Function swap

stackgl_modules/index.js:496–500

(b, n, m)

// See: https://github.com/feross/buffer/issues/154
Buffer.prototype._isBuffer = true;
function swap(b, n, m) {
  var i = b[n];
  b[n] = b[m];
  b[m] = i;
}
Buffer.prototype.swap16 = function swap16() {
  var len = this.length;
  if (len % 2 !== 0) {