1 files changed, 207 insertions, 0 deletions
diff --git a/libcnary/node.c b/libcnary/node.c
new file mode 100644
index 0000000..956ba2f
--- /dev/null
+++ b/libcnary/node.c
@@ -0,0 +1,207 @@
+/*
+ * node.c
+ *
+ *  Created on: Mar 7, 2011
+ *      Author: posixninja
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "node.h"
+#include "node_list.h"
+#include "node_iterator.h"
+
+void node_destroy(node_t* node) {
+	if(!node) return;
+
+	if (node->children && node->children->count > 0) {
+		node_t* ch;
+		while ((ch = node->children->begin)) {
+			node_list_remove(node->children, ch);
+			node_destroy(ch);
+		}
+	}
+	node_list_destroy(node->children);
+	node->children = NULL;
+
+	free(node);
+}
+
+node_t* node_create(node_t* parent, void* data) {
+	int error = 0;
+
+	node_t* node = (node_t*) malloc(sizeof(node_t));
+	if(node == NULL) {
+		return NULL;
+	}
+	memset(node, '\0', sizeof(node_t));
+
+	node->data = data;
+	node->depth = 0;
+	node->next = NULL;
+	node->prev = NULL;
+	node->count = 0;
+	node->isLeaf = TRUE;
+	node->isRoot = TRUE;
+	node->parent = NULL;
+	node->children = node_list_create(node);
+
+	// Pass NULL to create a root node
+	if(parent != NULL) {
+		// This is a child node so attach it to it's parent
+		error = node_attach(parent, node);
+		if(error < 0) {
+			// Unable to attach nodes
+			printf("ERROR: %d \"Unable to attach nodes\"\n", error);
+			node_destroy(node);
+			return NULL;
+		}
+	}
+
+	return node;
+}
+
+int node_attach(node_t* parent, node_t* child) {
+	if (!parent || !child) return -1;
+	child->isLeaf = TRUE;
+	child->isRoot = FALSE;
+	child->parent = parent;
+	child->depth = parent->depth + 1;
+	if(parent->isLeaf == TRUE) {
+		parent->isLeaf = FALSE;
+	}
+	int res = node_list_add(parent->children, child);
+	if (res == 0) {
+		parent->count++;
+	}
+	return res;
+}
+
+int node_detach(node_t* parent, node_t* child) {
+	if (!parent || !child) return 0;
+	if (node_list_remove(parent->children, child) == 0) {
+		parent->count--;
+	}
+	return 0;
+}
+
+int node_insert(node_t* parent, unsigned int index, node_t* child)
+{
+	if (!parent || !child) return;
+	child->isLeaf = TRUE;
+	child->isRoot = FALSE;
+	child->parent = parent;
+	child->depth = parent->depth + 1;
+	if(parent->isLeaf == TRUE) {
+		parent->isLeaf = FALSE;
+	}
+	int res = node_list_insert(parent->children, index, child);
+	if (res == 0) {
+		parent->count++;
+	}
+	return res;
+}
+
+void node_debug(node_t* node) {
+	int i = 0;
+	node_t* current = NULL;
+	node_iterator_t* iter = NULL;
+	for(i = 0; i < node->depth; i++) {
+		printf("\t");
+	}
+	if(node->isRoot) {
+		printf("ROOT\n");
+	}
+
+	if(node->isLeaf && !node->isRoot) {
+		printf("LEAF\n");
+
+	} else {
+		if(!node->isRoot) {
+			printf("NODE\n");
+		}
+		iter = node_iterator_create(node->children);
+		for(current = iter->begin; current != NULL; current = iter->next(iter)) {
+			node_debug(current);
+		}
+	}
+
+}
+
+unsigned int node_n_children(struct node_t* node)
+{
+	if (!node) return 0;
+	return node->count;
+}
+
+node_t* node_nth_child(struct node_t* node, unsigned int n)
+{
+	if (!node || !node->children || !node->children->begin) return NULL;
+	int index = 0;
+	int found = 0;
+	node_t *ch;
+	for (ch = node_first_child(node); ch; ch = node_next_sibling(ch)) {
+		if (index++ == n) {
+			found = 1;
+			break;
+		}
+	}
+	if (!found) {
+		return NULL;
+	}
+	return ch;
+}
+
+node_t* node_first_child(struct node_t* node)
+{
+	if (!node || !node->children) return NULL;
+	return node->children->begin;
+}
+
+node_t* node_prev_sibling(struct node_t* node)
+{
+	if (!node) return NULL;
+	return node->prev;
+}
+
+node_t* node_next_sibling(struct node_t* node)
+{
+	if (!node) return NULL;
+	return node->next;
+}
+
+int node_child_position(struct node_t* parent, node_t* child)
+{
+	if (!parent || !parent->children || !parent->children->begin || !child) return -1;
+	int index = 0;
+	int found = 0;
+	node_t *ch;
+	for (ch = node_first_child(parent); ch; ch = node_next_sibling(ch)) {
+		if (ch == child) {
+			found = 1;
+			break;
+		}
+		index++;
+	}
+	if (!found) {
+		return -1;
+	}
+	return index;
+}
+
+node_t* node_copy_deep(node_t* node, copy_func_t copy_func)
+{
+	if (!node) return NULL;
+	void *data;
+	if (copy_func) {
+		data = copy_func(node->data);
+	}
+	node_t* copy = node_create(NULL, data);
+	node_t* ch;
+	for (ch = node_first_child(node); ch; ch = node_next_sibling(ch)) {
+		node_t* cc = node_copy_deep(ch, copy_func);
+		node_attach(copy, cc);
+	}
+	return copy;
+}