From: Lennart Poettering <lennart@poettering.net>
Date: Tue, 14 Nov 2017 22:21:57 +0000 (+0100)
Subject: strv: introduce strv_free_and_replace()
X-Git-Tag: v236~158^2~5
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=b302a50d852b33efe018cd7cd3d47799b1ec094b;p=thirdparty%2Fsystemd.git

strv: introduce strv_free_and_replace()

it's like free_and_replace() but uses strv_free()
---

diff --git a/src/basic/strv.h b/src/basic/strv.h
index c793b2cf514..0ed6b74330c 100644
--- a/src/basic/strv.h
+++ b/src/basic/strv.h
@@ -181,3 +181,11 @@ char **strv_skip(char **l, size_t n);
 int strv_extend_n(char ***l, const char *value, size_t n);
 
 int fputstrv(FILE *f, char **l, const char *separator, bool *space);
+
+#define strv_free_and_replace(a, b)             \
+        ({                                      \
+                strv_free(a);                   \
+                (a) = (b);                      \
+                (b) = NULL;                     \
+                0;                              \
+        })