mcs/class/referencesource/mscorlib/system/globalization/globalizationassembly.cs

   1 // ==++==
   2 //
   3 //   Copyright (c) Microsoft Corporation.  All rights reserved.
   4 //
   5 // ==--==
   6
   7 namespace System.Globalization {
   8     using System;
   9     using System.Reflection;
  10     using System.Collections;
  11     using System.Collections.Generic;
  12     using System.Threading;
  13     using System.Security;
  14     using System.Security.Principal;
  15     using System.Security.Permissions;
  16     using System.Runtime.CompilerServices;
  17     using System.Runtime.ConstrainedExecution;
  18     using System.Runtime.Versioning;
  19     using System.IO;
  20     using System.Diagnostics.Contracts;
  21
  22
  23     /*=================================GlobalizationAssembly==========================
  24     **
  25     ** This class provides the table loading wrapper that calls GetManifestResourceStream
  26     **
  27     ** It used to provide an idea for sort versioning, but that proved to not work
  28     **
  29     ============================================================================*/
  30     internal sealed class GlobalizationAssembly
  31     {
  32         // ----------------------------------------------------------------------------------------------------
  33         //
  34         // Instance data members and instance methods.
  35         //
  36         // ----------------------------------------------------------------------------------------------------
  37         [System.Security.SecurityCritical]  // auto-generated
  38         [ResourceExposure(ResourceScope.Process)]
  39         [ResourceConsumption(ResourceScope.Machine, ResourceScope.Process)]
  40         internal unsafe static byte* GetGlobalizationResourceBytePtr(Assembly assembly, String tableName) {
  41             Contract.Assert(assembly != null, "assembly can not be null.  This should be generally the mscorlib.dll assembly.");
  42             Contract.Assert(tableName != null, "table name can not be null");
  43
  44             Stream stream = assembly.GetManifestResourceStream(tableName);
  45             UnmanagedMemoryStream bytesStream = stream as UnmanagedMemoryStream;
  46             if (bytesStream != null) {
  47                 byte* bytes = bytesStream.PositionPointer;
  48                 if (bytes != null) {
  49                     return (bytes);
  50                 }
  51             }
  52
  53             Contract.Assert(
  54                     false,
  55                     String.Format(
  56                         CultureInfo.CurrentCulture,
  57                         "Didn't get the resource table {0} for System.Globalization from {1}",
  58                         tableName,
  59                         assembly));
  60
  61             // We can not continue if we can't get the resource.
  62             throw new InvalidOperationException();
  63         }
  64
  65     }
  66 }
  67