From: Jan Janssen <medhefgo@web.de>
Date: Wed, 11 Aug 2021 12:59:46 +0000 (+0200)
Subject: macro: Move some macros to macro-fundamental.h
X-Git-Tag: v250-rc1~835^2~9
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=f862e847246b5588d9d6ed7d91da11b6adbf39e7;p=thirdparty%2Fsystemd.git

macro: Move some macros to macro-fundamental.h

Also, make sure STRLEN works with wide strings too.
---

diff --git a/src/basic/macro.h b/src/basic/macro.h
index 92498b0f20e..3e89ba5e4d3 100644
--- a/src/basic/macro.h
+++ b/src/basic/macro.h
@@ -23,28 +23,12 @@
 #define _packed_ __attribute__((__packed__))
 #define _malloc_ __attribute__((__malloc__))
 #define _weak_ __attribute__((__weak__))
-#define _likely_(x) (__builtin_expect(!!(x), 1))
-#define _unlikely_(x) (__builtin_expect(!!(x), 0))
 #define _public_ __attribute__((__visibility__("default")))
 #define _hidden_ __attribute__((__visibility__("hidden")))
 #define _weakref_(x) __attribute__((__weakref__(#x)))
 #define _alignas_(x) __attribute__((__aligned__(__alignof(x))))
 #define _alignptr_ __attribute__((__aligned__(sizeof(void*))))
 #define _warn_unused_result_ __attribute__((__warn_unused_result__))
-#if __GNUC__ >= 7
-#define _fallthrough_ __attribute__((__fallthrough__))
-#else
-#define _fallthrough_
-#endif
-/* Define C11 noreturn without <stdnoreturn.h> and even on older gcc
- * compiler versions */
-#ifndef _noreturn_
-#if __STDC_VERSION__ >= 201112L
-#define _noreturn_ _Noreturn
-#else
-#define _noreturn_ __attribute__((__noreturn__))
-#endif
-#endif
 
 #if !defined(HAS_FEATURE_MEMORY_SANITIZER)
 #  if defined(__has_feature)
@@ -209,13 +193,6 @@ static inline size_t GREEDY_ALLOC_ROUND_UP(size_t l) {
         return m;
 }
 
-/*
- * STRLEN - return the length of a string literal, minus the trailing NUL byte.
- *          Contrary to strlen(), this is a constant expression.
- * @x: a string literal.
- */
-#define STRLEN(x) (sizeof(""x"") - 1U)
-
 /*
  * container_of - cast a member of a structure out to the containing structure
  * @ptr: the pointer to the member.
diff --git a/src/fundamental/macro-fundamental.h b/src/fundamental/macro-fundamental.h
index e9fb4d39380..91b24a18264 100644
--- a/src/fundamental/macro-fundamental.h
+++ b/src/fundamental/macro-fundamental.h
@@ -14,6 +14,22 @@
 #define _used_ __attribute__((__used__))
 #define _unused_ __attribute__((__unused__))
 #define _cleanup_(x) __attribute__((__cleanup__(x)))
+#define _likely_(x) (__builtin_expect(!!(x), 1))
+#define _unlikely_(x) (__builtin_expect(!!(x), 0))
+#if __GNUC__ >= 7
+#define _fallthrough_ __attribute__((__fallthrough__))
+#else
+#define _fallthrough_
+#endif
+/* Define C11 noreturn without <stdnoreturn.h> and even on older gcc
+ * compiler versions */
+#ifndef _noreturn_
+#if __STDC_VERSION__ >= 201112L
+#define _noreturn_ _Noreturn
+#else
+#define _noreturn_ __attribute__((__noreturn__))
+#endif
+#endif
 
 #define XSTRINGIFY(x) #x
 #define STRINGIFY(x) XSTRINGIFY(x)
@@ -233,3 +249,10 @@
                 (ptr) = NULL;                   \
                 _ptr_;                          \
         })
+
+/*
+ * STRLEN - return the length of a string literal, minus the trailing NUL byte.
+ *          Contrary to strlen(), this is a constant expression.
+ * @x: a string literal.
+ */
+#define STRLEN(x) (sizeof(""x"") - sizeof(typeof(x[0])))
diff --git a/src/test/test-format-util.c b/src/test/test-format-util.c
index 4e6c90adfae..306e0788d08 100644
--- a/src/test/test-format-util.c
+++ b/src/test/test-format-util.c
@@ -7,6 +7,8 @@
 /* Do some basic checks on STRLEN() and DECIMAL_STR_MAX() */
 assert_cc(STRLEN("xxx") == 3);
 assert_cc(STRLEN("") == 0);
+assert_cc(STRLEN(L"xxx") == 3 * sizeof(wchar_t));
+assert_cc(STRLEN(L"") == 0);
 assert_cc(DECIMAL_STR_MAX(uint8_t) == 5);
 assert_cc(DECIMAL_STR_MAX(int8_t) == 5);
 assert_cc(DECIMAL_STR_MAX(uint64_t) == 22);