Function OpenStack

stack.go:25–55

OpenStack opens a stack if one exists at the given directory. If one does not already exist, a new stack is created.

(dataDir string)

// OpenStack opens a stack if one exists at the given directory. If one
// does not already exist, a new stack is created.
func OpenStack(dataDir string) (*Stack, error) {
	var err error

	// Create a new Stack.
	s := &Stack{
		DataDir: dataDir,
		db:      &leveldb.DB{},
		head:    0,
		tail:    0,
		isOpen:  false,
	}

	// Open database for the stack.
	s.db, err = leveldb.OpenFile(dataDir, nil)
	if err != nil {
		return s, err
	}

	// Check if this Goque type can open the requested data directory.
	ok, err := checkGoqueType(dataDir, goqueStack)
	if err != nil {
		return s, err
	}
	if !ok {
		return s, ErrIncompatibleType
	}

	// Set isOpen and return.
	s.isOpen = true
	return s, s.init()
}

// Push adds an item to the stack.
func (s *Stack) Push(value []byte) (*Item, error) {