static void stbi__fill_bits(stbi__zbuf *z)
{
   do {
      if (z->code_buffer >= (1U << z->num_bits)) {
        z->zbuffer = z->zbuffer_end;  /* treat this as EOF so we fail. */
        return;
      }
      z->code_buffer |= (unsigned int) stbi__zget8(z) << z->num_bits;
      z->num_bits += 8;
   } while (z->num_bits <= 24);
}
Unknown