macro: add STRLITERALLEN() and STRARRAYLEN()

sizeof() implementation for string literals and string arrays that makes it behave like strlen() for strings. Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

macro: add STRLITERALLEN() and STRARRAYLEN()
b4616616 · Christian Brauner · 4cbbb135 · b4616616
Unverified Commit b4616616 authored Sep 22, 2018 by Christian Brauner
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macro.h src/lxc/macro.h +3 -0

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--- a/src/lxc/macro.h
+++ b/src/lxc/macro.h
@@ -348,4 +348,7 @@ extern int __build_bug_on_failed;
 #define LXC_INVALID_UID ((uid_t)-1)
 #define LXC_INVALID_GID ((gid_t)-1)

+#define STRLITERALLEN(x) (sizeof(""x"") - 1)
+#define STRARRAYLEN(x) (sizeof(x) - 1)
+
 #endif /* __LXC_MACRO_H */