2008-08-21 Sebastien Pouliot <sebastien@ximian.com>
[mono.git] / mcs / class / corlib / System.IO / FileSystemInfo.cs
index 168c0b8844fd0bfddbe4d107d630ab4ba61d121b..02c59c632cd468690fa9ae65ee637902e42758ee 100644 (file)
 // Copyright (C) 2001 Moonlight Enterprises, All Rights Reserved
 // 
 // Author:         Jim Richardson, develop@wtfo-guru.com
+//                 Dan Lewis (dihlewis@yahoo.co.uk)
 // Created:        Monday, August 13, 2001 
 //
 //------------------------------------------------------------------------------
 
-using System;
-
-namespace System.IO
-{
-       /// <summary>
-       /// 
-       /// </summary>
-       public abstract class FileSystemInfo : MarshalByRefObject
-       {
-               // protected stat status;
-               private bool inited;
-               
-               protected string FullPath;
-               protected string OriginalPath;
+//
+// Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+// 
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+using System.Runtime.InteropServices;
+using System.Runtime.Serialization;
+using System.Security.Permissions;
+
+namespace System.IO {
+       
+       [Serializable]
+       [FileIOPermission (SecurityAction.InheritanceDemand, Unrestricted = true)]
+#if NET_2_0
+       [ComVisible (true)]
+#endif
+#if NET_2_1
+       public abstract class FileSystemInfo {
+#else
+       public abstract class FileSystemInfo : MarshalByRefObject, ISerializable {
+
+               #region Implementation of ISerializable
 
-               protected FileSystemInfo()
+               [ComVisible(false)]
+               public virtual void GetObjectData (SerializationInfo info, StreamingContext context)
                {
-                       /*
-                       status.st_dev = 0;
-                       status.st_mode = 0;
-                       status.st_nlink = 0;
-                       status.st_uid = 0;
-                       status.st_gid = 0;
-                       status.st_size = 0;
-                       status.st_atime = 0;
-                       status.st_mtime = 0;
-                       status.st_ctime = 0;
-                       */
-
-                       FullPath = OriginalPath = String.Empty;
-               }
-
-               public FileAttributes Attributes
-               { 
-                       get
-                       {
-                               return getAttributes();
-                       }
-                       set
-                       {
-                               //TODO: Implement 
+                       info.AddValue ("OriginalPath", OriginalPath, typeof(string));
+                       info.AddValue ("FullPath", FullPath, typeof(string));
+               }
+
+               #endregion Implementation of ISerializable
+#endif
+               // public properties
+
+               public abstract bool Exists { get; }
+
+               public abstract string Name { get; }
+
+               public virtual string FullName {
+                       get {
+                               return FullPath;
                        }
                }
 
-               public DateTime CreationTime
-               {
-                       get
-                       {
-                               if(!inited)
-                               {
-                                       update();
-                               }
-                               // TODO: fix next line as far as my research has taken me so far, Unix/Linux don't
-                               //       have a creation time and according to my man the ctime if the last time
-                               //       one of the chmod flags was changed
-                               return c2csharpTime(10);//status.st_ctime);
-                       }
-                       set
-                       {
-                               //TODO: Implement
+               public string Extension {
+                       get {
+                               return Path.GetExtension (Name);
                        }
                }
 
-               public abstract bool Exists {get;}
-               public abstract string Name {get;}
-               public abstract void Delete();
+               public FileAttributes Attributes {
+                       get {
+                               Refresh (false);
+                               return stat.Attributes;
+                       }
 
-               /// <summary>
-               /// Get the extension of this item
-               /// </summary>
-               public string Extension
-               {
-                       get
-                       {
-                               return Path.GetExtension(getPathName());
+                       set {
+                               MonoIOError error;
+                               
+                               if (!MonoIO.SetFileAttributes (FullName,
+                                                              value,
+                                                              out error))
+                                       throw MonoIO.GetException (FullName,
+                                                                  error);
+                               Refresh (true);
                        }
                }
 
-               public string FullName
-               {
-                       get
-                       {
-                               return getPathName();
+               public DateTime CreationTime {
+                       get {
+                               Refresh (false);
+                               return DateTime.FromFileTime (stat.CreationTime);
+                       }
+
+                       set {
+                               long filetime = value.ToFileTime ();
+                       
+                               MonoIOError error;
+                               
+                               if (!MonoIO.SetFileTime (FullName, filetime,
+                                                        -1, -1, out error))
+                                       throw MonoIO.GetException (FullName,
+                                                                  error);
+                               Refresh (true);
                        }
                }
 
-               public DateTime LastAccessTime
-               {
-                       get
-                       {
-                               if(!inited)
-                               {
-                                       update();
-                               }
-                               return c2csharpTime(1);//status.st_atime);
+               [ComVisible(false)]
+               public DateTime CreationTimeUtc {
+                       get {
+                               return CreationTime.ToUniversalTime ();
                        }
 
-                       set
-                       {
-                               // TODO: Implement
+                       set {
+                               CreationTime = value.ToLocalTime ();
                        }
                }
 
-               public DateTime LastWriteTime
-               {       // TODO: Implement
-                       get
-                       {
-                               if(!inited)
-                               {
-                                       update();
-                               }
-                               return c2csharpTime(1);//status.st_mtime);
+               public DateTime LastAccessTime {
+                       get {
+                               Refresh (false);
+                               return DateTime.FromFileTime (stat.LastAccessTime);
                        }
-                       set
-                       {       // TODO: Implement
+
+                       set {
+                               long filetime = value.ToFileTime ();
+
+                               MonoIOError error;
+                               
+                               if (!MonoIO.SetFileTime (FullName, -1,
+                                                        filetime, -1,
+                                                        out error))
+                                       throw MonoIO.GetException (FullName,
+                                                                  error);
+                               Refresh (true);
                        }
                }
 
-               public override int GetHashCode()
-               {
-                       return getPathName().GetHashCode();
+               [ComVisible(false)]
+               public DateTime LastAccessTimeUtc {
+                       get {
+                               Refresh (false);
+                               return LastAccessTime.ToUniversalTime ();
+                       }
+
+                       set {
+                               LastAccessTime = value.ToLocalTime ();
+                       }
                }
 
-               public override bool Equals(object obj)
-               {       // TODO: Implement
-                       return false;
+               public DateTime LastWriteTime {
+                       get {
+                               Refresh (false);
+                               return DateTime.FromFileTime (stat.LastWriteTime);
+                       }
+
+                       set {
+                               long filetime = value.ToFileTime ();
+
+                               MonoIOError error;
+                               
+                               if (!MonoIO.SetFileTime (FullName, -1, -1,
+                                                        filetime, out error))
+                                       throw MonoIO.GetException (FullName,
+                                                                  error);
+                               Refresh (true);
+                       }
                }
 
-               new public static bool Equals(object obj1, object obj2)
-               {       // TODO: Implement
-                       return false;
+               [ComVisible(false)]
+               public DateTime LastWriteTimeUtc {
+                       get {
+                               Refresh (false);
+                               return LastWriteTime.ToUniversalTime ();
+                       }
+
+                       set {
+                               LastWriteTime = value.ToLocalTime ();
+                       }
                }
-                               
-               public void Refresh()
+
+               // public methods
+
+               public abstract void Delete ();
+
+               public void Refresh ()
                {
-                       update();
+                       Refresh (true);
                }
-               
 
-               unsafe private void update()
+               // protected
+
+               protected FileSystemInfo ()
                {
-                       /*
-                       stat fs;                        
-                       int nRetCode = Wrapper.stat(getPathName(), &fs);
-                       status = fs;
-                       switch(nRetCode)
-                       {
-                       case 0:
-                               break;
-                       case Wrapper.ENOENT:
-                       case Wrapper.ENOTDIR:
-                               throw new ArgumentException("File not found");  
-                               //break; generates warning CS0162 unreachable code
-                       default:
-                               throw new IOException();
-                          //break; generates warning CS0162 unreachable code
-                       }
-                       inited = true;
-                       */
-               }
-
-               private DateTime c2csharpTime(double seconds)
-               {       // TODO: determine if UTC time which the 
-                       //       calculation below is in is correct
-                  DateTime dt = new DateTime(1970, 1, 1, 0, 0, 0);
-                  dt.AddSeconds(seconds);
-                  return dt;   
+                       this.valid = false;
+                       this.FullPath = null;
                }
-               
-               protected string getPathName()
+
+               protected FileSystemInfo (SerializationInfo info, StreamingContext context)
                {
-                       if(FullPath == String.Empty)
+                       if (info == null)
                        {
-                               FullPath = Path.GetFullPath(OriginalPath);
-                       }
-                       return FullPath;
-               } 
-               
-               protected FileAttributes getAttributes()
-               {       
-                       if(!inited)
-                       {
-                               update();
+                               throw new ArgumentNullException("info");
                        }
+
+                       FullPath = info.GetString("FullPath");
+                       OriginalPath = info.GetString("OriginalPath");
+               }
+
+               protected string FullPath;
+               protected string OriginalPath;
+
+               // internal
+
+               internal void Refresh (bool force)
+               {
+                       if (valid && !force)
+                               return;
+
+                       MonoIOError error;
                        
-                       // TODO: lots more attribute work needed
-                               
-                       FileAttributes attrib = 0;
-                       /*
-                       if(((status.st_mode & Wrapper.S_IFMT) & Wrapper.S_IFDIR) != 0)
-                       {
-                               attrib |= FileAttributes.Directory;
-                       }
-                       else
-                       {
-                               attrib |= FileAttributes.Normal;
-                       }
-                       */
+                       MonoIO.GetFileStat (FullName, out stat, out error);
+                       /* Don't throw on error here, too much other
+                        * stuff relies on it not doing so...
+                        */
+                       
+                       valid = true;
+                       
+                       InternalRefresh ();
+               }
+               
+               internal virtual void InternalRefresh ()
+               {
+               }
 
-                       return attrib;
+               internal void CheckPath (string path)
+               {
+                       if (path == null)
+                               throw new ArgumentNullException ("path");
+                       if (path.Length == 0)
+                               throw new ArgumentException ("An empty file name is not valid.");
+                       if (path.IndexOfAny (Path.InvalidPathChars) != -1)
+                               throw new ArgumentException ("Illegal characters in path.");
                }
+
+               internal MonoIOStat stat;
+               internal bool valid;
        }
 }