From a82d73122d95f3b01e3dfad86f0f34e7584ffe75 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Maxime=20=E2=80=9Cpep=E2=80=9D=20Buquet?= <pep@bouah.net>
Date: Sun, 14 Nov 2021 00:20:30 +0100
Subject: [PATCH] pkstrings: prevent addition from overflowing
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Signed-off-by: Maxime “pep” Buquet <pep@bouah.net>
---
 pkstrings/src/lib.rs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/pkstrings/src/lib.rs b/pkstrings/src/lib.rs
index 06b023c..059694e 100644
--- a/pkstrings/src/lib.rs
+++ b/pkstrings/src/lib.rs
@@ -57,14 +57,14 @@ const fn strtohex(chr: &char) -> Option<u8> {
 
 const fn hextostr(hex: u8) -> Option<char> {
     Some(match hex {
-        cap @ 0x80..=0x99 => (('A' as u8) + cap - 0x80) as char,
+        cap @ 0x80..=0x99 => (('A' as u8) + (cap - 0x80)) as char,
         0x9a => '(',
         0x9b => ')',
         0x9c => ':',
         0x9d => ';',
         0x9e => '[',
         0x9f => ']',
-        low @ 0xa0..=0xb9 => (('a' as u8) + low - 0xa0) as char,
+        low @ 0xa0..=0xb9 => (('a' as u8) + (low - 0xa0)) as char,
         0xe0 => '\'',
         0xe3 => '-',
         0xe6 => '?',
@@ -79,7 +79,7 @@ const fn hextostr(hex: u8) -> Option<char> {
         0xf3 => '/',
         0xf4 => ',',
         0xf5 => '♀',
-        num @ 0xf6..=0xff => (('0' as u8) + num - 0xf6) as char,
+        num @ 0xf6..=0xff => (('0' as u8) + (num - 0xf6)) as char,
         0x7f => ' ',
         0x50 => '@',
         _ => return None,