+ if ( width_a == width_b)
+ return value_compare_3way (&(*a)->from, &(*b)->from, width_a);
+
+ if ( width_a == 0 && width_b != 0)
+ return -1;
+
+ if ( width_b == 0 && width_a != 0)
+ return +1;
+
+ return buf_compare_rpad ((const char *) value_str (&(*a)->from, width_a), width_a,
+ (const char *) value_str (&(*b)->from, width_b), width_b);