Diff iterators

This refactors the diff output code so that an iterator object
can be used to traverse and generate the diffs, instead of just
the `foreach()` style with callbacks.  The code has been rearranged
so that the two styles can still share most functions.

This also replaces `GIT_REVWALKOVER` with `GIT_ITEROVER` and uses
that as a common error code for marking the end of iteration when
using a iterator style of object.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/diff.h b/src/diff.h
index 6cc854fbd..2785fa425 100644
--- a/src/diff.h
+++ b/src/diff.h
@@ -26,6 +26,7 @@ enum {
 };
 
 struct git_diff_list {
+	git_refcount     rc;
 	git_repository   *repo;
 	git_diff_options opts;
 	git_vector       pathspec;