remove uuid

src/function_manager.rs

@@ -1,5 +1,6 @@
 use crate::consts::is_mobile;
 use crate::function_entry::FunctionEntry;
+use crate::misc::random_u64;
 use crate::widgets::widgets_ontop;
 use egui::{Button, Id, Key, Modifiers, TextEdit, WidgetText};
 use emath::vec2;
@@ -10,7 +11,6 @@ use serde::Deserializer;
 use serde::Serialize;
 use serde::Serializer;
 use std::ops::BitXorAssign;
-use uuid::Uuid;
 
 pub struct FunctionManager {
 	functions: Vec<(Id, FunctionEntry)>,
@@ -18,11 +18,9 @@ pub struct FunctionManager {
 
 impl Default for FunctionManager {
 	fn default() -> Self {
-		// hash of 684fc8be-4ba0-408d-96ef-480b0642126f
-		// is 11414819524356497634
 		Self {
 			functions: vec![(
-				Id::new_from_u64(11414819524356497634), // Random uuid here to avoid call to `Uuid::new_v4()`
+				Id::new_from_u64(11414819524356497634), // Random number here to avoid call to random
 				FunctionEntry::EMPTY,
 			)],
 		}
@@ -237,7 +235,7 @@ impl FunctionManager {
 	/// Create and push new empty function entry
 	pub fn push_empty(&mut self) {
 		self.functions
-			.push((Id::new(Uuid::new_v4()), FunctionEntry::EMPTY));
+			.push((Id::new_from_u64(random_u64()), FunctionEntry::EMPTY));
 	}
 
 	/// Detect if any functions are using integrals

src/misc.rs

@@ -1,6 +1,7 @@
 use std::{intrinsics::assume, ops::RangeInclusive};
 
 use egui::plot::{Line, Points, Value, Values};
+use getrandom::getrandom;
 use itertools::Itertools;
 
 /// [`SteppedVector`] is used in order to efficiently sort through an ordered
@@ -286,3 +287,9 @@ pub const fn hashed_storage_read(data: &str) -> Option<(HashBytes, &[u8])> {
 		&decoded_1[HASH_LENGTH..],
 	))
 }
+
+pub fn random_u64() -> u64 {
+	let mut data: [u8; 8] = [0, 0, 0, 0, 0, 0, 0, 0];
+	getrandom(&mut data).expect("unable to generate random number");
+	u64::from_be_bytes(data)
+}