1 //
2 // System.Web.Util.RuntimeHelpers
3 //
4 // Authors:
5 //      Marek Habersack (mhabersack@novell.com)
6 //
7 // (C) 2006-2010 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 using System;
31 using System.Collections.Generic;
32 using System.ComponentModel;
33 using System.Reflection;
34 using System.Web.Configuration;
35 
36 namespace System.Web.Util
37 {
38 	static class RuntimeHelpers
39 	{
40 		public static bool CaseInsensitive {
41 			get; private set;
42 		}
43 
44 		public static bool DebuggingEnabled {
45 			get {
46 				CompilationSection cs = WebConfigurationManager.GetSection ("system.web/compilation") as CompilationSection;
47 				if (cs != null)
48 					return cs.Debug;
49 
50 				return false;
51 			}
52 		}
53 
54 		public static IEqualityComparer <string> StringEqualityComparer {
55 			get; private set;
56 		}
57 
58 		public static IEqualityComparer <string> StringEqualityComparerCulture {
59 			get; private set;
60 		}
61 
62 		public static bool IsUncShare {
63 			get; private set;
64 		}
65 
66 		public static string MonoVersion {
67 			get; private set;
68 		}
69 
70 		public static bool RunningOnWindows {
71 			get; private set;
72 		}
73 
74 		public static StringComparison StringComparison {
75 			get; private set;
76 		}
77 
78 		public static StringComparison StringComparisonCulture {
79 			get; private set;
80 		}
81 
RuntimeHelpers()82 		static RuntimeHelpers ()
83 		{
84 			PlatformID pid = Environment.OSVersion.Platform;
85 			RunningOnWindows = ((int) pid != 128 && pid != PlatformID.Unix && pid != PlatformID.MacOSX);
86 
87 			if (RunningOnWindows) {
88 				CaseInsensitive = true;
89 				string appDomainAppPath = AppDomain.CurrentDomain.GetData (".appPath") as string;
90 				if (!String.IsNullOrEmpty (appDomainAppPath)) {
91 					try {
92 						IsUncShare = new Uri (appDomainAppPath).IsUnc;
93 					} catch {
94 						// ignore
95 					}
96 				}
97 			} else {
98 				string mono_iomap = Environment.GetEnvironmentVariable ("MONO_IOMAP");
99 				if (!String.IsNullOrEmpty (mono_iomap)) {
100 					if (mono_iomap == "all")
101 						CaseInsensitive = true;
102 					else {
103 						string[] parts = mono_iomap.Split (':');
104 						foreach (string p in parts) {
105 							if (p == "all" || p == "case") {
106 								CaseInsensitive = true;
107 								break;
108 							}
109 						}
110 					}
111 				}
112 			}
113 
114 			if (CaseInsensitive) {
115 				StringEqualityComparer = StringComparer.OrdinalIgnoreCase;
116 				StringEqualityComparerCulture = StringComparer.CurrentCultureIgnoreCase;
117 				StringComparison = StringComparison.OrdinalIgnoreCase;
118 				StringComparisonCulture = StringComparison.CurrentCultureIgnoreCase;
119 			} else {
120 				StringEqualityComparer = StringComparer.Ordinal;
121 				StringEqualityComparerCulture = StringComparer.CurrentCulture;
122 				StringComparison = StringComparison.Ordinal;
123 				StringComparisonCulture = StringComparison.CurrentCulture;
124 			}
125 
126 			string monoVersion = null;
127 			try {
128 				Type monoRuntime = Type.GetType ("Mono.Runtime", false);
129 				if (monoRuntime != null) {
130 					MethodInfo mi = monoRuntime.GetMethod ("GetDisplayName", BindingFlags.Static | BindingFlags.NonPublic);
131 					if (mi != null)
132 						monoVersion = mi.Invoke (null, new object [0]) as string;
133 				}
134 			} catch {
135 				// ignore
136 			}
137 
138 			if (monoVersion == null)
139 				monoVersion = Environment.Version.ToString ();
140 
141 			MonoVersion = monoVersion;
142 		}
143 	}
144 }
145