From d901633c75773ffaa8a1eb01cc9539e3f79b3924613e5c89d5f4b0236acf5d7e Mon Sep 17 00:00:00 2001
From: Nicholas Johnson <nick@nicholasjohnson.ch>
Date: Sun, 21 Apr 2024 00:00:00 +0000
Subject: Implement input validation

---
 src/hitomezashi.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/hitomezashi.rs b/src/hitomezashi.rs
index 9ec8758..8e2a773 100644
--- a/src/hitomezashi.rs
+++ b/src/hitomezashi.rs
@@ -36,6 +36,10 @@ pub fn hitomezashi(width: usize, height: usize, skew: Option<f64>) {
     // skew=0.5 generates the most random-looking patterns
     let skew: f64 = skew.unwrap_or(0.5);
 
+    assert!(width >= 1, "Width must be a positive number!");
+    assert!(height >= 1, "Height must be a positive number!");
+    assert!(skew >= 0.0 && skew <= 1.0, "Skew must be between zero and one inclusive!");
+
     let mut rng = rand::thread_rng();
     let brn = Bernoulli::new(skew).unwrap();
 
-- 
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