using dnlib.DotNet;
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using HybridCLR.Editor.Meta;
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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 System.Threading.Tasks;
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using UnityEngine;
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namespace HybridCLR.Editor.ABI
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{
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public class TypeCreator
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{
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private readonly Dictionary<TypeSig, TypeInfo> _typeInfoCache = new Dictionary<TypeSig, TypeInfo>(TypeEqualityComparer.Instance);
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private int _nextStructId = 0;
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public TypeInfo CreateTypeInfo(TypeSig type)
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{
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type = type.RemovePinnedAndModifiers();
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if (!_typeInfoCache.TryGetValue(type, out var typeInfo))
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{
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typeInfo = CreateTypeInfo0(type);
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_typeInfoCache.Add(type, typeInfo);
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}
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return typeInfo;
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}
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TypeInfo CreateTypeInfo0(TypeSig type)
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{
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type = type.RemovePinnedAndModifiers();
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if (type.IsByRef)
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{
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return TypeInfo.s_u;
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}
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switch (type.ElementType)
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{
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case ElementType.Void: return TypeInfo.s_void;
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case ElementType.Boolean: return TypeInfo.s_u1;
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case ElementType.I1: return TypeInfo.s_i1;
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case ElementType.U1: return TypeInfo.s_u1;
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case ElementType.I2: return TypeInfo.s_i2;
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case ElementType.Char:
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case ElementType.U2: return TypeInfo.s_u2;
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case ElementType.I4: return TypeInfo.s_i4;
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case ElementType.U4: return TypeInfo.s_u4;
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case ElementType.I8: return TypeInfo.s_i8;
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case ElementType.U8: return TypeInfo.s_u8;
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case ElementType.R4: return TypeInfo.s_r4;
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case ElementType.R8: return TypeInfo.s_r8;
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case ElementType.I: return TypeInfo.s_i;
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case ElementType.U:
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case ElementType.String:
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case ElementType.Ptr:
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case ElementType.ByRef:
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case ElementType.Class:
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case ElementType.Array:
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case ElementType.SZArray:
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case ElementType.FnPtr:
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case ElementType.Object:
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case ElementType.Module:
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case ElementType.Var:
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case ElementType.MVar:
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return TypeInfo.s_u;
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case ElementType.TypedByRef: return TypeInfo.s_typedByRef;
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case ElementType.ValueType:
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{
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TypeDef typeDef = type.ToTypeDefOrRef().ResolveTypeDef();
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if (typeDef == null)
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{
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throw new Exception($"type:{type} definition could not be found. Please try `HybridCLR/Genergate/LinkXml`, then Build once to generate the AOT dll, and then regenerate the bridge function");
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}
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if (typeDef.IsEnum)
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{
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return CreateTypeInfo(typeDef.GetEnumUnderlyingType());
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}
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return CreateValueType(type);
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}
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case ElementType.GenericInst:
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{
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GenericInstSig gis = (GenericInstSig)type;
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if (!gis.GenericType.IsValueType)
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{
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return TypeInfo.s_u;
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}
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TypeDef typeDef = gis.GenericType.ToTypeDefOrRef().ResolveTypeDef();
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if (typeDef.IsEnum)
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{
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return CreateTypeInfo(typeDef.GetEnumUnderlyingType());
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}
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return CreateValueType(type);
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}
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default: throw new NotSupportedException($"{type.ElementType}");
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}
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}
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protected TypeInfo CreateValueType(TypeSig type)
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{
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return new TypeInfo(ParamOrReturnType.STRUCT, type, _nextStructId++);
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}
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}
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}
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