class/System/System.Collections.Specialized/ProcessStringDictionary.cs

   1 //
   2 // System.Collections.Specialized.ProcessStringDictionary.cs
   3 //
   4 // Authors:
   5 //      Gonzalo Paniagua Javier (gonzalo@ximin.com)
   6 //
   7 // (c) 2004 Novell, Inc. (http://www.novell.com)
   8 //
   9
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 // StringDictionary turns all the keys into lower case. That's not good
  32 // when ProcessStartInfo.EnvironmentVariables is used on *nix.
  33
  34 using System.Collections;
  35
  36 namespace System.Collections.Specialized
  37 {
  38         class ProcessStringDictionary : StringDictionary, IEnumerable
  39         {
  40                 Hashtable table;
  41
  42                 public ProcessStringDictionary ()
  43                 {
  44                         IHashCodeProvider hash_provider = null;
  45                         IComparer comparer = null;
  46
  47                         // check for non-Unix platforms - see FAQ for more details
  48                         // http://www.mono-project.com/FAQ:_Technical#How_to_detect_the_execution_platform_.3F
  49                         int platform = (int) Environment.OSVersion.Platform;
  50                         if ((platform != 4) && (platform != 128)) {
  51                                 hash_provider = CaseInsensitiveHashCodeProvider.DefaultInvariant;
  52                                 comparer = CaseInsensitiveComparer.DefaultInvariant;
  53                         }
  54
  55                         table = new Hashtable (hash_provider, comparer);
  56                 }
  57
  58                 public override int Count {
  59                         get { return table.Count; }
  60                 }
  61
  62                 public override bool IsSynchronized {
  63                         get { return false; }
  64                 }
  65
  66                 public override string this [string key] {
  67                         get { return (string) table [key]; }
  68
  69                         set { table [key] = value; }
  70                 }
  71
  72                 public override ICollection Keys {
  73                         get {
  74                                 return table.Keys;
  75                         }
  76                 }
  77
  78                 public override ICollection Values {
  79                         get { return table.Values; }
  80                 }
  81
  82                 public override object SyncRoot {
  83                         get { return table.SyncRoot; }
  84                 }
  85
  86                 public override void Add (string key, string value)
  87                 {
  88                         table.Add (key, value);
  89                 }
  90
  91                 public override void Clear ()
  92                 {
  93                         table.Clear ();
  94                 }
  95
  96                 public override bool ContainsKey (string key)
  97                 {
  98                         return table.ContainsKey (key);
  99                 }
 100
 101                 public override bool ContainsValue (string value)
 102                 {
 103                         return table.ContainsValue (value);
 104                 }
 105
 106                 public override void CopyTo (Array array, int index)
 107                 {
 108                         table.CopyTo (array, index);
 109                 }
 110
 111                 public override IEnumerator GetEnumerator ()
 112                 {
 113                         return table.GetEnumerator();
 114                 }
 115
 116                 public override void Remove(string key)
 117                 {
 118                         table.Remove (key);
 119                 }
 120         }
 121 }
 122