From 43b0bb6a5e62a9262abcad63431bf9ac0c2d60cc Mon Sep 17 00:00:00 2001
From: Jason Volk <jason@zemos.net>
Date: Mon, 7 Oct 2024 19:19:53 +0000
Subject: [PATCH] add non-allocating fixed-size random string generator

Signed-off-by: Jason Volk <jason@zemos.net>
---
 src/core/utils/rand.rs | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/core/utils/rand.rs b/src/core/utils/rand.rs
index b80671eb..d717c4bd 100644
--- a/src/core/utils/rand.rs
+++ b/src/core/utils/rand.rs
@@ -3,6 +3,7 @@ use std::{
 	time::{Duration, SystemTime},
 };
 
+use arrayvec::ArrayString;
 use rand::{thread_rng, Rng};
 
 pub fn string(length: usize) -> String {
@@ -13,6 +14,18 @@ pub fn string(length: usize) -> String {
 		.collect()
 }
 
+#[inline]
+pub fn string_array<const LENGTH: usize>() -> ArrayString<LENGTH> {
+	let mut ret = ArrayString::<LENGTH>::new();
+	thread_rng()
+		.sample_iter(&rand::distributions::Alphanumeric)
+		.take(LENGTH)
+		.map(char::from)
+		.for_each(|c| ret.push(c));
+
+	ret
+}
+
 #[inline]
 #[must_use]
 pub fn timepoint_secs(range: Range<u64>) -> SystemTime {