+#define DIFF_PAIR_MODE_CHANGED(p) ((p)->one->mode != (p)->two->mode)
+
+#define DIFF_FILE_CANON_MODE(mode) \
+ (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
+ S_ISLNK(mode) ? S_IFLNK : S_IFDIR)
+
+extern void diff_free_filepair(struct diff_filepair *);
+