scanner_set_active (parser_context_t *context_p) /**< context */
{
  scanner_info_t *scanner_info_p = context_p->next_scanner_info_p;

  context_p->next_scanner_info_p = scanner_info_p->next_p;
  scanner_info_p->next_p = context_p->active_scanner_info_p;
  context_p->active_scanner_info_p = scanner_info_p;
} /* scanner_set_active */
scanner_set_active (parser_context_t *context_p)  
{
  scanner_info_t *scanner_info_p = context_p->next_scanner_info_p;

  context_p->next_scanner_info_p = scanner_info_p->next_p;
  scanner_info_p->next_p = context_p->active_scanner_info_p;
  context_p->active_scanner_info_p = scanner_info_p;
}  