Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/Util/versioninfo.cs

@@ -0,0 +1,172 @@
+//------------------------------------------------------------------------------
+// <copyright file="versioninfo.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+/*
+ * Support for getting file versions
+ * 
+ * Copyright (c) 1999 Microsoft Corporation
+ */
+
+namespace System.Web.Util {
+    using System.Diagnostics;
+    using System.Globalization;
+    using System.Reflection;
+    using System.Text;
+    using System.Runtime.Serialization.Formatters;
+    using System.Configuration.Assemblies;
+    using System.Security.Permissions;
+
+    //
+    // Support for getting file version of relevant files
+    //
+
+    internal class VersionInfo {
+        static private string _engineVersion;
+        static private string _mscoreeVersion;
+        static private string _exeName;
+        static private object _lock = new object();
+
+        private VersionInfo() {
+        }
+
+        [FileIOPermission(SecurityAction.Assert, Unrestricted = true)]
+        internal static string GetFileVersion(String filename) {
+#if !FEATURE_PAL // FEATURE_PAL does not fully support FileVersionInfo
+            try {
+                FileVersionInfo ver = FileVersionInfo.GetVersionInfo(filename);
+                return string.Format(CultureInfo.InvariantCulture, "{0}.{1}.{2}.{3}",
+                    ver.FileMajorPart, ver.FileMinorPart, ver.FileBuildPart, ver.FilePrivatePart);
+            }
+            catch {
+                return String.Empty;
+            }
+#else // !FEATURE_PAL
+            // ROTORTODO
+            return String.Empty;
+#endif // !FEATURE_PAL
+
+        }
+
+        internal static string GetLoadedModuleFileName(string module) {
+#if !FEATURE_PAL // FEATURE_PAL does not fully support FileVersionInfo
+            IntPtr h = UnsafeNativeMethods.GetModuleHandle(module);
+            if (h == IntPtr.Zero)
+                return null;
+
+            StringBuilder buf = new StringBuilder(256);
+            if (UnsafeNativeMethods.GetModuleFileName(h, buf, 256) == 0)
+                return null;
+
+            String fileName = buf.ToString();
+            if (StringUtil.StringStartsWith(fileName, "\\\\?\\")) // on Whistler GetModuleFileName migth return this
+                fileName = fileName.Substring(4);
+            return fileName;
+#else // !FEATURE_PAL
+            // ROTORTODO
+            return String.Empty;
+#endif // !FEATURE_PAL
+        }
+
+        internal static string GetLoadedModuleVersion(string module) {
+            String filename = GetLoadedModuleFileName(module);
+            if (filename == null)
+                return null;
+            return GetFileVersion(filename);
+        }
+
+        internal static string SystemWebVersion {
+            get {
+
+                // Previously this represented the File version of mscorlib.dll.  Many other libraries in the framework and outside took dependencies on the first three parts of this version 
+                // remaining constant throughout 4.x.  From 4.0 to 4.5.2 this was fine since the file version only incremented the last part.  Starting with 4.6 we switched to a file versioning
+                // scheme that matched the product version.  In order to preserve compatibility with existing libraries, this needs to be hard-coded.
+
+                return "4.0.30319.42000";
+            }
+        }
+
+        internal static string EngineVersion {
+#if !FEATURE_PAL // FEATURE_PAL does not enable IIS-based hosting features
+            get {
+                if (_engineVersion == null) {
+                    lock(_lock) {
+                        if (_engineVersion == null)
+                            _engineVersion = GetLoadedModuleVersion(ModName.ENGINE_FULL_NAME);
+                    }
+                }
+
+                return _engineVersion;
+#else // !FEATURE_PAL
+            // ROTORTODO
+            return "1.2.0.0";
+#endif // !FEATURE_PAL
+            }
+        }
+
+        internal static string ClrVersion {
+            get {
+                if (_mscoreeVersion == null) {
+                    lock(_lock) {
+                        if (_mscoreeVersion == null) {
+                            //@
+
+
+
+
+
+                            // Substring(1) removes the 'v' character. 
+                            _mscoreeVersion =
+                                System.Runtime.InteropServices.RuntimeEnvironment.GetSystemVersion().Substring(1);
+                        }
+                    }
+                }
+
+                return _mscoreeVersion;
+            }
+        }
+
+        internal static string ExeName {
+            get {
+                if (_exeName == null) {
+                    lock(_lock) {
+                        if (_exeName == null) {
+                            String s = GetLoadedModuleFileName(null);
+                            if (s == null)
+                                s = String.Empty;
+
+                            // strip path
+                            int i = s.LastIndexOf('\\');
+                            if (i >= 0)
+                                s = s.Substring(i+1);
+
+                            // strip extension
+                            i = s.LastIndexOf('.');
+                            if (i >= 0)
+                                s = s.Substring(0, i);
+
+                            _exeName = s.ToLower(CultureInfo.InvariantCulture);
+                        }
+                    }
+                }
+
+                return _exeName;
+            }
+        }
+    }
+
+    //
+    // Support for getting OS Flavor
+    //
+
+    internal enum OsFlavor {
+        Undetermined,
+        Other,
+        WebBlade,
+        StdServer,
+        AdvServer,
+        DataCenter,
+    }
+}