From 30e280b694a2706248a8bfe8d2dd683ff7296c93 Mon Sep 17 00:00:00 2001
From: sfan5 <sfan5@live.de>
Date: Sat, 6 Apr 2024 12:42:44 +0200
Subject: [PATCH] Use MT's string conversion inside Irrlicht

---
 irr/include/irrString.h | 13 ++++++++-----
 irr/src/CMakeLists.txt  |  2 --
 2 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/irr/include/irrString.h b/irr/include/irrString.h
index 5bf604e49..a583c9e4b 100644
--- a/irr/include/irrString.h
+++ b/irr/include/irrString.h
@@ -6,13 +6,18 @@
 
 #include "irrTypes.h"
 #include <string>
+#include <string_view>
 #include <algorithm>
 #include <cstdio>
 #include <cstring>
 #include <cwchar>
-#include <codecvt>
 #include <locale>
 
+/* HACK: import these string methods from MT's util/string.h */
+extern std::wstring utf8_to_wide(std::string_view input);
+extern std::string wide_to_utf8(std::wstring_view input);
+/* */
+
 namespace irr
 {
 namespace core
@@ -905,8 +910,7 @@ inline size_t multibyteToWString(stringw &destination, const core::stringc &sour
 
 inline size_t utf8ToWString(stringw &destination, const char *source)
 {
-	std::wstring_convert<std::codecvt_utf8<wchar_t>> conv;
-	destination = conv.from_bytes(source);
+	destination = utf8_to_wide(source);
 	return destination.size();
 }
 
@@ -917,8 +921,7 @@ inline size_t utf8ToWString(stringw &destination, const stringc &source)
 
 inline size_t wStringToUTF8(stringc &destination, const wchar_t *source)
 {
-	std::wstring_convert<std::codecvt_utf8<wchar_t>> conv;
-	destination = conv.to_bytes(source);
+	destination = wide_to_utf8(source);
 	return destination.size();
 }
 
diff --git a/irr/src/CMakeLists.txt b/irr/src/CMakeLists.txt
index 670a755fe..10a841669 100644
--- a/irr/src/CMakeLists.txt
+++ b/irr/src/CMakeLists.txt
@@ -38,8 +38,6 @@ elseif(MSVC)
 	if(CMAKE_SIZEOF_VOID_P EQUAL 4)
 		add_compile_options(/arch:SSE)
 	endif()
-
-	add_compile_options(/D_SILENCE_CXX17_CODECVT_HEADER_DEPRECATION_WARNING)
 endif()
 
 # Platform-independent configuration (hard-coded currently)