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Clearer variable names in MMR tests

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This commit is contained in:
Jack Grigg 2019-12-05 14:29:08 +00:00
parent edcd884fe8
commit f1619f896c
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GPG Key ID: 9E8255172BBF9898
1 changed files with 19 additions and 22 deletions
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41
librustzcash/src/tests/mmr.rs
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@ -10,8 +10,8 @@ struct TreeView {
extra: Vec<(u32, Entry)>,
}
fn draft(into: &mut Vec<(u32, Entry)>, vec: &[NodeData], peak_pos: usize, h: u32) {
let node_data = vec[peak_pos - 1].clone();
fn draft(into: &mut Vec<(u32, Entry)>, nodes: &[NodeData], peak_pos: usize, h: u32) {
let node_data = nodes[peak_pos - 1].clone();
let peak: Entry = match h {
0 => node_data.into(),
_ => Entry::new(
@ -24,27 +24,27 @@ fn draft(into: &mut Vec<(u32, Entry)>, vec: &[NodeData], peak_pos: usize, h: u32
into.push(((peak_pos - 1) as u32, peak));
}
fn prepare_tree(vec: &[NodeData]) -> TreeView {
assert!(!vec.is_empty());
fn prepare_tree(nodes: &[NodeData]) -> TreeView {
assert!(!nodes.is_empty());
// integer log2 of (vec.len()+1), -1
let mut h = (32 - ((vec.len() + 1) as u32).leading_zeros() - 1) - 1;
// integer log2 of (nodes.len()+1), -1
let mut h = (32 - ((nodes.len() + 1) as u32).leading_zeros() - 1) - 1;
let mut peak_pos = (1 << (h + 1)) - 1;
let mut nodes = Vec::new();
let mut peaks = Vec::new();
// used later
let mut last_peak_pos = 0;
let mut last_peak_h = 0;
loop {
if peak_pos > vec.len() {
if peak_pos > nodes.len() {
// left child, -2^h
peak_pos -= 1 << h;
h -= 1;
}
if peak_pos <= vec.len() {
draft(&mut nodes, vec, peak_pos, h);
if peak_pos <= nodes.len() {
draft(&mut peaks, nodes, peak_pos, h);
// save to be used in next loop
last_peak_pos = peak_pos;
@ -70,25 +70,22 @@ fn prepare_tree(vec: &[NodeData]) -> TreeView {
h -= 1;
// drafting left child
draft(&mut extra, vec, left_pos, h);
draft(&mut extra, nodes, left_pos, h);
// drafting right child
draft(&mut extra, vec, right_pos, h);
draft(&mut extra, nodes, right_pos, h);
// continuing on right slope
peak_pos = right_pos;
}
TreeView {
peaks: nodes,
extra,
}
TreeView { peaks, extra }
}
fn preload_tree_append(vec: &[NodeData]) -> (Vec<u32>, Vec<[u8; zcash_mmr::MAX_ENTRY_SIZE]>) {
assert!(!vec.is_empty());
fn preload_tree_append(nodes: &[NodeData]) -> (Vec<u32>, Vec<[u8; zcash_mmr::MAX_ENTRY_SIZE]>) {
assert!(!nodes.is_empty());
let tree_view = prepare_tree(vec);
let tree_view = prepare_tree(nodes);
let mut indices = Vec::new();
let mut bytes = Vec::new();
@ -107,11 +104,11 @@ fn preload_tree_append(vec: &[NodeData]) -> (Vec<u32>, Vec<[u8; zcash_mmr::MAX_E
// also returns number of peaks
fn preload_tree_delete(
vec: &[NodeData],
nodes: &[NodeData],
) -> (Vec<u32>, Vec<[u8; zcash_mmr::MAX_ENTRY_SIZE]>, usize) {
assert!(!vec.is_empty());
assert!(!nodes.is_empty());
let tree_view = prepare_tree(vec);
let tree_view = prepare_tree(nodes);
let mut indices = Vec::new();
let mut bytes = Vec::new();