Introduce _cleanup_fdset_free_

[elogind.git] / src / shared / util.h

diff --git a/src/shared/util.h b/src/shared/util.h
index c9d078257f5a96620c4c03054c012060b0b180f1..09e556d0114b7da5756823727e767955fa37637a 100644 (file)
--- a/src/shared/util.h
+++ b/src/shared/util.h
@@ -405,6 +405,7 @@ static inline const char *ansi_highlight_off(void) {
 int running_in_chroot(void);
 
 char *ellipsize(const char *s, size_t length, unsigned percent);
+                                   /* bytes                 columns */
 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent);
 
 int touch(const char *path);
@@ -771,3 +772,15 @@ bool id128_is_valid(const char *s) _pure_;
 void parse_user_at_host(char *arg, char **user, char **host);
 
 int split_pair(const char *s, const char *sep, char **l, char **r);
+
+/**
+ * Normal qsort requires base to be nonnull. Here were require
+ * that only if nmemb > 0.
+ */
+static inline void qsort_safe(void *base, size_t nmemb, size_t size,
+                              int (*compar)(const void *, const void *)) {
+        if (nmemb) {
+                assert(base);
+                qsort(base, nmemb, size, compar);
+        }
+}