mcs/class/System.Runtime.Caching/System.Runtime.Caching/Helpers.cs

   1 //
   2 // ObjectCache.cs
   3 //
   4 // Authors:
   5 //      Marek Habersack <mhabersack@novell.com>
   6 //
   7 // Copyright (C) 2010 Novell, Inc. (http://novell.com/)
   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 using System;
  29 using System.Collections.Generic;
  30
  31 namespace System.Runtime.Caching
  32 {
  33         static class Helpers
  34         {
  35                 public static bool CaseInsensitive {
  36                         get;
  37                         private set;
  38                 }
  39
  40                 public static bool Is64Bit {
  41                         get;
  42                         private set;
  43                 }
  44
  45                 public static IEqualityComparer <string> StringEqualityComparer {
  46                         get; private set;
  47                 }
  48
  49                 public static IComparer <string> StringComparer {
  50                         get; private set;
  51                 }
  52
  53                 public static StringComparison StringComparison {
  54                         get; private set;
  55                 }
  56
  57                 static Helpers ()
  58                 {
  59                         PlatformID pid = Environment.OSVersion.Platform;
  60                         bool runningOnWindows = ((int) pid != 128 && pid != PlatformID.Unix && pid != PlatformID.MacOSX);
  61
  62                         Is64Bit = IntPtr.Size == 8;
  63                         if (runningOnWindows)
  64                                 CaseInsensitive = true;
  65                         else {
  66                                 string mono_iomap = Environment.GetEnvironmentVariable ("MONO_IOMAP");
  67                                 if (!String.IsNullOrEmpty (mono_iomap)) {
  68                                         if (mono_iomap == "all")
  69                                                 CaseInsensitive = true;
  70                                         else {
  71                                                 string[] parts = mono_iomap.Split (':');
  72                                                 foreach (string p in parts) {
  73                                                         if (p == "all" || p == "case") {
  74                                                                 CaseInsensitive = true;
  75                                                                 break;
  76                                                         }
  77                                                 }
  78                                         }
  79                                 }
  80                         }
  81
  82                         if (CaseInsensitive) {
  83                                 StringEqualityComparer = global::System.StringComparer.OrdinalIgnoreCase;
  84                                 StringComparer = global::System.StringComparer.OrdinalIgnoreCase;
  85                                 StringComparison = global::System.StringComparison.OrdinalIgnoreCase;
  86                         } else {
  87                                 StringEqualityComparer = global::System.StringComparer.Ordinal;
  88                                 StringComparer = global::System.StringComparer.Ordinal;
  89                                 StringComparison = global::System.StringComparison.Ordinal;
  90
  91                         }
  92                 }
  93         }
  94 }