dreemgl/system/lib/node_modules/isstream/isstream.js

DreemGL is an open-source multi-screen prototyping framework for mediated environments, with a visual editor and shader styling for webGL and DALi runtimes written in JavaScript. As a toolkit for gpu-accelerated multiscreen development, DreemGL includes

var stream = require('stream')


function isStream (obj) {
  return obj instanceof stream.Stream
}


function isReadable (obj) {
  return isStream(obj) && typeof obj._read == 'function' && typeof obj._readableState == 'object'
}


function isWritable (obj) {
  return isStream(obj) && typeof obj._write == 'function' && typeof obj._writableState == 'object'
}


function isDuplex (obj) {
  return isReadable(obj) && isWritable(obj)
}


module.exports            = isStream
module.exports.isReadable = isReadable
module.exports.isWritable = isWritable
module.exports.isDuplex   = isDuplex