\n dest.removeListener('close', onclose);\n dest.removeListener('finish', onfinish);\n dest.removeListener('drain', ondrain);\n dest.removeListener('error', onerror);\n dest.removeListener('unpipe', onunpipe);\n src.removeListener('end', onend);\n src.removeListener('end', unpipe);\n src.removeListener('data', ondata);\n\n cleanedUp = true;\n\n // if the reader is waiting for a drain event from this\n // specific writer, then it would cause it to never start\n // flowing again.\n // So, if this is awaiting a drain, then we just call it now.\n // If we don't know, then assume that we are waiting for one.\n if (state.awaitDrain && (!dest._writableState || dest._writableState.needDrain)) ondrain();\n }\n\n // If the user pushes more data while we're writing to dest then we'll end up\n // in ondata again. However, we only want to increase awaitDrain once because\n // dest will only emit one 'drain' event for the multiple writes.\n // => Introduce a guard on increasing awaitDrain.\n var increasedAwaitDrain = false;\n src.on('data', ondata);\n function ondata(chunk) {\n debug('ondata');\n increasedAwaitDrain = false;\n var ret = dest.write(chunk);\n if (false === ret && !increasedAwaitDrain) {\n // If the user unpiped during `dest.write()`, it is possible\n // to get stuck in a permanently paused state if that write\n // also returned false.\n // => Check whether `dest` is still a piping destination.\n if ((state.pipesCount === 1 && state.pipes === dest || state.pipesCount > 1 && indexOf(state.pipes, dest) !== -1) && !cleanedUp) {\n debug('false write response, pause', src._readableState.awaitDrain);\n src._readableState.awaitDrain++;\n increasedAwaitDrain = true;\n }\n src.pause();\n }\n }\n\n // if the dest has an error, then stop piping into it.\n // however, don't suppress the throwing behavior for this.\n function onerror(er) {\n debug('onerror', er);\n unpipe();\n dest.removeListener('error', onerror);\n if (EElistenerCount(dest, 'error') === 0) dest.emit('error', er);\n }\n\n // Make sure our error handler is attached before userland ones.\n prependListener(dest, 'error', onerror);\n\n // Both close and finish should trigger unpipe, but only once.\n function onclose() {\n dest.removeListener('finish', onfinish);\n unpipe();\n }\n dest.once('close', onclose);\n function onfinish() {\n debug('onfinish');\n dest.removeListener('close', onclose);\n unpipe();\n }\n dest.once('finish', onfinish);\n\n function unpipe() {\n debug('unpipe');\n src.unpipe(dest);\n }\n\n // tell the dest that it's being piped to\n dest.emit('pipe', src);\n\n // start the flow if it hasn't been started already.\n if (!state.flowing) {\n debug('pipe resume');\n src.resume();\n }\n\n return dest;\n};\n\nfunction pipeOnDrain(src) {\n return function () {\n var state = src._readableState;\n debug('pipeOnDrain', state.awaitDrain);\n if (state.awaitDrain) state.awaitDrain--;\n if (state.awaitDrain === 0 && EElistenerCount(src, 'data')) {\n state.flowing = true;\n flow(src);\n }\n };\n}\n\nReadable.prototype.unpipe = function (dest) {\n var state = this._readableState;\n var unpipeInfo = { hasUnpiped: false };\n\n // if we're not piping anywhere, then do nothing.\n if (state.pipesCount === 0) return this;\n\n // just one destination. most common case.\n if (state.pipesCount === 1) {\n // passed in one, but it's not the right one.\n if (dest && dest !== state.pipes) return this;\n\n if (!dest) dest = state.pipes;\n\n // got a match.\n state.pipes = null;\n state.pipesCount = 0;\n state.flowing = false;\n if (dest) dest.emit('unpipe', this, unpipeInfo);\n return this;\n }\n\n // slow case. multiple pipe destinations.\n\n if (!dest) {\n // remove all.\n var dests = state.pipes;\n var len = state.pipesCount;\n state.pipes = null;\n state.pipesCount = 0;\n state.flowing = false;\n\n for (var i = 0; i < len; i++) {\n dests[i].emit('unpipe', this, unpipeInfo);\n }return this;\n }\n\n // try to find the right one.\n var index = indexOf(state.pipes, dest);\n if (index === -1) return this;\n\n state.pipes.splice(index, 1);\n state.pipesCount -= 1;\n if (state.pipesCount === 1) state.pipes = state.pipes[0];\n\n dest.emit('unpipe', this, unpipeInfo);\n\n return this;\n};\n\n// set up data events if they are asked for\n// Ensure readable listeners eventually get something\nReadable.prototype.on = function (ev, fn) {\n var res = Stream.prototype.on.call(this, ev, fn);\n\n if (ev === 'data') {\n // Start flowing on next tick if stream isn't explicitly paused\n if (this._readableState.flowing !== false) this.resume();\n } else if (ev === 'readable') {\n var state = this._readableState;\n if (!state.endEmitted && !state.readableListening) {\n state.readableListening = state.needReadable = true;\n state.emittedReadable = false;\n if (!state.reading) {\n pna.nextTick(nReadingNextTick, this);\n } else if (state.length) {\n emitReadable(this);\n }\n }\n }\n\n return res;\n};\nReadable.prototype.addListener = Readable.prototype.on;\n\nfunction nReadingNextTick(self) {\n debug('readable nexttick read 0');\n self.read(0);\n}\n\n// pause() and resume() are remnants of the legacy readable stream API\n// If the user uses them, then switch into old mode.\nReadable.prototype.resume = function () {\n var state = this._readableState;\n if (!state.flowing) {\n debug('resume');\n state.flowing = true;\n resume(this, state);\n }\n return this;\n};\n\nfunction resume(stream, state) {\n if (!state.resumeScheduled) {\n state.resumeScheduled = true;\n pna.nextTick(resume_, stream, state);\n }\n}\n\nfunction resume_(stream, state) {\n if (!state.reading) {\n debug('resume read 0');\n stream.read(0);\n }\n\n state.resumeScheduled = false;\n state.awaitDrain = 0;\n stream.emit('resume');\n flow(stream);\n if (state.flowing && !state.reading) stream.read(0);\n}\n\nReadable.prototype.pause = function () {\n debug('call pause flowing=%j', this._readableState.flowing);\n if (false !== this._readableState.flowing) {\n debug('pause');\n this._readableState.flowing = false;\n this.emit('pause');\n }\n return this;\n};\n\nfunction flow(stream) {\n var state = stream._readableState;\n debug('flow', state.flowing);\n while (state.flowing && stream.read() !== null) {}\n}\n\n// wrap an old-style stream as the async data source.\n// This is *not* part of the readable stream interface.\n// It is an ugly unfortunate mess of history.\nReadable.prototype.wrap = function (stream) {\n var _this = this;\n\n var state = this._readableState;\n var paused = false;\n\n stream.on('end', function () {\n debug('wrapped end');\n if (state.decoder && !state.ended) {\n var chunk = state.decoder.end();\n if (chunk && chunk.length) _this.push(chunk);\n }\n\n _this.push(null);\n });\n\n stream.on('data', function (chunk) {\n debug('wrapped data');\n if (state.decoder) chunk = state.decoder.write(chunk);\n\n // don't skip over falsy values in objectMode\n if (state.objectMode && (chunk === null || chunk === undefined)) return;else if (!state.objectMode && (!chunk || !chunk.length)) return;\n\n var ret = _this.push(chunk);\n if (!ret) {\n paused = true;\n stream.pause();\n }\n });\n\n // proxy all the other methods.\n // important when wrapping filters and duplexes.\n for (var i in stream) {\n if (this[i] === undefined && typeof stream[i] === 'function') {\n this[i] = function (method) {\n return function () {\n return stream[method].apply(stream, arguments);\n };\n }(i);\n }\n }\n\n // proxy certain important events.\n for (var n = 0; n < kProxyEvents.length; n++) {\n stream.on(kProxyEvents[n], this.emit.bind(this, kProxyEvents[n]));\n }\n\n // when we try to consume some more bytes, simply unpause the\n // underlying stream.\n this._read = function (n) {\n debug('wrapped _read', n);\n if (paused) {\n paused = false;\n stream.resume();\n }\n };\n\n return this;\n};\n\nObject.defineProperty(Readable.prototype, 'readableHighWaterMark', {\n // making it explicit this property is not enumerable\n // because otherwise some prototype manipulation in\n // userland will fail\n enumerable: false,\n get: function () {\n return this._readableState.highWaterMark;\n }\n});\n\n// exposed for testing purposes only.\nReadable._fromList = fromList;\n\n// Pluck off n bytes from an array of buffers.\n// Length is the combined lengths of all the buffers in the list.\n// This function is designed to be inlinable, so please take care when making\n// changes to the function body.\nfunction fromList(n, state) {\n // nothing buffered\n if (state.length === 0) return null;\n\n var ret;\n if (state.objectMode) ret = state.buffer.shift();else if (!n || n >= state.length) {\n // read it all, truncate the list\n if (state.decoder) ret = state.buffer.join('');else if (state.buffer.length === 1) ret = state.buffer.head.data;else ret = state.buffer.concat(state.length);\n state.buffer.clear();\n } else {\n // read part of list\n ret = fromListPartial(n, state.buffer, state.decoder);\n }\n\n return ret;\n}\n\n// Extracts only enough buffered data to satisfy the amount requested.\n// This function is designed to be inlinable, so please take care when making\n// changes to the function body.\nfunction fromListPartial(n, list, hasStrings) {\n var ret;\n if (n < list.head.data.length) {\n // slice is the same for buffers and strings\n ret = list.head.data.slice(0, n);\n list.head.data = list.head.data.slice(n);\n } else if (n === list.head.data.length) {\n // first chunk is a perfect match\n ret = list.shift();\n } else {\n // result spans more than one buffer\n ret = hasStrings ? copyFromBufferString(n, list) : copyFromBuffer(n, list);\n }\n return ret;\n}\n\n// Copies a specified amount of characters from the list of buffered data\n// chunks.\n// This function is designed to be inlinable, so please take care when making\n// changes to the function body.\nfunction copyFromBufferString(n, list) {\n var p = list.head;\n var c = 1;\n var ret = p.data;\n n -= ret.length;\n while (p = p.next) {\n var str = p.data;\n var nb = n > str.length ? str.length : n;\n if (nb === str.length) ret += str;else ret += str.slice(0, n);\n n -= nb;\n if (n === 0) {\n if (nb === str.length) {\n ++c;\n if (p.next) list.head = p.next;else list.head = list.tail = null;\n } else {\n list.head = p;\n p.data = str.slice(nb);\n }\n break;\n }\n ++c;\n }\n list.length -= c;\n return ret;\n}\n\n// Copies a specified amount of bytes from the list of buffered data chunks.\n// This function is designed to be inlinable, so please take care when making\n// changes to the function body.\nfunction copyFromBuffer(n, list) {\n var ret = Buffer.allocUnsafe(n);\n var p = list.head;\n var c = 1;\n p.data.copy(ret);\n n -= p.data.length;\n while (p = p.next) {\n var buf = p.data;\n var nb = n > buf.length ? buf.length : n;\n buf.copy(ret, ret.length - n, 0, nb);\n n -= nb;\n if (n === 0) {\n if (nb === buf.length) {\n ++c;\n if (p.next) list.head = p.next;else list.head = list.tail = null;\n } else {\n list.head = p;\n p.data = buf.slice(nb);\n }\n break;\n }\n ++c;\n }\n list.length -= c;\n return ret;\n}\n\nfunction endReadable(stream) {\n var state = stream._readableState;\n\n // If we get here before consuming all the bytes, then that is a\n // bug in node. Should never happen.\n if (state.length > 0) throw new Error('\"endReadable()\" called on non-empty stream');\n\n if (!state.endEmitted) {\n state.ended = true;\n pna.nextTick(endReadableNT, state, stream);\n }\n}\n\nfunction endReadableNT(state, stream) {\n // Check that we didn't get one last unshift.\n if (!state.endEmitted && state.length === 0) {\n state.endEmitted = true;\n stream.readable = false;\n stream.emit('end');\n }\n}\n\nfunction indexOf(xs, x) {\n for (var i = 0, l = xs.length; i < l; i++) {\n if (xs[i] === x) return i;\n }\n return -1;\n}"},"lineCount":null}},"error":null,"hash":"51c6b18d47dedd5a4bd7dec3298eee15","cacheData":{"env":{}}}