Adiciona funções em misc.hpp

includes/misc.hpp

@@ -1,16 +1,85 @@
 #ifndef MISC_HPP
 #define MISC_HPP
 
+//MISC.HPP is a header with useful functions and classes.
+
 #include <memory>
 #include <utility>
+#include <string>
+#include <stdexcept>
+#include <source_location>
 
 namespace misc {
-	//Realiza um std::make_shared<TDERIVED> e converte para classe base com reinterpret_pointer_cast<TBASE>
+	//Performs a std::make_shared<TDERIVED> and converts to base class with reinterpret_pointer_cast<TBASE>
 	template <typename TBASE, typename TDERIVED, class... _Types>
 	std::shared_ptr<TBASE> reinterpret_make_shared(_Types&&... _Args) {
 		auto derived = std::make_shared<TDERIVED>(std::forward<_Types>(_Args)...);
 		return reinterpret_pointer_cast<TBASE>(derived);
 	}
+
+	//
+	// Smart Pointer Comparator
+	//
+
+	template<typename T> struct is_shared_ptr : std::false_type {};
+	template<typename T> struct is_shared_ptr<std::shared_ptr<T>> : std::true_type {};
+	template<typename T> struct is_weak_ptr : std::false_type {};
+	template<typename T> struct is_weak_ptr<std::weak_ptr<T>> : std::true_type {};
+	template<typename T> struct is_unique_ptr : std::false_type {};
+	template<typename T> struct is_unique_ptr<std::unique_ptr<T>> : std::true_type {};
+
+	//Returns true if the type is a smart pointer
+	template <typename T>
+	static constexpr bool IsSmartPointer() {
+		return is_shared_ptr<T>::value || is_unique_ptr<T>::value || is_weak_ptr<T>::value;
+	}
+
+	//Convert a string to wstring
+	static inline std::wstring ToWString(const std::string& str)
+	{
+		std::wstring wstr;
+		size_t size;
+		wstr.resize(str.length());
+		mbstowcs_s(&size, &wstr[0], wstr.size() + 1, str.c_str(), str.size());
+		return wstr;
+	}
+
+	//Convert a wstring to string
+	static inline std::string ToString(const std::wstring& wstr)
+	{
+		std::string str;
+		size_t size;
+		str.resize(wstr.length());
+		wcstombs_s(&size, &str[0], str.size() + 1, wstr.c_str(), wstr.size());
+		return str;
+	}
+
+	//Returns a hash reporting input values
+	template <class T>
+	static constexpr void HashCombine(std::size_t& seed, const T& v) {
+		std::hash<T> hasher;
+		seed ^= hasher(v) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
+	}	
+
+#define SOURCE_LOCATION std::source_location const& location = std::source_location::current()
+
+	//Returns null if the type is a smart pointer or default value if the type has a default constructor.
+	//Throws an exception if the object cannot be created
+	template<typename T>
+	static inline auto ReturnDefaultOrNull(SOURCE_LOCATION) {
+		if constexpr (IsSmartPointer<T>() || std::is_pointer<T>::value)
+			return (T)nullptr;
+		else if constexpr (std::is_default_constructible<T>::value)
+			return T();
+		else {
+			std::string error;
+			error.append("Could not return null or default value.");
+			error.append("In ");
+			error.append(location.function_name);
+			
+			throw std::runtime_error(error);
+		}		
+	}
 }
 
 #endif