thodg/libgit2/src/refdb.c

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• Hash : 0c7f49dd
  Author :
  Date : 2017-06-30T13:39:01
  

  Make sure to always include "common.h" first Next to including several files, our "common.h" header also declares various macros which are then used throughout the project. As such, we have to make sure to always include this file first in all implementation files. Otherwise, we might encounter problems or even silent behavioural differences due to macros or defines not being defined as they should be. So in fact, our header and implementation files should make sure to always include "common.h" first. This commit does so by establishing a common include pattern. Header files inside of "src" will now always include "common.h" as its first other file, separated by a newline from all the other includes to make it stand out as special. There are two cases for the implementation files. If they do have a matching header file, they will always include this one first, leading to "common.h" being transitively included as first file. If they do not have a matching header file, they instead include "common.h" as first file themselves. This fixes the outlined problems and will become our standard practice for header and source files inside of the "src/" from now on.

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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 "refdb.h"
  
  #include "git2/object.h"
  #include "git2/refs.h"
  #include "git2/refdb.h"
  #include "git2/sys/refdb_backend.h"
  
  #include "hash.h"
  #include "refs.h"
  #include "reflog.h"
  #include "posix.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)
  		db->backend->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)
  {
  	int error;
  
  	if (!db->backend || !db->backend->iterator) {
  		giterr_set(GITERR_REFERENCE, "this backend doesn't support iterators");
  		return -1;
  	}
  
  	if ((error = db->backend->iterator(out, db->backend, glob)) < 0)
  		return error;
  
  	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);
  }
  
  int git_refdb_init_backend(git_refdb_backend *backend, unsigned int version)
  {
  	GIT_INIT_STRUCTURE_FROM_TEMPLATE(
  		backend, version, git_refdb_backend, GIT_REFDB_BACKEND_INIT);
  	return 0;
  }
  
  int git_refdb_lock(void **payload, git_refdb *db, const char *refname)
  {
  	assert(payload && db && refname);
  
  	if (!db->backend->lock) {
  		giterr_set(GITERR_REFERENCE, "backend does not support locking");
  		return -1;
  	}
  
  	return db->backend->lock(payload, db->backend, refname);
  }
  
  int git_refdb_unlock(git_refdb *db, void *payload, int success, int update_reflog, const git_reference *ref, const git_signature *sig, const char *message)
  {
  	assert(db);
  
  	return db->backend->unlock(db->backend, payload, success, update_reflog, ref, sig, message);
  }
  

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