From 0c36512d04b2798614d6f2321a6bb33834d1102b Mon Sep 17 00:00:00 2001
From: eutro <git@eutro.dev>
Date: Tue, 18 Feb 2025 12:34:33 +0000
Subject: [PATCH] Add sugar/spice/everything nice to Girl and
 snips/snails/puppy-dogs' tails to Boy

---
 src/main.rs | 110 ++++++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 94 insertions(+), 16 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 26bd1b5..ea744b0 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -90,24 +90,76 @@ See: https://github.com/rust-lang/rust/issues/25860
 This program is open-source! View the source for all these exploits here: https://github.com/Speykious/cve-rs
 ";
 
-#[repr(C)]
-#[derive(Debug)]
-struct Boy {
-	age: u32,
-	name: String,
-	github_username: String,
-}
-
-#[repr(C)]
-#[derive(Debug)]
-struct Girl {
-	age: u32,
-	name: String,
-	github_username: String,
-}
-
 fn transmute_demo(command: &str) -> std::io::Result<()> {
+	use std::hash::{DefaultHasher, Hash as _, Hasher as _};
 	use std::io::Write as _;
+	use std::str::FromStr;
+
+	#[repr(C)]
+	#[derive(Debug)]
+	struct Boy {
+		age: u32,
+		name: String,
+		github_username: String,
+		snips: u32,
+		snails: u32,
+		puppy_dogs_tails: u64,
+	}
+
+	#[repr(C)]
+	#[derive(Debug)]
+	struct Girl {
+		age: u32,
+		name: String,
+		github_username: String,
+		sugar: f32,
+		spice: f32,
+		everything_nice: f64,
+	}
+
+	// Trait to obtain the ingredients from hashing arbitrary strings,
+	// if the user doesn't want to give us numbers.
+	trait FromHash: Sized {
+		fn from_hash(hash: u64) -> Self;
+	}
+
+	impl FromHash for u64 {
+		fn from_hash(hash: u64) -> Self {
+			hash
+		}
+	}
+
+	impl FromHash for u32 {
+		fn from_hash(hash: u64) -> Self {
+			(hash & Self::MAX as u64) as Self
+		}
+	}
+
+	impl FromHash for f64 {
+		fn from_hash(hash: u64) -> Self {
+			// Cauchy distribution
+			let angle = (hash as f64 / u64::MAX as f64 - 0.5) * std::f64::consts::PI;
+			angle.tan()
+		}
+	}
+
+	impl FromHash for f32 {
+		fn from_hash(hash: u64) -> Self {
+			f64::from_hash(hash) as f32
+		}
+	}
+
+	fn parse_or_hash<T>(input: String) -> T
+	where
+		T: FromStr,
+		T: FromHash,
+	{
+		input.parse::<T>().unwrap_or_else(|_| {
+			let mut h = DefaultHasher::new();
+			input.hash(&mut h);
+			T::from_hash(h.finish())
+		})
+	}
 
 	let stdin = std::io::stdin();
 	let mut stdout = std::io::stdout();
@@ -149,12 +201,35 @@ fn transmute_demo(command: &str) -> std::io::Result<()> {
 		input_buf.trim().to_owned()
 	};
 
+	let (ingredient1, ingredient2, ingredient3) = {
+		let recipe = match command {
+			"boy-to-girl" => "snips, snails and puppy-dogs' tails",
+			"girl-to-boy" => "sugar and spice and everything nice",
+			_ => unreachable!(),
+		};
+		print!("Enter {recipe} values, separated by commas: ");
+		stdout.flush()?;
+
+		input_buf.clear();
+		stdin.read_line(&mut input_buf)?;
+
+		let mut iter = input_buf.split(",").map(str::trim);
+		(
+			iter.next().unwrap_or("0").to_owned(),
+			iter.next().unwrap_or("0").to_owned(),
+			iter.next().unwrap_or("0").to_owned(),
+		)
+	};
+
 	match command {
 		"boy-to-girl" => {
 			let boy: Boy = Boy {
 				age,
 				name,
 				github_username,
+				snips: parse_or_hash(ingredient1),
+				snails: parse_or_hash(ingredient2),
+				puppy_dogs_tails: parse_or_hash(ingredient3),
 			};
 			println!("Before transmute: {boy:?}");
 
@@ -167,6 +242,9 @@ fn transmute_demo(command: &str) -> std::io::Result<()> {
 				age,
 				name,
 				github_username,
+				sugar: parse_or_hash(ingredient1),
+				spice: parse_or_hash(ingredient2),
+				everything_nice: parse_or_hash(ingredient3),
 			};
 			println!("Before transmute: {girl:?}");