func (option *Options) Set_create_if_missing(flag bool) { if flag { C.leveldb_options_set_create_if_missing(option.options, C.uchar(1)) } else { C.leveldb_options_set_create_if_missing(option.options, C.uchar(0)) } }
func Open(path string) (*LevelDB, error) { var err *C.char db := &LevelDB{} db.dbOpts = &DBOptions{C.leveldb_options_create()} db.readOpts = &ReadOptions{C.leveldb_readoptions_create()} db.writeOpts = &WriteOptions{C.leveldb_writeoptions_create()} C.leveldb_options_set_create_if_missing(db.dbOpts.Opts, 1) db.db = C.leveldb_open(db.dbOpts.Opts, C.CString(path), &err) if db.db == nil { e := &DBError{} e.Err = "Open db failed" return nil, e } if err != nil { e := &DBError{} e.Err = C.GoString(err) return db, e } return db, nil }
func OpenLeveldb(dir string) (*Leveldb, error) { options := C.leveldb_options_create() C.leveldb_options_set_create_if_missing(options, C.uchar(1)) cache := C.leveldb_cache_create_lru(levelCacheCap) C.leveldb_options_set_cache(options, cache) cDir := C.CString(dir) defer C.free(unsafe.Pointer(cDir)) var err *C.char db := C.leveldb_open(options, cDir, &err) if err != nil { return nil, errors.New(fmt.Sprintf("%s: %s", err, dir)) } C.leveldb_free(unsafe.Pointer(err)) err = nil leveldb := &Leveldb{ cdb: db, read_options: C.leveldb_readoptions_create(), write_options: C.leveldb_writeoptions_create(), cache: cache, } return leveldb, nil }
// Open LevelDB with given name func OpenLevelDB(path string) (leveldb *LevelDB, err error) { cpath := C.CString(path) // convert path to c string defer C.leveldb_free(unsafe.Pointer(cpath)) // allocate LevelDB Option struct to open opt := C.leveldb_options_create() defer C.leveldb_free(unsafe.Pointer(opt)) // set open option C.leveldb_options_set_create_if_missing(opt, C.uchar(1)) // open leveldb var cerr *C.char cleveldb := C.leveldb_open(opt, cpath, &cerr) if cerr != nil { defer C.leveldb_free(unsafe.Pointer(cerr)) return nil, errors.New(C.GoString(cerr)) } return &LevelDB{cleveldb, path}, nil }
// SetCreateIfMissing causes Open to create a new database on disk if it does // not already exist. func (o *Options) SetCreateIfMissing(b bool) { C.leveldb_options_set_create_if_missing(o.Opt, boolToUchar(b)) }