mcs/class/corlib/System.IO/DirectoryInfo.cs

   1 //
   2 // System.IO.DirectoryInfo.cs
   3 //
   4 // Authors:
   5 //   Miguel de Icaza, miguel@ximian.com
   6 //   Jim Richardson, develop@wtfo-guru.com
   7 //   Dan Lewis, dihlewis@yahoo.co.uk
   8 //   Sebastien Pouliot  <sebastien@ximian.com>
   9 //
  10 // Copyright (C) 2002 Ximian, Inc.
  11 // Copyright (C) 2001 Moonlight Enterprises, All Rights Reserved
  12 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
  13 //
  14 // Permission is hereby granted, free of charge, to any person obtaining
  15 // a copy of this software and associated documentation files (the
  16 // "Software"), to deal in the Software without restriction, including
  17 // without limitation the rights to use, copy, modify, merge, publish,
  18 // distribute, sublicense, and/or sell copies of the Software, and to
  19 // permit persons to whom the Software is furnished to do so, subject to
  20 // the following conditions:
  21 //
  22 // The above copyright notice and this permission notice shall be
  23 // included in all copies or substantial portions of the Software.
  24 //
  25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  32 //
  33
  34 using System.Collections;
  35 using System.Runtime.InteropServices;
  36 using System.Runtime.Serialization;
  37 using System.Text;
  38 #if !NET_2_1
  39 using System.Security.AccessControl;
  40 #endif
  41
  42 namespace System.IO {
  43
  44         [Serializable]
  45         [ComVisible (true)]
  46         public sealed class DirectoryInfo : FileSystemInfo {
  47
  48                 private string current;
  49                 private string parent;
  50
  51                 public DirectoryInfo (string path) : this (path, false)
  52                 {
  53                 }
  54
  55                 internal DirectoryInfo (string path, bool simpleOriginalPath)
  56                 {
  57                         CheckPath (path);
  58
  59                         FullPath = Path.GetFullPath (path);
  60                         if (simpleOriginalPath)
  61                                 OriginalPath = Path.GetFileName (path);
  62                         else
  63                                 OriginalPath = path;
  64
  65                         Initialize ();
  66                 }
  67
  68                 private DirectoryInfo (SerializationInfo info, StreamingContext context)
  69                         : base (info, context)
  70                 {
  71                         Initialize ();
  72                 }
  73
  74                 void Initialize ()
  75                 {
  76                         int len = FullPath.Length - 1;
  77                         if ((len > 1) && (FullPath [len] == Path.DirectorySeparatorChar))
  78                                 len--;
  79                         int last = FullPath.LastIndexOf (Path.DirectorySeparatorChar, len);
  80                         if ((last == -1) || ((last == 0) && (len == 0))) {
  81                                 current = FullPath;
  82                                 parent = null;
  83                         } else {
  84                                 current = FullPath.Substring (last + 1, len - last);
  85                                 if (last == 0 && !Environment.IsRunningOnWindows)
  86                                         parent = Path.DirectorySeparatorStr;
  87                                 else
  88                                         parent = FullPath.Substring (0, last);
  89                                 // adjust for drives, i.e. a special case for windows
  90                                 if (Environment.IsRunningOnWindows) {
  91                                         if ((parent.Length == 2) && (parent [1] == ':') && Char.IsLetter (parent [0]))
  92                                                 parent += Path.DirectorySeparatorChar;
  93                                 }
  94                         }
  95                 }
  96
  97                 // properties
  98
  99                 public override bool Exists {
 100                         get {
 101                                 Refresh (false);
 102
 103                                 if (stat.Attributes == MonoIO.InvalidFileAttributes)
 104                                         return false;
 105
 106                                 if ((stat.Attributes & FileAttributes.Directory) == 0)
 107                                         return false;
 108
 109                                 return true;
 110                         }
 111                 }
 112
 113                 public override string Name {
 114                         get { return current; }
 115                 }
 116
 117                 public DirectoryInfo Parent {
 118                         get {
 119                                 if ((parent == null) || (parent.Length == 0))
 120                                         return null;
 121                                 return new DirectoryInfo (parent);
 122                         }
 123                 }
 124
 125                 public DirectoryInfo Root {
 126                         get {
 127                                 string root = Path.GetPathRoot (FullPath);
 128                                 if (root == null)
 129                                         return null;
 130
 131                                 return new DirectoryInfo (root);
 132                         }
 133                 }
 134
 135                 // creational methods
 136
 137                 public void Create ()
 138                 {
 139                         Directory.CreateDirectory (FullPath);
 140                 }
 141
 142                 public DirectoryInfo CreateSubdirectory (string path)
 143                 {
 144                         CheckPath (path);
 145
 146                         path = Path.Combine (FullPath, path);
 147                         Directory.CreateDirectory (path);
 148                         return new DirectoryInfo (path);
 149                 }
 150
 151                 // directory listing methods
 152
 153                 public FileInfo [] GetFiles ()
 154                 {
 155                         return GetFiles ("*");
 156                 }
 157
 158                 public FileInfo [] GetFiles (string searchPattern)
 159                 {
 160                         if (searchPattern == null)
 161                                 throw new ArgumentNullException ("searchPattern");
 162
 163                         string [] names = Directory.GetFiles (FullPath, searchPattern);
 164
 165                         FileInfo[] infos = new FileInfo [names.Length];
 166                         int i = 0;
 167                         foreach (string name in names)
 168                                 infos [i++] = new FileInfo (name);
 169
 170                         return infos;
 171                 }
 172
 173                 public DirectoryInfo [] GetDirectories ()
 174                 {
 175                         return GetDirectories ("*");
 176                 }
 177
 178                 public DirectoryInfo [] GetDirectories (string searchPattern)
 179                 {
 180                         if (searchPattern == null)
 181                                 throw new ArgumentNullException ("searchPattern");
 182
 183                         string [] names = Directory.GetDirectories (FullPath, searchPattern);
 184
 185                         DirectoryInfo[] infos = new DirectoryInfo [names.Length];
 186                         int i = 0;
 187                         foreach (string name in names)
 188                                 infos [i++] = new DirectoryInfo (name);
 189
 190                         return infos;
 191                 }
 192
 193                 public FileSystemInfo [] GetFileSystemInfos ()
 194                 {
 195                         return GetFileSystemInfos ("*");
 196                 }
 197
 198                 public FileSystemInfo [] GetFileSystemInfos (string searchPattern)
 199                 {
 200                         if (searchPattern == null)
 201                                 throw new ArgumentNullException ("searchPattern");
 202
 203                         if (!Directory.Exists (FullPath))
 204                                 throw new IOException ("Invalid directory");
 205                         string [] dirs = Directory.GetDirectories (FullPath, searchPattern);
 206                         string [] files = Directory.GetFiles (FullPath, searchPattern);
 207
 208                         FileSystemInfo[] infos = new FileSystemInfo [dirs.Length + files.Length];
 209                         int i = 0;
 210                         foreach (string dir in dirs)
 211                                 infos [i++] = new DirectoryInfo (dir);
 212                         foreach (string file in files)
 213                                 infos [i++] = new FileInfo (file);
 214
 215                         return infos;
 216                 }
 217
 218                 // directory management methods
 219
 220                 public override void Delete ()
 221                 {
 222                         Delete (false);
 223                 }
 224
 225                 public void Delete (bool recursive)
 226                 {
 227                         Directory.Delete (FullPath, recursive);
 228                 }
 229
 230                 public void MoveTo (string destDirName)
 231                 {
 232                         if (destDirName == null)
 233                                 throw new ArgumentNullException ("destDirName");
 234                         if (destDirName.Length == 0)
 235                                 throw new ArgumentException ("An empty file name is not valid.", "destDirName");
 236
 237                         Directory.Move (FullPath, Path.GetFullPath (destDirName));
 238                 }
 239
 240                 public override string ToString ()
 241                 {
 242                         return OriginalPath;
 243                 }
 244
 245 #if !NET_2_1
 246                 public DirectoryInfo[] GetDirectories (string searchPattern, SearchOption searchOption)
 247                 {
 248                         switch (searchOption) {
 249                         case SearchOption.TopDirectoryOnly:
 250                                 return GetDirectories (searchPattern);
 251                         case SearchOption.AllDirectories:
 252                                 Queue workq = new Queue(GetDirectories(searchPattern));
 253                                 Queue doneq = new Queue();
 254                                 while (workq.Count > 0)
 255                                         {
 256                                                 DirectoryInfo cinfo = (DirectoryInfo) workq.Dequeue();
 257                                                 DirectoryInfo[] cinfoDirs = cinfo.GetDirectories(searchPattern);
 258                                                 foreach (DirectoryInfo i in cinfoDirs) workq.Enqueue(i);
 259                                                 doneq.Enqueue(cinfo);
 260                                         }
 261
 262                                 DirectoryInfo[] infos = new DirectoryInfo[doneq.Count];
 263                                 doneq.CopyTo(infos, 0);
 264                                 return infos;
 265                         default:
 266                                 string msg = Locale.GetText ("Invalid enum value '{0}' for '{1}'.", searchOption, "SearchOption");
 267                                 throw new ArgumentOutOfRangeException ("searchOption", msg);
 268                         }
 269                 }
 270
 271                 internal int GetFilesSubdirs (ArrayList l, string pattern)
 272                 {
 273                         int count;
 274                         FileInfo [] thisdir = null;
 275
 276                         try {
 277                                 thisdir = GetFiles (pattern);
 278                         } catch (System.UnauthorizedAccessException){
 279                                 return 0;
 280                         }
 281
 282                         count = thisdir.Length;
 283                         l.Add (thisdir);
 284
 285                         foreach (DirectoryInfo subdir in GetDirectories ()){
 286                                 count += subdir.GetFilesSubdirs (l, pattern);
 287                         }
 288                         return count;
 289                 }
 290
 291                 public FileInfo[] GetFiles (string searchPattern, SearchOption searchOption)
 292                 {
 293                         switch (searchOption) {
 294                         case SearchOption.TopDirectoryOnly:
 295                                 return GetFiles (searchPattern);
 296                         case SearchOption.AllDirectories: {
 297                                 ArrayList groups = new ArrayList ();
 298                                 int count = GetFilesSubdirs (groups, searchPattern);
 299                                 int current = 0;
 300
 301                                 FileInfo [] all = new FileInfo [count];
 302                                 foreach (FileInfo [] p in groups){
 303                                         p.CopyTo (all, current);
 304                                         current += p.Length;
 305                                 }
 306                                 return all;
 307                         }
 308                         default:
 309                                 string msg = Locale.GetText ("Invalid enum value '{0}' for '{1}'.", searchOption, "SearchOption");
 310                                 throw new ArgumentOutOfRangeException ("searchOption", msg);
 311                         }
 312                 }
 313
 314                 // access control methods
 315
 316                 [MonoLimitation ("DirectorySecurity isn't implemented")]
 317                 public void Create (DirectorySecurity directorySecurity)
 318                 {
 319                         if (directorySecurity != null)
 320                                 throw new UnauthorizedAccessException ();
 321                         Create ();
 322                 }
 323
 324                 [MonoLimitation ("DirectorySecurity isn't implemented")]
 325                 public DirectoryInfo CreateSubdirectory (string path, DirectorySecurity directorySecurity)
 326                 {
 327                         if (directorySecurity != null)
 328                                 throw new UnauthorizedAccessException ();
 329                         return CreateSubdirectory (path);
 330                 }
 331
 332                 [MonoNotSupported ("DirectorySecurity isn't implemented")]
 333                 public DirectorySecurity GetAccessControl ()
 334                 {
 335                         throw new UnauthorizedAccessException ();
 336                 }
 337
 338                 [MonoNotSupported ("DirectorySecurity isn't implemented")]
 339                 public DirectorySecurity GetAccessControl (AccessControlSections includeSections)
 340                 {
 341                         throw new UnauthorizedAccessException ();
 342                 }
 343
 344                 [MonoLimitation ("DirectorySecurity isn't implemented")]
 345                 public void SetAccessControl (DirectorySecurity directorySecurity)
 346                 {
 347                         if (directorySecurity != null)
 348                                 throw new ArgumentNullException ("directorySecurity");
 349                         throw new UnauthorizedAccessException ();
 350                 }
 351 #endif
 352         }
 353 }