Method alloc

gfanlib/gfanlib_z.h:216–221

      data=value<<1;
    }
    void alloc(int nlimbs)//one limb is added since that will tell the number of remaining limbs
    {
      int64_t temp=(int64_t)malloc((nlimbs+1)*limbSizeInBytes);
      assert(temp);
      data=temp+1;
    }
    LimbWord *limbs()//assuming that limbs exist
    {
      return (LimbWord*)(data-1);