xdiff/xhistogram: drop need for additional variable

diff --git a/sha1-array.h b/sha1-array.h
index 15d3b6b984f37735686a63eeb4eb64e7d95cb3d2..4499b5dad40924e9be2b6aacd73153326e6d11ec 100644 (file)
--- a/sha1-array.h
+++ b/sha1-array.h
@@ -15,4 +15,10 @@ void sha1_array_sort(struct sha1_array *array);
 int sha1_array_lookup(struct sha1_array *array, const unsigned char *sha1);
 void sha1_array_clear(struct sha1_array *array);
 
+typedef void (*for_each_sha1_fn)(const unsigned char sha1[20],
+                                void *data);
+void sha1_array_for_each_unique(struct sha1_array *array,
+                               for_each_sha1_fn fn,
+                               void *data);
+
 #endif /* SHA1_ARRAY_H */