File size: 2,514 Bytes
8c763fb | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 | // Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.
using System;
using System.Globalization;
using System.Management.Automation;
using System.Reflection;
using System.Reflection.Emit;
using Microsoft.PowerShell.Cmdletization.Xml;
namespace Microsoft.PowerShell.Cmdletization
{
internal static class EnumWriter
{
private const string namespacePrefix = "Microsoft.PowerShell.Cmdletization.GeneratedTypes";
private static ModuleBuilder CreateModuleBuilder()
{
AssemblyName aName = new(namespacePrefix);
AssemblyBuilder ab = AssemblyBuilder.DefineDynamicAssembly(aName, AssemblyBuilderAccess.Run);
ModuleBuilder mb = ab.DefineDynamicModule(aName.Name);
return mb;
}
private static readonly Lazy<ModuleBuilder> s_moduleBuilder = new(CreateModuleBuilder, isThreadSafe: true);
private static readonly object s_moduleBuilderUsageLock = new();
internal static string GetEnumFullName(EnumMetadataEnum enumMetadata)
{
return namespacePrefix + "." + enumMetadata.EnumName;
}
internal static void Compile(EnumMetadataEnum enumMetadata)
{
string fullEnumName = GetEnumFullName(enumMetadata);
Type underlyingType;
if (enumMetadata.UnderlyingType != null)
{
underlyingType = (Type)LanguagePrimitives.ConvertTo(enumMetadata.UnderlyingType, typeof(Type), CultureInfo.InvariantCulture);
}
else
{
underlyingType = typeof(int);
}
ModuleBuilder mb = s_moduleBuilder.Value;
EnumBuilder eb;
lock (s_moduleBuilderUsageLock)
{
eb = mb.DefineEnum(fullEnumName, TypeAttributes.Public, underlyingType);
}
if (enumMetadata.BitwiseFlagsSpecified && enumMetadata.BitwiseFlags)
{
var cab = new CustomAttributeBuilder(typeof(FlagsAttribute).GetConstructor(Type.EmptyTypes), Array.Empty<object>());
eb.SetCustomAttribute(cab);
}
foreach (var value in enumMetadata.Value)
{
string name = value.Name;
object integerValue = LanguagePrimitives.ConvertTo(value.Value, underlyingType, CultureInfo.InvariantCulture);
eb.DefineLiteral(name, integerValue);
}
eb.CreateTypeInfo();
}
}
}
|