From: Alejandro Colomar <alx@kernel.org>
Date: Sun, 25 May 2025 13:04:25 +0000 (+0200)
Subject: lib/sizeof.h: Make sure STRLEN() only accepts string literals
X-Git-Tag: 4.18.0-rc1~82
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=15941679e32be88d577fd08cca85fc15d3daff07;p=thirdparty%2Fshadow.git

lib/sizeof.h: Make sure STRLEN() only accepts string literals

Link: <https://stackoverflow.com/a/79369560/6872717>
Signed-off-by: Alejandro Colomar <alx@kernel.org>
---

diff --git a/lib/sizeof.h b/lib/sizeof.h
index ed0fc155d..6051b7777 100644
--- a/lib/sizeof.h
+++ b/lib/sizeof.h
@@ -21,7 +21,7 @@
 #define WIDTHOF(x)           (sizeof(x) * CHAR_BIT)
 #define SIZEOF_ARRAY(a)      (sizeof(a) + must_be_array(a))
 #define NITEMS(a)            (SIZEOF_ARRAY((a)) / sizeof((a)[0]))
-#define STRLEN(s)            (NITEMS(s) - 1)
+#define STRLEN(s)            (NITEMS("" s "") - 1)
 
 
 #endif  // include guard