bbradson
592 lines
19 KiB
C#
592 lines
19 KiB
C#
// Copyright (c) 2022 bradson
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at https://mozilla.org/MPL/2.0/.
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using System.Diagnostics;
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using System.Diagnostics.CodeAnalysis;
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using System.Linq;
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using System.Linq.Expressions;
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using System.Reflection.Emit;
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using System.Runtime.CompilerServices;
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using System.Security;
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using System.Text;
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using System.Threading.Tasks;
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using FisheryLib.Pools;
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using Verse;
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namespace FisheryLib;
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[PublicAPI]
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public static class Reflection
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{
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private static Assembly[] _allAssemblies = Array.Empty<Assembly>();
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private static object _allAssembliesLock = new();
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public static CodeInstructions GetCodeInstructions(Delegate method, ILGenerator? generator = null)
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=> GetCodeInstructions(method.Method, generator);
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public static CodeInstructions GetCodeInstructions(Expression<Action> method, ILGenerator? generator = null)
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=> GetCodeInstructions(SymbolExtensions.GetMethodInfo(method), generator);
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public static CodeInstructions GetCodeInstructions(MethodInfo method, ILGenerator? generator = null)
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=> PatchProcessor.GetCurrentInstructions(method, generator: generator);
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public static CodeInstructions MakeReplacementCall(Delegate method) => MakeReplacementCall(method.Method);
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public static CodeInstructions MakeReplacementCall(MethodInfo method)
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{
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if (!method.IsStatic)
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yield return FishTranspiler.This;
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foreach (var argument in method.GetParameters())
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yield return FishTranspiler.Argument(argument);
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yield return FishTranspiler.Call(method);
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yield return FishTranspiler.Return;
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}
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public static Assembly[] AllAssemblies
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{
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get
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{
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lock (_allAssembliesLock)
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{
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return _allAssemblies.Length == AppDomain.CurrentDomain.GetAssemblies().Length
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? _allAssemblies
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: _allAssemblies = AccessTools.AllAssemblies().ToArray();
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}
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}
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}
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public static Type? Type(string assembly, string typeFullName)
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=> System.Type.GetType(string.Concat(typeFullName, ", ", assembly));
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public static Type? Type(string assembly, string @namespace, string type)
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=> System.Type.GetType(StringHelper.Resolve($"{@namespace}.{type}, {assembly}"));
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public static Type? Type(string fullName)
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{
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var assemblies = AllAssemblies;
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for (var i = assemblies.Length; i-- > 0;)
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{
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if (assemblies[i].GetType(fullName) is { } type)
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return type;
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}
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return null;
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}
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public static MethodInfo MethodInfo<T>(T method) where T : Delegate => method.Method;
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public static MethodInfo? MethodInfo(string assembly, string type, string name, Type[]? parameters = null,
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Type[]? generics = null)
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=> AccessTools.Method(Type(assembly, type), name, parameters, generics);
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public static IEnumerable<MethodInfo> MethodsOfName(Type type, string name)
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=> MethodsOfNameInternal(type, name, true);
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private static void ThrowForMethodsOfName(Type? type, string name)
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=> ThrowHelper.ThrowArgumentException($"No methods found for {type.FullDescription()}:{name}");
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public static IEnumerable<MethodInfo> MethodsOfNameSilentFail(Type? type, string name)
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=> MethodsOfNameInternal(type, name, false);
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private static IEnumerable<MethodInfo> MethodsOfNameInternal(Type? type, string name, bool throwWhenEmpty)
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{
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var methods = type?.GetMethods(AccessTools.allDeclared);
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if (methods is null)
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{
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if (throwWhenEmpty)
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ThrowForMethodsOfName(type, name);
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yield break;
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}
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var count = 0;
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for (var i = 0; i < methods.Length; i++)
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{
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if (methods[i].Name != name)
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continue;
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count++;
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yield return methods[i];
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}
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if (throwWhenEmpty && count < 1)
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ThrowForMethodsOfName(type, name);
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}
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public static FieldInfo? FieldInfo(string assembly, string type, string name)
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=> AccessTools.Field(Type(assembly, type), name);
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public static MethodInfo? GetGenericMethod(this Type type, string name, params Type[] typeArguments)
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=> type.GetMethod(name)?.MakeGenericMethod(typeArguments);
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public static MethodInfo? GetGenericMethod(this Type type, string name, BindingFlags bindingAttr,
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params Type[] typeArguments)
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=> type.GetMethod(name, bindingAttr)?.MakeGenericMethod(typeArguments);
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public static bool IsAssignableTo(this Type type, [NotNullWhen(true)] Type? targetType, params Type[] generics)
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{
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Guard.IsNotNull(type);
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return targetType != null
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&& (generics is { Length: >= 1 }
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? targetType.MakeGenericType(generics)
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: targetType)
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.IsAssignableFrom(type);
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}
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public static bool AreAssignableFrom(this IEnumerable<Type> types, IEnumerable<Type> targetTypes)
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=> targetTypes.AreAssignableTo(types);
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public static bool AreAssignableTo(this IEnumerable<Type> types, IEnumerable<Type> targetTypes)
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{
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Guard.IsNotNull(types);
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Guard.IsNotNull(targetTypes);
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using var typesEnumerator = types.GetEnumerator();
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using var targetTypesEnumerator = targetTypes.GetEnumerator();
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while (typesEnumerator.MoveNext())
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{
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if (!targetTypesEnumerator.MoveNext()
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|| !targetTypesEnumerator.Current!.IsAssignableFrom(typesEnumerator.Current))
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return false;
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}
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return !targetTypesEnumerator.MoveNext();
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}
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public static bool IsNullable(this Type type)
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{
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Guard.IsNotNull(type);
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return type.IsGenericType
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&& type.GetGenericTypeDefinition() == typeof(Nullable<>);
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}
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public static bool IsNullable(this Type nullableType, [NotNullWhen(true)] out Type? valueType)
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{
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if (nullableType.IsNullable())
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{
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valueType = nullableType.GetGenericArguments()[0];
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return true;
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}
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else
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{
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valueType = null;
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return false;
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}
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}
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public static Type GetDelegateReturnType(this Type type)
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{
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Guard.IsTypeAssignableToType(type, typeof(Delegate));
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return type.GetMethod("Invoke")!.ReturnType;
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}
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public static ParameterInfo[] GetDelegateParameters(this Type type)
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{
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Guard.IsTypeAssignableToType(type, typeof(Delegate));
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return type.GetMethod("Invoke")!.GetParameters();
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}
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public static bool HasGenericInterfaceDefinition(this Type type, Type interfaceType)
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{
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Guard.IsNotNull(type);
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return Array.Exists(type.GetInterfaces(), @interface
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=> @interface.IsGenericType
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&& @interface.GetGenericTypeDefinition() == interfaceType);
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}
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[SecuritySafeCritical]
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public static IntPtr GetFunctionPointer(this MethodBase method) => method.MethodHandle.GetFunctionPointer();
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[SecuritySafeCritical]
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public static unsafe delegate*<T> GetFunctionPointer<T>(this MethodBase method)
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=> (delegate*<T>)method.MethodHandle.GetFunctionPointer();
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[SecuritySafeCritical]
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public static unsafe delegate*<T_in, T_out> GetFunctionPointer<T_in, T_out>(this MethodBase method)
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=> (delegate*<T_in, T_out>)method.MethodHandle.GetFunctionPointer();
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[SecuritySafeCritical]
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public static unsafe delegate*<T1, T2, T_out> GetFunctionPointer<T1, T2, T_out>(this MethodBase method)
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=> (delegate*<T1, T2, T_out>)method.MethodHandle.GetFunctionPointer();
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[SecuritySafeCritical]
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public static unsafe delegate*<T1, T2, T3, T_out> GetFunctionPointer<T1, T2, T3, T_out>(this MethodBase method)
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=> (delegate*<T1, T2, T3, T_out>)method.MethodHandle.GetFunctionPointer();
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[SecuritySafeCritical]
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public static unsafe delegate*<T1, T2, T3, T4, T_out>
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GetFunctionPointer<T1, T2, T3, T4, T_out>(this MethodBase method)
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=> (delegate*<T1, T2, T3, T4, T_out>)method.MethodHandle.GetFunctionPointer();
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[SecuritySafeCritical]
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public static unsafe delegate*<T1, T2, T3, T4, T5, T_out>
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GetFunctionPointer<T1, T2, T3, T4, T5, T_out>(this MethodBase method)
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=> (delegate*<T1, T2, T3, T4, T5, T_out>)method.MethodHandle.GetFunctionPointer();
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[SecuritySafeCritical]
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public static unsafe delegate*<T1, T2, T3, T4, T5, T6, T_out>
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GetFunctionPointer<T1, T2, T3, T4, T5, T6, T_out>(this MethodBase method)
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=> (delegate*<T1, T2, T3, T4, T5, T6, T_out>)method.MethodHandle.GetFunctionPointer();
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[SecuritySafeCritical]
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public static unsafe delegate*<T1, T2, T3, T4, T5, T6, T7, T_out>
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GetFunctionPointer<T1, T2, T3, T4, T5, T6, T7, T_out>(this MethodBase method)
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=> (delegate*<T1, T2, T3, T4, T5, T6, T7, T_out>)method.MethodHandle.GetFunctionPointer();
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/// <summary>
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/// Finds a constructor with parameters that are either assignable to or assignable from the types in the provided
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/// parameters array
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/// </summary>
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/// <param name="type">The type of the object to construct</param>
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/// <param name="parameters">
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/// An array of parameter types that are either assignable to or from the parameters of a constructor for the
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/// target type
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/// </param>
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/// <param name="searchForStatic">Search for static constructors instead of instance constructors</param>
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/// <param name="throwOnFailure">Throw an exception on failure to find a matching constructor</param>
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/// <returns>
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/// A ConstructorInfo that best matches the provided arguments. Null on failure if throwOnFailure is set to false
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/// </returns>
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public static ConstructorInfo? MatchingConstructor(Type type, Type[]? parameters = null,
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bool searchForStatic = false, bool throwOnFailure = true)
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{
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Guard.IsNotNull(type);
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parameters ??= Array.Empty<Type>();
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var flags = searchForStatic ? AccessTools.all & ~BindingFlags.Instance : AccessTools.all & ~BindingFlags.Static;
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return TryGetConstructor(type, flags, paramTypes => paramTypes.AreAssignableFrom(parameters))
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?? TryGetConstructor(type, flags, paramTypes => paramTypes.AreAssignableTo(parameters))
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?? (throwOnFailure
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? ThrowHelper.ThrowInvalidOperationException<ConstructorInfo>(
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$"No constructor found for type: {type}, parameters: {
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parameters.ToStringSafeEnumerable()}, static: {searchForStatic}, found constructors: {
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type.GetConstructors(flags).ToStringSafeEnumerable()}")
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: null);
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}
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private static ConstructorInfo? TryGetConstructor(Type type, BindingFlags flags,
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Predicate<IEnumerable<Type>> predicate)
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=> type.GetConstructors(flags).FirstOrDefault(c
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=> predicate(c.GetParameters().Select(static p => p.ParameterType)));
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public static T? CreateConstructorDelegate<T>(Type type, params Type[] parameters) where T : Delegate
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{
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try
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{
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Guard.IsTypeAssignableToType(typeof(T), typeof(Delegate));
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var delegateReturnType = typeof(T).GetDelegateReturnType();
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var dm = new DynamicMethod($"FisheryConstructorFunc_{type.Name}{parameters.Length.ToString()}",
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delegateReturnType, parameters, type, true);
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var il = dm.GetILGenerator();
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var needsTempVar = type.IsValueType
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&& parameters.Length == 0
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&& !Array.Exists(type.GetConstructors(AccessTools.allDeclared & ~BindingFlags.Static),
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static c => c.GetParameters().Length == 0);
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var tempVariable = needsTempVar ? FishTranspiler.NewLocalVariable(type, il) : default;
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if (needsTempVar)
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il.Emit(tempVariable.Load().Address());
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for (var i = 0; i < parameters.Length; i++)
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il.Emit(FishTranspiler.Argument(i));
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il.Emit(FishTranspiler.New(type, parameters));
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if (needsTempVar)
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il.Emit(tempVariable.Load());
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if (delegateReturnType != type)
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{
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if (type.IsValueType
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&& (delegateReturnType == typeof(object)
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|| (delegateReturnType.IsInterface && type.IsAssignableTo(delegateReturnType))))
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{
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il.Emit(FishTranspiler.Box(type));
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}
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else if (delegateReturnType != typeof(IConvertible)
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&& delegateReturnType.IsAssignableTo(typeof(IConvertible))
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&& type.IsAssignableTo(typeof(IConvertible)))
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{
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il.Emit(FishTranspiler.Call(Array.Find(typeof(Convert).GetMethods(),
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static m => m.GetParameters().Length == 1 && m.Name == "Type")
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.MakeGenericMethod(type, delegateReturnType)));
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}
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else if (!type.IsAssignableTo(delegateReturnType))
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{
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il.Emit(FishTranspiler.Cast(delegateReturnType));
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}
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}
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il.Emit(FishTranspiler.Return);
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return (T)dm.CreateDelegate(typeof(T));
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}
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catch (Exception e)
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{
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Log.Error($"Failed creating a constructor delegate for {type.FullDescription()} with parameters {
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parameters.ToStringSafeEnumerable()}\n{e}\n{new StackTrace()}");
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return null;
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}
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}
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[SecuritySafeCritical]
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public static string FullDescription(this MemberInfo? memberInfo)
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=> memberInfo switch
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{
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MethodBase methodBase => GeneralExtensions.FullDescription(methodBase),
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Type type => GeneralExtensions.FullDescription(type),
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_ => FullDescriptionInternal(memberInfo)
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};
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private static string FullDescriptionInternal(MemberInfo? memberInfo)
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{
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if (memberInfo is null)
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return "NULL";
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using var pooledStringBuilder = new PooledStringBuilder();
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var stringBuilder = pooledStringBuilder.Builder;
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switch (memberInfo)
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{
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case FieldInfo fieldInfo:
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AppendFieldPrefix(fieldInfo, stringBuilder);
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break;
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case PropertyInfo propertyInfo:
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AppendPropertyPrefix(propertyInfo, stringBuilder);
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break;
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case EventInfo eventInfo:
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AppendEventPrefix(eventInfo, stringBuilder);
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break;
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}
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if (memberInfo.DeclaringType != null)
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stringBuilder.AppendType(memberInfo.DeclaringType).Append("::");
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stringBuilder.Append(memberInfo.Name);
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if (memberInfo is PropertyInfo propertyInfo1)
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AppendPropertyPostfix(stringBuilder, propertyInfo1);
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return pooledStringBuilder.ToString();
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}
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private static void AppendFieldPrefix(FieldInfo fieldInfo, StringBuilder stringBuilder)
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{
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if (fieldInfo.IsPublic)
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stringBuilder.Append("public ");
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if (fieldInfo is { IsLiteral: true, IsInitOnly: false })
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stringBuilder.Append("const ");
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else if (fieldInfo.IsStatic)
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stringBuilder.Append("static ");
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stringBuilder.AppendType(fieldInfo.FieldType).Append(' ');
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}
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private static void AppendPropertyPrefix(PropertyInfo propertyInfo, StringBuilder stringBuilder)
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{
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if ((propertyInfo.GetMethod?.IsPublic ?? false)
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|| (propertyInfo.SetMethod?.IsPublic ?? false))
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{
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stringBuilder.Append("public ");
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}
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if ((propertyInfo.GetMethod?.IsStatic ?? true)
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&& (propertyInfo.SetMethod?.IsStatic ?? true))
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{
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stringBuilder.Append("static ");
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}
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stringBuilder.AppendType(propertyInfo.PropertyType).Append(' ');
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}
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private static void AppendPropertyPostfix(StringBuilder stringBuilder, PropertyInfo propertyInfo)
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{
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stringBuilder.Append(" { ");
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var getMethod = propertyInfo.GetMethod;
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var setMethod = propertyInfo.SetMethod;
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if (getMethod is not null)
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{
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if (getMethod.IsPrivate && !(setMethod?.IsPrivate ?? true))
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stringBuilder.Append("private ");
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stringBuilder.Append("get; ");
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}
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if (setMethod is not null)
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{
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if (setMethod.IsPrivate && !(getMethod?.IsPrivate ?? true))
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stringBuilder.Append("private ");
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stringBuilder.Append("set; ");
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}
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stringBuilder.Append('}');
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}
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private static void AppendEventPrefix(EventInfo eventInfo, StringBuilder stringBuilder)
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{
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if ((eventInfo.AddMethod?.IsPublic ?? true)
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&& (eventInfo.RemoveMethod?.IsPublic ?? true))
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{
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stringBuilder.Append("public ");
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}
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if ((eventInfo.AddMethod?.IsStatic ?? true)
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&& (eventInfo.RemoveMethod?.IsStatic ?? true))
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{
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stringBuilder.Append("static ");
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}
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stringBuilder.Append("event ");
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stringBuilder.AppendType(eventInfo.EventHandlerType).Append(' ');
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}
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private static StringBuilder AppendType(this StringBuilder stringBuilder, Type type)
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=> stringBuilder.Append(type.FullDescription());
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private static T CreateInstanceUsingActivator<T>(params object?[] args)
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=> (T)Activator.CreateInstance(typeof(T),
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BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.CreateInstance, null,
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args, null, null);
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static T New<T>() => Create<T>.@new();
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static T_result New<T_result, T_argument>(T_argument argument)
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=> Create<T_result, T_argument>.@new(argument);
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static T_result New<T_result, T1, T2>(T1 arg1, T2 arg2) => Create<T_result, T1, T2>.@new(arg1, arg2);
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static T_result New<T_result, T1, T2, T3>(T1 arg1, T2 arg2, T3 arg3)
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=> Create<T_result, T1, T2, T3>.@new(arg1, arg2, arg3);
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static T_result New<T_result, T1, T2, T3, T4>(T1 arg1, T2 arg2, T3 arg3, T4 arg4)
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=> Create<T_result, T1, T2, T3, T4>.@new(arg1, arg2, arg3, arg4);
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[MethodImpl(MethodImplOptions.AggressiveInlining)]
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public static T_result New<T_result, T1, T2, T3, T4, T5>(T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5)
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=> Create<T_result, T1, T2, T3, T4, T5>.@new(arg1, arg2, arg3, arg4, arg5);
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private static class Create<T>
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{
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internal static volatile Func<T> @new = SimpleFunc;
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static Create() => Task.Run(ConstructorTask);
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private static T SimpleFunc() => (T)Activator.CreateInstance(typeof(T), true);
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private static void ConstructorTask()
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{
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if (CreateConstructorDelegate<Func<T>>(typeof(T), Array.Empty<Type>()) is { } newFunc)
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@new = newFunc;
|
|
}
|
|
}
|
|
|
|
private static class Create<TResult, TArgument>
|
|
{
|
|
internal static volatile Func<TArgument, TResult> @new = SimpleFunc;
|
|
|
|
static Create() => Task.Run(ConstructorTask);
|
|
|
|
private static TResult SimpleFunc(TArgument argument) => CreateInstanceUsingActivator<TResult>(argument);
|
|
|
|
private static void ConstructorTask()
|
|
{
|
|
if (CreateConstructorDelegate<Func<TArgument, TResult>>(typeof(TResult), typeof(TArgument)) is { } newFunc)
|
|
@new = newFunc;
|
|
}
|
|
}
|
|
|
|
private static class Create<TResult, T1, T2>
|
|
{
|
|
internal static volatile Func<T1, T2, TResult> @new = SimpleFunc;
|
|
|
|
static Create() => Task.Run(ConstructorTask);
|
|
|
|
private static TResult SimpleFunc(T1 first, T2 second) => CreateInstanceUsingActivator<TResult>(first, second);
|
|
|
|
private static void ConstructorTask()
|
|
{
|
|
if (CreateConstructorDelegate<Func<T1, T2, TResult>>(typeof(TResult), typeof(T1), typeof(T2)) is { } newFunc)
|
|
@new = newFunc;
|
|
}
|
|
}
|
|
|
|
private static class Create<TResult, T1, T2, T3>
|
|
{
|
|
internal static volatile Func<T1, T2, T3, TResult> @new = SimpleFunc;
|
|
|
|
static Create() => Task.Run(ConstructorTask);
|
|
|
|
private static TResult SimpleFunc(T1 first, T2 second, T3 third)
|
|
=> CreateInstanceUsingActivator<TResult>(first, second, third);
|
|
|
|
private static void ConstructorTask()
|
|
{
|
|
if (CreateConstructorDelegate<Func<T1, T2, T3, TResult>>(typeof(TResult), typeof(T1), typeof(T2), typeof(T3))
|
|
is { } newFunc)
|
|
{
|
|
@new = newFunc;
|
|
}
|
|
}
|
|
}
|
|
|
|
private static class Create<TResult, T1, T2, T3, T4>
|
|
{
|
|
internal static volatile Func<T1, T2, T3, T4, TResult> @new = SimpleFunc;
|
|
|
|
static Create() => Task.Run(ConstructorTask);
|
|
|
|
private static TResult SimpleFunc(T1 first, T2 second, T3 third, T4 fourth)
|
|
=> CreateInstanceUsingActivator<TResult>(first, second, third, fourth);
|
|
|
|
private static void ConstructorTask()
|
|
{
|
|
if (CreateConstructorDelegate<Func<T1, T2, T3, T4, TResult>>(typeof(TResult), typeof(T1), typeof(T2), typeof(T3),
|
|
typeof(T4)) is { } newFunc)
|
|
{
|
|
@new = newFunc;
|
|
}
|
|
}
|
|
}
|
|
|
|
private static class Create<TResult, T1, T2, T3, T4, T5>
|
|
{
|
|
internal static volatile Func<T1, T2, T3, T4, T5, TResult> @new = SimpleFunc;
|
|
|
|
static Create() => Task.Run(ConstructorTask);
|
|
|
|
private static TResult SimpleFunc(T1 first, T2 second, T3 third, T4 fourth, T5 fifth)
|
|
=> CreateInstanceUsingActivator<TResult>(first, second, third, fourth, fifth);
|
|
|
|
private static void ConstructorTask()
|
|
{
|
|
if (CreateConstructorDelegate<Func<T1, T2, T3, T4, T5, TResult>>(typeof(TResult), typeof(T1), typeof(T2),
|
|
typeof(T3), typeof(T4), typeof(T5)) is { } newFunc)
|
|
{
|
|
@new = newFunc;
|
|
}
|
|
}
|
|
}
|
|
} |