list: Add helper macro for iterating lists

At the moment, iterating over a ply_list_t requires an an
ugly looking for loop.

This commit adds a little sugar in the form of a
ply_list_foreach macro in the name of convenience.

diff --git a/src/libply/ply-list.h b/src/libply/ply-list.h
index 2a3e187b9c006f2059c0096bc5680321460a70e7..1dd848f51285db18b5b979a319f00e24d9b6e8b9 100644 (file)
--- a/src/libply/ply-list.h
+++ b/src/libply/ply-list.h
@@ -56,6 +56,9 @@ ply_list_node_t *ply_list_get_nth_node (ply_list_t *list,
 ply_list_node_t *ply_list_get_next_node (ply_list_t      *list,
                                          ply_list_node_t *node);
 void *ply_list_node_get_data (ply_list_node_t *node);
+
+#define ply_list_foreach(list, node) \
+        for (node = ply_list_get_first_node (list); node != NULL; node = ply_list_get_next_node (list, node))
 #endif
 
 #endif /* PLY_LIST_H */