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308 lines
14 KiB
308 lines
14 KiB
#nullable enable
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using IPA.Config.Data;
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using IPA.Logging;
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Linq;
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using System.Reflection;
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using System.Reflection.Emit;
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using System.Text;
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using System.Threading.Tasks;
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using Boolean = IPA.Config.Data.Boolean;
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#if NET3
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using Net3_Proxy;
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using Array = Net3_Proxy.Array;
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#endif
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namespace IPA.Config.Stores
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{
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internal static partial class GeneratedStoreImpl
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{
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private static void EmitDeserializeGeneratedValue(ILGenerator il, SerializedMemberInfo member, Type srcType, LocalAllocator GetLocal,
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Action<ILGenerator> thisarg, Action<ILGenerator> parentobj)
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{
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var IGeneratedStore_Deserialize = typeof(IGeneratedStore).GetMethod(nameof(IGeneratedStore.Deserialize));
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using var valuel = GetLocal.Allocate(srcType);
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var noCreate = il.DefineLabel();
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il.Emit(OpCodes.Stloc, valuel);
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EmitLoad(il, member, thisarg);
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il.Emit(OpCodes.Dup);
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il.Emit(OpCodes.Isinst, typeof(IGeneratedStore));
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il.Emit(OpCodes.Brtrue_S, noCreate);
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il.Emit(OpCodes.Pop);
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EmitCreateChildGenerated(il, member.Type, parentobj);
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il.MarkLabel(noCreate);
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il.Emit(OpCodes.Dup);
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il.Emit(OpCodes.Ldloc, valuel);
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il.Emit(OpCodes.Callvirt, IGeneratedStore_Deserialize);
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}
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private static void EmitDeserializeNullable(ILGenerator il, SerializedMemberInfo member, Type expected, LocalAllocator GetLocal,
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Action<ILGenerator> thisarg, Action<ILGenerator> parentobj)
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{
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if (!member.IsNullable) throw new InvalidOperationException("EmitDeserializeNullable called for non-nullable!");
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thisarg ??= il => il.Emit(OpCodes.Ldarg_0);
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parentobj ??= thisarg;
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EmitDeserializeValue(il, member, member.NullableWrappedType, expected, GetLocal, thisarg, parentobj);
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il.Emit(OpCodes.Newobj, member.Nullable_Construct);
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}
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// top of stack is the Value to deserialize; the type will be as returned from GetExpectedValueTypeForType
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// after, top of stack will be thing to write to field
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private static void EmitDeserializeValue(ILGenerator il, SerializedMemberInfo member, Type targetType, Type expected, LocalAllocator GetLocal,
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Action<ILGenerator> thisarg, Action<ILGenerator> parentobj)
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{
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if (typeof(Value).IsAssignableFrom(targetType)) return; // do nothing
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if (expected == typeof(Text))
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{
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var getter = expected.GetProperty(nameof(Text.Value)).GetGetMethod();
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il.Emit(OpCodes.Call, getter);
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if (targetType == typeof(char))
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{
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var strIndex = typeof(string).GetProperty("Chars").GetGetMethod(); // string's indexer is specially named Chars
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il.Emit(OpCodes.Ldc_I4_0);
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il.Emit(OpCodes.Call, strIndex);
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}
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}
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else if (expected == typeof(Boolean))
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{
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var getter = expected.GetProperty(nameof(Boolean.Value)).GetGetMethod();
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il.Emit(OpCodes.Call, getter);
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}
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else if (expected == typeof(Integer))
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{
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var getter = expected.GetProperty(nameof(Integer.Value)).GetGetMethod();
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il.Emit(OpCodes.Call, getter);
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EmitNumberConvertTo(il, targetType, getter.ReturnType);
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}
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else if (expected == typeof(FloatingPoint))
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{
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var getter = expected.GetProperty(nameof(FloatingPoint.Value)).GetGetMethod();
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il.Emit(OpCodes.Call, getter);
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EmitNumberConvertTo(il, targetType, getter.ReturnType);
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} // TODO: implement stuff for lists and maps of various types (probably call out somewhere else to figure out what to do)
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else if (expected == typeof(Map))
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{
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if (!targetType.IsValueType)
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{
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EmitDeserializeGeneratedValue(il, member, expected, GetLocal, thisarg, parentobj);
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}
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else
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{
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using var mapLocal = GetLocal.Allocate(typeof(Map));
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using var resultLocal = GetLocal.Allocate(targetType);
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using var valueLocal = GetLocal.Allocate(typeof(Value));
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var structure = ReadObjectMembers(targetType);
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if (!structure.Any())
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{
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Logger.Config.Warn($"Custom value type {targetType.FullName} (when compiling serialization of" +
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$" {member.Name} on {member.Member.DeclaringType.FullName}) has no accessible members");
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il.Emit(OpCodes.Pop);
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il.Emit(OpCodes.Ldloca, resultLocal);
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il.Emit(OpCodes.Initobj, targetType);
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}
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else
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{
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il.Emit(OpCodes.Stloc, mapLocal);
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// TODO: handle creating a nullable, when applicable
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EmitLoad(il, member, thisarg);
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il.Emit(OpCodes.Stloc, resultLocal);
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EmitDeserializeStructure(il, structure, mapLocal, valueLocal, GetLocal, il => il.Emit(OpCodes.Ldloca, resultLocal), parentobj);
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}
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il.Emit(OpCodes.Ldloc, resultLocal);
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}
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}
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else
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{
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Logger.Config.Warn($"Implicit conversions to {expected} are not currently implemented");
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il.Emit(OpCodes.Pop);
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il.Emit(OpCodes.Ldnull);
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}
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}
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private static void EmitDeserializeStructure(ILGenerator il, IEnumerable<SerializedMemberInfo> structure,
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LocalBuilder mapLocal, LocalBuilder valueLocal,
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LocalAllocator GetLocal, Action<ILGenerator> thisobj, Action<ILGenerator> parentobj)
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{
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var Map_TryGetValue = typeof(Map).GetMethod(nameof(Map.TryGetValue));
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// head of stack is Map instance
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foreach (var mem in structure)
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{
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var nextLabel = il.DefineLabel();
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var endErrorLabel = il.DefineLabel();
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il.Emit(OpCodes.Ldloc, mapLocal);
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il.Emit(OpCodes.Ldstr, mem.Name);
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il.Emit(OpCodes.Ldloca_S, valueLocal);
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il.Emit(OpCodes.Call, Map_TryGetValue);
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il.Emit(OpCodes.Brtrue_S, endErrorLabel);
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EmitLogError(il, $"Missing key {mem.Name}", tailcall: false);
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il.Emit(OpCodes.Br, nextLabel);
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il.MarkLabel(endErrorLabel);
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il.Emit(OpCodes.Ldloc_S, valueLocal);
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EmitDeserializeMember(il, mem, nextLabel, il => il.Emit(OpCodes.Ldloc_S, valueLocal), GetLocal, thisobj, parentobj);
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il.MarkLabel(nextLabel);
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}
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}
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private static void EmitDeserializeConverter(ILGenerator il, SerializedMemberInfo member, Label nextLabel, LocalAllocator GetLocal,
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Action<ILGenerator> thisobj, Action<ILGenerator> parentobj)
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{
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if (!member.HasConverter)
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throw new InvalidOperationException("EmitDeserializeConverter called for member without converter");
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using var stlocal = GetLocal.Allocate(typeof(Value));
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using var valLocal = GetLocal.Allocate(member.Type);
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il.Emit(OpCodes.Stloc, stlocal);
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il.BeginExceptionBlock();
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il.Emit(OpCodes.Ldsfld, member.ConverterField);
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il.Emit(OpCodes.Ldloc, stlocal);
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parentobj(il);
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if (member.IsGenericConverter)
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{
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var fromValueBase = member.ConverterBase.GetMethod(nameof(ValueConverter<int>.FromValue),
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new[] { typeof(Value), typeof(object) });
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var fromValue = member.Converter.GetMethods(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance)
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.FirstOrDefault(m => m.GetBaseDefinition() == fromValueBase) ?? fromValueBase;
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il.Emit(OpCodes.Call, fromValue);
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}
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else
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{
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var fromValueBase = typeof(IValueConverter).GetMethod(nameof(IValueConverter.FromValue),
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new[] { typeof(Value), typeof(object) });
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var fromValue = member.Converter.GetMethods(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance)
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.FirstOrDefault(m => m.GetBaseDefinition() == fromValueBase) ?? fromValueBase;
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il.Emit(OpCodes.Call, fromValue);
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if (member.Type.IsValueType)
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il.Emit(OpCodes.Unbox);
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}
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il.Emit(OpCodes.Stloc, valLocal);
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il.BeginCatchBlock(typeof(Exception));
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EmitWarnException(il, "Error occurred while deserializing");
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il.Emit(OpCodes.Leave, nextLabel);
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il.EndExceptionBlock();
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il.Emit(OpCodes.Ldloc, valLocal);
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}
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// emit takes the value being deserialized, logs on error, leaves nothing on stack
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private static void EmitDeserializeMember(ILGenerator il, SerializedMemberInfo member, Label nextLabel, Action<ILGenerator> getValue, LocalAllocator GetLocal,
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Action<ILGenerator> thisobj, Action<ILGenerator> parentobj)
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{
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var Object_GetType = typeof(object).GetMethod(nameof(Object.GetType));
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var implLabel = il.DefineLabel();
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var passedTypeCheck = il.DefineLabel();
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var expectType = GetExpectedValueTypeForType(member.ConversionType);
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il.Emit(OpCodes.Dup);
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il.Emit(OpCodes.Brtrue_S, implLabel); // null check
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if (!member.AllowNull)
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{
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il.Emit(OpCodes.Pop);
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EmitLogError(il, $"Member {member.Name} ({member.Type}) not nullable", tailcall: false,
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expected: il => EmitTypeof(il, expectType));
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il.Emit(OpCodes.Br, nextLabel);
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}
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else if (member.IsNullable)
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{
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il.Emit(OpCodes.Pop);
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using var valTLocal = GetLocal.Allocate(member.Type);
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il.Emit(OpCodes.Ldloca, valTLocal);
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il.Emit(OpCodes.Initobj, member.Type);
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EmitStore(il, member, il => il.Emit(OpCodes.Ldloc, valTLocal), thisobj);
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il.Emit(OpCodes.Br, nextLabel);
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}
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else
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{
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il.Emit(OpCodes.Pop);
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EmitStore(il, member, il => il.Emit(OpCodes.Ldnull), thisobj);
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il.Emit(OpCodes.Br, nextLabel);
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}
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if (!member.HasConverter)
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{
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il.MarkLabel(implLabel);
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il.Emit(OpCodes.Isinst, expectType); //replaces on stack
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il.Emit(OpCodes.Dup); // duplicate cloned value
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il.Emit(OpCodes.Brtrue, passedTypeCheck); // null check
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}
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var errorHandle = il.DefineLabel();
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// special cases to handle coersion between Float and Int
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if (member.HasConverter)
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il.MarkLabel(implLabel);
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else if (expectType == typeof(FloatingPoint))
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{
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var specialTypeCheck = il.DefineLabel();
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il.Emit(OpCodes.Pop);
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getValue(il);
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il.Emit(OpCodes.Isinst, typeof(Integer)); //replaces on stack
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il.Emit(OpCodes.Dup); // duplicate cloned value
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il.Emit(OpCodes.Brfalse, errorHandle); // null check
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var Integer_CoerceToFloat = typeof(Integer).GetMethod(nameof(Integer.AsFloat));
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il.Emit(OpCodes.Call, Integer_CoerceToFloat);
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il.Emit(OpCodes.Br, passedTypeCheck);
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}
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else if (expectType == typeof(Integer))
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{
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var specialTypeCheck = il.DefineLabel();
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il.Emit(OpCodes.Pop);
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getValue(il);
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il.Emit(OpCodes.Isinst, typeof(FloatingPoint)); //replaces on stack
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il.Emit(OpCodes.Dup); // duplicate cloned value
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il.Emit(OpCodes.Brfalse, errorHandle); // null check
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var Float_CoerceToInt = typeof(FloatingPoint).GetMethod(nameof(FloatingPoint.AsInteger));
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il.Emit(OpCodes.Call, Float_CoerceToInt);
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il.Emit(OpCodes.Br, passedTypeCheck);
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}
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if (!member.HasConverter)
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{
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il.MarkLabel(errorHandle);
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il.Emit(OpCodes.Pop);
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EmitLogError(il, $"Unexpected type deserializing {member.Name}", tailcall: false,
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expected: il => EmitTypeof(il, expectType), found: il =>
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{
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getValue(il);
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il.Emit(OpCodes.Callvirt, Object_GetType);
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});
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il.Emit(OpCodes.Br, nextLabel);
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}
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il.MarkLabel(passedTypeCheck);
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using var local = GetLocal.Allocate(member.Type);
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if (member.HasConverter) EmitDeserializeConverter(il, member, nextLabel, GetLocal, thisobj, parentobj);
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else if (member.IsNullable) EmitDeserializeNullable(il, member, expectType, GetLocal, thisobj, parentobj);
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else EmitDeserializeValue(il, member, member.Type, expectType, GetLocal, thisobj, parentobj);
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il.Emit(OpCodes.Stloc, local);
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EmitStore(il, member, il => il.Emit(OpCodes.Ldloc, local), thisobj);
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}
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}
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}
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