3 files changed, 23 insertions, 0 deletions
diff --git a/src/lib/def.h b/src/lib/inc/def.h
index dc3cc55..69b43e3 100644
--- a/src/lib/def.h
+++ b/src/lib/inc/def.h
@@ -1,3 +1,5 @@
+// MIT License, Copyright (c) 2020 Marvin Borner
+
 #ifndef DEF_H
 #define DEF_H
 
diff --git a/src/lib/inc/string.h b/src/lib/inc/string.h
new file mode 100644
index 0000000..c97fada
--- /dev/null
+++ b/src/lib/inc/string.h
@@ -0,0 +1,10 @@
+// MIT License, Copyright (c) 2020 Marvin Borner
+
+#ifndef STRING_H
+#define STRING_H
+
+#include <def.h>
+
+u32 strlen(const char *str);
+
+#endif
diff --git a/src/lib/string.c b/src/lib/string.c
new file mode 100644
index 0000000..1b7a2b8
--- /dev/null
+++ b/src/lib/string.c
@@ -0,0 +1,11 @@
+// MIT License, Copyright (c) 2020 Marvin Borner
+
+#include <def.h>
+
+u32 strlen(const char *str)
+{
+	u32 len = 0;
+	while (str[len])
+		len++;
+	return len;
+}