Unverified Commit b5b178b8 authored by dwuggh's avatar dwuggh
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initial commit

update
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authors = ["dwuggh <dwuggh@gmail.com>"]
edition = "2018"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
log = "0.4"
env_logger = "0.8.3"
ansi_term = "0.12"
petgraph = "0.5.1"
rand = "0.8.3"
clap = "3.0.0-beta.2"
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pub mod mwpm;
pub use mwpm::minimum_weight_perfect_match;
use std::io::Write;
use std::process::{Command, Stdio};
use petgraph::{graph::NodeIndex, Graph, Undirected};
use std::collections::HashMap;
pub fn minimum_weight_perfect_match(
graph: &Graph<i64, usize, Undirected>,
) -> Option<HashMap<usize, usize>> {
if graph.node_count() == 0 {
return Some(HashMap::new());
}
let mut child = Command::new("/home/dwuggh/Projects/QCQI/blossom5-v2.05.src/blossom5")
.stdin(Stdio::piped())
.stdout(Stdio::piped())
.spawn()
.unwrap();
{
let stdin = &mut child.stdin.take().unwrap();
gen_blossom5_input(stdin, graph).unwrap();
}
let output = child.wait_with_output().unwrap();
let mut result: HashMap<usize, usize> = HashMap::new();
if output.status.success() {
let raw_output = String::from_utf8(output.stdout).unwrap();
// println!("output: {}", raw_output);
let mut iter = raw_output.split_whitespace();
iter.next();
loop {
if let Some(s1) = iter.next() {
let i1 = s1.parse::<usize>().unwrap();
let i2 = iter.next().unwrap().parse::<usize>().unwrap();
let w1 = *graph.node_weight(NodeIndex::new(i1)).unwrap();
let w2 = *graph.node_weight(NodeIndex::new(i2)).unwrap();
if w1 == -w2 - 1 {
let w = w1.abs() as usize;
result.insert(w, w);
} else if w1 >= 0 && w2 >= 0 {
result.insert(w1 as usize, w2 as usize);
}
} else {
break;
}
}
return Some(result);
}
None
}
fn gen_blossom5_input(
handle: &mut std::process::ChildStdin,
graph: &Graph<i64, usize, Undirected>,
) -> std::io::Result<()> {
let v = graph.node_count();
let e = graph.edge_count();
// let stdout = io::stdout();
// let mut handle = stdout.lock();
let s1 = format!("{} {}\n", v, e);
// print!("{}", s1);
handle.write_all(s1.as_bytes())?;
for v1 in graph.node_indices() {
for v2 in graph.node_indices() {
if v1 < v2 {
if let Some(edge) = graph.find_edge(v1, v2) {
let s = format!(
"{} {} {}\n",
v1.index(),
v2.index(),
graph.edge_weight(edge).unwrap()
);
// print!("{}", s);
handle.write_all(s.as_bytes())?;
}
}
}
}
Ok(())
}
#[allow(dead_code)]
struct BlossomVSolver {}
#[cfg(test)]
mod tests {
use super::*;
fn gen_test_graph() -> Graph<i64, usize, Undirected> {
let mut graph: Graph<i64, usize, Undirected> = Graph::new_undirected();
let v0 = graph.add_node(6);
let v1 = graph.add_node(7);
let v2 = graph.add_node(8);
let v3 = graph.add_node(9);
let v4 = graph.add_node(10);
let v5 = graph.add_node(11);
graph.add_edge(v0, v1, 3);
graph.add_edge(v0, v3, 10);
graph.add_edge(v0, v4, 7);
graph.add_edge(v1, v2, 0);
graph.add_edge(v1, v4, 5);
graph.add_edge(v1, v5, 4);
graph.add_edge(v2, v5, 0);
graph.add_edge(v3, v4, 0);
graph.add_edge(v4, v5, 4);
graph
}
#[test]
fn blossom5_test() {
let graph = gen_test_graph();
let result = minimum_weight_perfect_match(&</