| Index: tools/vulcanize/node_modules/vulcanize/node_modules/cheerio/node_modules/htmlparser2/node_modules/readable-stream/lib/_stream_readable.js
|
| diff --git a/tools/vulcanize/node_modules/vulcanize/node_modules/cheerio/node_modules/htmlparser2/node_modules/readable-stream/lib/_stream_readable.js b/tools/vulcanize/node_modules/vulcanize/node_modules/cheerio/node_modules/htmlparser2/node_modules/readable-stream/lib/_stream_readable.js
|
| new file mode 100644
|
| index 0000000000000000000000000000000000000000..3c9da084a22ae2a50a7c78ba4bb31f87eb2a9e7d
|
| --- /dev/null
|
| +++ b/tools/vulcanize/node_modules/vulcanize/node_modules/cheerio/node_modules/htmlparser2/node_modules/readable-stream/lib/_stream_readable.js
|
| @@ -0,0 +1,927 @@
|
| +// Copyright Joyent, Inc. and other Node contributors.
|
| +//
|
| +// Permission is hereby granted, free of charge, to any person obtaining a
|
| +// copy of this software and associated documentation files (the
|
| +// "Software"), to deal in the Software without restriction, including
|
| +// without limitation the rights to use, copy, modify, merge, publish,
|
| +// distribute, sublicense, and/or sell copies of the Software, and to permit
|
| +// persons to whom the Software is furnished to do so, subject to the
|
| +// following conditions:
|
| +//
|
| +// The above copyright notice and this permission notice shall be included
|
| +// in all copies or substantial portions of the Software.
|
| +//
|
| +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
| +// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
| +// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
|
| +// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
|
| +// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
|
| +// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
|
| +// USE OR OTHER DEALINGS IN THE SOFTWARE.
|
| +
|
| +module.exports = Readable;
|
| +Readable.ReadableState = ReadableState;
|
| +
|
| +var EE = require('events').EventEmitter;
|
| +if (!EE.listenerCount) EE.listenerCount = function(emitter, type) {
|
| + return emitter.listeners(type).length;
|
| +};
|
| +var Stream = require('stream');
|
| +var util = require('util');
|
| +var StringDecoder;
|
| +
|
| +util.inherits(Readable, Stream);
|
| +
|
| +function ReadableState(options, stream) {
|
| + options = options || {};
|
| +
|
| + // the point at which it stops calling _read() to fill the buffer
|
| + // Note: 0 is a valid value, means "don't call _read preemptively ever"
|
| + var hwm = options.highWaterMark;
|
| + this.highWaterMark = (hwm || hwm === 0) ? hwm : 16 * 1024;
|
| +
|
| + // cast to ints.
|
| + this.highWaterMark = ~~this.highWaterMark;
|
| +
|
| + this.buffer = [];
|
| + this.length = 0;
|
| + this.pipes = null;
|
| + this.pipesCount = 0;
|
| + this.flowing = false;
|
| + this.ended = false;
|
| + this.endEmitted = false;
|
| + this.reading = false;
|
| +
|
| + // In streams that never have any data, and do push(null) right away,
|
| + // the consumer can miss the 'end' event if they do some I/O before
|
| + // consuming the stream. So, we don't emit('end') until some reading
|
| + // happens.
|
| + this.calledRead = false;
|
| +
|
| + // a flag to be able to tell if the onwrite cb is called immediately,
|
| + // or on a later tick. We set this to true at first, becuase any
|
| + // actions that shouldn't happen until "later" should generally also
|
| + // not happen before the first write call.
|
| + this.sync = true;
|
| +
|
| + // whenever we return null, then we set a flag to say
|
| + // that we're awaiting a 'readable' event emission.
|
| + this.needReadable = false;
|
| + this.emittedReadable = false;
|
| + this.readableListening = false;
|
| +
|
| +
|
| + // object stream flag. Used to make read(n) ignore n and to
|
| + // make all the buffer merging and length checks go away
|
| + this.objectMode = !!options.objectMode;
|
| +
|
| + // Crypto is kind of old and crusty. Historically, its default string
|
| + // encoding is 'binary' so we have to make this configurable.
|
| + // Everything else in the universe uses 'utf8', though.
|
| + this.defaultEncoding = options.defaultEncoding || 'utf8';
|
| +
|
| + // when piping, we only care about 'readable' events that happen
|
| + // after read()ing all the bytes and not getting any pushback.
|
| + this.ranOut = false;
|
| +
|
| + // the number of writers that are awaiting a drain event in .pipe()s
|
| + this.awaitDrain = 0;
|
| +
|
| + // if true, a maybeReadMore has been scheduled
|
| + this.readingMore = false;
|
| +
|
| + this.decoder = null;
|
| + this.encoding = null;
|
| + if (options.encoding) {
|
| + if (!StringDecoder)
|
| + StringDecoder = require('string_decoder').StringDecoder;
|
| + this.decoder = new StringDecoder(options.encoding);
|
| + this.encoding = options.encoding;
|
| + }
|
| +}
|
| +
|
| +function Readable(options) {
|
| + if (!(this instanceof Readable))
|
| + return new Readable(options);
|
| +
|
| + this._readableState = new ReadableState(options, this);
|
| +
|
| + // legacy
|
| + this.readable = true;
|
| +
|
| + Stream.call(this);
|
| +}
|
| +
|
| +// Manually shove something into the read() buffer.
|
| +// This returns true if the highWaterMark has not been hit yet,
|
| +// similar to how Writable.write() returns true if you should
|
| +// write() some more.
|
| +Readable.prototype.push = function(chunk, encoding) {
|
| + var state = this._readableState;
|
| +
|
| + if (typeof chunk === 'string' && !state.objectMode) {
|
| + encoding = encoding || state.defaultEncoding;
|
| + if (encoding !== state.encoding) {
|
| + chunk = new Buffer(chunk, encoding);
|
| + encoding = '';
|
| + }
|
| + }
|
| +
|
| + return readableAddChunk(this, state, chunk, encoding, false);
|
| +};
|
| +
|
| +// Unshift should *always* be something directly out of read()
|
| +Readable.prototype.unshift = function(chunk) {
|
| + var state = this._readableState;
|
| + return readableAddChunk(this, state, chunk, '', true);
|
| +};
|
| +
|
| +function readableAddChunk(stream, state, chunk, encoding, addToFront) {
|
| + var er = chunkInvalid(state, chunk);
|
| + if (er) {
|
| + stream.emit('error', er);
|
| + } else if (chunk === null || chunk === undefined) {
|
| + state.reading = false;
|
| + if (!state.ended)
|
| + onEofChunk(stream, state);
|
| + } else if (state.objectMode || chunk && chunk.length > 0) {
|
| + if (state.ended && !addToFront) {
|
| + var e = new Error('stream.push() after EOF');
|
| + stream.emit('error', e);
|
| + } else if (state.endEmitted && addToFront) {
|
| + var e = new Error('stream.unshift() after end event');
|
| + stream.emit('error', e);
|
| + } else {
|
| + if (state.decoder && !addToFront && !encoding)
|
| + chunk = state.decoder.write(chunk);
|
| +
|
| + // update the buffer info.
|
| + state.length += state.objectMode ? 1 : chunk.length;
|
| + if (addToFront) {
|
| + state.buffer.unshift(chunk);
|
| + } else {
|
| + state.reading = false;
|
| + state.buffer.push(chunk);
|
| + }
|
| +
|
| + if (state.needReadable)
|
| + emitReadable(stream);
|
| +
|
| + maybeReadMore(stream, state);
|
| + }
|
| + } else if (!addToFront) {
|
| + state.reading = false;
|
| + }
|
| +
|
| + return needMoreData(state);
|
| +}
|
| +
|
| +
|
| +
|
| +// if it's past the high water mark, we can push in some more.
|
| +// Also, if we have no data yet, we can stand some
|
| +// more bytes. This is to work around cases where hwm=0,
|
| +// such as the repl. Also, if the push() triggered a
|
| +// readable event, and the user called read(largeNumber) such that
|
| +// needReadable was set, then we ought to push more, so that another
|
| +// 'readable' event will be triggered.
|
| +function needMoreData(state) {
|
| + return !state.ended &&
|
| + (state.needReadable ||
|
| + state.length < state.highWaterMark ||
|
| + state.length === 0);
|
| +}
|
| +
|
| +// backwards compatibility.
|
| +Readable.prototype.setEncoding = function(enc) {
|
| + if (!StringDecoder)
|
| + StringDecoder = require('string_decoder').StringDecoder;
|
| + this._readableState.decoder = new StringDecoder(enc);
|
| + this._readableState.encoding = enc;
|
| +};
|
| +
|
| +// Don't raise the hwm > 128MB
|
| +var MAX_HWM = 0x800000;
|
| +function roundUpToNextPowerOf2(n) {
|
| + if (n >= MAX_HWM) {
|
| + n = MAX_HWM;
|
| + } else {
|
| + // Get the next highest power of 2
|
| + n--;
|
| + for (var p = 1; p < 32; p <<= 1) n |= n >> p;
|
| + n++;
|
| + }
|
| + return n;
|
| +}
|
| +
|
| +function howMuchToRead(n, state) {
|
| + if (state.length === 0 && state.ended)
|
| + return 0;
|
| +
|
| + if (state.objectMode)
|
| + return n === 0 ? 0 : 1;
|
| +
|
| + if (isNaN(n) || n === null) {
|
| + // only flow one buffer at a time
|
| + if (state.flowing && state.buffer.length)
|
| + return state.buffer[0].length;
|
| + else
|
| + return state.length;
|
| + }
|
| +
|
| + if (n <= 0)
|
| + return 0;
|
| +
|
| + // If we're asking for more than the target buffer level,
|
| + // then raise the water mark. Bump up to the next highest
|
| + // power of 2, to prevent increasing it excessively in tiny
|
| + // amounts.
|
| + if (n > state.highWaterMark)
|
| + state.highWaterMark = roundUpToNextPowerOf2(n);
|
| +
|
| + // don't have that much. return null, unless we've ended.
|
| + if (n > state.length) {
|
| + if (!state.ended) {
|
| + state.needReadable = true;
|
| + return 0;
|
| + } else
|
| + return state.length;
|
| + }
|
| +
|
| + return n;
|
| +}
|
| +
|
| +// you can override either this method, or the async _read(n) below.
|
| +Readable.prototype.read = function(n) {
|
| + var state = this._readableState;
|
| + state.calledRead = true;
|
| + var nOrig = n;
|
| +
|
| + if (typeof n !== 'number' || n > 0)
|
| + state.emittedReadable = false;
|
| +
|
| + // if we're doing read(0) to trigger a readable event, but we
|
| + // already have a bunch of data in the buffer, then just trigger
|
| + // the 'readable' event and move on.
|
| + if (n === 0 &&
|
| + state.needReadable &&
|
| + (state.length >= state.highWaterMark || state.ended)) {
|
| + emitReadable(this);
|
| + return null;
|
| + }
|
| +
|
| + n = howMuchToRead(n, state);
|
| +
|
| + // if we've ended, and we're now clear, then finish it up.
|
| + if (n === 0 && state.ended) {
|
| + if (state.length === 0)
|
| + endReadable(this);
|
| + return null;
|
| + }
|
| +
|
| + // All the actual chunk generation logic needs to be
|
| + // *below* the call to _read. The reason is that in certain
|
| + // synthetic stream cases, such as passthrough streams, _read
|
| + // may be a completely synchronous operation which may change
|
| + // the state of the read buffer, providing enough data when
|
| + // before there was *not* enough.
|
| + //
|
| + // So, the steps are:
|
| + // 1. Figure out what the state of things will be after we do
|
| + // a read from the buffer.
|
| + //
|
| + // 2. If that resulting state will trigger a _read, then call _read.
|
| + // Note that this may be asynchronous, or synchronous. Yes, it is
|
| + // deeply ugly to write APIs this way, but that still doesn't mean
|
| + // that the Readable class should behave improperly, as streams are
|
| + // designed to be sync/async agnostic.
|
| + // Take note if the _read call is sync or async (ie, if the read call
|
| + // has returned yet), so that we know whether or not it's safe to emit
|
| + // 'readable' etc.
|
| + //
|
| + // 3. Actually pull the requested chunks out of the buffer and return.
|
| +
|
| + // if we need a readable event, then we need to do some reading.
|
| + var doRead = state.needReadable;
|
| +
|
| + // if we currently have less than the highWaterMark, then also read some
|
| + if (state.length - n <= state.highWaterMark)
|
| + doRead = true;
|
| +
|
| + // however, if we've ended, then there's no point, and if we're already
|
| + // reading, then it's unnecessary.
|
| + if (state.ended || state.reading)
|
| + doRead = false;
|
| +
|
| + if (doRead) {
|
| + state.reading = true;
|
| + state.sync = true;
|
| + // if the length is currently zero, then we *need* a readable event.
|
| + if (state.length === 0)
|
| + state.needReadable = true;
|
| + // call internal read method
|
| + this._read(state.highWaterMark);
|
| + state.sync = false;
|
| + }
|
| +
|
| + // If _read called its callback synchronously, then `reading`
|
| + // will be false, and we need to re-evaluate how much data we
|
| + // can return to the user.
|
| + if (doRead && !state.reading)
|
| + n = howMuchToRead(nOrig, state);
|
| +
|
| + var ret;
|
| + if (n > 0)
|
| + ret = fromList(n, state);
|
| + else
|
| + ret = null;
|
| +
|
| + if (ret === null) {
|
| + state.needReadable = true;
|
| + n = 0;
|
| + }
|
| +
|
| + state.length -= n;
|
| +
|
| + // If we have nothing in the buffer, then we want to know
|
| + // as soon as we *do* get something into the buffer.
|
| + if (state.length === 0 && !state.ended)
|
| + state.needReadable = true;
|
| +
|
| + // If we happened to read() exactly the remaining amount in the
|
| + // buffer, and the EOF has been seen at this point, then make sure
|
| + // that we emit 'end' on the very next tick.
|
| + if (state.ended && !state.endEmitted && state.length === 0)
|
| + endReadable(this);
|
| +
|
| + return ret;
|
| +};
|
| +
|
| +function chunkInvalid(state, chunk) {
|
| + var er = null;
|
| + if (!Buffer.isBuffer(chunk) &&
|
| + 'string' !== typeof chunk &&
|
| + chunk !== null &&
|
| + chunk !== undefined &&
|
| + !state.objectMode &&
|
| + !er) {
|
| + er = new TypeError('Invalid non-string/buffer chunk');
|
| + }
|
| + return er;
|
| +}
|
| +
|
| +
|
| +function onEofChunk(stream, state) {
|
| + if (state.decoder && !state.ended) {
|
| + var chunk = state.decoder.end();
|
| + if (chunk && chunk.length) {
|
| + state.buffer.push(chunk);
|
| + state.length += state.objectMode ? 1 : chunk.length;
|
| + }
|
| + }
|
| + state.ended = true;
|
| +
|
| + // if we've ended and we have some data left, then emit
|
| + // 'readable' now to make sure it gets picked up.
|
| + if (state.length > 0)
|
| + emitReadable(stream);
|
| + else
|
| + endReadable(stream);
|
| +}
|
| +
|
| +// Don't emit readable right away in sync mode, because this can trigger
|
| +// another read() call => stack overflow. This way, it might trigger
|
| +// a nextTick recursion warning, but that's not so bad.
|
| +function emitReadable(stream) {
|
| + var state = stream._readableState;
|
| + state.needReadable = false;
|
| + if (state.emittedReadable)
|
| + return;
|
| +
|
| + state.emittedReadable = true;
|
| + if (state.sync)
|
| + process.nextTick(function() {
|
| + emitReadable_(stream);
|
| + });
|
| + else
|
| + emitReadable_(stream);
|
| +}
|
| +
|
| +function emitReadable_(stream) {
|
| + stream.emit('readable');
|
| +}
|
| +
|
| +
|
| +// at this point, the user has presumably seen the 'readable' event,
|
| +// and called read() to consume some data. that may have triggered
|
| +// in turn another _read(n) call, in which case reading = true if
|
| +// it's in progress.
|
| +// However, if we're not ended, or reading, and the length < hwm,
|
| +// then go ahead and try to read some more preemptively.
|
| +function maybeReadMore(stream, state) {
|
| + if (!state.readingMore) {
|
| + state.readingMore = true;
|
| + process.nextTick(function() {
|
| + maybeReadMore_(stream, state);
|
| + });
|
| + }
|
| +}
|
| +
|
| +function maybeReadMore_(stream, state) {
|
| + var len = state.length;
|
| + while (!state.reading && !state.flowing && !state.ended &&
|
| + state.length < state.highWaterMark) {
|
| + stream.read(0);
|
| + if (len === state.length)
|
| + // didn't get any data, stop spinning.
|
| + break;
|
| + else
|
| + len = state.length;
|
| + }
|
| + state.readingMore = false;
|
| +}
|
| +
|
| +// abstract method. to be overridden in specific implementation classes.
|
| +// call cb(er, data) where data is <= n in length.
|
| +// for virtual (non-string, non-buffer) streams, "length" is somewhat
|
| +// arbitrary, and perhaps not very meaningful.
|
| +Readable.prototype._read = function(n) {
|
| + this.emit('error', new Error('not implemented'));
|
| +};
|
| +
|
| +Readable.prototype.pipe = function(dest, pipeOpts) {
|
| + var src = this;
|
| + var state = this._readableState;
|
| +
|
| + switch (state.pipesCount) {
|
| + case 0:
|
| + state.pipes = dest;
|
| + break;
|
| + case 1:
|
| + state.pipes = [state.pipes, dest];
|
| + break;
|
| + default:
|
| + state.pipes.push(dest);
|
| + break;
|
| + }
|
| + state.pipesCount += 1;
|
| +
|
| + var doEnd = (!pipeOpts || pipeOpts.end !== false) &&
|
| + dest !== process.stdout &&
|
| + dest !== process.stderr;
|
| +
|
| + var endFn = doEnd ? onend : cleanup;
|
| + if (state.endEmitted)
|
| + process.nextTick(endFn);
|
| + else
|
| + src.once('end', endFn);
|
| +
|
| + dest.on('unpipe', onunpipe);
|
| + function onunpipe(readable) {
|
| + if (readable !== src) return;
|
| + cleanup();
|
| + }
|
| +
|
| + function onend() {
|
| + dest.end();
|
| + }
|
| +
|
| + // when the dest drains, it reduces the awaitDrain counter
|
| + // on the source. This would be more elegant with a .once()
|
| + // handler in flow(), but adding and removing repeatedly is
|
| + // too slow.
|
| + var ondrain = pipeOnDrain(src);
|
| + dest.on('drain', ondrain);
|
| +
|
| + function cleanup() {
|
| + // cleanup event handlers once the pipe is broken
|
| + dest.removeListener('close', onclose);
|
| + dest.removeListener('finish', onfinish);
|
| + dest.removeListener('drain', ondrain);
|
| + dest.removeListener('error', onerror);
|
| + dest.removeListener('unpipe', onunpipe);
|
| + src.removeListener('end', onend);
|
| + src.removeListener('end', cleanup);
|
| +
|
| + // if the reader is waiting for a drain event from this
|
| + // specific writer, then it would cause it to never start
|
| + // flowing again.
|
| + // So, if this is awaiting a drain, then we just call it now.
|
| + // If we don't know, then assume that we are waiting for one.
|
| + if (!dest._writableState || dest._writableState.needDrain)
|
| + ondrain();
|
| + }
|
| +
|
| + // if the dest has an error, then stop piping into it.
|
| + // however, don't suppress the throwing behavior for this.
|
| + function onerror(er) {
|
| + unpipe();
|
| + dest.removeListener('error', onerror);
|
| + if (EE.listenerCount(dest, 'error') === 0)
|
| + dest.emit('error', er);
|
| + }
|
| + // This is a brutally ugly hack to make sure that our error handler
|
| + // is attached before any userland ones. NEVER DO THIS.
|
| + if (!dest._events.error)
|
| + dest.on('error', onerror);
|
| + else if (Array.isArray(dest._events.error))
|
| + dest._events.error.unshift(onerror);
|
| + else
|
| + dest._events.error = [onerror, dest._events.error];
|
| +
|
| +
|
| +
|
| + // Both close and finish should trigger unpipe, but only once.
|
| + function onclose() {
|
| + dest.removeListener('finish', onfinish);
|
| + unpipe();
|
| + }
|
| + dest.once('close', onclose);
|
| + function onfinish() {
|
| + dest.removeListener('close', onclose);
|
| + unpipe();
|
| + }
|
| + dest.once('finish', onfinish);
|
| +
|
| + function unpipe() {
|
| + src.unpipe(dest);
|
| + }
|
| +
|
| + // tell the dest that it's being piped to
|
| + dest.emit('pipe', src);
|
| +
|
| + // start the flow if it hasn't been started already.
|
| + if (!state.flowing) {
|
| + // the handler that waits for readable events after all
|
| + // the data gets sucked out in flow.
|
| + // This would be easier to follow with a .once() handler
|
| + // in flow(), but that is too slow.
|
| + this.on('readable', pipeOnReadable);
|
| +
|
| + state.flowing = true;
|
| + process.nextTick(function() {
|
| + flow(src);
|
| + });
|
| + }
|
| +
|
| + return dest;
|
| +};
|
| +
|
| +function pipeOnDrain(src) {
|
| + return function() {
|
| + var dest = this;
|
| + var state = src._readableState;
|
| + state.awaitDrain--;
|
| + if (state.awaitDrain === 0)
|
| + flow(src);
|
| + };
|
| +}
|
| +
|
| +function flow(src) {
|
| + var state = src._readableState;
|
| + var chunk;
|
| + state.awaitDrain = 0;
|
| +
|
| + function write(dest, i, list) {
|
| + var written = dest.write(chunk);
|
| + if (false === written) {
|
| + state.awaitDrain++;
|
| + }
|
| + }
|
| +
|
| + while (state.pipesCount && null !== (chunk = src.read())) {
|
| +
|
| + if (state.pipesCount === 1)
|
| + write(state.pipes, 0, null);
|
| + else
|
| + state.pipes.forEach(write);
|
| +
|
| + src.emit('data', chunk);
|
| +
|
| + // if anyone needs a drain, then we have to wait for that.
|
| + if (state.awaitDrain > 0)
|
| + return;
|
| + }
|
| +
|
| + // if every destination was unpiped, either before entering this
|
| + // function, or in the while loop, then stop flowing.
|
| + //
|
| + // NB: This is a pretty rare edge case.
|
| + if (state.pipesCount === 0) {
|
| + state.flowing = false;
|
| +
|
| + // if there were data event listeners added, then switch to old mode.
|
| + if (EE.listenerCount(src, 'data') > 0)
|
| + emitDataEvents(src);
|
| + return;
|
| + }
|
| +
|
| + // at this point, no one needed a drain, so we just ran out of data
|
| + // on the next readable event, start it over again.
|
| + state.ranOut = true;
|
| +}
|
| +
|
| +function pipeOnReadable() {
|
| + if (this._readableState.ranOut) {
|
| + this._readableState.ranOut = false;
|
| + flow(this);
|
| + }
|
| +}
|
| +
|
| +
|
| +Readable.prototype.unpipe = function(dest) {
|
| + var state = this._readableState;
|
| +
|
| + // if we're not piping anywhere, then do nothing.
|
| + if (state.pipesCount === 0)
|
| + return this;
|
| +
|
| + // just one destination. most common case.
|
| + if (state.pipesCount === 1) {
|
| + // passed in one, but it's not the right one.
|
| + if (dest && dest !== state.pipes)
|
| + return this;
|
| +
|
| + if (!dest)
|
| + dest = state.pipes;
|
| +
|
| + // got a match.
|
| + state.pipes = null;
|
| + state.pipesCount = 0;
|
| + this.removeListener('readable', pipeOnReadable);
|
| + state.flowing = false;
|
| + if (dest)
|
| + dest.emit('unpipe', this);
|
| + return this;
|
| + }
|
| +
|
| + // slow case. multiple pipe destinations.
|
| +
|
| + if (!dest) {
|
| + // remove all.
|
| + var dests = state.pipes;
|
| + var len = state.pipesCount;
|
| + state.pipes = null;
|
| + state.pipesCount = 0;
|
| + this.removeListener('readable', pipeOnReadable);
|
| + state.flowing = false;
|
| +
|
| + for (var i = 0; i < len; i++)
|
| + dests[i].emit('unpipe', this);
|
| + return this;
|
| + }
|
| +
|
| + // try to find the right one.
|
| + var i = state.pipes.indexOf(dest);
|
| + if (i === -1)
|
| + return this;
|
| +
|
| + state.pipes.splice(i, 1);
|
| + state.pipesCount -= 1;
|
| + if (state.pipesCount === 1)
|
| + state.pipes = state.pipes[0];
|
| +
|
| + dest.emit('unpipe', this);
|
| +
|
| + return this;
|
| +};
|
| +
|
| +// set up data events if they are asked for
|
| +// Ensure readable listeners eventually get something
|
| +Readable.prototype.on = function(ev, fn) {
|
| + var res = Stream.prototype.on.call(this, ev, fn);
|
| +
|
| + if (ev === 'data' && !this._readableState.flowing)
|
| + emitDataEvents(this);
|
| +
|
| + if (ev === 'readable' && this.readable) {
|
| + var state = this._readableState;
|
| + if (!state.readableListening) {
|
| + state.readableListening = true;
|
| + state.emittedReadable = false;
|
| + state.needReadable = true;
|
| + if (!state.reading) {
|
| + this.read(0);
|
| + } else if (state.length) {
|
| + emitReadable(this, state);
|
| + }
|
| + }
|
| + }
|
| +
|
| + return res;
|
| +};
|
| +Readable.prototype.addListener = Readable.prototype.on;
|
| +
|
| +// pause() and resume() are remnants of the legacy readable stream API
|
| +// If the user uses them, then switch into old mode.
|
| +Readable.prototype.resume = function() {
|
| + emitDataEvents(this);
|
| + this.read(0);
|
| + this.emit('resume');
|
| +};
|
| +
|
| +Readable.prototype.pause = function() {
|
| + emitDataEvents(this, true);
|
| + this.emit('pause');
|
| +};
|
| +
|
| +function emitDataEvents(stream, startPaused) {
|
| + var state = stream._readableState;
|
| +
|
| + if (state.flowing) {
|
| + // https://github.com/isaacs/readable-stream/issues/16
|
| + throw new Error('Cannot switch to old mode now.');
|
| + }
|
| +
|
| + var paused = startPaused || false;
|
| + var readable = false;
|
| +
|
| + // convert to an old-style stream.
|
| + stream.readable = true;
|
| + stream.pipe = Stream.prototype.pipe;
|
| + stream.on = stream.addListener = Stream.prototype.on;
|
| +
|
| + stream.on('readable', function() {
|
| + readable = true;
|
| +
|
| + var c;
|
| + while (!paused && (null !== (c = stream.read())))
|
| + stream.emit('data', c);
|
| +
|
| + if (c === null) {
|
| + readable = false;
|
| + stream._readableState.needReadable = true;
|
| + }
|
| + });
|
| +
|
| + stream.pause = function() {
|
| + paused = true;
|
| + this.emit('pause');
|
| + };
|
| +
|
| + stream.resume = function() {
|
| + paused = false;
|
| + if (readable)
|
| + process.nextTick(function() {
|
| + stream.emit('readable');
|
| + });
|
| + else
|
| + this.read(0);
|
| + this.emit('resume');
|
| + };
|
| +
|
| + // now make it start, just in case it hadn't already.
|
| + stream.emit('readable');
|
| +}
|
| +
|
| +// wrap an old-style stream as the async data source.
|
| +// This is *not* part of the readable stream interface.
|
| +// It is an ugly unfortunate mess of history.
|
| +Readable.prototype.wrap = function(stream) {
|
| + var state = this._readableState;
|
| + var paused = false;
|
| +
|
| + var self = this;
|
| + stream.on('end', function() {
|
| + if (state.decoder && !state.ended) {
|
| + var chunk = state.decoder.end();
|
| + if (chunk && chunk.length)
|
| + self.push(chunk);
|
| + }
|
| +
|
| + self.push(null);
|
| + });
|
| +
|
| + stream.on('data', function(chunk) {
|
| + if (state.decoder)
|
| + chunk = state.decoder.write(chunk);
|
| + if (!chunk || !state.objectMode && !chunk.length)
|
| + return;
|
| +
|
| + var ret = self.push(chunk);
|
| + if (!ret) {
|
| + paused = true;
|
| + stream.pause();
|
| + }
|
| + });
|
| +
|
| + // proxy all the other methods.
|
| + // important when wrapping filters and duplexes.
|
| + for (var i in stream) {
|
| + if (typeof stream[i] === 'function' &&
|
| + typeof this[i] === 'undefined') {
|
| + this[i] = function(method) { return function() {
|
| + return stream[method].apply(stream, arguments);
|
| + }}(i);
|
| + }
|
| + }
|
| +
|
| + // proxy certain important events.
|
| + var events = ['error', 'close', 'destroy', 'pause', 'resume'];
|
| + events.forEach(function(ev) {
|
| + stream.on(ev, self.emit.bind(self, ev));
|
| + });
|
| +
|
| + // when we try to consume some more bytes, simply unpause the
|
| + // underlying stream.
|
| + self._read = function(n) {
|
| + if (paused) {
|
| + paused = false;
|
| + stream.resume();
|
| + }
|
| + };
|
| +
|
| + return self;
|
| +};
|
| +
|
| +
|
| +
|
| +// exposed for testing purposes only.
|
| +Readable._fromList = fromList;
|
| +
|
| +// Pluck off n bytes from an array of buffers.
|
| +// Length is the combined lengths of all the buffers in the list.
|
| +function fromList(n, state) {
|
| + var list = state.buffer;
|
| + var length = state.length;
|
| + var stringMode = !!state.decoder;
|
| + var objectMode = !!state.objectMode;
|
| + var ret;
|
| +
|
| + // nothing in the list, definitely empty.
|
| + if (list.length === 0)
|
| + return null;
|
| +
|
| + if (length === 0)
|
| + ret = null;
|
| + else if (objectMode)
|
| + ret = list.shift();
|
| + else if (!n || n >= length) {
|
| + // read it all, truncate the array.
|
| + if (stringMode)
|
| + ret = list.join('');
|
| + else
|
| + ret = Buffer.concat(list, length);
|
| + list.length = 0;
|
| + } else {
|
| + // read just some of it.
|
| + if (n < list[0].length) {
|
| + // just take a part of the first list item.
|
| + // slice is the same for buffers and strings.
|
| + var buf = list[0];
|
| + ret = buf.slice(0, n);
|
| + list[0] = buf.slice(n);
|
| + } else if (n === list[0].length) {
|
| + // first list is a perfect match
|
| + ret = list.shift();
|
| + } else {
|
| + // complex case.
|
| + // we have enough to cover it, but it spans past the first buffer.
|
| + if (stringMode)
|
| + ret = '';
|
| + else
|
| + ret = new Buffer(n);
|
| +
|
| + var c = 0;
|
| + for (var i = 0, l = list.length; i < l && c < n; i++) {
|
| + var buf = list[0];
|
| + var cpy = Math.min(n - c, buf.length);
|
| +
|
| + if (stringMode)
|
| + ret += buf.slice(0, cpy);
|
| + else
|
| + buf.copy(ret, c, 0, cpy);
|
| +
|
| + if (cpy < buf.length)
|
| + list[0] = buf.slice(cpy);
|
| + else
|
| + list.shift();
|
| +
|
| + c += cpy;
|
| + }
|
| + }
|
| + }
|
| +
|
| + return ret;
|
| +}
|
| +
|
| +function endReadable(stream) {
|
| + var state = stream._readableState;
|
| +
|
| + // If we get here before consuming all the bytes, then that is a
|
| + // bug in node. Should never happen.
|
| + if (state.length > 0)
|
| + throw new Error('endReadable called on non-empty stream');
|
| +
|
| + if (!state.endEmitted && state.calledRead) {
|
| + state.ended = true;
|
| + process.nextTick(function() {
|
| + // Check that we didn't get one last unshift.
|
| + if (!state.endEmitted && state.length === 0) {
|
| + state.endEmitted = true;
|
| + stream.readable = false;
|
| + stream.emit('end');
|
| + }
|
| + });
|
| + }
|
| +}
|
|
|
Chromium Code Reviews
