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-rw-r--r--src/vppinfra/vec.h10
1 files changed, 7 insertions, 3 deletions
diff --git a/src/vppinfra/vec.h b/src/vppinfra/vec.h
index 9054eaa5e57..e9836107799 100644
--- a/src/vppinfra/vec.h
+++ b/src/vppinfra/vec.h
@@ -1040,12 +1040,16 @@ do { \
/** \brief Sort a vector using the supplied element comparison function
+ Does not depend on the underlying implementation to deal correctly
+ with null, zero-long, or 1-long vectors
+
@param vec vector to sort
@param f comparison function
*/
-#define vec_sort_with_function(vec,f) \
-do { \
- qsort (vec, vec_len (vec), sizeof (vec[0]), (void *) (f)); \
+#define vec_sort_with_function(vec,f) \
+do { \
+ if (vec_len (vec) > 1) \
+ qsort (vec, vec_len (vec), sizeof (vec[0]), (void *) (f)); \
} while (0)
/** \brief Make a vector containing a NULL terminated c-string.