1 file changed, 14 insertions, 0 deletions
diff --git a/source/ui-shared.h b/source/ui-shared.h
index fb02d7b..871dba0 100644
--- a/source/ui-shared.h
+++ b/source/ui-shared.h
@@ -121,6 +121,20 @@ extern void cgit_print_error_page(int code, const char *msg, const char *fmt, ..
  * Answer with the error page for a blob of size bytes past max-blob-size.
  */
 extern void cgit_print_blob_too_large(size_t size);
+
+/*
+ * Resolve rev to the parsed commit it names, peeling a tag, with oid set to
+ * what rev itself names. Returns NULL once the 404 page naming rev is out.
+ */
+extern struct commit *cgit_get_commit(const char *rev, struct object_id *oid);
+
+/*
+ * Fill oid with the older end of a comparison with commit, which is what
+ * old_rev names when it is given, else commit's first parent, else the null
+ * id for a root commit. Returns -1 once the 404 page for old_rev is out.
+ */
+extern int cgit_get_old_oid(const char *old_rev, const struct commit *commit, struct object_id *oid);
+
 extern void cgit_print_filemode(unsigned short mode);
 extern void cgit_print_snapshot_links(const struct cgit_repo *repo, const char *ref,
 	const char *separator);