Optionally support old diffs

Some versions of diff do not correctly detect a missing new-line at the end
of the file under certain circumstances.

When defining NO_ACCURATE_DIFF, work around this bug.

Signed-off-by: Johannes E. Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>

1 files changed, 8 insertions, 0 deletions

diff --git a/apply.c b/apply.c
index 2ad47fbbb3..1083d4f316 100644
--- a/apply.c
+++ b/apply.c
@@ -1142,6 +1142,14 @@ static int apply_one_fragment(struct buffer_desc *desc, struct fragment *frag)
 		size -= len;
 	}
 
+#ifdef NO_ACCURATE_DIFF
+	if (oldsize > 0 && old[oldsize - 1] == '\n' &&
+			newsize > 0 && new[newsize - 1] == '\n') {
+		oldsize--;
+		newsize--;
+	}
+#endif
+			
 	offset = find_offset(buf, desc->size, old, oldsize, frag->newpos);
 	if (offset >= 0) {
 		int diff = newsize - oldsize;