Model: Groundwork for custom attribute processisng

Il2CppInspector/Il2CppModel.cs

@@ -31,8 +31,6 @@ namespace Il2CppInspector.Reflection
         // List of all methods ordered by their MethodDefinitionIndex
         public MethodBase[] MethodsByDefinitionIndex { get; }
 
-        // List of all types 
-
         public Il2CppModel(Il2CppInspector package) {
             Package = package;
             TypesByDefinitionIndex = new TypeInfo[package.TypeDefinitions.Length];
@@ -108,5 +106,19 @@ namespace Il2CppInspector.Reflection
             TypesByVirtualAddress.Add(ptr, newUsage);
             return newUsage;
         }
+
+        // Attribute management
+        private int getCustomAttributeIndex(Assembly asm, uint token, int customAttributeIndex) {
+            var image = asm.Definition;
+
+            throw new NotImplementedException();
+        }
+
+        public int GetCustomAttributeIndex(Assembly asm) => getCustomAttributeIndex(asm, asm.Definition.token, -1);
+        public int GetCustomAttributeIndex(EventInfo evt) => getCustomAttributeIndex(evt.Assembly, evt.Definition.token, evt.Definition.customAttributeIndex);
+        public int GetCustomAttributeIndex(FieldInfo field) => getCustomAttributeIndex(field.Assembly, field.Definition.token, field.Definition.customAttributeIndex);
+        public int GetCustomAttributeIndex(MethodBase method) => getCustomAttributeIndex(method.Assembly, method.Definition.token, method.Definition.customAttributeIndex);
+        public int GetCustomAttributeIndex(ParameterInfo param) => getCustomAttributeIndex(param.Member.Assembly, param.Definition.token, param.Definition.customAttributeIndex);
+        public int GetCustomAttributeIndex(PropertyInfo prop) => getCustomAttributeIndex(prop.Assembly, prop.Definition.token, prop.Definition.customAttributeIndex);
     }
 }

Il2CppInspector/Metadata.cs

@@ -28,9 +28,11 @@ namespace Il2CppInspector
         public Il2CppEventDefinition[] Events { get; }
         public Il2CppGenericContainer[] GenericContainers { get; }
         public Il2CppGenericParameter[] GenericParameters { get; }
+        public Il2CppCustomAttributeTypeRange[] AttributeTypeRanges { get; }
 
         public int[] InterfaceUsageIndices { get; }
         public int[] NestedTypeIndices { get; }
+        public int[] AttributeRangeIndices { get; }
 
         public Dictionary<int, string> Strings { get; } = new Dictionary<int, string>();
 
@@ -102,7 +104,12 @@ namespace Il2CppInspector
             NestedTypeIndices = ReadArray<int>(Header.nestedTypesOffset, Header.nestedTypesCount / sizeof(int));
             GenericContainers = ReadArray<Il2CppGenericContainer>(Header.genericContainersOffset, Header.genericContainersCount / Sizeof(typeof(Il2CppGenericContainer)));
             GenericParameters = ReadArray<Il2CppGenericParameter>(Header.genericParametersOffset, Header.genericParametersCount / Sizeof(typeof(Il2CppGenericParameter)));
-            // TODO: ParameterDefaultValue, ParameterConstraints, MetadataUsage, CustomAttributes
+
+            if (Version >= 21) {
+                AttributeRangeIndices = ReadArray<int>(Header.attributeTypesOffset, Header.attributeTypesCount / sizeof(int));
+                AttributeTypeRanges = ReadArray<Il2CppCustomAttributeTypeRange>(Header.attributesInfoOffset, Header.attributesInfoCount / Sizeof(typeof(Il2CppCustomAttributeTypeRange)));
+            }
+            // TODO: ParameterDefaultValue, ParameterConstraints, MetadataUsage
 
             // Get all string literals
             Position = Header.stringOffset;

Il2CppInspector/MetadataClasses.cs

@@ -322,4 +322,13 @@ namespace Il2CppInspector
         public ushort num;
         public ushort flags;
     }
+
+    public class Il2CppCustomAttributeTypeRange
+    {
+        [Version(Min = 24.1)]
+        public uint token;
+
+        public int start;
+        public int count;
+    }
 }

Il2CppInspector/Reflection/CustomAttributeData.cs

@@ -6,8 +6,10 @@
 
 namespace Il2CppInspector.Reflection
 {
+    // See: https://docs.microsoft.com/en-us/dotnet/api/system.reflection.customattributedata?view=netframework-4.8
+
     public class CustomAttributeData
     {
-        // TODO
+        // TODO: CustomAttributeData
     }
 }