X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvppinfra%2Fvec_bootstrap.h;h=fec0df0814302fe443ea5fd8ce64fc963a159f4b;hb=ec11b13a21b2becc1d1bd746a04624d17b26583f;hp=6db83f23f7281e20cb8695eccf73afafddceaac2;hpb=6a5adc369591fcac2447e9809deaa22f56b53911;p=vpp.git

diff --git a/src/vppinfra/vec_bootstrap.h b/src/vppinfra/vec_bootstrap.h
index 6db83f23f72..fec0df08143 100644
--- a/src/vppinfra/vec_bootstrap.h
+++ b/src/vppinfra/vec_bootstrap.h
@@ -39,7 +39,7 @@
 #define included_clib_vec_bootstrap_h
 
 /** \file
-    Vector bootsrap header file
+    Vector bootstrap header file
 */
 
 /* Bootstrap include so that #include <vppinfra/mem.h> can include e.g.
@@ -47,7 +47,7 @@
 
 /** \brief vector header structure
 
-   Bookeeping header preceding vector elements in memory.
+   Bookkeeping header preceding vector elements in memory.
    User header information may preceed standard vec header.
    If you change u32 len -> u64 len, single vectors can
    exceed 2**32 elements. Clib heaps are vectors. */
@@ -191,6 +191,10 @@ for (var = vec_end (vec) - 1; var >= (vec); var--)
 /** \brief Iterate over vector indices. */
 #define vec_foreach_index(var,v) for ((var) = 0; (var) < vec_len (v); (var)++)
 
+/** \brief Iterate over vector indices (reverse). */
+#define vec_foreach_index_backwards(var,v) \
+  for ((var) = vec_len((v)) - 1; (var) >= 0; (var)--)
+
 #endif /* included_clib_vec_bootstrap_h */
 
 /*