From: Jeff King <peff@peff•net>
To: Git List <git@vger•kernel.org>
Cc: Junio C Hamano <gitster@pobox•com>, Wink Saville <wink@saville•com>
Subject: [PATCH 11/14] tree-diff: drop list-tail argument to diff_tree_paths()
Date: Thu, 9 Jan 2025 03:51:56 -0500 [thread overview]
Message-ID: <20250109085156.GK2748836@coredump.intra.peff.net> (raw)
In-Reply-To: <20250109082723.GA2748497@coredump.intra.peff.net>
The internals of the path diffing code, including ll_diff_tree_paths(),
all take an extra combine_diff_path parameter which they use as the tail
of a list of results, appending any new entries to it.
The public-facing diff_tree_paths() takes the same argument, but it just
makes the callers more awkward. They always start with a clean list, and
have to set up a fake head struct to pass in.
Let's keep the public API clean by always returning a new list. That
keeps the fake struct as an implementation detail of tree-diff.c.
Signed-off-by: Jeff King <peff@peff•net>
---
combine-diff.c | 9 +++------
diff.h | 2 +-
tree-diff.c | 14 ++++++++------
3 files changed, 12 insertions(+), 13 deletions(-)
diff --git a/combine-diff.c b/combine-diff.c
index f21e1f58ba..9527f3160d 100644
--- a/combine-diff.c
+++ b/combine-diff.c
@@ -1428,22 +1428,19 @@ static struct combine_diff_path *find_paths_multitree(
{
int i, nparent = parents->nr;
const struct object_id **parents_oid;
- struct combine_diff_path paths_head;
+ struct combine_diff_path *paths;
struct strbuf base;
ALLOC_ARRAY(parents_oid, nparent);
for (i = 0; i < nparent; i++)
parents_oid[i] = &parents->oid[i];
- /* fake list head, so worker can assume it is non-NULL */
- paths_head.next = NULL;
-
strbuf_init(&base, PATH_MAX);
- diff_tree_paths(&paths_head, oid, parents_oid, nparent, &base, opt);
+ paths = diff_tree_paths(oid, parents_oid, nparent, &base, opt);
strbuf_release(&base);
free(parents_oid);
- return paths_head.next;
+ return paths;
}
static int match_objfind(struct combine_diff_path *path,
diff --git a/diff.h b/diff.h
index 32ad17fd38..7831ed1a2b 100644
--- a/diff.h
+++ b/diff.h
@@ -462,7 +462,7 @@ const char *diff_line_prefix(struct diff_options *);
extern const char mime_boundary_leader[];
struct combine_diff_path *diff_tree_paths(
- struct combine_diff_path *p, const struct object_id *oid,
+ const struct object_id *oid,
const struct object_id **parents_oid, int nparent,
struct strbuf *base, struct diff_options *opt);
void diff_tree_oid(const struct object_id *old_oid,
diff --git a/tree-diff.c b/tree-diff.c
index 18e5a16716..e99e40da18 100644
--- a/tree-diff.c
+++ b/tree-diff.c
@@ -510,11 +510,14 @@ static struct combine_diff_path *ll_diff_tree_paths(
}
struct combine_diff_path *diff_tree_paths(
- struct combine_diff_path *p, const struct object_id *oid,
+ const struct object_id *oid,
const struct object_id **parents_oid, int nparent,
struct strbuf *base, struct diff_options *opt)
{
- p = ll_diff_tree_paths(p, oid, parents_oid, nparent, base, opt, 0);
+ struct combine_diff_path head, *p;
+ /* fake list head, so worker can assume it is non-NULL */
+ head.next = NULL;
+ p = ll_diff_tree_paths(&head, oid, parents_oid, nparent, base, opt, 0);
return p;
}
@@ -631,14 +634,13 @@ static void ll_diff_tree_oid(const struct object_id *old_oid,
const struct object_id *new_oid,
struct strbuf *base, struct diff_options *opt)
{
- struct combine_diff_path phead, *p;
+ struct combine_diff_path *paths, *p;
pathchange_fn_t pathchange_old = opt->pathchange;
- phead.next = NULL;
opt->pathchange = emit_diff_first_parent_only;
- diff_tree_paths(&phead, new_oid, &old_oid, 1, base, opt);
+ paths = diff_tree_paths(new_oid, &old_oid, 1, base, opt);
- for (p = phead.next; p;) {
+ for (p = paths; p;) {
struct combine_diff_path *pprev = p;
p = p->next;
free(pprev);
--
2.48.0.rc2.413.gc1c80375a3
next prev parent reply other threads:[~2025-01-09 8:51 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-01-03 19:28 [BUGREPORT] git diff-tree --cc SEGFAUTs Wink Saville
2025-01-03 20:46 ` Jeff King
2025-01-03 23:34 ` Wink Saville
2025-01-04 0:31 ` Jeff King
2025-01-04 2:55 ` Junio C Hamano
2025-01-04 3:32 ` Jeff King
2025-01-04 18:09 ` Wink Saville
2025-01-05 22:13 ` Wink Saville
2025-01-09 8:27 ` [PATCH 0/14] combine-diff cleanups Jeff King
2025-01-09 8:28 ` [PATCH 01/14] run_diff_files(): delay allocation of combine_diff_path Jeff King
2025-01-09 17:57 ` Junio C Hamano
2025-01-09 8:32 ` [PATCH 02/14] combine-diff: add combine_diff_path_new() Jeff King
2025-01-09 18:05 ` Junio C Hamano
2025-01-13 15:40 ` Patrick Steinhardt
2025-01-14 9:29 ` Jeff King
2025-01-09 8:33 ` [PATCH 03/14] tree-diff: clear parent array in path_appendnew() Jeff King
2025-01-09 18:28 ` Junio C Hamano
2025-01-10 10:54 ` Jeff King
2025-01-09 8:42 ` [PATCH 04/14] combine-diff: use pointer for parent paths Jeff King
2025-01-09 18:49 ` Junio C Hamano
2025-01-09 8:42 ` [PATCH 05/14] diff: add a comment about combine_diff_path.parent.path Jeff King
2025-01-13 15:40 ` Patrick Steinhardt
2025-01-09 8:44 ` [PATCH 06/14] run_diff_files(): de-mystify the size of combine_diff_path struct Jeff King
2025-01-10 16:40 ` Junio C Hamano
2025-01-09 8:46 ` [PATCH 07/14] tree-diff: drop path_appendnew() alloc optimization Jeff King
2025-01-13 15:40 ` Patrick Steinhardt
2025-01-14 10:30 ` Jeff King
2025-01-09 8:49 ` [PATCH 08/14] tree-diff: pass whole path string to path_appendnew() Jeff King
2025-01-13 15:40 ` Patrick Steinhardt
2025-01-14 9:26 ` Jeff King
2025-01-09 8:49 ` [PATCH 09/14] tree-diff: inline path_appendnew() Jeff King
2025-01-11 0:41 ` Junio C Hamano
2025-01-09 8:50 ` [PATCH 10/14] combine-diff: drop public declaration of combine_diff_path_size() Jeff King
2025-01-09 8:51 ` Jeff King [this message]
2025-01-18 0:33 ` [PATCH 11/14] tree-diff: drop list-tail argument to diff_tree_paths() Junio C Hamano
2025-01-09 8:53 ` [PATCH 12/14] tree-diff: use the name "tail" to refer to list tail Jeff King
2025-01-09 8:54 ` [PATCH 13/14] tree-diff: simplify emit_path() list management Jeff King
2025-01-09 8:57 ` [PATCH 14/14] tree-diff: make list tail-passing more explicit Jeff King
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