The object ID iterator used by the connectivity checks returns the next
object ID via an out-parameter and then uses a return code to indicate
whether an item was found. This is a bit roundabout: instead of a
separate error code, we can just retrun the next object ID directly and
use `NULL` pointers as indicator that the iterator got no items left.
Furthermore, this avoids a copy of the object ID.
Refactor the iterator and all its implementations to return object IDs
directly. While I was honestly hoping for a small speedup given that we
can now avoid a copy, both versions perform the same. Still, the end
result is easier to understand and thus it makes sense to keep this
refactoring regardless.
Signed-off-by: Patrick Steinhardt <ps@xxxxxx>
---
builtin/clone.c | 8 +++-----
builtin/fetch.c | 7 +++----
builtin/receive-pack.c | 17 +++++++----------
connected.c | 15 ++++++++-------
connected.h | 2 +-
fetch-pack.c | 7 +++----
6 files changed, 25 insertions(+), 31 deletions(-)
diff --git a/builtin/clone.c b/builtin/clone.c
index a74558f30c..817a651936 100644
--- a/builtin/clone.c
+++ b/builtin/clone.c
@@ -544,7 +544,7 @@ static void write_followtags(const struct ref *refs, const char *msg)
}
}
-static int iterate_ref_map(void *cb_data, struct object_id *oid)
+static struct object_id *iterate_ref_map(void *cb_data)
{
struct ref **rm = cb_data;
struct ref *ref = *rm;
@@ -555,13 +555,11 @@ static int iterate_ref_map(void *cb_data, struct object_id *oid)
*/
while (ref && !ref->peer_ref)
ref = ref->next;
- /* Returning -1 notes "end of list" to the caller. */
if (!ref)
- return -1;
+ return NULL;
- oidcpy(oid, &ref->old_oid);
*rm = ref->next;
- return 0;
+ return &ref->old_oid;
}
static void update_remote_refs(const struct ref *refs,
diff --git a/builtin/fetch.c b/builtin/fetch.c
index 5fd0f7c791..76ce73ccf5 100644
--- a/builtin/fetch.c
+++ b/builtin/fetch.c
@@ -962,7 +962,7 @@ static int update_local_ref(struct ref *ref,
}
}
-static int iterate_ref_map(void *cb_data, struct object_id *oid)
+static struct object_id *iterate_ref_map(void *cb_data)
{
struct ref **rm = cb_data;
struct ref *ref = *rm;
@@ -970,10 +970,9 @@ static int iterate_ref_map(void *cb_data, struct object_id *oid)
while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
ref = ref->next;
if (!ref)
- return -1; /* end of the list */
+ return NULL;
*rm = ref->next;
- oidcpy(oid, &ref->old_oid);
- return 0;
+ return &ref->old_oid;
}
struct fetch_head {
diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index a419de5b38..0abda033bc 100644
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -1307,7 +1307,7 @@ static void refuse_unconfigured_deny_delete_current(void)
rp_error("%s", _(refuse_unconfigured_deny_delete_current_msg));
}
-static int command_singleton_iterator(void *cb_data, struct object_id *oid);
+static struct object_id *command_singleton_iterator(void *cb_data);
static int update_shallow_ref(struct command *cmd, struct shallow_info *si)
{
struct shallow_lock shallow_lock = SHALLOW_LOCK_INIT;
@@ -1725,16 +1725,15 @@ static void check_aliased_updates(struct command *commands)
string_list_clear(&ref_list, 0);
}
-static int command_singleton_iterator(void *cb_data, struct object_id *oid)
+static struct object_id *command_singleton_iterator(void *cb_data)
{
struct command **cmd_list = cb_data;
struct command *cmd = *cmd_list;
if (!cmd || is_null_oid(&cmd->new_oid))
- return -1; /* end of list */
+ return NULL;
*cmd_list = NULL; /* this returns only one */
- oidcpy(oid, &cmd->new_oid);
- return 0;
+ return &cmd->new_oid;
}
static void set_connectivity_errors(struct command *commands,
@@ -1764,7 +1763,7 @@ struct iterate_data {
struct shallow_info *si;
};
-static int iterate_receive_command_list(void *cb_data, struct object_id *oid)
+static struct object_id *iterate_receive_command_list(void *cb_data)
{
struct iterate_data *data = cb_data;
struct command **cmd_list = &data->cmds;
@@ -1775,13 +1774,11 @@ static int iterate_receive_command_list(void *cb_data, struct object_id *oid)
/* to be checked in update_shallow_ref() */
continue;
if (!is_null_oid(&cmd->new_oid) && !cmd->skip_update) {
- oidcpy(oid, &cmd->new_oid);
*cmd_list = cmd->next;
- return 0;
+ return &cmd->new_oid;
}
}
- *cmd_list = NULL;
- return -1; /* end of list */
+ return NULL;
}
static void reject_updates_to_hidden(struct command *commands)
diff --git a/connected.c b/connected.c
index b5f9523a5f..374b145355 100644
--- a/connected.c
+++ b/connected.c
@@ -24,7 +24,7 @@ int check_connected(oid_iterate_fn fn, void *cb_data,
struct child_process rev_list = CHILD_PROCESS_INIT;
FILE *rev_list_in;
struct check_connected_options defaults = CHECK_CONNECTED_INIT;
- struct object_id oid;
+ struct object_id *oid;
int err = 0;
struct packed_git *new_pack = NULL;
struct transport *transport;
@@ -34,7 +34,8 @@ int check_connected(oid_iterate_fn fn, void *cb_data,
opt = &defaults;
transport = opt->transport;
- if (fn(cb_data, &oid)) {
+ oid = fn(cb_data);
+ if (!oid) {
if (opt->err_fd)
close(opt->err_fd);
return err;
@@ -73,7 +74,7 @@ int check_connected(oid_iterate_fn fn, void *cb_data,
for (p = get_all_packs(the_repository); p; p = p->next) {
if (!p->pack_promisor)
continue;
- if (find_pack_entry_one(oid.hash, p))
+ if (find_pack_entry_one(oid->hash, p))
goto promisor_pack_found;
}
/*
@@ -83,7 +84,7 @@ int check_connected(oid_iterate_fn fn, void *cb_data,
goto no_promisor_pack_found;
promisor_pack_found:
;
- } while (!fn(cb_data, &oid));
+ } while ((oid = fn(cb_data)) != NULL);
return 0;
}
@@ -133,12 +134,12 @@ int check_connected(oid_iterate_fn fn, void *cb_data,
* are sure the ref is good and not sending it to
* rev-list for verification.
*/
- if (new_pack && find_pack_entry_one(oid.hash, new_pack))
+ if (new_pack && find_pack_entry_one(oid->hash, new_pack))
continue;
- if (fprintf(rev_list_in, "%s\n", oid_to_hex(&oid)) < 0)
+ if (fprintf(rev_list_in, "%s\n", oid_to_hex(oid)) < 0)
break;
- } while (!fn(cb_data, &oid));
+ } while ((oid = fn(cb_data)) != NULL);
if (ferror(rev_list_in) || fflush(rev_list_in)) {
if (errno != EPIPE && errno != EINVAL)
diff --git a/connected.h b/connected.h
index 8d5a6b3ad6..56cc95be2d 100644
--- a/connected.h
+++ b/connected.h
@@ -9,7 +9,7 @@ struct transport;
* When called after returning the name for the last object, return -1
* to signal EOF, otherwise return 0.
*/
-typedef int (*oid_iterate_fn)(void *, struct object_id *oid);
+typedef struct object_id *(*oid_iterate_fn)(void *);
/*
* Named-arguments struct for check_connected. All arguments are
diff --git a/fetch-pack.c b/fetch-pack.c
index 0bf7ed7e47..1a6242cd71 100644
--- a/fetch-pack.c
+++ b/fetch-pack.c
@@ -1912,16 +1912,15 @@ static void update_shallow(struct fetch_pack_args *args,
oid_array_clear(&ref);
}
-static int iterate_ref_map(void *cb_data, struct object_id *oid)
+static struct object_id *iterate_ref_map(void *cb_data)
{
struct ref **rm = cb_data;
struct ref *ref = *rm;
if (!ref)
- return -1; /* end of the list */
+ return NULL;
*rm = ref->next;
- oidcpy(oid, &ref->old_oid);
- return 0;
+ return &ref->old_oid;
}
struct ref *fetch_pack(struct fetch_pack_args *args,
--
2.33.0
Attachment:
signature.asc
Description: PGP signature
