diff options
Diffstat (limited to 'deps/node/deps/npm/node_modules/duplexify/index.js')
| -rw-r--r-- | deps/node/deps/npm/node_modules/duplexify/index.js | 235 |
1 files changed, 0 insertions, 235 deletions
diff --git a/deps/node/deps/npm/node_modules/duplexify/index.js b/deps/node/deps/npm/node_modules/duplexify/index.js deleted file mode 100644 index ad36962c..00000000 --- a/deps/node/deps/npm/node_modules/duplexify/index.js +++ /dev/null @@ -1,235 +0,0 @@ -var stream = require('readable-stream') -var eos = require('end-of-stream') -var inherits = require('inherits') -var shift = require('stream-shift') - -var SIGNAL_FLUSH = (Buffer.from && Buffer.from !== Uint8Array.from) - ? Buffer.from([0]) - : new Buffer([0]) - -var onuncork = function(self, fn) { - if (self._corked) self.once('uncork', fn) - else fn() -} - -var autoDestroy = function (self, err) { - if (self._autoDestroy) self.destroy(err) -} - -var destroyer = function(self, end) { - return function(err) { - if (err) autoDestroy(self, err.message === 'premature close' ? null : err) - else if (end && !self._ended) self.end() - } -} - -var end = function(ws, fn) { - if (!ws) return fn() - if (ws._writableState && ws._writableState.finished) return fn() - if (ws._writableState) return ws.end(fn) - ws.end() - fn() -} - -var toStreams2 = function(rs) { - return new (stream.Readable)({objectMode:true, highWaterMark:16}).wrap(rs) -} - -var Duplexify = function(writable, readable, opts) { - if (!(this instanceof Duplexify)) return new Duplexify(writable, readable, opts) - stream.Duplex.call(this, opts) - - this._writable = null - this._readable = null - this._readable2 = null - - this._autoDestroy = !opts || opts.autoDestroy !== false - this._forwardDestroy = !opts || opts.destroy !== false - this._forwardEnd = !opts || opts.end !== false - this._corked = 1 // start corked - this._ondrain = null - this._drained = false - this._forwarding = false - this._unwrite = null - this._unread = null - this._ended = false - - this.destroyed = false - - if (writable) this.setWritable(writable) - if (readable) this.setReadable(readable) -} - -inherits(Duplexify, stream.Duplex) - -Duplexify.obj = function(writable, readable, opts) { - if (!opts) opts = {} - opts.objectMode = true - opts.highWaterMark = 16 - return new Duplexify(writable, readable, opts) -} - -Duplexify.prototype.cork = function() { - if (++this._corked === 1) this.emit('cork') -} - -Duplexify.prototype.uncork = function() { - if (this._corked && --this._corked === 0) this.emit('uncork') -} - -Duplexify.prototype.setWritable = function(writable) { - if (this._unwrite) this._unwrite() - - if (this.destroyed) { - if (writable && writable.destroy) writable.destroy() - return - } - - if (writable === null || writable === false) { - this.end() - return - } - - var self = this - var unend = eos(writable, {writable:true, readable:false}, destroyer(this, this._forwardEnd)) - - var ondrain = function() { - var ondrain = self._ondrain - self._ondrain = null - if (ondrain) ondrain() - } - - var clear = function() { - self._writable.removeListener('drain', ondrain) - unend() - } - - if (this._unwrite) process.nextTick(ondrain) // force a drain on stream reset to avoid livelocks - - this._writable = writable - this._writable.on('drain', ondrain) - this._unwrite = clear - - this.uncork() // always uncork setWritable -} - -Duplexify.prototype.setReadable = function(readable) { - if (this._unread) this._unread() - - if (this.destroyed) { - if (readable && readable.destroy) readable.destroy() - return - } - - if (readable === null || readable === false) { - this.push(null) - this.resume() - return - } - - var self = this - var unend = eos(readable, {writable:false, readable:true}, destroyer(this)) - - var onreadable = function() { - self._forward() - } - - var onend = function() { - self.push(null) - } - - var clear = function() { - self._readable2.removeListener('readable', onreadable) - self._readable2.removeListener('end', onend) - unend() - } - - this._drained = true - this._readable = readable - this._readable2 = readable._readableState ? readable : toStreams2(readable) - this._readable2.on('readable', onreadable) - this._readable2.on('end', onend) - this._unread = clear - - this._forward() -} - -Duplexify.prototype._read = function() { - this._drained = true - this._forward() -} - -Duplexify.prototype._forward = function() { - if (this._forwarding || !this._readable2 || !this._drained) return - this._forwarding = true - - var data - - while (this._drained && (data = shift(this._readable2)) !== null) { - if (this.destroyed) continue - this._drained = this.push(data) - } - - this._forwarding = false -} - -Duplexify.prototype.destroy = function(err) { - if (this.destroyed) return - this.destroyed = true - - var self = this - process.nextTick(function() { - self._destroy(err) - }) -} - -Duplexify.prototype._destroy = function(err) { - if (err) { - var ondrain = this._ondrain - this._ondrain = null - if (ondrain) ondrain(err) - else this.emit('error', err) - } - - if (this._forwardDestroy) { - if (this._readable && this._readable.destroy) this._readable.destroy() - if (this._writable && this._writable.destroy) this._writable.destroy() - } - - this.emit('close') -} - -Duplexify.prototype._write = function(data, enc, cb) { - if (this.destroyed) return cb() - if (this._corked) return onuncork(this, this._write.bind(this, data, enc, cb)) - if (data === SIGNAL_FLUSH) return this._finish(cb) - if (!this._writable) return cb() - - if (this._writable.write(data) === false) this._ondrain = cb - else cb() -} - - -Duplexify.prototype._finish = function(cb) { - var self = this - this.emit('preend') - onuncork(this, function() { - end(self._forwardEnd && self._writable, function() { - // haxx to not emit prefinish twice - if (self._writableState.prefinished === false) self._writableState.prefinished = true - self.emit('prefinish') - onuncork(self, cb) - }) - }) -} - -Duplexify.prototype.end = function(data, enc, cb) { - if (typeof data === 'function') return this.end(null, null, data) - if (typeof enc === 'function') return this.end(data, null, enc) - this._ended = true - if (data) this.write(data) - if (!this._writableState.ending) this.write(SIGNAL_FLUSH) - return stream.Writable.prototype.end.call(this, cb) -} - -module.exports = Duplexify |