first commit

Core/il2cpp/Helper/Il2CppHelper.cpp

@@ -0,0 +1,53 @@
+#include "pch.h"
+#include "Il2CppHelper.h"
+
+const uint8_t* Il2CppHelper::FindMethodInHierarchy(Il2CppClass* klass, const std::string &methodName, const std::vector<std::string> paramCount) {
+    const uint8_t* method = nullptr;
+
+    while (klass != nullptr) {
+        method = FindMethod(klass, methodName, paramCount);
+        if(method) break;
+
+        klass = Il2CppApi::ClassGetParent(klass);
+    }
+
+    return method;
+}
+
+
+const uint8_t* Il2CppHelper::FindMethod(Il2CppClass* klass, const std::string &name, const std::vector<std::string> &arg_types)
+{
+    Il2CppApi::ClassInit(klass);
+    void* iter = nullptr;
+
+    while (auto method = Il2CppApi::ClassGetMethods(klass, &iter)) {
+        auto methodName = Il2CppApi::MethodGetName(method);
+        if (methodName == name) {
+            auto paramCount = Il2CppApi::MethodGetParamCount(method);
+
+            if (paramCount == arg_types.size()) {
+                bool fail = false;
+                for (size_t i = 0; i < paramCount; ++i) {
+                    auto typeName = Il2CppApi::TypeGetName(Il2CppApi::MethodGetParam(method, i));
+
+                    if (arg_types[i] != typeName) {
+                        fail = true;
+                        break;
+                    }
+                }
+                if (!fail) {
+                    return method;
+                }
+            }
+        }
+    }
+
+    return nullptr;
+}
+
+uintptr_t* Il2CppHelper::GetFieldDataPtr(uintptr_t* field, Il2CppObject* object) {
+    size_t offset = Il2CppApi::FieldGetOffset(field);
+    uintptr_t* base_ptr = reinterpret_cast<uintptr_t*>(object);
+
+    return base_ptr + offset;
+}