public INodeDirectory(VFSCore vfs, INode inode)
{
this.vfs = vfs;
this.inode = inode;
this.entries = new Dictionary<String, UInt32>();
}
/// <summary>
/// 根据 inode 建立 INodeDirectory
/// </summary>
/// <param name="vfs"></param>
/// <param name="inode"></param>
/// <returns></returns>
public static INodeDirectory Load(VFSCore vfs, INode inode)
{
INodeDirectory t = new INodeDirectory(vfs, inode);
t.Load();
return t;
}
/// <summary>
/// 添加一个文件目录项
/// </summary>
/// <param name="name"></param>
/// <param name="inodeIndex"></param>
/// <returns></returns>
public Boolean Add(String name, INode inode)
{
if (Contains(name))
{
return false;
}
entries[name] = inode.index;
inode.data.linkCount++;
inode.Save();
Save();
return true;
}
/// <summary>
/// 通过打开现有文件来初始化该类
/// </summary>
/// <param name="dir"></param>
/// <param name="name"></param>
private void OpenFile(INodeDirectory dir, String name)
{
inode = INode.Load(vfs, dir.Find(name));
}
/// <summary>
/// 通过创建一个新文件来初始化该类
/// </summary>
/// <param name="vfs"></param>
/// <param name="name"></param>
/// <param name="dir"></param>
private void CreateFile(INodeDirectory dir, String name)
{
inode = vfs.AllocateINode(0, 2333);
dir.Add(name, inode);
}
/// <summary>
/// 从存储介质中获取 inode
/// </summary>
/// <param name="vfs"></param>
/// <param name="index"></param>
/// <returns></returns>
public static INode Load(VFSCore vfs, UInt32 index)
{
if (index >= vfs.GetSuperBlock().data.inodeCapacity)
{
throw new Exception("无效 inode 编号");
}
INode inode = null;
if (inodeInstances.ContainsKey(index))
{
inode = inodeInstances[index];
return inode;
}
else
{
_INode data = vfs.GetDevice().Read<_INode>(GetPosition(vfs, index));
inode = new INode(vfs, data, index);
inodeInstances[index] = inode;
}
inode.data.accessTime = (UInt64)DateTime.Now.Ticks;
inode.Save();
return inode;
}
/// <summary>
/// 创建一个新的 inode
/// </summary>
/// <param name="vfs"></param>
/// <param name="index"></param>
/// <returns></returns>
public static INode Create(VFSCore vfs, UInt32 index, UInt32 flags, UInt32 owner)
{
if (index >= vfs.GetSuperBlock().data.inodeCapacity)
{
throw new Exception("无效 inode 编号");
}
_INode data = new _INode(flags, owner);
INode inode = new INode(vfs, data, index);
inode.Save();
inodeInstances[index] = inode;
return inode;
}