Merge branch 'master' of https://github.com/gavofyork/ethcore-util
This commit is contained in:
debris
commit
60dc3decaa
96
src/trie.rs
96
src/trie.rs
@ -24,9 +24,10 @@ pub trait Trie {
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#[derive(Eq, PartialEq, Debug)]
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pub enum Node<'a> {
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NullRoot,
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Leaf(NibbleSlice<'a>, &'a[u8]),
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Extension(NibbleSlice<'a>, &'a[u8]),
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Branch(Option<[&'a[u8]; 16]>, &'a [u8])
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Branch([Option<&'a[u8]>; 16], Option<&'a [u8]>)
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}
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impl <'a>Node<'a> {
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@ -40,16 +41,18 @@ impl <'a>Node<'a> {
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// fed back into this function or inline RLP which can be fed back into this function).
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Prototype::List(2) => match NibbleSlice::from_encoded(r.at(0).data()) {
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(slice, true) => Node::Leaf(slice, r.at(1).data()),
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(slice, false) => Node::Extension(slice, r.at(1).raw())
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(slice, false) => Node::Extension(slice, r.at(1).raw()),
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},
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// branch - first 16 are nodes, 17th is a value (or empty).
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Prototype::List(17) => {
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let mut nodes: [&'a [u8]; 16] = unsafe { ::std::mem::uninitialized() };
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for i in 0..16 { nodes[i] = r.at(i).raw(); }
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Node::Branch(Some(nodes), r.at(16).data())
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let mut nodes: [Option<&'a [u8]>; 16] = unsafe { ::std::mem::uninitialized() };
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for i in 0..16 {
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nodes[i] = if r.at(i).is_empty() { None } else { Some(r.at(i).raw()) }
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}
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Node::Branch(nodes, if r.at(16).is_empty() { None } else { Some(r.at(16).data()) })
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},
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// an empty branch index.
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Prototype::Data(0) => Node::Branch(None, r.data()),
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Prototype::Data(0) => Node::NullRoot,
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// something went wrong.
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_ => panic!("Rlp is not valid.")
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}
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@ -70,13 +73,21 @@ impl <'a>Node<'a> {
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stream.append_raw(raw_rlp, 1);
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stream.out()
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},
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Node::Branch(Some(ref nodes), ref value) => {
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Node::Branch(ref nodes, ref value) => {
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let mut stream = RlpStream::new_list(17);
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for i in 0..16 { stream.append_raw(nodes[i], 1); }
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stream.append(value);
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for i in 0..16 {
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match nodes[i] {
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Some(n) => { stream.append_raw(n, 1); },
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None => { stream.append_empty_data(); },
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}
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}
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match *value {
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Some(n) => { stream.append(&n); },
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None => { stream.append_empty_data(); },
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}
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stream.out()
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},
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Node::Branch(_, _) => {
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Node::NullRoot => {
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let mut stream = RlpStream::new();
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stream.append_empty_data();
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stream.out()
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@ -187,28 +198,34 @@ impl TrieDB {
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fn fmt_all(&self, node: &[u8], f: &mut fmt::Formatter, deepness: usize) -> fmt::Result {
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let node = Node::decoded(node);
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match node {
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Node::Leaf(slice, value) => try!(writeln!(f, "Leaf {:?}, {:?}", slice, value.pretty())),
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Node::Leaf(slice, value) => try!(writeln!(f, "-{:?}: {:?}.", slice, value.pretty())),
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Node::Extension(ref slice, ref item) => {
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try!(write!(f, "Extension: {:?} ,", slice));
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try!(self.fmt_all(self.get_raw_or_lookup(item), f, deepness + 1));
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try!(write!(f, "-{:?}- ", slice));
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try!(self.fmt_all(self.get_raw_or_lookup(item), f, deepness));
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},
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Node::Branch(Some(ref nodes), ref value) => {
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try!(writeln!(f, "Branch: "));
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Node::Branch(ref nodes, ref value) => {
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try!(writeln!(f, ""));
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match value {
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&Some(v) => {
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try!(self.fmt_indent(f, deepness + 1));
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try!(writeln!(f, ": {:?}", value.pretty()));
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try!(writeln!(f, "=: {:?}", v.pretty()))
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},
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&None => {}
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}
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for i in 0..16 {
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let rlp = Rlp::new(nodes[i]);
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if rlp.is_data() && rlp.size() != 0 {
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match nodes[i] {
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Some(n) => {
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try!(self.fmt_indent(f, deepness + 1));
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try!(write!(f, "{:x}: ", i));
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try!(self.fmt_all(self.get_raw_or_lookup(nodes[i]), f, deepness + 1));
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try!(writeln!(f, ""));
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try!(self.fmt_all(self.get_raw_or_lookup(n), f, deepness + 1));
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},
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None => {},
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}
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}
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},
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// empty
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Node::Branch(_, _) => {
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// do nothing
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Node::NullRoot => {
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try!(writeln!(f, "<empty>"));
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}
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};
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Ok(())
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@ -225,9 +242,14 @@ impl TrieDB {
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Node::Extension(ref slice, ref item) if key.starts_with(slice) => {
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self.get_from_node(self.get_raw_or_lookup(item), &key.mid(slice.len()))
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},
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Node::Branch(Some(ref nodes), ref value) => match key.is_empty() {
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true => Some(value),
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false => self.get_from_node(self.get_raw_or_lookup(nodes[key.at(0) as usize]), &key.mid(1))
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Node::Branch(ref nodes, value) => match key.is_empty() {
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true => value,
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false => match nodes[key.at(0) as usize] {
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Some(payload) => {
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self.get_from_node(self.get_raw_or_lookup(payload), &key.mid(1))
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},
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None => None
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}
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},
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_ => None
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}
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@ -235,8 +257,9 @@ impl TrieDB {
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fn get_raw_or_lookup<'a>(&'a self, node: &'a [u8]) -> &'a [u8] {
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// check if its sha3 + len
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match node.len() > 32 {
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true => self.db.lookup(&H256::from_slice(&node[1..])).expect("Not found!"),
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let r = Rlp::new(node);
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match r.is_data() && r.size() == 32 {
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true => self.db.lookup(&H256::decode(&r)).expect("Not found!"),
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false => node
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}
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}
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@ -378,7 +401,7 @@ impl TrieDB {
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(true, i) if orig.at(i).is_empty() => // easy - original had empty slot.
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diff.new_node(Self::compose_leaf(&partial.mid(1), value), &mut s),
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(true, i) => { // harder - original has something there already
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let new = self.augmented(orig.at(i).raw(), &partial.mid(1), value, diff);
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let new = self.augmented(self.take_node(&orig.at(i), diff), &partial.mid(1), value, diff);
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diff.replace_node(&orig.at(i), new, &mut s);
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}
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(false, i) => { s.append_raw(orig.at(i).raw(), 1); },
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@ -457,7 +480,7 @@ impl TrieDB {
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trace!("empty: COMPOSE");
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Self::compose_leaf(partial, value)
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},
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_ => panic!("Invalid RLP for node."),
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_ => panic!("Invalid RLP for node: {:?}", old.pretty()),
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}
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}
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}
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@ -518,7 +541,7 @@ mod tests {
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#[test]
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fn test_node_empty_branch() {
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let branch = Node::Branch(None, &b""[..]);
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let branch = Node::Branch([None; 16], None);
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let rlp = branch.encoded();
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let branch2 = Node::decoded(&rlp);
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assert_eq!(branch, branch2);
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@ -527,10 +550,10 @@ mod tests {
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#[test]
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fn test_node_branch() {
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let k = rlp::encode(&"cat");
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let mut nodes: [&[u8]; 16] = unsafe { ::std::mem::uninitialized() };
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for i in 0..16 { nodes[i] = &k; }
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let mut nodes: [Option<&[u8]>; 16] = unsafe { ::std::mem::uninitialized() };
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for i in 0..16 { nodes[i] = Some(&k); }
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let v: Vec<u8> = From::from("dog");
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let branch = Node::Branch(Some(nodes), &v);
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let branch = Node::Branch(nodes, Some(&v));
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let rlp = branch.encoded();
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let branch2 = Node::decoded(&rlp);
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assert_eq!(branch, branch2);
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@ -582,14 +605,9 @@ mod tests {
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t.insert(&key, &val);
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}
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trace!("{:?}", t);
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println!("{:?}", t);
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for i in 0..v.len() {
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let key: &[u8]= &v[i].0;
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let val: &[u8] = &v[i].1;
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assert_eq!(t.at(&key).unwrap(), val);
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}
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// check lifetime
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let _q = t.at(&[b'd', b'o']).unwrap();
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@ -62,7 +62,8 @@ pub fn ordered_trie_root(input: Vec<Vec<u8>>) -> H256 {
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/// assert_eq!(trie_root(v), H256::from_str(root).unwrap());
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/// }
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/// ```
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pub fn trie_root(input: Vec<(Vec<u8>, Vec<u8>)>) -> H256 {
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pub fn trie_root(mut input: Vec<(Vec<u8>, Vec<u8>)>) -> H256 {
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input.sort();
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let gen_input = input
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.into_iter()
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.map(|(k, v)| (as_nibbles(&k), v))
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