thodg/libgit2/src/refdb.c

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• Hash : 7ee8c7e6
  Author :
  Date : 2014-02-05T11:07:34
  

  refs: placeholder conditional delete We don't actually pass the old value yet.

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• src/refdb.c

• /*
   * Copyright (C) the libgit2 contributors. All rights reserved.
   *
   * This file is part of libgit2, distributed under the GNU GPL v2 with
   * a Linking Exception. For full terms see the included COPYING file.
   */
  
  #include "common.h"
  #include "posix.h"
  
  #include "git2/object.h"
  #include "git2/refs.h"
  #include "git2/refdb.h"
  #include "git2/sys/refdb_backend.h"
  
  #include "hash.h"
  #include "refdb.h"
  #include "refs.h"
  #include "reflog.h"
  
  int git_refdb_new(git_refdb **out, git_repository *repo)
  {
  	git_refdb *db;
  
  	assert(out && repo);
  
  	db = git__calloc(1, sizeof(*db));
  	GITERR_CHECK_ALLOC(db);
  
  	db->repo = repo;
  
  	*out = db;
  	GIT_REFCOUNT_INC(db);
  	return 0;
  }
  
  int git_refdb_open(git_refdb **out, git_repository *repo)
  {
  	git_refdb *db;
  	git_refdb_backend *dir;
  
  	assert(out && repo);
  
  	*out = NULL;
  
  	if (git_refdb_new(&db, repo) < 0)
  		return -1;
  
  	/* Add the default (filesystem) backend */
  	if (git_refdb_backend_fs(&dir, repo) < 0) {
  		git_refdb_free(db);
  		return -1;
  	}
  
  	db->repo = repo;
  	db->backend = dir;
  
  	*out = db;
  	return 0;
  }
  
  static void refdb_free_backend(git_refdb *db)
  {
  	if (db->backend) {
  		if (db->backend->free)
  			db->backend->free(db->backend);
  		else
  			git__free(db->backend);
  	}
  }
  
  int git_refdb_set_backend(git_refdb *db, git_refdb_backend *backend)
  {
  	refdb_free_backend(db);
  	db->backend = backend;
  
  	return 0;
  }
  
  int git_refdb_compress(git_refdb *db)
  {
  	assert(db);
  
  	if (db->backend->compress)
  		return db->backend->compress(db->backend);
  
  	return 0;
  }
  
  void git_refdb__free(git_refdb *db)
  {
  	refdb_free_backend(db);
  	git__memzero(db, sizeof(*db));
  	git__free(db);
  }
  
  void git_refdb_free(git_refdb *db)
  {
  	if (db == NULL)
  		return;
  
  	GIT_REFCOUNT_DEC(db, git_refdb__free);
  }
  
  int git_refdb_exists(int *exists, git_refdb *refdb, const char *ref_name)
  {
  	assert(exists && refdb && refdb->backend);
  
  	return refdb->backend->exists(exists, refdb->backend, ref_name);
  }
  
  int git_refdb_lookup(git_reference **out, git_refdb *db, const char *ref_name)
  {
  	git_reference *ref;
  	int error;
  
  	assert(db && db->backend && out && ref_name);
  
  	error = db->backend->lookup(&ref, db->backend, ref_name);
  	if (error < 0)
  		return error;
  
  	GIT_REFCOUNT_INC(db);
  	ref->db = db;
  
  	*out = ref;
  	return 0;
  }
  
  int git_refdb_iterator(git_reference_iterator **out, git_refdb *db, const char *glob)
  {
  	if (!db->backend || !db->backend->iterator) {
  		giterr_set(GITERR_REFERENCE, "This backend doesn't support iterators");
  		return -1;
  	}
  
  	if (db->backend->iterator(out, db->backend, glob) < 0)
  		return -1;
  
  	GIT_REFCOUNT_INC(db);
  	(*out)->db = db;
  
  	return 0;
  }
  
  int git_refdb_iterator_next(git_reference **out, git_reference_iterator *iter)
  {
  	int error;
  
  	if ((error = iter->next(out, iter)) < 0)
  		return error;
  
  	GIT_REFCOUNT_INC(iter->db);
  	(*out)->db = iter->db;
  
  	return 0;
  }
  
  int git_refdb_iterator_next_name(const char **out, git_reference_iterator *iter)
  {
  	return iter->next_name(out, iter);
  }
  
  void git_refdb_iterator_free(git_reference_iterator *iter)
  {
  	GIT_REFCOUNT_DEC(iter->db, git_refdb__free);
  	iter->free(iter);
  }
  
  int git_refdb_write(git_refdb *db, git_reference *ref, int force, const git_signature *who, const char *message, const git_oid *old_id, const char *old_target)
  {
  	assert(db && db->backend);
  
  	GIT_REFCOUNT_INC(db);
  	ref->db = db;
  
  	return db->backend->write(db->backend, ref, force, who, message, old_id, old_target);
  }
  
  int git_refdb_rename(
  	git_reference **out,
  	git_refdb *db,
  	const char *old_name,
  	const char *new_name,
  	int force,
  	const git_signature *who,
  	const char *message)
  {
  	int error;
  
  	assert(db && db->backend);
  	error = db->backend->rename(out, db->backend, old_name, new_name, force, who, message);
  	if (error < 0)
  		return error;
  
  	if (out) {
  		GIT_REFCOUNT_INC(db);
  		(*out)->db = db;
  	}
  
  	return 0;
  }
  
  int git_refdb_delete(struct git_refdb *db, const char *ref_name, const git_oid *old_id, const char *old_target)
  {
  	assert(db && db->backend);
  	return db->backend->del(db->backend, ref_name, old_id, old_target);
  }
  
  int git_refdb_reflog_read(git_reflog **out, git_refdb *db,  const char *name)
  {
  	int error;
  
  	assert(db && db->backend);
  
  	if ((error = db->backend->reflog_read(out, db->backend, name)) < 0)
  		return error;
  
  	GIT_REFCOUNT_INC(db);
  	(*out)->db = db;
  
  	return 0;
  }
  
  int git_refdb_has_log(git_refdb *db, const char *refname)
  {
  	assert(db && refname);
  
  	return db->backend->has_log(db->backend, refname);
  }
  
  int git_refdb_ensure_log(git_refdb *db, const char *refname)
  {
  	assert(db && refname);
  
  	return db->backend->ensure_log(db->backend, refname);
  }
  

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