mirror of https://github.com/Xpl0itR/protodec.git
Attribute parsing for metadata version >= 29
This commit is contained in:
parent
9b44337c18
commit
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GPG Key ID:
91798184109676AD
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@ -28,7 +28,7 @@ Limitations
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-----------
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- Integers are assumed to be (u)int32/64 as CIL doesn't differentiate between them and sint32/64 and (s)fixed32/64.
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- Package names are not preserved in protobuf compilation so naturally we cannot recover them during decompilation, which may result in naming conflicts.
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- Due to the development branch of Cpp2Il not yet recovering method bodies
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- Due to the development branch of Cpp2Il not yet recovering method bodies, when parsing an Il2Cpp assembly older than metadata version 29
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- The `Name` parameter of `OriginalNameAttribute` is not parsed. In this case, the CIL enum field names are used after conforming them to protobuf conventions.
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- The `Tool` parameter of `GeneratedCodeAttribute` is not compared against when parsing gRPC service methods, which may cause false positives in the event that another tool has generated methods in the service class.
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@ -4,17 +4,19 @@
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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 http://mozilla.org/MPL/2.0/.
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using System;
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using System.Collections.Generic;
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using LibCpp2IL.Reflection;
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using CommunityToolkit.Diagnostics;
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using LibCpp2IL.Metadata;
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namespace LibProtodec.Models.Cil.Il2Cpp;
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public sealed class Il2CppAttribute(Il2CppTypeReflectionData il2CppAttrType) : ICilAttribute
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public sealed class Il2CppAttribute(Il2CppTypeDefinition il2CppAttrType, object?[]? ctorArgValues) : ICilAttribute
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{
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public ICilType Type =>
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Il2CppType.GetOrCreate(il2CppAttrType);
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public IList<object?> ConstructorArgumentValues =>
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throw new NotImplementedException();
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ctorArgValues
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?? ThrowHelper.ThrowNotSupportedException<IList<object?>>(
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"Attribute constructor argument parsing is only available on metadata version 29 or greater.");
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}
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@ -6,8 +6,11 @@
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using SystemEx.Memory;
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using CommunityToolkit.Diagnostics;
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using LibCpp2IL;
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using LibCpp2IL.BinaryStructures;
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using LibCpp2IL.Metadata;
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namespace LibProtodec.Models.Cil.Il2Cpp;
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@ -22,42 +25,282 @@ public abstract class Il2CppMember
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{
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if (_customAttributes is null)
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{
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_customAttributes = GetCustomAttributes().ToArray();
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if (LibCpp2IlMain.MetadataVersion < 29f)
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{
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int attrTypeRngIdx = LibCpp2IlMain.MetadataVersion <= 24f
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? CustomAttributeIndex
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: BinarySearchToken(
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LibCpp2IlMain.TheMetadata!.attributeTypeRanges,
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Token,
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DeclaringAssembly.customAttributeStart,
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(int)DeclaringAssembly.customAttributeCount);
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if (attrTypeRngIdx < 0)
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return _customAttributes = Array.Empty<ICilAttribute>();
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Il2CppCustomAttributeTypeRange attrTypeRng = LibCpp2IlMain.TheMetadata!.attributeTypeRanges[attrTypeRngIdx];
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_customAttributes = new ICilAttribute[attrTypeRng.count];
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for (int attrTypeIdx = 0; attrTypeIdx < attrTypeRng.count; attrTypeIdx++)
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{
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int typeIndex = LibCpp2IlMain.TheMetadata.attributeTypes[attrTypeRng.start + attrTypeIdx];
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var type = LibCpp2IlMain.Binary!.GetType(typeIndex);
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var typeDef = LibCpp2IlMain.TheMetadata.typeDefs[type.Data.ClassIndex];
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_customAttributes[attrTypeIdx] = new Il2CppAttribute(typeDef, null);
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}
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}
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else
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{
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int attrDataRngIdx = BinarySearchToken(
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LibCpp2IlMain.TheMetadata!.AttributeDataRanges,
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Token,
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DeclaringAssembly.customAttributeStart,
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(int)DeclaringAssembly.customAttributeCount);
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if (attrDataRngIdx < 0)
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return _customAttributes = Array.Empty<ICilAttribute>();
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Il2CppCustomAttributeDataRange attrDataRange = LibCpp2IlMain.TheMetadata.AttributeDataRanges[attrDataRngIdx];
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Il2CppCustomAttributeDataRange attrDataRngNext = LibCpp2IlMain.TheMetadata.AttributeDataRanges[attrDataRngIdx + 1];
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long attrDataStart = LibCpp2IlMain.TheMetadata.metadataHeader.attributeDataOffset + attrDataRange.startOffset;
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long attrDataEnd = LibCpp2IlMain.TheMetadata.metadataHeader.attributeDataOffset + attrDataRngNext.startOffset;
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byte[] attrData = LibCpp2IlMain.TheMetadata.ReadByteArrayAtRawAddress(attrDataStart, (int)(attrDataEnd - attrDataStart));
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MemoryReader reader = new(attrData);
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int attributeCount = (int)ReadUnityCompressedUInt32(ref reader);
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Span<uint> ctorIndices = stackalloc uint[attributeCount];
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for (int i = 0; i < attributeCount; i++)
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ctorIndices[i] = reader.ReadUInt32LittleEndian();
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_customAttributes = new ICilAttribute[attributeCount];
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for (int i = 0; i < attributeCount; i++)
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{
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uint ctorArgCount = ReadUnityCompressedUInt32(ref reader);
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uint fieldCount = ReadUnityCompressedUInt32(ref reader);
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uint propCount = ReadUnityCompressedUInt32(ref reader);
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object?[] ctorArgValues = ctorArgCount > 0
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? new object[ctorArgCount]
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: Array.Empty<object?>();
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for (int j = 0; j < ctorArgCount; j++)
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{
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ctorArgValues[j] = ReadValue(ref reader);
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}
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for (uint j = 0; j < fieldCount; j++)
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{
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ReadValue(ref reader);
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ResolveMember(ref reader);
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}
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for (uint j = 0; j < propCount; j++)
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{
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ReadValue(ref reader);
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ResolveMember(ref reader);
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}
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Il2CppMethodDefinition attrCtor = LibCpp2IlMain.TheMetadata.methodDefs[ctorIndices[i]];
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Il2CppTypeDefinition attrType = LibCpp2IlMain.TheMetadata.typeDefs[attrCtor.declaringTypeIdx];
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_customAttributes[i] = new Il2CppAttribute(attrType, ctorArgValues);
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}
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}
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}
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return _customAttributes;
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}
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}
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public IEnumerable<ICilAttribute> GetCustomAttributes()
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{
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if (LibCpp2IlMain.MetadataVersion >= 29)
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{
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throw new NotImplementedException();
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}
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Il2CppCustomAttributeTypeRange? attributeTypeRange = LibCpp2IlMain.TheMetadata!.GetCustomAttributeData(
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DeclaringAssembly, CustomAttributeIndex, Token, out _);
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if (attributeTypeRange is null || attributeTypeRange.count == 0)
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yield break;
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for (int attrIndex = attributeTypeRange.start,
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end = attributeTypeRange.start + attributeTypeRange.count;
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attrIndex < end;
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attrIndex++)
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{
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int typeIndex = LibCpp2IlMain.TheMetadata.attributeTypes[attrIndex];
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yield return new Il2CppAttribute(
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LibCpp2ILUtils.GetTypeReflectionData(
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LibCpp2IlMain.Binary!.GetType(typeIndex)));
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}
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}
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protected abstract Il2CppImageDefinition DeclaringAssembly { get; }
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protected abstract int CustomAttributeIndex { get; }
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protected abstract uint Token { get; }
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private static int BinarySearchToken(IReadOnlyList<IIl2CppTokenProvider> source, uint token, int start, int count)
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{
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int lo = start;
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int hi = start + count - 1;
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while (lo <= hi)
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{
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int i = lo + ((hi - lo) >> 1);
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switch (source[i].Token.CompareTo(token))
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{
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case 0:
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return i;
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case < 0:
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lo = i + 1;
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break;
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default:
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hi = i - 1;
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break;
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}
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}
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return ~lo;
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}
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private static uint ReadUnityCompressedUInt32(ref MemoryReader reader)
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{
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byte byt = reader.ReadByte();
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switch (byt)
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{
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case < 128:
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return byt;
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case 240:
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return reader.ReadUInt32LittleEndian();
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case 254:
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return uint.MaxValue - 1;
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case byte.MaxValue:
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return uint.MaxValue;
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}
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if ((byt & 192) == 192)
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{
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return (byt & ~192U) << 24
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| ((uint)reader.ReadByte() << 16)
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| ((uint)reader.ReadByte() << 8)
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| reader.ReadByte();
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}
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if ((byt & 128) == 128)
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{
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return (byt & ~128U) << 8
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| reader.ReadByte();
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}
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return ThrowHelper.ThrowInvalidDataException<uint>();
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}
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private static int ReadUnityCompressedInt32(ref MemoryReader reader)
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{
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uint unsigned = ReadUnityCompressedUInt32(ref reader);
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if (unsigned == uint.MaxValue)
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return int.MinValue;
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bool isNegative = (unsigned & 1) == 1;
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unsigned >>= 1;
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return isNegative
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? -(int)(unsigned + 1)
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: (int)unsigned;
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}
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private static object? ReadValue(ref MemoryReader reader)
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{
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Il2CppTypeEnum type = (Il2CppTypeEnum)reader.ReadByte();
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return ReadValue(ref reader, type);
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}
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private static object? ReadValue(ref MemoryReader reader, Il2CppTypeEnum type)
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{
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switch (type)
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{
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case Il2CppTypeEnum.IL2CPP_TYPE_ENUM:
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Il2CppTypeEnum underlyingType = ReadEnumUnderlyingType(ref reader);
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return ReadValue(ref reader, underlyingType);
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case Il2CppTypeEnum.IL2CPP_TYPE_SZARRAY:
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return ReadSzArray(ref reader);
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case Il2CppTypeEnum.IL2CPP_TYPE_IL2CPP_TYPE_INDEX:
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int typeIndex = ReadUnityCompressedInt32(ref reader);
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return LibCpp2IlMain.Binary!.GetType(typeIndex);
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case Il2CppTypeEnum.IL2CPP_TYPE_BOOLEAN:
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return reader.ReadBoolean();
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case Il2CppTypeEnum.IL2CPP_TYPE_CHAR:
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return (char)reader.ReadInt16LittleEndian();
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case Il2CppTypeEnum.IL2CPP_TYPE_I1:
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return reader.ReadSByte();
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case Il2CppTypeEnum.IL2CPP_TYPE_U1:
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return reader.ReadByte();
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case Il2CppTypeEnum.IL2CPP_TYPE_I2:
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return reader.ReadInt16LittleEndian();
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case Il2CppTypeEnum.IL2CPP_TYPE_U2:
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return reader.ReadUInt16LittleEndian();
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case Il2CppTypeEnum.IL2CPP_TYPE_I4:
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return ReadUnityCompressedInt32(ref reader);
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case Il2CppTypeEnum.IL2CPP_TYPE_U4:
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return ReadUnityCompressedUInt32(ref reader);
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case Il2CppTypeEnum.IL2CPP_TYPE_I8:
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return reader.ReadInt64LittleEndian();
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case Il2CppTypeEnum.IL2CPP_TYPE_U8:
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return reader.ReadUInt64LittleEndian();
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case Il2CppTypeEnum.IL2CPP_TYPE_R4:
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return reader.ReadSingleLittleEndian();
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case Il2CppTypeEnum.IL2CPP_TYPE_R8:
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return reader.ReadDoubleLittleEndian();
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case Il2CppTypeEnum.IL2CPP_TYPE_STRING:
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return ReadString(ref reader);
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case Il2CppTypeEnum.IL2CPP_TYPE_CLASS:
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case Il2CppTypeEnum.IL2CPP_TYPE_OBJECT:
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case Il2CppTypeEnum.IL2CPP_TYPE_GENERICINST:
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default:
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return ThrowHelper.ThrowNotSupportedException<object>();
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}
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}
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private static Il2CppTypeEnum ReadEnumUnderlyingType(ref MemoryReader reader)
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{
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int typeIdx = ReadUnityCompressedInt32(ref reader);
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var enumType = LibCpp2IlMain.Binary!.GetType(typeIdx);
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var underlyingType = LibCpp2IlMain.Binary.GetType(
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enumType.AsClass().ElementTypeIndex);
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return underlyingType.Type;
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}
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private static object?[]? ReadSzArray(ref MemoryReader reader)
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{
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int arrayLength = ReadUnityCompressedInt32(ref reader);
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if (arrayLength == -1)
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return null;
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Il2CppTypeEnum arrayType = (Il2CppTypeEnum)reader.ReadByte();
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if (arrayType == Il2CppTypeEnum.IL2CPP_TYPE_ENUM)
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arrayType = ReadEnumUnderlyingType(ref reader);
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bool typePrefixed = reader.ReadBoolean();
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if (typePrefixed && arrayType != Il2CppTypeEnum.IL2CPP_TYPE_OBJECT)
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ThrowHelper.ThrowInvalidDataException("Array elements are type-prefixed, but the array type is not object");
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object?[] array = new object?[arrayLength];
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for (int i = 0; i < arrayLength; i++)
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{
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Il2CppTypeEnum elementType = typePrefixed
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? (Il2CppTypeEnum)reader.ReadByte()
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: arrayType;
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array[i] = ReadValue(ref reader, elementType);
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}
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return array;
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}
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private static string? ReadString(ref MemoryReader reader)
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{
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int length = ReadUnityCompressedInt32(ref reader);
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if (length == -1)
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return null;
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ReadOnlySpan<byte> bytes = reader.ReadBytes(length);
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return Encoding.UTF8.GetString(bytes);
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}
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private static void ResolveMember(ref MemoryReader reader)
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{
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// We don't care about attribute properties or fields,
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// so we just read enough to exhaust the stream
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int memberIndex = ReadUnityCompressedInt32(ref reader);
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if (memberIndex < 0)
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{
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uint typeIndex = ReadUnityCompressedUInt32(ref reader);
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memberIndex = -(memberIndex + 1);
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}
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}
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}
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@ -7,7 +7,6 @@
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using System;
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using System.Collections.Concurrent;
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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 CommunityToolkit.Diagnostics;
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using LibCpp2IL;
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@ -20,7 +19,7 @@ public sealed class Il2CppType : Il2CppMember, ICilType
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{
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private readonly Il2CppTypeDefinition _il2CppType;
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private readonly Il2CppTypeReflectionData[] _genericArgs;
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private IList<ICilType>? _genericTypeArguments;
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private ICilType[]? _genericTypeArguments;
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private Il2CppType(Il2CppTypeDefinition il2CppType, Il2CppTypeReflectionData[] genericArgs) =>
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(_il2CppType, _genericArgs) = (il2CppType, genericArgs);
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@ -76,13 +75,13 @@ public sealed class Il2CppType : Il2CppMember, ICilType
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{
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if (_genericTypeArguments is null)
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{
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if (_genericArgs.Length < 1)
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_genericTypeArguments = _genericArgs.Length < 1
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? Array.Empty<ICilType>()
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: new ICilType[_genericArgs.Length];
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for (int i = 0; i < _genericArgs.Length; i++)
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{
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_genericTypeArguments = Array.Empty<ICilType>();
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}
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else
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{
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_genericTypeArguments = _genericArgs.Select(GetOrCreate).ToList();
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_genericTypeArguments[i] = GetOrCreate(_genericArgs[i]);
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}
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}
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@ -92,38 +91,42 @@ public sealed class Il2CppType : Il2CppMember, ICilType
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public IEnumerable<ICilField> GetFields()
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{
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for (int idx = _il2CppType.FirstFieldIdx, end = _il2CppType.FirstFieldIdx + _il2CppType.FieldCount; idx < end; idx++)
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for (int i = 0; i < _il2CppType.FieldCount; i++)
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{
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yield return new Il2CppField(
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LibCpp2IlMain.TheMetadata!.fieldDefs[idx]);
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LibCpp2IlMain.TheMetadata!.fieldDefs[
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_il2CppType.FirstFieldIdx + i]);
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}
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}
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public IEnumerable<ICilMethod> GetMethods()
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{
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for (int idx = _il2CppType.FirstMethodIdx, end = _il2CppType.FirstMethodIdx + _il2CppType.MethodCount; idx < end; idx++)
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for (int i = 0; i < _il2CppType.MethodCount; i++)
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{
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yield return new Il2CppMethod(
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LibCpp2IlMain.TheMetadata!.methodDefs[idx]);
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LibCpp2IlMain.TheMetadata!.methodDefs[
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_il2CppType.FirstMethodIdx + i]);
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}
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}
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public IEnumerable<ICilType> GetNestedTypes()
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{
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for (int idx = _il2CppType.NestedTypesStart, end = _il2CppType.NestedTypesStart + _il2CppType.NestedTypeCount; idx < end; idx++)
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for (int i = 0; i < _il2CppType.NestedTypeCount; i++)
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{
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yield return GetOrCreate(
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LibCpp2IlMain.TheMetadata!.typeDefs[
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LibCpp2IlMain.TheMetadata.nestedTypeIndices[idx]]);
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LibCpp2IlMain.TheMetadata.nestedTypeIndices[
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_il2CppType.NestedTypesStart + i]]);
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}
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}
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public IEnumerable<ICilProperty> GetProperties()
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{
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for (int idx = _il2CppType.FirstPropertyId, end = _il2CppType.FirstPropertyId + _il2CppType.PropertyCount; idx < end; idx++)
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for (int i = 0; i < _il2CppType.PropertyCount; i++)
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{
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yield return new Il2CppProperty(
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LibCpp2IlMain.TheMetadata!.propertyDefs[idx],
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LibCpp2IlMain.TheMetadata!.propertyDefs[
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_il2CppType.FirstPropertyId + i],
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_il2CppType);
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}
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}
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|
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|
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@ -12,6 +12,7 @@ using System.Diagnostics.CodeAnalysis;
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using System.Linq;
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using SystemEx;
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using CommunityToolkit.Diagnostics;
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using LibCpp2IL;
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using LibProtodec.Models.Cil;
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using LibProtodec.Models.Protobuf;
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using LibProtodec.Models.Protobuf.Fields;
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||||
|
|
@ -572,7 +573,12 @@ public class ProtodecContext
|
|||
|
||||
protected string TranslateEnumFieldName(IEnumerable<ICilAttribute> attributes, string fieldName, string enumName)
|
||||
{
|
||||
//TODO: parse original name from first parameter of OriginalNameAttribute constructor
|
||||
if (LibCpp2IlMain.MetadataVersion >= 29f //TODO: do not merge into master until il2cpp-specific global is removed
|
||||
&& attributes.SingleOrDefault(static attr => attr.Type.Name == "OriginalNameAttribute")
|
||||
?.ConstructorArgumentValues[0] is string originalName)
|
||||
{
|
||||
return originalName;
|
||||
}
|
||||
|
||||
if (NameLookup?.Invoke(fieldName, out string? translatedName) == true)
|
||||
{
|
||||
|
|
@ -622,11 +628,10 @@ public class ProtodecContext
|
|||
protected static bool IsBeebyted(string name) =>
|
||||
name.Length == 11 && name.CountUpper() == 11;
|
||||
|
||||
protected static bool HasGeneratedCodeAttribute(IEnumerable<ICilAttribute> attributes, string tool)
|
||||
{
|
||||
return attributes.Any(attr => attr.Type.Name == nameof(GeneratedCodeAttribute));
|
||||
//TODO: ensure the first argument of the GeneratedCodeAttribute constructor == tool parameter
|
||||
}
|
||||
protected static bool HasGeneratedCodeAttribute(IEnumerable<ICilAttribute> attributes, string tool) =>
|
||||
attributes.Any(attr => attr.Type.Name == nameof(GeneratedCodeAttribute)
|
||||
&& (LibCpp2IlMain.MetadataVersion < 29f //TODO: do not merge into master until il2cpp-specific global is removed
|
||||
|| attr.ConstructorArgumentValues[0] as string == tool));
|
||||
|
||||
protected static bool HasNonUserCodeAttribute(IEnumerable<ICilAttribute> attributes) =>
|
||||
attributes.Any(static attr => attr.Type.Name == nameof(DebuggerNonUserCodeAttribute));
|
||||
|
|
|
|||
Loading…
Reference in New Issue