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

   1 //
   2 // Copyright (C) 2006 Novell, Inc (http://www.novell.com)
   3 //
   4 // Permission is hereby granted, free of charge, to any person obtaining
   5 // a copy of this software and associated documentation files (the
   6 // "Software"), to deal in the Software without restriction, including
   7 // without limitation the rights to use, copy, modify, merge, publish,
   8 // distribute, sublicense, and/or sell copies of the Software, and to
   9 // permit persons to whom the Software is furnished to do so, subject to
  10 // the following conditions:
  11 //
  12 // The above copyright notice and this permission notice shall be
  13 // included in all copies or substantial portions of the Software.
  14 //
  15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  19 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  20 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  21 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22 //
  23
  24 using System;
  25 using System.Collections.Generic;
  26 using System.Text;
  27 using System.Runtime.Serialization;
  28 using System.Runtime.CompilerServices;
  29 using System.Runtime.InteropServices;
  30
  31 namespace System.IO {
  32         [SerializableAttribute]
  33         [ComVisibleAttribute(true)]
  34         public sealed class DriveInfo : ISerializable {
  35                 string drive_format;
  36                 string path;
  37
  38                 DriveInfo (string path, string fstype)
  39                 {
  40                         this.drive_format = fstype;
  41                         this.path = path;
  42                 }
  43
  44                 public DriveInfo (string driveName)
  45                 {
  46                         if (!Environment.IsUnix) {
  47                                 if (driveName == null || driveName.Length == 0)
  48                                         throw new ArgumentException ("The drive name is null or empty", "driveName");
  49
  50                                 if (driveName.Length >= 2 && driveName [1] != ':')
  51                                         throw new ArgumentException ("Invalid drive name", "driveName");
  52
  53                                 // Convert the path to a standard format so we can find it later.
  54                                 driveName = String.Concat (Char.ToUpper (driveName [0]).ToString (), ":\\");
  55                         }
  56
  57                         DriveInfo [] drives = GetDrives ();
  58                         foreach (DriveInfo d in drives){
  59                                 if (d.path == driveName){
  60                                         this.path = d.path;
  61                                         this.drive_format = d.drive_format;
  62                                         this.path = d.path;
  63                                         return;
  64                                 }
  65                         }
  66                         throw new ArgumentException ("The drive name does not exist", "driveName");
  67                 }
  68
  69                 static void GetDiskFreeSpace (string path, out ulong availableFreeSpace, out ulong totalSize, out ulong totalFreeSpace)
  70                 {
  71                         MonoIOError error;
  72                         if (!GetDiskFreeSpaceInternal (path, out availableFreeSpace, out totalSize, out totalFreeSpace, out error))
  73                                 throw MonoIO.GetException (path, error);
  74                 }
  75
  76                 public long AvailableFreeSpace {
  77                         get {
  78                                 ulong availableFreeSpace;
  79                                 ulong totalSize;
  80                                 ulong totalFreeSpace;
  81
  82                                 GetDiskFreeSpace (path, out availableFreeSpace, out totalSize, out totalFreeSpace);
  83                                 return availableFreeSpace > long.MaxValue ?  long.MaxValue : (long) availableFreeSpace;
  84                         }
  85                 }
  86
  87                 public long TotalFreeSpace {
  88                         get {
  89                                 ulong availableFreeSpace;
  90                                 ulong totalSize;
  91                                 ulong totalFreeSpace;
  92
  93                                 GetDiskFreeSpace (path, out availableFreeSpace, out totalSize, out totalFreeSpace);
  94                                 return totalFreeSpace > long.MaxValue ?  long.MaxValue : (long) totalFreeSpace;
  95                         }
  96                 }
  97
  98                 public long TotalSize {
  99                         get {
 100                                 ulong availableFreeSpace;
 101                                 ulong totalSize;
 102                                 ulong totalFreeSpace;
 103
 104                                 GetDiskFreeSpace (path, out availableFreeSpace, out totalSize, out totalFreeSpace);
 105                                 return totalSize > long.MaxValue ?  long.MaxValue : (long) totalSize;
 106                         }
 107                 }
 108
 109                 [MonoTODO ("Currently get only works on Mono/Unix; set not implemented")]
 110                 public string VolumeLabel {
 111                         get {
 112                                 return path;
 113                         }
 114                         set {
 115                                 throw new NotImplementedException ();
 116                         }
 117                 }
 118
 119                 public string DriveFormat {
 120                         get {
 121                                 return drive_format;
 122                         }
 123                 }
 124
 125                 public DriveType DriveType {
 126                         get {
 127                                 return (DriveType) GetDriveTypeInternal (path);
 128                         }
 129                 }
 130
 131                 public string Name {
 132                         get {
 133                                 return path;
 134                         }
 135                 }
 136
 137                 public DirectoryInfo RootDirectory {
 138                         get {
 139                                 return new DirectoryInfo (path);
 140                         }
 141                 }
 142
 143                 [MonoTODO("It always returns true")]
 144                 public bool IsReady {
 145                         get {
 146                                 return true;
 147                         }
 148                 }
 149
 150                 [MonoTODO("In windows, alldrives are 'Fixed'")]
 151                 public static DriveInfo[] GetDrives ()
 152                 {
 153                         var drives = Environment.GetLogicalDrives ();
 154                         DriveInfo [] infos = new DriveInfo [drives.Length];
 155                         int i = 0;
 156                         foreach (string s in drives)
 157                                 infos [i++] = new DriveInfo (s, GetDriveFormat (s));
 158
 159                         return infos;
 160                 }
 161
 162                 void ISerializable.GetObjectData (System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context)
 163                 {
 164                         throw new NotImplementedException ();
 165                 }
 166
 167                 public override string ToString ()
 168                 {
 169                         return(Name);
 170                 }
 171
 172                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 173                 extern static bool GetDiskFreeSpaceInternal (string pathName, out ulong freeBytesAvail,
 174                                                              out ulong totalNumberOfBytes, out ulong totalNumberOfFreeBytes,
 175                                                              out MonoIOError error);
 176
 177                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 178                 extern static uint GetDriveTypeInternal (string rootPathName);
 179
 180                 [MethodImplAttribute (MethodImplOptions.InternalCall)]
 181                 extern static string GetDriveFormat (string rootPathName);
 182         }
 183 }