lib/bigint.js
function dup(x) {
    var i, buff;
    buff=new Array(x.length);
    copy_(buff,x);
    return buff;
  }
function dup(x) {
    var i, buff;
    buff=new Array(x.length);
    copy_(buff,x);
    return buff;
  }
function dup ( x ) { var i , buff ; buff = new Array ( x . length ) ; copy_ ( buff , x ) ; return buff ; }
returns a duplicate of bigInt x
returns a duplicate of bigInt x