From ccce95dcd0cb3336182dd38faa0d56acd1b728e4 Mon Sep 17 00:00:00 2001
From: unwox <me@unwox.com>
Date: Tue, 15 Oct 2024 16:31:16 +0600
Subject: improve luna.utf methods

---
 main.go | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

(limited to 'main.go')

diff --git a/main.go b/main.go
index dd5e7fe..7ee2c9d 100644
--- a/main.go
+++ b/main.go
@@ -10,6 +10,7 @@ import (
 	"log"
 	"net/http"
 	"os"
+	"unicode/utf8"
 	"runtime"
 	"runtime/cgo"
 	"strings"
@@ -348,7 +349,7 @@ func main() {
 		if err != nil {
 			return luaErr(l, err)
 		}
-		return luaOk(l, len(str))
+		return luaOk(l, utf8.RuneCountInString(str))
 	}
 	utfModule["lower"] = func (l *Lua) int {
 		var str string
@@ -365,7 +366,9 @@ func main() {
 		if err != nil {
 			return luaErr(l, err)
 		}
-		return luaOk(l, str[start-1:start-1+length])
+		runes := []rune(str)
+		cut := runes[start-1:start-1+length]
+		return luaOk(l, string(cut))
 	}
 
 	module := make(map[string]any)
-- 
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