Add new code

Signed-off-by: Carlos Maiolino <[email protected]>

1 files changed, 71 insertions, 0 deletions

diff --git a/Algorithms/bplus-tree/src/bplus_leaf.c b/Algorithms/bplus-tree/src/bplus_leaf.c
new file mode 100644
index 0000000..a6b6ae5
--- /dev/null
+++ b/Algorithms/bplus-tree/src/bplus_leaf.c
@@ -0,0 +1,71 @@
+/**
+ * Distributed under the Boost Software License, Version 1.0.
+ * See accompanying file LICENSE or copy at http://www.boost.org/LICENSE_1_0.txt
+ */
+
+#include "bplus_leaf.h"
+
+BplusLeaf* bplus_leaf_new(BplusTree* tree)
+{
+    g_return_val_if_fail(tree != NULL, NULL);
+
+    BplusLeaf* leaf = g_slice_new(BplusLeaf);
+
+    bplus_node_init(&leaf->node, TRUE);
+    leaf->left  = NULL;
+    leaf->right = NULL;
+
+#ifdef BPLUS_TREE_GATHER_STATS
+    tree->node_count++;
+    tree->leaf_count++;
+    tree->underflow_count++;
+#endif /* ifdef BPLUS_TREE_GATHER_STATS */
+
+    return leaf;
+}
+
+BplusLeaf* bplus_leaf_new_right(BplusTree* tree, BplusLeaf* leaf_left)
+{
+    g_return_val_if_fail(tree != NULL, NULL);
+    g_return_val_if_fail(leaf_left != NULL, NULL);
+
+    BplusLeaf* leaf_right = bplus_leaf_new(tree);
+
+    leaf_right->left  = leaf_left;
+    leaf_right->right = leaf_left->right;
+    leaf_left->right  = leaf_right;
+
+    if (leaf_right->right != NULL)
+        leaf_right->right->left = leaf_right;
+
+    if (tree->last == leaf_left)
+        tree->last = leaf_right;
+
+    return leaf_right;
+}
+
+void bplus_leaf_destroy(BplusTree* tree, BplusLeaf* leaf)
+{
+    g_return_if_fail(tree != NULL);
+    g_return_if_fail(leaf != NULL);
+
+    if (leaf->left != NULL)
+        leaf->left->right = leaf->right;
+
+    if (leaf->right != NULL)
+        leaf->right->left = leaf->left;
+
+    if (tree->first == leaf)
+        tree->first = leaf->right;
+
+    if (tree->last == leaf)
+        tree->last = leaf->left;
+
+#ifdef BPLUS_TREE_GATHER_STATS
+    tree->node_count--;
+    tree->leaf_count--;
+    tree->underflow_count--;
+#endif /* ifdef BPLUS_TREE_GATHER_STATS */
+
+    g_slice_free(BplusLeaf, leaf);
+}