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Member "Atom/resources/app/apm/node_modules/readable-stream/lib/_stream_duplex.js" (8 Mar 2017, 2811 Bytes) of archive /windows/misc/atom-windows.zip:


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    1 // Copyright Joyent, Inc. and other Node contributors.
    2 //
    3 // Permission is hereby granted, free of charge, to any person obtaining a
    4 // copy of this software and associated documentation files (the
    5 // "Software"), to deal in the Software without restriction, including
    6 // without limitation the rights to use, copy, modify, merge, publish,
    7 // distribute, sublicense, and/or sell copies of the Software, and to permit
    8 // persons to whom the Software is furnished to do so, subject to the
    9 // following conditions:
   10 //
   11 // The above copyright notice and this permission notice shall be included
   12 // in all copies or substantial portions of the Software.
   13 //
   14 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
   15 // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   16 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
   17 // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
   18 // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
   19 // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
   20 // USE OR OTHER DEALINGS IN THE SOFTWARE.
   21 
   22 // a duplex stream is just a stream that is both readable and writable.
   23 // Since JS doesn't have multiple prototypal inheritance, this class
   24 // prototypally inherits from Readable, and then parasitically from
   25 // Writable.
   26 
   27 module.exports = Duplex;
   28 
   29 /*<replacement>*/
   30 var objectKeys = Object.keys || function (obj) {
   31   var keys = [];
   32   for (var key in obj) keys.push(key);
   33   return keys;
   34 }
   35 /*</replacement>*/
   36 
   37 
   38 /*<replacement>*/
   39 var util = require('core-util-is');
   40 util.inherits = require('inherits');
   41 /*</replacement>*/
   42 
   43 var Readable = require('./_stream_readable');
   44 var Writable = require('./_stream_writable');
   45 
   46 util.inherits(Duplex, Readable);
   47 
   48 forEach(objectKeys(Writable.prototype), function(method) {
   49   if (!Duplex.prototype[method])
   50     Duplex.prototype[method] = Writable.prototype[method];
   51 });
   52 
   53 function Duplex(options) {
   54   if (!(this instanceof Duplex))
   55     return new Duplex(options);
   56 
   57   Readable.call(this, options);
   58   Writable.call(this, options);
   59 
   60   if (options && options.readable === false)
   61     this.readable = false;
   62 
   63   if (options && options.writable === false)
   64     this.writable = false;
   65 
   66   this.allowHalfOpen = true;
   67   if (options && options.allowHalfOpen === false)
   68     this.allowHalfOpen = false;
   69 
   70   this.once('end', onend);
   71 }
   72 
   73 // the no-half-open enforcer
   74 function onend() {
   75   // if we allow half-open state, or if the writable side ended,
   76   // then we're ok.
   77   if (this.allowHalfOpen || this._writableState.ended)
   78     return;
   79 
   80   // no more data can be written.
   81   // But allow more writes to happen in this tick.
   82   process.nextTick(this.end.bind(this));
   83 }
   84 
   85 function forEach (xs, f) {
   86   for (var i = 0, l = xs.length; i < l; i++) {
   87     f(xs[i], i);
   88   }
   89 }