1 files changed, 17 insertions, 0 deletions
diff --git a/src/util.rs b/src/util.rs
new file mode 100644
index 0000000..fdc3bed
--- /dev/null
+++ b/src/util.rs
@@ -0,0 +1,17 @@
+use anyhow::Context as _;
+use std::io::BufRead as _;
+
+pub fn read_ints(filename: &str) -> anyhow::Result<Vec<i32>> {
+    let f = std::fs::File::open(filename)
+        .with_context(|| format!("couldn't find data file {}", filename))?;
+    let f = std::io::BufReader::new(f);
+    let ints: anyhow::Result<Vec<i32>> = f
+        .lines()
+        .map(|l| {
+            l.context("failed to read a line")?
+                .parse()
+                .context("failed to parse line into an integer")
+        })
+        .collect();
+    ints
+}