From 2ebd08e9494155ec4f3fe6435e3a8db5c9c3fa77 Mon Sep 17 00:00:00 2001
From: Matheus <matheusuky@gmail.com>
Date: Mon, 6 Apr 2026 21:40:40 -0300
Subject: [PATCH] string: strnlen

---
 kernel-src/include/string.h | 1 +
 kernel-src/lib/string.c     | 9 +++++++++
 2 files changed, 10 insertions(+)

diff --git a/kernel-src/include/string.h b/kernel-src/include/string.h
index 60ccfd22..0635253a 100644
--- a/kernel-src/include/string.h
+++ b/kernel-src/include/string.h
@@ -4,6 +4,7 @@
 #include <stddef.h>
 
 size_t strlen(const char *str);
+size_t strnlen(const char *str, size_t max);
 char *strcpy(char *dest, const char *src);
 char *strcat(char *dest, const char *str);
 void *memcpy(void *dest, const void *src, size_t size);
diff --git a/kernel-src/lib/string.c b/kernel-src/lib/string.c
index 55a90f60..42ee6d19 100644
--- a/kernel-src/lib/string.c
+++ b/kernel-src/lib/string.c
@@ -65,6 +65,15 @@ size_t strlen(const char *a) {
 	return s;
 }
 
+size_t strnlen(const char *a, size_t max) {
+	size_t s = 0;
+
+	while (s < max && a[s] != '\0')
+		++s;
+
+	return s;
+}
+
 int strncmp(const char *a, const char *b, size_t c) {
 	int diff = 0;