map: implement map_copy

Copies all entries from one map to another, overwriting existing entries.

1 files changed, 2 insertions, 0 deletions

diff --git a/map.h b/map.h
index 078c9c6..0540fab 100644
--- a/map.h
+++ b/map.h
@@ -21,6 +21,8 @@ bool map_put(Map*, const char *key, const void *value);
 /* Remove a member from the map. Returns the removed entry or NULL
  * if there was no entry found using the given key*/
 void *map_delete(Map*, const char *key);
+/* Copy all entries from `src' into `dest', overwrites existing entries in `dest' */
+bool map_copy(Map *dest, Map *src);
 /* Ordered iteration over a map, call handle for every entry. If handle
  * returns false, the iteration will stop. */
 void map_iterate(const Map*, bool (*handle)(const char *key, void *value, void *data), const void *data);