[Mesa-dev] [PATCH 01/11] util: Add foreach_reverse for dynarray

[Caio Marcelo de Oliveira Filho]

Useful to walk the array removing elements by swapping them with the
last element.
---
 src/util/u_dynarray.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/util/u_dynarray.h b/src/util/u_dynarray.h
index 6bea481d44b..f74bfc7080b 100644
--- a/src/util/u_dynarray.h
+++ b/src/util/u_dynarray.h
@@ -154,6 +154,12 @@ util_dynarray_trim(struct util_dynarray *buf)
    for (type *elem = (type *)(buf)->data; \
         elem < (type *)((char *)(buf)->data + (buf)->size); elem++)
 
+#define util_dynarray_foreach_reverse(buf, type, elem)          \
+   if ((buf)->size > 0)                                         \
+      for (type *elem = util_dynarray_top_ptr(buf, type);       \
+           elem >= (type *)(buf)->data;                         \
+           elem--)
+
 #define util_dynarray_delete_unordered(buf, type, v)                    \
    do {                                                                 \
       unsigned num_elements = (buf)->size / sizeof(type);               \
-- 
2.19.0