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extern crate alloc;
use serde::{Deserialize, Serialize};
use alloc::vec::Vec;
use core::default::Default;
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Segment {
pub hardened: bool,
pub i: u32,
}
impl Segment {
pub fn from_u32(i: u32) -> Self {
Self {
hardened: i >= Self::HARDEN_MASK,
i, }
}
pub fn hardened(&self) -> bool {
self.hardened
}
pub(crate) fn is_normal(&self) -> bool {
self.i & Self::HARDEN_MASK == 0
}
pub fn bs(&self) -> [u8; 4] {
self.i.to_be_bytes()
}
pub const HARDEN_MASK: u32 = 1 << 31;
}
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Chain(pub Vec<Segment>);
impl Chain {
pub fn empty() -> Self {
Self(Vec::new())
}
pub fn from_u32<I: IntoIterator<Item = u32>>(is: I) -> Self {
Self(is.into_iter().map(Segment::from_u32).collect())
}
pub fn from_u32_hardened<I: IntoIterator<Item = u32>>(is: I) -> Self {
Self::from_u32(is.into_iter().map(|i| Segment::HARDEN_MASK | i))
}
pub fn join<O: AsRef<Chain>>(&self, o: O) -> Self {
let mut ss = self.0.clone();
ss.extend_from_slice(&o.as_ref().0);
Self(ss)
}
pub fn segments(&self) -> Vec<Segment> {
self.0.clone()
}
}
impl Default for Chain {
fn default() -> Self {
Chain::empty()
}
}
impl AsRef<Chain> for Chain {
fn as_ref(&self) -> &Self {
self
}
}