From: Antoine Pelisse <apelisse@gmail.com>
To: git@vger.kernel.org
Cc: Antoine Pelisse <apelisse@gmail.com>
Subject: [PATCH] diff: Fix rename pretty-print when suffix and prefix overlap
Date: Sat, 23 Feb 2013 17:48:45 +0100 [thread overview]
Message-ID: <1361638125-11245-1-git-send-email-apelisse@gmail.com> (raw)
When considering a rename for two files that have a suffix and a prefix
that can overlap, a confusing line is shown. As an example, renaming
"a/b/b/c" to "a/b/c" shows "a/b/{ => }/b/c".
Currently, what we do is calculate the common prefix ("a/b/"), and the
common suffix ("/b/c"), but the same "/b/" is actually counted both in
prefix and suffix. Then when calculating the size of the non-common part,
we end-up with a negative value which is reset to 0, thus the "{ => }".
Do not allow the common suffix to overlap the common prefix and stop
when reaching a "/" that would be in both.
Signed-off-by: Antoine Pelisse <apelisse@gmail.com>
---
diff.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/diff.c b/diff.c
index 156fec4..80f4752 100644
--- a/diff.c
+++ b/diff.c
@@ -1290,7 +1290,16 @@ static char *pprint_rename(const char *a, const char *b)
old = a + len_a;
new = b + len_b;
sfx_length = 0;
- while (a <= old && b <= new && *old == *new) {
+ /*
+ * Note:
+ * if pfx_length is 0, old/new will never reach a - 1 because it
+ * would mean the whole string is common suffix. But then, the
+ * whole string would also be a common prefix, and we would not
+ * have pfx_length equals 0.
+ */
+ while (a + pfx_length - 1 <= old &&
+ b + pfx_length - 1 <= new &&
+ *old == *new) {
if (*old == '/')
sfx_length = len_a - (old - a);
old--;
--
1.7.9.5
next reply other threads:[~2013-02-23 16:49 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-23 16:48 Antoine Pelisse [this message]
2013-02-24 9:15 ` [PATCH] diff: Fix rename pretty-print when suffix and prefix overlap Junio C Hamano
2013-02-25 19:50 ` Antoine Pelisse
2013-02-25 22:36 ` Philip Oakley
2013-02-25 22:41 ` Antoine Pelisse
2013-02-28 21:55 ` Antoine Pelisse
2013-02-28 22:14 ` Thomas Rast
2013-02-28 22:22 ` Antoine Pelisse
2013-02-28 22:29 ` Junio C Hamano
2013-03-02 14:38 ` [PATCH] tests: make sure rename pretty print works Antoine Pelisse
2013-03-03 6:50 ` Junio C Hamano
2013-03-06 21:36 ` [PATCH v2] " Antoine Pelisse
2013-03-06 22:03 ` Junio C Hamano
2013-02-26 20:47 ` [PATCH] diff: prevent pprint_rename from underrunning input Thomas Rast
2013-02-26 21:44 ` Junio C Hamano
2013-02-27 13:27 ` Antoine Pelisse
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