30   struct heap_node* parent;  member
73                            struct heap_node* parent,  in heap_node_swap()  argument
78   t = *parent;  in heap_node_swap()
79   *parent = *child;  in heap_node_swap()
82   parent->parent = child;  in heap_node_swap()
84     child->left = parent;  in heap_node_swap()
87     child->right = parent;  in heap_node_swap()
91     sibling->parent = child;  in heap_node_swap()
93   if (parent->left != NULL)  in heap_node_swap()
94     parent->left->parent = parent;  in heap_node_swap()
95   if (parent->right != NULL)  in heap_node_swap()
96     parent->right->parent = parent;  in heap_node_swap()
98   if (child->parent == NULL)  in heap_node_swap()
100   else if (child->parent->left == parent)  in heap_node_swap()
101     child->parent->left = child;  in heap_node_swap()
103     child->parent->right = child;  in heap_node_swap()
109   struct heap_node** parent;  in HEAP_EXPORT()  local
117   newnode->parent = NULL;  in HEAP_EXPORT()
127   parent = child = &heap->min;  in HEAP_EXPORT()
129     parent = child;  in HEAP_EXPORT()
139   newnode->parent = *parent;  in HEAP_EXPORT()
146   while (newnode->parent != NULL && less_than(newnode, newnode->parent))  in HEAP_EXPORT()
147     heap_node_swap(heap, newnode->parent, newnode);  in HEAP_EXPORT()
198   child->parent = node->parent;  in HEAP_EXPORT()
201     child->left->parent = child;  in HEAP_EXPORT()
205     child->right->parent = child;  in HEAP_EXPORT()
208   if (node->parent == NULL) {  in HEAP_EXPORT()
210   } else if (node->parent->left == node) {  in HEAP_EXPORT()
211     node->parent->left = child;  in HEAP_EXPORT()
213     node->parent->right = child;  in HEAP_EXPORT()
235   while (child->parent != NULL && less_than(child, child->parent))  in HEAP_EXPORT()
236     heap_node_swap(heap, child->parent, child);  in HEAP_EXPORT()