class/Mono.Cecil/Mono.Cecil.Metadata/CultureUtils.cs

   1 //
   2 // CultureUtils.cs
   3 //
   4 // Author:
   5 //   Jb Evain (jbevain@gmail.com)
   6 //
   7 // (C) 2005 Jb Evain
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 namespace Mono.Cecil.Metadata {
  30
  31         using System;
  32         using System.Collections;
  33         using System.Globalization;
  34
  35         sealed class CultureUtils {
  36
  37                 static IDictionary m_cultures;
  38
  39                 CultureUtils ()
  40                 {
  41                 }
  42
  43                 static void LoadCultures ()
  44                 {
  45                         if (m_cultures != null)
  46                                 return;
  47
  48 #if CF_1_0 || CF_2_0
  49                         CultureInfo [] cultures = new CultureInfo [0];
  50 #else
  51                         CultureInfo [] cultures = CultureInfo.GetCultures (CultureTypes.AllCultures);
  52 #endif
  53                         m_cultures = new Hashtable (cultures.Length + 2);
  54
  55                         foreach (CultureInfo ci in cultures)
  56                                 if (!m_cultures.Contains (ci.Name))
  57                                         m_cultures.Add (ci.Name, ci);
  58
  59                         if (!m_cultures.Contains (string.Empty))
  60                                 m_cultures.Add (string.Empty, CultureInfo.InvariantCulture);
  61
  62                         m_cultures.Add ("neutral", CultureInfo.InvariantCulture);
  63                 }
  64
  65                 public static bool IsValid (string culture)
  66                 {
  67                         if (culture == null)
  68                                 throw new ArgumentNullException ("culture");
  69
  70                         LoadCultures ();
  71
  72                         return m_cultures.Contains (culture);
  73                 }
  74
  75                 public static CultureInfo GetCultureInfo (string culture)
  76                 {
  77                         if (IsValid (culture))
  78                                 return m_cultures [culture] as CultureInfo;
  79
  80                         return CultureInfo.InvariantCulture;
  81                 }
  82         }
  83 }