[PATCH v2 04/38] refs: add a backend method structure
- From
Michael Haggerty <mhagger@alum.mit.edu>
- Date
- Sep 4, 2016, 16:08 UTC
- Message-ID
- <4da46c8dfa4b7ec13927ca8597b64ffff7de4430.1473003902.git.mhagger@alum.mit.edu>
- In-Reply-To
- <cover.1473003902.git.mhagger@alum.mit.edu>
From: Ronnie Sahlberg <sahlberg@google.com>
Add a `struct ref_storage_be` to represent types of reference stores. In OO notation, this is the class, and will soon hold some class methods (e.g., a factory to create new ref_store instances) and will also serve as the vtable for ref_store instances of that type.
As yet, the backends cannot do anything.
Signed-off-by: Ronnie Sahlberg <sahlberg@google.com> Signed-off-by: David Turner <dturner@twopensource.com> Signed-off-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com> --- refs.c | 19 +++++++++++++++++++ refs.h | 2 ++ refs/files-backend.c | 5 +++++ refs/refs-internal.h | 8 ++++++++ 4 files changed, 34 insertions(+)
diff --git a/refs.c b/refs.c index 4c609df..d2a29bb 100644 --- a/refs.c +++ b/refs.c @@ -10,6 +10,25 @@ #include "tag.h" /* + * List of all available backends + */ +static struct ref_storage_be *refs_backends = &refs_be_files; + +static struct ref_storage_be *find_ref_storage_backend(const char *name) +{ + struct ref_storage_be *be; + for (be = refs_backends; be; be = be->next) + if (!strcmp(be->name, name)) + return be; + return NULL; +} + +int ref_storage_backend_exists(const char *name) +{ + return find_ref_storage_backend(name) != NULL; +} + +/* * How to handle various characters in refnames: * 0: An acceptable character for refs * 1: End-of-component diff --git a/refs.h b/refs.h index 1b02043..9a29f1b 100644 --- a/refs.h +++ b/refs.h @@ -544,4 +544,6 @@ int reflog_expire(const char *refname, const unsigned char *sha1, reflog_expiry_cleanup_fn cleanup_fn, void *policy_cb_data); +int ref_storage_backend_exists(const char *name); + #endif /* REFS_H */ diff --git a/refs/files-backend.c b/refs/files-backend.c index aa09586..ecf66e6 100644 --- a/refs/files-backend.c +++ b/refs/files-backend.c @@ -4076,3 +4076,8 @@ int reflog_expire(const char *refname, const unsigned char *sha1, unlock_ref(lock); return -1; } + +struct ref_storage_be refs_be_files = { + NULL, + "files" +}; diff --git a/refs/refs-internal.h b/refs/refs-internal.h index 0206e2b..2c9d134 100644 --- a/refs/refs-internal.h +++ b/refs/refs-internal.h @@ -525,4 +525,12 @@ int do_for_each_ref_iterator(struct ref_iterator *iter, int read_raw_ref(const char *refname, unsigned char *sha1, struct strbuf *referent, unsigned int *type); +/* refs backends */ +struct ref_storage_be { + struct ref_storage_be *next; + const char *name; +}; + +extern struct ref_storage_be refs_be_files; + #endif /* REFS_REFS_INTERNAL_H */
-- 2.9.3