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authorJeff King <peff@peff.net>2016-02-11 17:28:36 -0500
committerJunio C Hamano <gitster@pobox.com>2016-02-12 12:51:17 -0800
commitde1e67d0703894cb6ea782e36abb63976ab07e60 (patch)
tree8229efe404fc34d5549d98e06998872919523e85 /revision.h
parentbd64516aca4d4e22acb33c71429d293a14d355cf (diff)
downloadgit-de1e67d0703894cb6ea782e36abb63976ab07e60.tar.gz
list-objects: pass full pathname to callbacksjk/lose-name-path
When we find a blob at "a/b/c", we currently pass this to our show_object_fn callbacks as two components: "a/b/" and "c". Callbacks which want the full value then call path_name(), which concatenates the two. But this is an inefficient interface; the path is a strbuf, and we could simply append "c" to it temporarily, then roll back the length, without creating a new copy. So we could improve this by teaching the callsites of path_name() this trick (and there are only 3). But we can also notice that no callback actually cares about the broken-down representation, and simply pass each callback the full path "a/b/c" as a string. The callback code becomes even simpler, then, as we do not have to worry about freeing an allocated buffer, nor rolling back our modification to the strbuf. This is theoretically less efficient, as some callbacks would not bother to format the final path component. But in practice this is not measurable. Since we use the same strbuf over and over, our work to grow it is amortized, and we really only pay to memcpy a few bytes. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'revision.h')
-rw-r--r--revision.h3
1 files changed, 1 insertions, 2 deletions
diff --git a/revision.h b/revision.h
index 7beab15248..dca0d38171 100644
--- a/revision.h
+++ b/revision.h
@@ -259,8 +259,7 @@ extern void mark_tree_uninteresting(struct tree *tree);
char *path_name(struct strbuf *path, const char *name);
-extern void show_object_with_name(FILE *, struct object *,
- struct strbuf *, const char *);
+extern void show_object_with_name(FILE *, struct object *, const char *);
extern void add_pending_object(struct rev_info *revs,
struct object *obj, const char *name);