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files_ref_store::submodule: use NULL for the main repository

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The old practice of storing the empty string in this member for the main
repository was a holdover from before 00eebe3 (refs: create a base class
"ref_store" for files_ref_store, 2016-09-04), when the submodule was
stored in a flex array at the end of `struct files_ref_store`. Storing
NULL for this case is more idiomatic and a tiny bit less code.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Reviewed-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Michael Haggerty 2017-02-10 12:16:18 +01:00 committed by Junio C Hamano
parent fbfd0a2915
commit 9c7d772b6b
1 changed files with 8 additions and 8 deletions
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16
refs/files-backend.c
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@ -915,8 +915,8 @@ struct files_ref_store {
/*
* The name of the submodule represented by this object, or
* the empty string if it represents the main repository's
* reference store:
* NULL if it represents the main repository's reference
* store:
*/
const char *submodule;
@ -982,7 +982,7 @@ static struct ref_store *files_ref_store_create(const char *submodule)
base_ref_store_init(ref_store, &refs_be_files);
refs->submodule = submodule ? xstrdup(submodule) : "";
refs->submodule = xstrdup_or_null(submodule);
return ref_store;
}
@ -994,7 +994,7 @@ static struct ref_store *files_ref_store_create(const char *submodule)
static void files_assert_main_repository(struct files_ref_store *refs,
const char *caller)
{
if (*refs->submodule)
if (refs->submodule)
die("BUG: %s called for a submodule", caller);
}
@ -1158,7 +1158,7 @@ static struct packed_ref_cache *get_packed_ref_cache(struct files_ref_store *ref
{
char *packed_refs_file;
if (*refs->submodule)
if (refs->submodule)
packed_refs_file = git_pathdup_submodule(refs->submodule,
"packed-refs");
else
@ -1228,7 +1228,7 @@ static void read_loose_refs(const char *dirname, struct ref_dir *dir)
size_t path_baselen;
int err = 0;
if (*refs->submodule)
if (refs->submodule)
err = strbuf_git_path_submodule(&path, refs->submodule, "%s", dirname);
else
strbuf_git_path(&path, "%s", dirname);
@ -1269,7 +1269,7 @@ static void read_loose_refs(const char *dirname, struct ref_dir *dir)
} else {
int read_ok;
if (*refs->submodule) {
if (refs->submodule) {
hashclr(sha1);
flag = 0;
read_ok = !resolve_gitlink_ref(refs->submodule,
@ -1383,7 +1383,7 @@ static int files_read_raw_ref(struct ref_store *ref_store,
*type = 0;
strbuf_reset(&sb_path);
if (*refs->submodule)
if (refs->submodule)
strbuf_git_path_submodule(&sb_path, refs->submodule, "%s", refname);
else
strbuf_git_path(&sb_path, "%s", refname);