Server : nginx/1.20.1 System : Linux ccpf-production-2021 5.4.0-148-generic #165-Ubuntu SMP Tue Apr 18 08:53:12 UTC 2023 x86_64 User : forge ( 1000) PHP Version : 7.4.21 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare, Directory :  /lib/node_modules/gulp/node_modules/lazystream/lib/

Upload File : current_dir [ Writeable ] document_root [ Writeable ]

var util = require('util');
var PassThrough = require('readable-stream/passthrough');

module.exports = {
  Readable: Readable,
  Writable: Writable
};

util.inherits(Readable, PassThrough);
util.inherits(Writable, PassThrough);

// Patch the given method of instance so that the callback
// is executed once, before the actual method is called the
// first time.
function beforeFirstCall(instance, method, callback) {
  instance[method] = function() {
    delete instance[method];
    callback.apply(this, arguments);
    return this[method].apply(this, arguments);
  };
}

function Readable(fn, options) {
  if (!(this instanceof Readable))
    return new Readable(fn, options);

  PassThrough.call(this, options);

  beforeFirstCall(this, '_read', function() {
    var source = fn.call(this, options);
    var emit = this.emit.bind(this, 'error');
    source.on('error', emit);
    source.pipe(this);
  });

  this.emit('readable');
}

function Writable(fn, options) {
  if (!(this instanceof Writable))
    return new Writable(fn, options);

  PassThrough.call(this, options);

  beforeFirstCall(this, '_write', function() {
    var destination = fn.call(this, options);
    var emit = this.emit.bind(this, 'error');
    destination.on('error', emit);
    this.pipe(destination);
  });

  this.emit('writable');
}