610     if ( tb->lnum[h] == 0 && tb->rnum[h] == 0 ) {  in balance_internal_when_delete()
644     if ( tb->L[h] && tb->lnum[h] == -B_NR_ITEMS(tb->L[h]) - 1 ) { /* join S[h] with L[h] */  in balance_internal_when_delete()
657 	RFALSE( tb->lnum[h] != 0,  in balance_internal_when_delete()
659 		h, tb->lnum[h]);  in balance_internal_when_delete()
667     if ( tb->lnum[h] < 0 ) { /* borrow from left neighbor L[h] */  in balance_internal_when_delete()
671 	internal_shift_right (INTERNAL_SHIFT_FROM_L_TO_S, tb, h, -tb->lnum[h]);  in balance_internal_when_delete()
676 	 RFALSE( tb->lnum[h] != 0,  in balance_internal_when_delete()
678 		 h, tb->lnum[h]);  in balance_internal_when_delete()
683     if ( tb->lnum[h] > 0 ) { /* split S[h] into two parts and put them into neighbors */  in balance_internal_when_delete()
684 	RFALSE( tb->rnum[h] == 0 || tb->lnum[h] + tb->rnum[h] != n + 1,  in balance_internal_when_delete()
686 		h, tb->lnum[h], h, tb->rnum[h], n);  in balance_internal_when_delete()
688 …internal_shift_left (INTERNAL_SHIFT_FROM_S_TO_L, tb, h, tb->lnum[h]);/*tb->L[h], tb->CFL[h], tb->l…  in balance_internal_when_delete()
696 		    h, tb->lnum[h], h, tb->rnum[h]);  in balance_internal_when_delete()
795     if ( tb->lnum[h] > 0 ) {  in balance_internal()
800 	if ( tb->lnum[h] <= child_pos ) {  in balance_internal()
802 	    internal_shift_left (INTERNAL_SHIFT_FROM_S_TO_L, tb, h, tb->lnum[h]);  in balance_internal()
804 	    child_pos -= tb->lnum[h];  in balance_internal()
805 	} else if ( tb->lnum[h] > child_pos + insert_num ) {  in balance_internal()
807 	    internal_shift_left (INTERNAL_SHIFT_FROM_S_TO_L, tb, h, tb->lnum[h] - insert_num);  in balance_internal()
826 	    k = tb->lnum[h] - child_pos - 1;  in balance_internal()