managed_object.h

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#pragma once
#include <Windows.h>
using namespace System;
using namespace System::Runtime::InteropServices;
 
namespace DaoAI
{
 namespace DeepLearningCLI
 {
 // Adapted from ChatGPT
 static const char* string_to_char_array(String^ string)
 {
 if (string == nullptr) return nullptr; // Handle null input
 
 // Convert managed String^ to unmanaged UTF-16 memory
 IntPtr ptr = Marshal::StringToHGlobalAuto(string);
 if (ptr == IntPtr::Zero) return nullptr;
 
 const wchar_t* wideStr = static_cast<const wchar_t*>(ptr.ToPointer());
 
 // Ensure string is not empty
 if (*wideStr == L'\0')
 {
 Marshal::FreeHGlobal(ptr);
 return nullptr;
 }
 
 // Determine the required buffer size for UTF-8 conversion
 int sizeNeeded = WideCharToMultiByte(CP_UTF8, 0, wideStr, -1, nullptr, 0, nullptr, nullptr);
 if (sizeNeeded <= 0)
 {
 Marshal::FreeHGlobal(ptr);
 return nullptr;
 }
 
 // Allocate memory for UTF-8 string
 char* utf8Str = new char[sizeNeeded];
 if (!utf8Str)
 {
 Marshal::FreeHGlobal(ptr);
 return nullptr;
 }
 
 // Convert UTF-16 to UTF-8
 if (WideCharToMultiByte(CP_UTF8, 0, wideStr, -1, utf8Str, sizeNeeded, nullptr, nullptr) == 0)
 {
 delete[] utf8Str;
 Marshal::FreeHGlobal(ptr);
 return nullptr;
 }
 
 // Free the unmanaged UTF-16 memory
 Marshal::FreeHGlobal(ptr);
 
 return utf8Str; // Caller must free this memory
 }
 
 template<class T>
 public ref class ManagedObject
 {
 protected:
 T* m_Instance;
 public:
 ManagedObject(T* instance)
 : m_Instance(instance)
 {
 }
 ManagedObject()
 : m_Instance(nullptr)
 {
 }
 virtual ~ManagedObject()
 {
 if (m_Instance != nullptr)
 {
 delete m_Instance;
 }
 }
 !ManagedObject()
 {
 if (m_Instance != nullptr)
 {
 delete m_Instance;
 }
 }
 T* GetInstance()
 {
 return m_Instance;
 }
 };
 }
}