Пример #1
0
// Get returns the value for the given key.
func (r *RocksDB) Get(key Key) ([]byte, error) {
	if len(key) == 0 {
		return nil, emptyKeyError()
	}
	var (
		cValLen C.size_t
		cErr    *C.char
	)

	cVal := C.rocksdb_get(
		r.rdb,
		r.rOpts,
		bytesPointer(key),
		C.size_t(len(key)),
		&cValLen,
		&cErr)

	if cErr != nil {
		return nil, charToErr(cErr)
	}
	if cVal == nil {
		return nil, nil
	}
	defer C.free(unsafe.Pointer(cVal))
	return C.GoBytes(unsafe.Pointer(cVal), C.int(cValLen)), nil
}
Пример #2
0
// get returns the value for the given key.
func (r *RocksDB) get(key Key) (Value, error) {
	if len(key) == 0 {
		return Value{}, emptyKeyError()
	}
	var (
		cValLen C.size_t
		cErr    *C.char
	)

	cVal := C.rocksdb_get(
		r.rdb,
		r.rOpts,
		(*C.char)(unsafe.Pointer(&key[0])),
		C.size_t(len(key)),
		&cValLen,
		&cErr)

	if cErr != nil {
		return Value{}, charToErr(cErr)
	}
	if cVal == nil {
		return Value{}, nil
	}
	defer C.free(unsafe.Pointer(cVal))
	return Value{Bytes: C.GoBytes(unsafe.Pointer(cVal), C.int(cValLen))}, nil
}
Пример #3
0
func (db *DB) Get(opt *ReadOptions, rawKey []byte) ([]byte, error) {
	var ck = (*C.char)(unsafe.Pointer(&rawKey[0]))

	var rOpt = db.rOpt
	if opt != nil && opt.rOpt != nil {
		rOpt = opt.rOpt
	}

	var errStr *C.char
	var vallen C.size_t
	var cv = C.rocksdb_get(db.db, rOpt, ck, C.size_t(len(rawKey)), &vallen, &errStr)

	var err error
	if errStr != nil {
		defer C.free(unsafe.Pointer(errStr))
		err = errors.New(C.GoString(errStr))
	}

	if cv != nil {
		defer C.free(unsafe.Pointer(cv))
		return C.GoBytes(unsafe.Pointer(cv), C.int(vallen)), err
	}

	return nil, err
}
Пример #4
0
// Get returns the data associated with the key from the database.
func (db *DB) Get(opts *ReadOptions, key []byte) (*Slice, error) {
	var cValLen C.size_t
	var cErr *C.char
	cValue := C.rocksdb_get(
		db.c, opts.c, byteToChar(key), C.size_t(len(key)), &cValLen, &cErr)
	if cErr != nil {
		return nil, convertErr(cErr)
	}
	return newSlice(cValue, cValLen), nil
}
Пример #5
0
// Get returns the data associated with the key from the database.
func (db *DB) Get(opts *ReadOptions, key []byte) (*Slice, error) {
	var (
		cErr    *C.char
		cValLen C.size_t
		cKey    = byteToChar(key)
	)
	cValue := C.rocksdb_get(db.c, opts.c, cKey, C.size_t(len(key)), &cValLen, &cErr)
	if cErr != nil {
		defer C.free(unsafe.Pointer(cErr))
		return nil, errors.New(C.GoString(cErr))
	}
	return NewSlice(cValue, cValLen), nil
}
Пример #6
0
// GetBytes is like Get but returns a copy of the data.
func (db *DB) GetBytes(opts *ReadOptions, key []byte) ([]byte, error) {
	var (
		cErr    *C.char
		cValLen C.size_t
		cKey    = byteToChar(key)
	)
	cValue := C.rocksdb_get(db.c, opts.c, cKey, C.size_t(len(key)), &cValLen, &cErr)
	if cErr != nil {
		defer C.free(unsafe.Pointer(cErr))
		return nil, errors.New(C.GoString(cErr))
	}
	if cValue == nil {
		return nil, nil
	}
	defer C.free(unsafe.Pointer(cValue))
	return C.GoBytes(unsafe.Pointer(cValue), C.int(cValLen)), nil
}
Пример #7
0
func (db *DB) getSlice(ro *ReadOptions, key []byte) (driver.ISlice, error) {
	var errStr *C.char
	var vallen C.size_t
	var k *C.char
	if len(key) != 0 {
		k = (*C.char)(unsafe.Pointer(&key[0]))
	}

	value := C.rocksdb_get(
		db.db, ro.Opt, k, C.size_t(len(key)), &vallen, &errStr)

	if errStr != nil {
		return nil, saveError(errStr)
	}

	if value == nil {
		return nil, nil
	}

	return NewCSlice(unsafe.Pointer(value), int(vallen)), nil
}
Пример #8
0
func (db *DB) get(ro *ReadOptions, key []byte) ([]byte, error) {
	var errStr *C.char
	var vallen C.size_t
	var k *C.char
	if len(key) != 0 {
		k = (*C.char)(unsafe.Pointer(&key[0]))
	}

	value := C.rocksdb_get(
		db.db, ro.Opt, k, C.size_t(len(key)), &vallen, &errStr)

	if errStr != nil {
		return nil, saveError(errStr)
	}

	if value == nil {
		return nil, nil
	}

	defer C.free(unsafe.Pointer(value))
	return C.GoBytes(unsafe.Pointer(value), C.int(vallen)), nil
}