diff options
Diffstat (limited to 'lib/isc/heap.c')
| -rw-r--r-- | lib/isc/heap.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/lib/isc/heap.c b/lib/isc/heap.c index 9c495a7..91d78c0 100644 --- a/lib/isc/heap.c +++ b/lib/isc/heap.c @@ -1,8 +1,8 @@ /* - * Copyright (C) 2004-2006 Internet Systems Consortium, Inc. ("ISC") + * Copyright (C) 2004-2007 Internet Systems Consortium, Inc. ("ISC") * Copyright (C) 1997-2001 Internet Software Consortium. * - * Permission to use, copy, modify, and distribute this software for any + * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * @@ -15,7 +15,7 @@ * PERFORMANCE OF THIS SOFTWARE. */ -/* $Id: heap.c,v 1.30.18.3 2006/04/17 18:27:33 explorer Exp $ */ +/* $Id: heap.c,v 1.37 2007/10/19 17:15:53 explorer Exp $ */ /*! \file * Heap implementation of priority queues adapted from the following: @@ -208,9 +208,13 @@ isc_heap_delete(isc_heap_t *heap, unsigned int index) { REQUIRE(index >= 1 && index <= heap->last); if (index == heap->last) { + heap->array[heap->last] = NULL; heap->last--; } else { - elt = heap->array[heap->last--]; + elt = heap->array[heap->last]; + heap->array[heap->last] = NULL; + heap->last--; + less = heap->compare(elt, heap->array[index]); heap->array[index] = elt; if (less) @@ -239,9 +243,11 @@ isc_heap_decreased(isc_heap_t *heap, unsigned int index) { void * isc_heap_element(isc_heap_t *heap, unsigned int index) { REQUIRE(VALID_HEAP(heap)); - REQUIRE(index >= 1 && index <= heap->last); + REQUIRE(index >= 1); - return (heap->array[index]); + if (index <= heap->last) + return (heap->array[index]); + return (NULL); } void |
