1  /*!
 2   * Determine if an object is a Buffer
 3   *
 4   * @author   Feross Aboukhadijeh <https://feross.org>
 5   * @license  MIT
 6   */
 7  
 8  // The _isBuffer check is for Safari 5-7 support, because it's missing
 9  // Object.prototype.constructor. Remove this eventually
10  module.exports = function (obj) {
11    return obj != null && (isBuffer(obj) || isSlowBuffer(obj) || !!obj._isBuffer)
12  }
13  
14  function isBuffer (obj) {
15    return !!obj.constructor && typeof obj.constructor.isBuffer === 'function' && obj.constructor.isBuffer(obj)
16  }
17  
18  // For Node v0.10 support. Remove this eventually.
19  function isSlowBuffer (obj) {
20    return typeof obj.readFloatLE === 'function' && typeof obj.slice === 'function' && isBuffer(obj.slice(0, 0))
21  }