text: // Copyright © 2014 Steve Francia <spf@spf13.com>.
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  // http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  package mem
  
  type Dir interface {
  	Len() int
  	Names() []string
  	Files() []*FileData
  	Add(*FileData)
  	Remove(*FileData)
  }
  
  func RemoveFromMemDir(dir *FileData, f *FileData) {
  	dir.memDir.Remove(f)
  }
  
  func AddToMemDir(dir *FileData, f *FileData) {
  	dir.memDir.Add(f)
  }
  
  func InitializeDir(d *FileData) {
  	if d.memDir == nil {
  		d.dir = true
  		d.memDir = &DirMap{}
  	}
  }
  