vppinfra: A bitmap copy function

Type: improvement

Signed-off-by: Neale Ranns <neale@graphiant.com>
Change-Id: Id7a7788b41dbcf280e025e5256c41729b0c95f39

1 files changed, 18 insertions, 0 deletions

diff --git a/src/vppinfra/bitmap.h b/src/vppinfra/bitmap.h
index 92205bfc8e8..af651ef0b7e 100644
--- a/src/vppinfra/bitmap.h
+++ b/src/vppinfra/bitmap.h
@@ -115,6 +115,24 @@ clib_bitmap_is_equal (uword * a, uword * b)
 #define clib_bitmap_validate(v,n_bits) \
   clib_bitmap_vec_validate ((v), ((n_bits) - 1) / BITS (uword))
 
+/** Copy a bitmap
+    @param dst - copy to
+    @param src - copy from
+*/
+static_always_inline void
+clib_bitmap_copy (clib_bitmap_t **dst, const clib_bitmap_t *src)
+{
+  if (vec_len (src))
+    {
+      clib_bitmap_vec_validate (*dst, vec_len (src) - 1);
+      vec_copy (*dst, src);
+    }
+  else
+    {
+      vec_reset_length (*dst);
+    }
+}
+
 /* low-level routine to remove trailing zeros from a bitmap */
 always_inline uword *
 _clib_bitmap_remove_trailing_zeros (uword * a)