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hash: provide per-algorithm null OIDs 

Up until recently, object IDs did not have an algorithm member, only a
hash.  Consequently, it was possible to share one null (all-zeros)
object ID among all hash algorithms.  Now that we're going to be
handling objects from multiple hash algorithms, it's important to make
sure that all object IDs have a correct algorithm field.

Introduce a per-algorithm null OID, and add it to struct hash_algo.
Introduce a wrapper function as well, and use it everywhere we used to
use the null_oid constant.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
brian m. carlson 2021-04-26 01:02:56 +00:00 committed by Junio C Hamano
parent 5a6dce70d7
commit 14228447c9
42 changed files with 119 additions and 95 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
archive.c
View File

@ -275,9 +275,11 @@ int write_archive_entries(struct archiver_args *args,
int err;
struct strbuf path_in_archive = STRBUF_INIT;
struct strbuf content = STRBUF_INIT;
struct object_id fake_oid = null_oid;
struct object_id fake_oid;
int i;
oidcpy(&fake_oid, null_oid());
if (args->baselen > 0 && args->base[args->baselen - 1] == '/') {
size_t len = args->baselen;

2
blame.c
View File

@ -242,7 +242,7 @@ static struct commit *fake_working_tree_commit(struct repository *r,
switch (st.st_mode & S_IFMT) {
case S_IFREG:
if (opt->flags.allow_textconv &&
textconv_object(r, read_from, mode, &null_oid, 0, &buf_ptr, &buf_len))
textconv_object(r, read_from, mode, null_oid(), 0, &buf_ptr, &buf_len))
strbuf_attach(&buf, buf_ptr, buf_len, buf_len + 1);
else if (strbuf_read_file(&buf, read_from, st.st_size) != st.st_size)
die_errno("cannot open or read '%s'", read_from);

2
branch.c
View File

@ -322,7 +322,7 @@ void create_branch(struct repository *r,
transaction = ref_transaction_begin(&err);
if (!transaction ||
ref_transaction_update(transaction, ref.buf,
&oid, forcing ? NULL : &null_oid,
&oid, forcing ? NULL : null_oid(),
0, msg, &err) ||
ref_transaction_commit(transaction, &err))
die("%s", err.buf);

6
builtin/checkout.c
View File

@ -106,8 +106,8 @@ static int post_checkout_hook(struct commit *old_commit, struct commit *new_comm
int changed)
{
return run_hook_le(NULL, "post-checkout",
oid_to_hex(old_commit ? &old_commit->object.oid : &null_oid),
oid_to_hex(new_commit ? &new_commit->object.oid : &null_oid),
oid_to_hex(old_commit ? &old_commit->object.oid : null_oid()),
oid_to_hex(new_commit ? &new_commit->object.oid : null_oid()),
changed ? "1" : "0", NULL);
/* "new_commit" can be NULL when checking out from the index before
a commit exists. */
@ -638,7 +638,7 @@ static int reset_tree(struct tree *tree, const struct checkout_opts *o,
opts.src_index = &the_index;
opts.dst_index = &the_index;
init_checkout_metadata(&opts.meta, info->refname,
info->commit ? &info->commit->object.oid : &null_oid,
info->commit ? &info->commit->object.oid : null_oid(),
NULL);
parse_tree(tree);
init_tree_desc(&tree_desc, tree->buffer, tree->size);

2
builtin/clone.c
View File

@ -820,7 +820,7 @@ static int checkout(int submodule_progress)
if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
die(_("unable to write new index file"));
err |= run_hook_le(NULL, "post-checkout", oid_to_hex(&null_oid),
err |= run_hook_le(NULL, "post-checkout", oid_to_hex(null_oid()),
oid_to_hex(&oid), "1", NULL);
if (!err && (option_recurse_submodules.nr > 0)) {

2
builtin/describe.c
View File

@ -502,7 +502,7 @@ static void describe_blob(struct object_id oid, struct strbuf *dst)
{
struct rev_info revs;
struct strvec args = STRVEC_INIT;
struct process_commit_data pcd = { null_oid, oid, dst, &revs};
struct process_commit_data pcd = { *null_oid(), oid, dst, &revs};
strvec_pushl(&args, "internal: The first arg is not parsed",
"--objects", "--in-commit-order", "--reverse", "HEAD",

2
builtin/diff.c
View File

@ -98,7 +98,7 @@ static int builtin_diff_b_f(struct rev_info *revs,
stuff_change(&revs->diffopt,
blob[0]->mode, canon_mode(st.st_mode),
&blob[0]->item->oid, &null_oid,
&blob[0]->item->oid, null_oid(),
1, 0,
blob[0]->path ? blob[0]->path : path,
path);

10
builtin/fast-export.c
View File

@ -870,7 +870,7 @@ static void handle_tag(const char *name, struct tag *tag)
p = rewrite_commit((struct commit *)tagged);
if (!p) {
printf("reset %s\nfrom %s\n\n",
name, oid_to_hex(&null_oid));
name, oid_to_hex(null_oid()));
free(buf);
return;
}
@ -884,7 +884,7 @@ static void handle_tag(const char *name, struct tag *tag)
if (tagged->type == OBJ_TAG) {
printf("reset %s\nfrom %s\n\n",
name, oid_to_hex(&null_oid));
name, oid_to_hex(null_oid()));
}
skip_prefix(name, "refs/tags/", &name);
printf("tag %s\n", name);
@ -1016,7 +1016,7 @@ static void handle_tags_and_duplicates(struct string_list *extras)
* it.
*/
printf("reset %s\nfrom %s\n\n",
name, oid_to_hex(&null_oid));
name, oid_to_hex(null_oid()));
continue;
}
@ -1035,7 +1035,7 @@ static void handle_tags_and_duplicates(struct string_list *extras)
if (!reference_excluded_commits) {
/* delete the ref */
printf("reset %s\nfrom %s\n\n",
name, oid_to_hex(&null_oid));
name, oid_to_hex(null_oid()));
continue;
}
/* set ref to commit using oid, not mark */
@ -1146,7 +1146,7 @@ static void handle_deletes(void)
continue;
printf("reset %s\nfrom %s\n\n",
refspec->dst, oid_to_hex(&null_oid));
refspec->dst, oid_to_hex(null_oid()));
}
}

2
builtin/grep.c
View File

@ -421,7 +421,7 @@ static int grep_submodule(struct grep_opt *opt,
struct grep_opt subopt;
int hit;
sub = submodule_from_path(superproject, &null_oid, path);
sub = submodule_from_path(superproject, null_oid(), path);
if (!is_submodule_active(superproject, path))
return 0;

2
builtin/ls-files.c
View File

@ -210,7 +210,7 @@ static void show_submodule(struct repository *superproject,
{
struct repository subrepo;
const struct submodule *sub = submodule_from_path(superproject,
&null_oid, path);
null_oid(), path);
if (repo_submodule_init(&subrepo, superproject, sub))
return;

4
builtin/rebase.c
View File

@ -485,7 +485,7 @@ static const char * const builtin_rebase_interactive_usage[] = {
int cmd_rebase__interactive(int argc, const char **argv, const char *prefix)
{
struct rebase_options opts = REBASE_OPTIONS_INIT;
struct object_id squash_onto = null_oid;
struct object_id squash_onto = *null_oid();
enum action command = ACTION_NONE;
struct option options[] = {
OPT_NEGBIT(0, "ff", &opts.flags, N_("allow fast-forward"),
@ -1139,7 +1139,7 @@ static int can_fast_forward(struct commit *onto, struct commit *upstream,
merge_bases = get_merge_bases(onto, head);
if (!merge_bases || merge_bases->next) {
oidcpy(merge_base, &null_oid);
oidcpy(merge_base, null_oid());
goto done;
}

2
builtin/receive-pack.c
View File

@ -329,7 +329,7 @@ static void write_head_info(void)
for_each_alternate_ref(show_one_alternate_ref, &seen);
oidset_clear(&seen);
if (!sent_capabilities)
show_ref("capabilities^{}", &null_oid);
show_ref("capabilities^{}", null_oid());
advertise_shallow_grafts(1);

29
builtin/submodule--helper.c
View File

@ -426,7 +426,8 @@ static int module_list(int argc, const char **argv, const char *prefix)
const struct cache_entry *ce = list.entries[i];
if (ce_stage(ce))
printf("%06o %s U\t", ce->ce_mode, oid_to_hex(&null_oid));
printf("%06o %s U\t", ce->ce_mode,
oid_to_hex(null_oid()));
else
printf("%06o %s %d\t", ce->ce_mode,
oid_to_hex(&ce->oid), ce_stage(ce));
@ -466,7 +467,7 @@ static void runcommand_in_submodule_cb(const struct cache_entry *list_item,
displaypath = get_submodule_displaypath(path, info->prefix);
sub = submodule_from_path(the_repository, &null_oid, path);
sub = submodule_from_path(the_repository, null_oid(), path);
if (!sub)
die(_("No url found for submodule path '%s' in .gitmodules"),
@ -623,7 +624,7 @@ static void init_submodule(const char *path, const char *prefix,
displaypath = get_submodule_displaypath(path, prefix);
sub = submodule_from_path(the_repository, &null_oid, path);
sub = submodule_from_path(the_repository, null_oid(), path);
if (!sub)
die(_("No url found for submodule path '%s' in .gitmodules"),
@ -783,14 +784,14 @@ static void status_submodule(const char *path, const struct object_id *ce_oid,
struct strbuf buf = STRBUF_INIT;
const char *git_dir;
if (!submodule_from_path(the_repository, &null_oid, path))
if (!submodule_from_path(the_repository, null_oid(), path))
die(_("no submodule mapping found in .gitmodules for path '%s'"),
path);
displaypath = get_submodule_displaypath(path, prefix);
if ((CE_STAGEMASK & ce_flags) >> CE_STAGESHIFT) {
print_status(flags, 'U', path, &null_oid, displaypath);
print_status(flags, 'U', path, null_oid(), displaypath);
goto cleanup;
}
@ -916,7 +917,7 @@ static int module_name(int argc, const char **argv, const char *prefix)
if (argc != 2)
usage(_("git submodule--helper name <path>"));
sub = submodule_from_path(the_repository, &null_oid, argv[1]);
sub = submodule_from_path(the_repository, null_oid(), argv[1]);
if (!sub)
die(_("no submodule mapping found in .gitmodules for path '%s'"),
@ -1040,7 +1041,7 @@ static void generate_submodule_summary(struct summary_cb *info,
char *errmsg = NULL;
int total_commits = -1;
if (!info->cached && oideq(&p->oid_dst, &null_oid)) {
if (!info->cached && oideq(&p->oid_dst, null_oid())) {
if (S_ISGITLINK(p->mod_dst)) {
struct ref_store *refs = get_submodule_ref_store(p->sm_path);
if (refs)
@ -1177,7 +1178,7 @@ static void prepare_submodule_summary(struct summary_cb *info,
if (info->for_status && p->status != 'A' &&
(sub = submodule_from_path(the_repository,
&null_oid, p->sm_path))) {
null_oid(), p->sm_path))) {
char *config_key = NULL;
const char *value;
int ignore_all = 0;
@ -1373,7 +1374,7 @@ static void sync_submodule(const char *path, const char *prefix,
if (!is_submodule_active(the_repository, path))
return;
sub = submodule_from_path(the_repository, &null_oid, path);
sub = submodule_from_path(the_repository, null_oid(), path);
if (sub && sub->url) {
if (starts_with_dot_dot_slash(sub->url) ||
@ -1525,7 +1526,7 @@ static void deinit_submodule(const char *path, const char *prefix,
struct strbuf sb_config = STRBUF_INIT;
char *sub_git_dir = xstrfmt("%s/.git", path);
sub = submodule_from_path(the_repository, &null_oid, path);
sub = submodule_from_path(the_repository, null_oid(), path);
if (!sub || !sub->name)
goto cleanup;
@ -1925,7 +1926,7 @@ static void determine_submodule_update_strategy(struct repository *r,
const char *update,
struct submodule_update_strategy *out)
{
const struct submodule *sub = submodule_from_path(r, &null_oid, path);
const struct submodule *sub = submodule_from_path(r, null_oid(), path);
char *key;
const char *val;
@ -2077,7 +2078,7 @@ static int prepare_to_clone_next_submodule(const struct cache_entry *ce,
goto cleanup;
}
sub = submodule_from_path(the_repository, &null_oid, ce->name);
sub = submodule_from_path(the_repository, null_oid(), ce->name);
if (suc->recursive_prefix)
displaypath = relative_path(suc->recursive_prefix,
@ -2395,7 +2396,7 @@ static const char *remote_submodule_branch(const char *path)
const char *branch = NULL;
char *key;
sub = submodule_from_path(the_repository, &null_oid, path);
sub = submodule_from_path(the_repository, null_oid(), path);
if (!sub)
return NULL;
@ -2533,7 +2534,7 @@ static int ensure_core_worktree(int argc, const char **argv, const char *prefix)
path = argv[1];
sub = submodule_from_path(the_repository, &null_oid, path);
sub = submodule_from_path(the_repository, null_oid(), path);
if (!sub)
BUG("We could get the submodule handle before?");

3
builtin/unpack-objects.c
View File

@ -421,7 +421,8 @@ static void unpack_delta_entry(enum object_type type, unsigned long delta_size,
* has not been resolved yet.
*/
oidclr(&obj_list[nr].oid);
add_delta_to_list(nr, &null_oid, base_offset, delta_data, delta_size);
add_delta_to_list(nr, null_oid(), base_offset,
delta_data, delta_size);
return;
}
}

4
builtin/worktree.c
View File

@ -331,7 +331,7 @@ static int add_worktree(const char *path, const char *refname,
*/
strbuf_reset(&sb);
strbuf_addf(&sb, "%s/HEAD", sb_repo.buf);
write_file(sb.buf, "%s", oid_to_hex(&null_oid));
write_file(sb.buf, "%s", oid_to_hex(null_oid()));
strbuf_reset(&sb);
strbuf_addf(&sb, "%s/commondir", sb_repo.buf);
write_file(sb.buf, "../..");
@ -394,7 +394,7 @@ done:
cp.argv = NULL;
cp.trace2_hook_name = "post-checkout";
strvec_pushl(&cp.args, absolute_path(hook),
oid_to_hex(&null_oid),
oid_to_hex(null_oid()),
oid_to_hex(&commit->object.oid),
"1", NULL);
ret = run_command(&cp);

2
combine-diff.c
View File

@ -1068,7 +1068,7 @@ static void show_patch_diff(struct combine_diff_path *elem, int num_parent,
&result_size, NULL, NULL);
} else if (textconv) {
struct diff_filespec *df = alloc_filespec(elem->path);
fill_filespec(df, &null_oid, 0, st.st_mode);
fill_filespec(df, null_oid(), 0, st.st_mode);
result_size = fill_textconv(opt->repo, textconv, df, &result);
free_filespec(df);
} else if (0 <= (fd = open(elem->path, O_RDONLY))) {

2
connect.c
View File

@ -254,7 +254,7 @@ static int process_dummy_ref(const struct packet_reader *reader)
return 0;
name++;
return oideq(&null_oid, &oid) && !strcmp(name, "capabilities^{}");
return oideq(null_oid(), &oid) && !strcmp(name, "capabilities^{}");
}
static void check_no_capabilities(const char *line, int len)

6
diff-lib.c
View File

@ -232,7 +232,7 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
ce_intent_to_add(ce)) {
newmode = ce_mode_from_stat(ce, st.st_mode);
diff_addremove(&revs->diffopt, '+', newmode,
&null_oid, 0, ce->name, 0);
null_oid(), 0, ce->name, 0);
continue;
}
@ -249,7 +249,7 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
}
oldmode = ce->ce_mode;
old_oid = &ce->oid;
new_oid = changed ? &null_oid : &ce->oid;
new_oid = changed ? null_oid() : &ce->oid;
diff_change(&revs->diffopt, oldmode, newmode,
old_oid, new_oid,
!is_null_oid(old_oid),
@ -307,7 +307,7 @@ static int get_stat_data(const struct index_state *istate,
0, dirty_submodule);
if (changed) {
mode = ce_mode_from_stat(ce, st.st_mode);
oid = &null_oid;
oid = null_oid();
}
}

2
diff-no-index.c
View File

@ -83,7 +83,7 @@ static struct diff_filespec *noindex_filespec(const char *name, int mode)
if (!name)
name = "/dev/null";
s = alloc_filespec(name);
fill_filespec(s, &null_oid, 0, mode);
fill_filespec(s, null_oid(), 0, mode);
if (name == file_from_standard_input)
populate_from_stdin(s);
return s;

4
diff.c
View File

@ -4190,7 +4190,7 @@ static struct diff_tempfile *prepare_temp_file(struct repository *r,
die_errno("readlink(%s)", name);
prep_temp_blob(r->index, name, temp, sb.buf, sb.len,
(one->oid_valid ?
&one->oid : &null_oid),
&one->oid : null_oid()),
(one->oid_valid ?
one->mode : S_IFLNK));
strbuf_release(&sb);
@ -4199,7 +4199,7 @@ static struct diff_tempfile *prepare_temp_file(struct repository *r,
/* we can borrow from the file in the work tree */
temp->name = name;
if (!one->oid_valid)
oid_to_hex_r(temp->hex, &null_oid);
oid_to_hex_r(temp->hex, null_oid());
else
oid_to_hex_r(temp->hex, &one->oid);
/* Even though we may sometimes borrow the

2
dir.c
View File

@ -3556,7 +3556,7 @@ static void connect_wt_gitdir_in_nested(const char *sub_worktree,
*/
i++;
sub = submodule_from_path(&subrepo, &null_oid, ce->name);
sub = submodule_from_path(&subrepo, null_oid(), ce->name);
if (!sub || !is_submodule_active(&subrepo, ce->name))
/* .gitmodules broken or inactive sub */
continue;

2
grep.c
View File

@ -1494,7 +1494,7 @@ static int fill_textconv_grep(struct repository *r,
fill_filespec(df, gs->identifier, 1, 0100644);
break;
case GREP_SOURCE_FILE:
fill_filespec(df, &null_oid, 0, 0100644);
fill_filespec(df, null_oid(), 0, 0100644);
break;
default:
BUG("attempt to textconv something without a path?");

7
hash.h
View File

@ -170,6 +170,9 @@ struct git_hash_algo {
/* The OID of the empty blob. */
const struct object_id *empty_blob;
/* The all-zeros OID. */
const struct object_id *null_oid;
};
extern const struct git_hash_algo hash_algos[GIT_HASH_NALGOS];
@ -190,7 +193,7 @@ static inline int hash_algo_by_ptr(const struct git_hash_algo *p)
#define the_hash_algo the_repository->hash_algo
extern const struct object_id null_oid;
const struct object_id *null_oid(void);
static inline int hashcmp_algop(const unsigned char *sha1, const unsigned char *sha2, const struct git_hash_algo *algop)
{
@ -246,7 +249,7 @@ static inline int oideq(const struct object_id *oid1, const struct object_id *oi
static inline int is_null_oid(const struct object_id *oid)
{
return oideq(oid, &null_oid);
return oideq(oid, null_oid());
}
static inline void hashcpy(unsigned char *sha_dst, const unsigned char *sha_src)

2
log-tree.c
View File

@ -419,7 +419,7 @@ void log_write_email_headers(struct rev_info *opt, struct commit *commit,
{
const char *extra_headers = opt->extra_headers;
const char *name = oid_to_hex(opt->zero_commit ?
&null_oid : &commit->object.oid);
null_oid() : &commit->object.oid);
*need_8bit_cte_p = 0; /* unknown */

20
merge-ort.c
View File

@ -1291,7 +1291,7 @@ static int handle_content_merge(struct merge_options *opt,
two_way = ((S_IFMT & o->mode) != (S_IFMT & a->mode));
merge_status = merge_3way(opt, path,
two_way ? &null_oid : &o->oid,
two_way ? null_oid() : &o->oid,
&a->oid, &b->oid,
pathnames, extra_marker_size,
&result_buf);
@ -1313,7 +1313,7 @@ static int handle_content_merge(struct merge_options *opt,
} else if (S_ISGITLINK(a->mode)) {
int two_way = ((S_IFMT & o->mode) != (S_IFMT & a->mode));
clean = merge_submodule(opt, pathnames[0],
two_way ? &null_oid : &o->oid,
two_way ? null_oid() : &o->oid,
&a->oid, &b->oid, &result->oid);
if (opt->priv->call_depth && two_way && !clean) {
result->mode = o->mode;
@ -2123,7 +2123,7 @@ static int process_renames(struct merge_options *opt,
if (type_changed) {
/* rename vs. typechange */
/* Mark the original as resolved by removal */
memcpy(&oldinfo->stages[0].oid, &null_oid,
memcpy(&oldinfo->stages[0].oid, null_oid(),
sizeof(oldinfo->stages[0].oid));
oldinfo->stages[0].mode = 0;
oldinfo->filemask &= 0x06;
@ -2762,7 +2762,7 @@ static void process_entry(struct merge_options *opt,
if (ci->filemask & (1 << i))
continue;
ci->stages[i].mode = 0;
oidcpy(&ci->stages[i].oid, &null_oid);
oidcpy(&ci->stages[i].oid, null_oid());
}
} else if (ci->df_conflict && ci->merged.result.mode != 0) {
/*
@ -2808,7 +2808,7 @@ static void process_entry(struct merge_options *opt,
continue;
/* zero out any entries related to directories */
new_ci->stages[i].mode = 0;
oidcpy(&new_ci->stages[i].oid, &null_oid);
oidcpy(&new_ci->stages[i].oid, null_oid());
}
/*
@ -2909,11 +2909,11 @@ static void process_entry(struct merge_options *opt,
new_ci->merged.result.mode = ci->stages[2].mode;
oidcpy(&new_ci->merged.result.oid, &ci->stages[2].oid);
new_ci->stages[1].mode = 0;
oidcpy(&new_ci->stages[1].oid, &null_oid);
oidcpy(&new_ci->stages[1].oid, null_oid());
new_ci->filemask = 5;
if ((S_IFMT & b_mode) != (S_IFMT & o_mode)) {
new_ci->stages[0].mode = 0;
oidcpy(&new_ci->stages[0].oid, &null_oid);
oidcpy(&new_ci->stages[0].oid, null_oid());
new_ci->filemask = 4;
}
@ -2921,11 +2921,11 @@ static void process_entry(struct merge_options *opt,
ci->merged.result.mode = ci->stages[1].mode;
oidcpy(&ci->merged.result.oid, &ci->stages[1].oid);
ci->stages[2].mode = 0;
oidcpy(&ci->stages[2].oid, &null_oid);
oidcpy(&ci->stages[2].oid, null_oid());
ci->filemask = 3;
if ((S_IFMT & a_mode) != (S_IFMT & o_mode)) {
ci->stages[0].mode = 0;
oidcpy(&ci->stages[0].oid, &null_oid);
oidcpy(&ci->stages[0].oid, null_oid());
ci->filemask = 2;
}
@ -3042,7 +3042,7 @@ static void process_entry(struct merge_options *opt,
/* Deleted on both sides */
ci->merged.is_null = 1;
ci->merged.result.mode = 0;
oidcpy(&ci->merged.result.oid, &null_oid);
oidcpy(&ci->merged.result.oid, null_oid());
ci->merged.clean = !ci->path_conflict;
}

10
merge-recursive.c
View File

@ -486,7 +486,7 @@ static int get_tree_entry_if_blob(struct repository *r,
ret = get_tree_entry(r, tree, path, &dfs->oid, &dfs->mode);
if (S_ISDIR(dfs->mode)) {
oidcpy(&dfs->oid, &null_oid);
oidcpy(&dfs->oid, null_oid());
dfs->mode = 0;
}
return ret;
@ -1604,7 +1604,7 @@ static int handle_file_collision(struct merge_options *opt,
/* Store things in diff_filespecs for functions that need it */
null.path = (char *)collide_path;
oidcpy(&null.oid, &null_oid);
oidcpy(&null.oid, null_oid());
null.mode = 0;
if (merge_mode_and_contents(opt, &null, a, b, collide_path,
@ -2789,11 +2789,11 @@ static int process_renames(struct merge_options *opt,
dst_other.mode = ren1->dst_entry->stages[other_stage].mode;
try_merge = 0;
if (oideq(&src_other.oid, &null_oid) &&
if (oideq(&src_other.oid, null_oid()) &&
ren1->dir_rename_original_type == 'A') {
setup_rename_conflict_info(RENAME_VIA_DIR,
opt, ren1, NULL);
} else if (oideq(&src_other.oid, &null_oid)) {
} else if (oideq(&src_other.oid, null_oid())) {
setup_rename_conflict_info(RENAME_DELETE,
opt, ren1, NULL);
} else if ((dst_other.mode == ren1->pair->two->mode) &&
@ -2812,7 +2812,7 @@ static int process_renames(struct merge_options *opt,
1, /* update_cache */
0 /* update_wd */))
clean_merge = -1;
} else if (!oideq(&dst_other.oid, &null_oid)) {
} else if (!oideq(&dst_other.oid, null_oid())) {
/*
* Probably not a clean merge, but it's
* premature to set clean_merge to 0 here,

2
notes-merge.c
View File

@ -600,7 +600,7 @@ int notes_merge(struct notes_merge_options *o,
/* Find merge bases */
bases = get_merge_bases(local, remote);
if (!bases) {
base_oid = &null_oid;
base_oid = null_oid();
base_tree_oid = the_hash_algo->empty_tree;
if (o->verbosity >= 4)
printf("No merge base found; doing history-less merge\n");

2
notes.c
View File

@ -1327,7 +1327,7 @@ int copy_note(struct notes_tree *t,
if (note)
return add_note(t, to_obj, note, combine_notes);
else if (existing_note)
return add_note(t, to_obj, &null_oid, combine_notes);
return add_note(t, to_obj, null_oid(), combine_notes);
return 0;
}

17
object-file.c
View File

@ -55,7 +55,6 @@
"\x6f\xe1\x41\xf7\x74\x91\x20\xa3\x03\x72" \
"\x18\x13"
const struct object_id null_oid;
static const struct object_id empty_tree_oid = {
.hash = EMPTY_TREE_SHA1_BIN_LITERAL,
.algo = GIT_HASH_SHA1,
@ -64,6 +63,10 @@ static const struct object_id empty_blob_oid = {
.hash = EMPTY_BLOB_SHA1_BIN_LITERAL,
.algo = GIT_HASH_SHA1,
};
static const struct object_id null_oid_sha1 = {
.hash = {0},
.algo = GIT_HASH_SHA1,
};
static const struct object_id empty_tree_oid_sha256 = {
.hash = EMPTY_TREE_SHA256_BIN_LITERAL,
.algo = GIT_HASH_SHA256,
@ -72,6 +75,10 @@ static const struct object_id empty_blob_oid_sha256 = {
.hash = EMPTY_BLOB_SHA256_BIN_LITERAL,
.algo = GIT_HASH_SHA256,
};
static const struct object_id null_oid_sha256 = {
.hash = {0},
.algo = GIT_HASH_SHA256,
};
static void git_hash_sha1_init(git_hash_ctx *ctx)
{
@ -172,6 +179,7 @@ const struct git_hash_algo hash_algos[GIT_HASH_NALGOS] = {
git_hash_unknown_final_oid,
NULL,
NULL,
NULL,
},
{
"sha1",
@ -187,6 +195,7 @@ const struct git_hash_algo hash_algos[GIT_HASH_NALGOS] = {
git_hash_sha1_final_oid,
&empty_tree_oid,
&empty_blob_oid,
&null_oid_sha1,
},
{
"sha256",
@ -202,9 +211,15 @@ const struct git_hash_algo hash_algos[GIT_HASH_NALGOS] = {
git_hash_sha256_final_oid,
&empty_tree_oid_sha256,
&empty_blob_oid_sha256,
&null_oid_sha256,
}
};
const struct object_id *null_oid(void)
{
return the_hash_algo->null_oid;
}
const char *empty_tree_oid_hex(void)
{
static char buf[GIT_MAX_HEXSZ + 1];

2
parse-options-cb.c
View File

@ -140,7 +140,7 @@ int parse_opt_object_id(const struct option *opt, const char *arg, int unset)
struct object_id *target = opt->value;
if (unset) {
*target = null_oid;
oidcpy(target, null_oid());
return 0;
}
if (!arg)

2
range-diff.c
View File

@ -445,7 +445,7 @@ static struct diff_filespec *get_filespec(const char *name, const char *p)
{
struct diff_filespec *spec = alloc_filespec(name);
fill_filespec(spec, &null_oid, 0, 0100644);
fill_filespec(spec, null_oid(), 0, 0100644);
spec->data = (char *)p;
spec->size = strlen(p);
spec->should_munmap = 0;

4
refs.c
View File

@ -1107,7 +1107,7 @@ int ref_transaction_create(struct ref_transaction *transaction,
if (!new_oid || is_null_oid(new_oid))
BUG("create called without valid new_oid");
return ref_transaction_update(transaction, refname, new_oid,
&null_oid, flags, msg, err);
null_oid(), flags, msg, err);
}
int ref_transaction_delete(struct ref_transaction *transaction,
@ -1119,7 +1119,7 @@ int ref_transaction_delete(struct ref_transaction *transaction,
if (old_oid && is_null_oid(old_oid))
BUG("delete called with old_oid set to zeros");
return ref_transaction_update(transaction, refname,
&null_oid, old_oid,
null_oid(), old_oid,
flags, msg, err);
}

2
refs/debug.c
View File

@ -243,7 +243,7 @@ static int debug_read_raw_ref(struct ref_store *ref_store, const char *refname,
struct debug_ref_store *drefs = (struct debug_ref_store *)ref_store;
int res = 0;
oidcpy(oid, &null_oid);
oidcpy(oid, null_oid());
res = drefs->refs->be->read_raw_ref(drefs->refs, refname, oid, referent,
type);

2
refs/files-backend.c
View File

@ -1084,7 +1084,7 @@ static void prune_ref(struct files_ref_store *refs, struct ref_to_prune *r)
ref_transaction_add_update(
transaction, r->name,
REF_NO_DEREF | REF_HAVE_NEW | REF_HAVE_OLD | REF_IS_PRUNING,
&null_oid, &r->oid, NULL);
null_oid(), &r->oid, NULL);
if (ref_transaction_commit(transaction, &err))
goto cleanup;

2
reset.c
View File

@ -128,7 +128,7 @@ reset_head_refs:
}
if (run_hook)
run_hook_le(NULL, "post-checkout",
oid_to_hex(orig ? orig : &null_oid),
oid_to_hex(orig ? orig : null_oid()),
oid_to_hex(oid), "1", NULL);
leave_reset_head:

4
sequencer.c
View File

@ -524,7 +524,7 @@ static int fast_forward_to(struct repository *r,
if (!transaction ||
ref_transaction_update(transaction, "HEAD",
to, unborn && !is_rebase_i(opts) ?
&null_oid : from,
null_oid() : from,
0, sb.buf, &err) ||
ref_transaction_commit(transaction, &err)) {
ref_transaction_free(transaction);
@ -1131,7 +1131,7 @@ int update_head_with_reflog(const struct commit *old_head,
transaction = ref_transaction_begin(err);
if (!transaction ||
ref_transaction_update(transaction, "HEAD", new_head,
old_head ? &old_head->object.oid : &null_oid,
old_head ? &old_head->object.oid : null_oid(),
0, sb.buf, err) ||
ref_transaction_commit(transaction, err)) {
ret = -1;

2
submodule-config.c
View File

@ -671,7 +671,7 @@ static int gitmodules_cb(const char *var, const char *value, void *data)
parameter.cache = repo->submodule_cache;
parameter.treeish_name = NULL;
parameter.gitmodules_oid = &null_oid;
parameter.gitmodules_oid = null_oid();
parameter.overwrite = 1;
return parse_config(var, value, &parameter);

26
submodule.c
View File

@ -113,7 +113,7 @@ int update_path_in_gitmodules(const char *oldpath, const char *newpath)
if (is_gitmodules_unmerged(the_repository->index))
die(_("Cannot change unmerged .gitmodules, resolve merge conflicts first"));
submodule = submodule_from_path(the_repository, &null_oid, oldpath);
submodule = submodule_from_path(the_repository, null_oid(), oldpath);
if (!submodule || !submodule->name) {
warning(_("Could not find section in .gitmodules where path=%s"), oldpath);
return -1;
@ -142,7 +142,7 @@ int remove_path_from_gitmodules(const char *path)
if (is_gitmodules_unmerged(the_repository->index))
die(_("Cannot change unmerged .gitmodules, resolve merge conflicts first"));
submodule = submodule_from_path(the_repository, &null_oid, path);
submodule = submodule_from_path(the_repository, null_oid(), path);
if (!submodule || !submodule->name) {
warning(_("Could not find section in .gitmodules where path=%s"), path);
return -1;
@ -188,7 +188,8 @@ void set_diffopt_flags_from_submodule_config(struct diff_options *diffopt,
const char *path)
{
const struct submodule *submodule = submodule_from_path(the_repository,
&null_oid, path);
null_oid(),
path);
if (submodule) {
const char *ignore;
char *key;
@ -244,7 +245,7 @@ int is_submodule_active(struct repository *repo, const char *path)
const struct string_list *sl;
const struct submodule *module;
module = submodule_from_path(repo, &null_oid, path);
module = submodule_from_path(repo, null_oid(), path);
/* early return if there isn't a path->module mapping */
if (!module)
@ -745,7 +746,7 @@ const struct submodule *submodule_from_ce(const struct cache_entry *ce)
if (!should_update_submodules())
return NULL;
return submodule_from_path(the_repository, &null_oid, ce->name);
return submodule_from_path(the_repository, null_oid(), ce->name);
}
static struct oid_array *submodule_commits(struct string_list *submodules,
@ -1037,7 +1038,7 @@ int find_unpushed_submodules(struct repository *r,
const struct submodule *submodule;
const char *path = NULL;
submodule = submodule_from_name(r, &null_oid, name->string);
submodule = submodule_from_name(r, null_oid(), name->string);
if (submodule)
path = submodule->path;
else
@ -1224,7 +1225,7 @@ static void calculate_changed_submodule_paths(struct repository *r,
const struct submodule *submodule;
const char *path = NULL;
submodule = submodule_from_name(r, &null_oid, name->string);
submodule = submodule_from_name(r, null_oid(), name->string);
if (submodule)
path = submodule->path;
else
@ -1361,7 +1362,7 @@ static struct fetch_task *fetch_task_create(struct repository *r,
struct fetch_task *task = xmalloc(sizeof(*task));
memset(task, 0, sizeof(*task));
task->sub = submodule_from_path(r, &null_oid, path);
task->sub = submodule_from_path(r, null_oid(), path);
if (!task->sub) {
/*
* No entry in .gitmodules? Technically not a submodule,
@ -1917,7 +1918,7 @@ int submodule_move_head(const char *path,
if (old_head && !is_submodule_populated_gently(path, error_code_ptr))
return 0;
sub = submodule_from_path(the_repository, &null_oid, path);
sub = submodule_from_path(the_repository, null_oid(), path);
if (!sub)
BUG("could not get submodule information for '%s'", path);
@ -2076,7 +2077,7 @@ static void relocate_single_git_dir_into_superproject(const char *path)
real_old_git_dir = real_pathdup(old_git_dir, 1);
sub = submodule_from_path(the_repository, &null_oid, path);
sub = submodule_from_path(the_repository, null_oid(), path);
if (!sub)
die(_("could not lookup name for submodule '%s'"), path);
@ -2135,7 +2136,7 @@ void absorb_git_dir_into_superproject(const char *path,
* superproject did not rewrite the git file links yet,
* fix it now.
*/
sub = submodule_from_path(the_repository, &null_oid, path);
sub = submodule_from_path(the_repository, null_oid(), path);
if (!sub)
die(_("could not lookup name for submodule '%s'"), path);
connect_work_tree_and_git_dir(path,
@ -2283,7 +2284,8 @@ int submodule_to_gitdir(struct strbuf *buf, const char *submodule)
strbuf_addstr(buf, git_dir);
}
if (!is_git_directory(buf->buf)) {
sub = submodule_from_path(the_repository, &null_oid, submodule);
sub = submodule_from_path(the_repository, null_oid(),
submodule);
if (!sub) {
ret = -1;
goto cleanup;

2
t/helper/test-submodule-nested-repo-config.c
View File

@ -18,7 +18,7 @@ int cmd__submodule_nested_repo_config(int argc, const char **argv)
setup_git_directory();
sub = submodule_from_path(the_repository, &null_oid, argv[1]);
sub = submodule_from_path(the_repository, null_oid(), argv[1]);
if (repo_submodule_init(&subrepo, the_repository, sub)) {
die_usage(argv, "Submodule not found.");
}

4
tree-diff.c
View File

@ -161,7 +161,7 @@ static struct combine_diff_path *path_appendnew(struct combine_diff_path *last,
memcpy(p->path + base->len, path, pathlen);
p->path[len] = 0;
p->mode = mode;
oidcpy(&p->oid, oid ? oid : &null_oid);
oidcpy(&p->oid, oid ? oid : null_oid());
return p;
}
@ -243,7 +243,7 @@ static struct combine_diff_path *emit_path(struct combine_diff_path *p,
mode_i = tp[i].entry.mode;
}
else {
oid_i = &null_oid;
oid_i = null_oid();
mode_i = 0;
}

4
wt-status.c
View File

@ -1687,10 +1687,10 @@ void wt_status_get_state(struct repository *r,
if (!sequencer_get_last_command(r, &action)) {
if (action == REPLAY_PICK) {
state->cherry_pick_in_progress = 1;
oidcpy(&state->cherry_pick_head_oid, &null_oid);
oidcpy(&state->cherry_pick_head_oid, null_oid());
} else {
state->revert_in_progress = 1;
oidcpy(&state->revert_head_oid, &null_oid);
oidcpy(&state->revert_head_oid, null_oid());
}
}
if (get_detached_from)

2
xdiff-interface.c
View File

@ -172,7 +172,7 @@ void read_mmblob(mmfile_t *ptr, const struct object_id *oid)
unsigned long size;
enum object_type type;
if (oideq(oid, &null_oid)) {
if (oideq(oid, null_oid())) {
ptr->ptr = xstrdup("");
ptr->size = 0;
return;