From: Alejandro Colomar <alx@kernel.org>
Date: Mon, 13 Mar 2023 00:51:12 +0000 (+0100)
Subject: Add STRLEN(): a constexpr strlen(3) for string literals
X-Git-Tag: 4.14.0-rc1~125
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=664d361fa549a3be5a00607ec6723f95ce33c688;p=thirdparty%2Fshadow.git

Add STRLEN(): a constexpr strlen(3) for string literals

Signed-off-by: Alejandro Colomar <alx@kernel.org>
Reviewed-by: Iker Pedrosa <ipedrosa@redhat.com>
---

diff --git a/lib/defines.h b/lib/defines.h
index c285e119f..efaddd00b 100644
--- a/lib/defines.h
+++ b/lib/defines.h
@@ -171,6 +171,7 @@ static inline void memzero(void *ptr, size_t size)
 
 #define WIDTHOF(x)   (sizeof(x) * CHAR_BIT)
 #define NITEMS(arr)  (sizeof((arr)) / sizeof((arr)[0]))
+#define STRLEN(s)    (NITEMS(s) - 1)
 
 /* Copy string pointed by B to array A with size checking.  It was originally
    in lmain.c but is _very_ useful elsewhere.  Some setuid root programs with