From cd6d0773b3ae89301ac0629595f291d8a1915ae5 Mon Sep 17 00:00:00 2001
From: Eric-Paul Ickhorn <ericp.ickhorn@gmail.com>
Date: Tue, 12 Dec 2023 23:26:31 +0100
Subject: [PATCH] Fixed a bug which made reading an UTF-8 character impossible.

---
 core/src-c/runes.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/core/src-c/runes.c b/core/src-c/runes.c
index b545c59..17d2da3 100644
--- a/core/src-c/runes.c
+++ b/core/src-c/runes.c
@@ -1,9 +1,9 @@
 #include <librr/runes.h>
 
-isz_t rr_distance_to_last_utf8_rune_start(const char *string, usz_t offset)
+isz_t rr_distance_to_last_utf8_rune_start(const char *string, isz_t offset)
 {
     usz_t                       bytes_walked                    = 0;
-    while(bytes_walked < offset)
+    while((offset - bytes_walked) >= 0)
     {
         if(bytes_walked > 4)
             return -1;