diff: avoid generating unused hunk header lines

diff --git a/xdiff-interface.h b/xdiff-interface.h
index 2dbe2feb196c4b568c0773784059b50f74640526..8af245eed9b43b5c9473d2dcb4beccbdafda7546 100644 (file)
--- a/xdiff-interface.h
+++ b/xdiff-interface.h
@@ -35,6 +35,14 @@ extern void xdiff_clear_find_func(xdemitconf_t *xecfg);
 extern int git_xmerge_config(const char *var, const char *value, void *cb);
 extern int git_xmerge_style;
 
+/*
+ * Can be used as a no-op hunk_fn for xdi_diff_outf(), since a NULL
+ * one just sends the hunk line to the line_fn callback).
+ */
+void discard_hunk_line(void *priv,
+                      long ob, long on, long nb, long nn,
+                      const char *func, long funclen);
+
 /*
  * Compare the strings l1 with l2 which are of size s1 and s2 respectively.
  * Returns 1 if the strings are deemed equal, 0 otherwise.