/*
This file is part of GNUnet.
- (C) 2008, 2009 Christian Grothoff (and other contributing authors)
-
+ Copyright (C) 2008, 2009 GNUnet e.V.
+
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 2, or (at your
+ by the Free Software Foundation; either version 3, or (at your
option) any later version.
-
+
GNUnet is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
-
+
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
+ Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
*/
/**
*/
#include "platform.h"
-#include "gnunet_util_lib.h"
+#include "gnunet_container_lib.h"
+#define LOG(kind,...) GNUNET_log_from (kind, "util", __VA_ARGS__)
-#define DEBUG 0
+#define EXTRA_CHECKS 0
/**
* Node in the heap.
};
-#if DEBUG
+#if EXTRA_CHECKS
/**
* Check if internal invariants hold for the given node.
*
{
struct GNUNET_CONTAINER_Heap *heap;
- heap = GNUNET_malloc (sizeof (struct GNUNET_CONTAINER_Heap));
+ heap = GNUNET_new (struct GNUNET_CONTAINER_Heap);
heap->order = order;
return heap;
}
/**
- * Get element stored at root of heap.
+ * Get element stored at the root of @a heap.
*
- * @param heap heap to inspect
- * @return NULL if heap is empty
+ * @param heap Heap to inspect.
+ * @return Element at the root, or NULL if heap is empty.
*/
void *
GNUNET_CONTAINER_heap_peek (const struct GNUNET_CONTAINER_Heap *heap)
}
+/**
+ * Get @a element and @a cost stored at the root of @a heap.
+ *
+ * @param[in] heap Heap to inspect.
+ * @param[out] element Root element is returned here.
+ * @param[out] cost Cost of @a element is returned here.
+ * @return #GNUNET_YES if an element is returned,
+ * #GNUNET_NO if the heap is empty.
+ */
+int
+GNUNET_CONTAINER_heap_peek2 (const struct GNUNET_CONTAINER_Heap *heap,
+ void **element,
+ GNUNET_CONTAINER_HeapCostType *cost)
+{
+ if (NULL == heap->root)
+ return GNUNET_NO;
+ if (NULL != element)
+ *element = heap->root->element;
+ if (NULL != cost)
+ *cost = heap->root->cost;
+ return GNUNET_YES;
+}
+
+
/**
* Get the current size of the heap
*
return node->cost;
}
+
/**
* Iterate over the children of the given node.
*
{
struct GNUNET_CONTAINER_HeapNode *node;
- node = GNUNET_malloc (sizeof (struct GNUNET_CONTAINER_HeapNode));
+ node = GNUNET_new (struct GNUNET_CONTAINER_HeapNode);
node->heap = heap;
node->element = element;
node->cost = cost;
heap->root = root->left_child;
insert_node (heap, heap->root, root->right_child);
}
+ if (heap->walk_pos == root)
+ heap->walk_pos = heap->root;
GNUNET_free (root);
-#if DEBUG
+#if EXTRA_CHECKS
GNUNET_assert (((heap->size == 0) && (heap->root == NULL)) ||
(heap->size == heap->root->tree_size + 1));
CHECK (heap->root);
/**
* Removes a node from the heap.
- *
+ *
* @param node node to remove
* @return element data stored at the node
*/
if (heap->walk_pos == node)
heap->walk_pos = NULL;
GNUNET_free (node);
-#if DEBUG
+#if EXTRA_CHECKS
CHECK (heap->root);
GNUNET_assert (((heap->size == 0) && (heap->root == NULL)) ||
(heap->size == heap->root->tree_size + 1));
struct GNUNET_CONTAINER_HeapNode *node,
GNUNET_CONTAINER_HeapCostType new_cost)
{
-#if DEBUG
+#if EXTRA_CHECKS
GNUNET_assert (((heap->size == 0) && (heap->root == NULL)) ||
(heap->size == heap->root->tree_size + 1));
CHECK (heap->root);
#endif
remove_node (node);
-#if DEBUG
+#if EXTRA_CHECKS
CHECK (heap->root);
GNUNET_assert (((heap->size == 1) && (heap->root == NULL)) ||
(heap->size == heap->root->tree_size + 2));
heap->root = node;
else
insert_node (heap, heap->root, node);
-#if DEBUG
+#if EXTRA_CHECKS
CHECK (heap->root);
GNUNET_assert (((heap->size == 0) && (heap->root == NULL)) ||
(heap->size == heap->root->tree_size + 1));