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// btree.rs
use pyo3::prelude::*;
/// Struct representing a node in the B-tree.
#[pyclass]
struct BTreeNode {
/// Keys stored in the node.
keys: Vec<i32>,
/// Children nodes.
children: Vec<BTreeNode>,
/// Flag indicating if the node is a leaf node.
is_leaf: bool,
}
#[pymethods]
impl BTreeNode {
/// Constructor for a new B-tree node.
#[new]
fn new() -> Self {
BTreeNode {
keys: Vec::new(),
children: Vec::new(),
is_leaf: true,
}
}
/// Checks if the node is empty.
fn is_empty(&self) -> bool {
self.keys.is_empty()
}
/// Inserts a key into the node.
fn insert(&mut self, key: i32) {
// Dummy implementation: Insert key into the appropriate position in the keys vector
self.keys.push(key);
self.keys.sort(); // Should implement proper B-tree insertion logic
}
/// Searches for a key in the node.
fn search(&self, key: i32) -> bool {
// Dummy implementation: Perform binary search in sorted keys array
self.keys.binary_search(&key).is_ok()
}
}
/// Struct representing a B-tree.
#[pyclass]
pub struct BTree {
/// Root node of the B-tree.
root: Option<BTreeNode>,
/// Degree of the B-tree.
degree: usize,
}
#[pymethods]
impl BTree {
/// Constructor for a new B-tree.
#[new]
fn new(degree: usize) -> Self {
BTree {
root: None,
degree,
}
}
/// Checks if the B-tree is empty.
fn is_empty(&self) -> bool {
self.root.is_none()
}
/// Inserts a key into the B-tree.
fn insert(&mut self, key: i32) {
// Dummy implementation: Insert key into the B-tree
if let Some(ref mut root) = self.root {
// Insert into the root node
root.insert(key);
} else {
// Create a new root node if none exists
let mut new_root = BTreeNode::new();
new_root.insert(key);
self.root = Some(new_root);
}
}
/// Searches for a key in the B-tree.
fn search(&self, key: i32) -> bool {
// Dummy implementation: Perform search in the B-tree
if let Some(ref root) = self.root {
root.search(key)
} else {
false
}
}
}