You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: manual.go
    path of file: ./repos/tidb/br/pkg/lightning/manual
    
    the code of the file until where you have to start completion: // Copyright 2020 The LevelDB-Go and P
    
func New(n int) []byte {
	if n == 0 {
		return make([]byte, 0)
	}
	// We need to be conscious of the Cgo pointer passing rules:
	//
	//   https://golang.org/cmd/cgo/#hdr-Passing_pointers
	//
	//   ...
	//   Note: the current implementation has a bug. While Go code is permitted
	//   to write nil or a C pointer (but not a Go pointer) to C memory, the
	//   current implementation may sometimes cause a runtime error if the
	//   contents of the C memory appear to be a Go pointer. Therefore, avoid
	//   passing uninitialized C memory to Go code if the Go code is going to
	//   store pointer values in it. Zero out the memory in C before passing it
	//   to Go.
	ptr := C.calloc(C.size_t(n), 1)
	if ptr == nil {
		// NB: throw is like panic, except it guarantees the process will be
		// terminated. The call below is exactly what the Go runtime invokes when
		// it cannot allocate memory.
		throw("out of memory")
	}
	// Interpret the C pointer as a pointer to a Go array, then slice.
	return (*[MaxArrayLen]byte)(ptr)[:n:n]
}