Use UTF-8 instead of narrow

Use wide_to_utf8 and utf8_to_wide instead of wide_to_narrow and narrow_to_wide at almost all places.
Only exceptions: test functions for narrow conversion, and chat, which is done in a separate commit.

src/client/clientlauncher.cpp

@@ -183,7 +183,7 @@ bool ClientLauncher::run(GameParams &game_params, const Settings &cmd_args)
 	{
 		// Set the window caption
 		const wchar_t *text = wgettext("Main Menu");
-		device->setWindowCaption((narrow_to_wide(PROJECT_NAME_C) + L" [" + text + L"]").c_str());
+		device->setWindowCaption((utf8_to_wide(PROJECT_NAME_C) + L" [" + text + L"]").c_str());
 		delete[] text;
 
 		try {	// This is used for catching disconnects

src/content_cao.cpp

@@ -970,7 +970,7 @@ void GenericCAO::addToScene(scene::ISceneManager *smgr, ITextureSource *tsrc,
 	if (node && m_is_player && !m_is_local_player) {
 		// Add a text node for showing the name
 		gui::IGUIEnvironment* gui = irr->getGUIEnvironment();
-		std::wstring wname = narrow_to_wide(m_name);
+		std::wstring wname = utf8_to_wide(m_name);
 		m_textnode = smgr->addTextSceneNode(gui->getSkin()->getFont(),
 				wname.c_str(), m_nametag_color, node);
 		m_textnode->grab();

src/fontengine.h

@@ -59,7 +59,7 @@ public:
 			unsigned int font_size=FONT_SIZE_UNSPECIFIED,
 			FontMode mode=FM_Unspecified)
 	{
-		return getTextWidth(narrow_to_wide(text));
+		return getTextWidth(utf8_to_wide(text));
 	}
 
 	/** get text width if a text for a specific font */

src/game.cpp

@@ -85,7 +85,7 @@ struct TextDestNodeMetadata : public TextDest {
 	// This is deprecated I guess? -celeron55
 	void gotText(std::wstring text)
 	{
-		std::string ntext = wide_to_narrow(text);
+		std::string ntext = wide_to_utf8(text);
 		infostream << "Submitting 'text' field of node at (" << m_p.X << ","
 			   << m_p.Y << "," << m_p.Z << "): " << ntext << std::endl;
 		StringMap fields;
@@ -183,7 +183,7 @@ struct LocalFormspecHandler : public TextDest {
 					(fields.find("quit") != fields.end())) {
 				StringMap::const_iterator it = fields.find("f_text");
 				if (it != fields.end())
-					m_client->typeChatMessage(narrow_to_wide(it->second));
+					m_client->typeChatMessage(utf8_to_wide(it->second));
 
 				return;
 			}
@@ -445,7 +445,7 @@ void update_profiler_gui(gui::IGUIStaticText *guitext_profiler, FontEngine *fe,
 
 		std::ostringstream os(std::ios_base::binary);
 		g_profiler->printPage(os, show_profiler, show_profiler_max);
-		std::wstring text = narrow_to_wide(os.str());
+		std::wstring text = utf8_to_wide(os.str());
 		guitext_profiler->setText(text.c_str());
 		guitext_profiler->setVisible(true);
 
@@ -582,16 +582,16 @@ public:
 			s32 texth = 15;
 			char buf[10];
 			snprintf(buf, 10, "%.3g", show_max);
-			font->draw(narrow_to_wide(buf).c_str(),
+			font->draw(utf8_to_wide(buf).c_str(),
 					core::rect<s32>(textx, y - graphh,
 						   textx2, y - graphh + texth),
 					meta.color);
 			snprintf(buf, 10, "%.3g", show_min);
-			font->draw(narrow_to_wide(buf).c_str(),
+			font->draw(utf8_to_wide(buf).c_str(),
 					core::rect<s32>(textx, y - texth,
 						   textx2, y),
 					meta.color);
-			font->draw(narrow_to_wide(id).c_str(),
+			font->draw(utf8_to_wide(id).c_str(),
 					core::rect<s32>(textx, y - graphh / 2 - texth / 2,
 						   textx2, y - graphh / 2 + texth / 2),
 					meta.color);
@@ -1049,7 +1049,7 @@ static void show_chat_menu(GUIFormSpecMenu **cur_formspec,
 		FORMSPEC_VERSION_STRING
 		SIZE_TAG
 		"field[3,2.35;6,0.5;f_text;;" + text + "]"
-		"button_exit[4,3;3,0.5;btn_send;" + wide_to_narrow(wstrgettext("Proceed")) + "]"
+		"button_exit[4,3;3,0.5;btn_send;" + wide_to_utf8(wstrgettext("Proceed")) + "]"
 		;
 
 	/* Create menu */
@@ -1089,7 +1089,7 @@ static void show_pause_menu(GUIFormSpecMenu **cur_formspec,
 		bool singleplayermode)
 {
 #ifdef __ANDROID__
-	std::string control_text = wide_to_narrow(wstrgettext("Default Controls:\n"
+	std::string control_text = wide_to_utf8(wstrgettext("Default Controls:\n"
 				   "No menu visible:\n"
 				   "- single tap: button activate\n"
 				   "- double tap: place/use\n"
@@ -1103,7 +1103,7 @@ static void show_pause_menu(GUIFormSpecMenu **cur_formspec,
 				   " --> place single item to slot\n"
 							     ));
 #else
-	std::string control_text = wide_to_narrow(wstrgettext("Default Controls:\n"
+	std::string control_text = wide_to_utf8(wstrgettext("Default Controls:\n"
 				   "- WASD: move\n"
 				   "- Space: jump/climb\n"
 				   "- Shift: sneak/go down\n"
@@ -1122,23 +1122,23 @@ static void show_pause_menu(GUIFormSpecMenu **cur_formspec,
 
 	os << FORMSPEC_VERSION_STRING  << SIZE_TAG
 	   << "button_exit[4," << (ypos++) << ";3,0.5;btn_continue;"
-	   << wide_to_narrow(wstrgettext("Continue"))     << "]";
+	   << wide_to_utf8(wstrgettext("Continue"))     << "]";
 
 	if (!singleplayermode) {
 		os << "button_exit[4," << (ypos++) << ";3,0.5;btn_change_password;"
-		   << wide_to_narrow(wstrgettext("Change Password")) << "]";
+		   << wide_to_utf8(wstrgettext("Change Password")) << "]";
 	}
 
 #ifndef __ANDROID__
 	os		<< "button_exit[4," << (ypos++) << ";3,0.5;btn_sound;"
-			<< wide_to_narrow(wstrgettext("Sound Volume")) << "]";
+			<< wide_to_utf8(wstrgettext("Sound Volume")) << "]";
 	os		<< "button_exit[4," << (ypos++) << ";3,0.5;btn_key_config;"
-			<< wide_to_narrow(wstrgettext("Change Keys"))  << "]";
+			<< wide_to_utf8(wstrgettext("Change Keys"))  << "]";
 #endif
 	os		<< "button_exit[4," << (ypos++) << ";3,0.5;btn_exit_menu;"
-			<< wide_to_narrow(wstrgettext("Exit to Menu")) << "]";
+			<< wide_to_utf8(wstrgettext("Exit to Menu")) << "]";
 	os		<< "button_exit[4," << (ypos++) << ";3,0.5;btn_exit_os;"
-			<< wide_to_narrow(wstrgettext("Exit to OS"))   << "]"
+			<< wide_to_utf8(wstrgettext("Exit to OS"))   << "]"
 			<< "textarea[7.5,0.25;3.9,6.25;;" << control_text << ";]"
 			<< "textarea[0.4,0.25;3.5,6;;" << PROJECT_NAME_C "\n"
 			<< g_build_info << "\n"
@@ -1167,7 +1167,7 @@ static void updateChat(Client &client, f32 dtime, bool show_debug,
 
 	// Get new messages from error log buffer
 	while (!chat_log_error_buf.empty()) {
-		chat_backend.addMessage(L"", narrow_to_wide(chat_log_error_buf.get()));
+		chat_backend.addMessage(L"", utf8_to_wide(chat_log_error_buf.get()));
 	}
 
 	// Get new messages from client
@@ -2059,7 +2059,7 @@ bool Game::createClient(const std::string &playername,
 
 	/* Set window caption
 	 */
-	std::wstring str = narrow_to_wide(PROJECT_NAME_C);
+	std::wstring str = utf8_to_wide(PROJECT_NAME_C);
 	str += L" [";
 	str += driver->getName();
 	str += L"]";
@@ -2087,7 +2087,7 @@ bool Game::initGui()
 {
 	// First line of debug text
 	guitext = guienv->addStaticText(
-			narrow_to_wide(PROJECT_NAME_C).c_str(),
+			utf8_to_wide(PROJECT_NAME_C).c_str(),
 			core::rect<s32>(0, 0, 0, 0),
 			false, false, guiroot);
 
@@ -2342,7 +2342,7 @@ bool Game::getServerContent(bool *aborted)
 			}
 
 			progress = 30 + client->mediaReceiveProgress() * 35 + 0.5;
-			draw_load_screen(narrow_to_wide(message.str()), device,
+			draw_load_screen(utf8_to_wide(message.str()), device,
 					guienv, dtime, progress);
 		}
 	}
@@ -2660,7 +2660,7 @@ void Game::processKeyboardInput(VolatileRunFlags *flags,
 
 	if (quicktune->hasMessage()) {
 		std::string msg = quicktune->getMessage();
-		statustext = narrow_to_wide(msg);
+		statustext = utf8_to_wide(msg);
 		*statustext_time = 0;
 	}
 }
@@ -2947,7 +2947,7 @@ void Game::increaseViewRange(float *statustext_time)
 	s16 range = g_settings->getS16("viewing_range_nodes_min");
 	s16 range_new = range + 10;
 	g_settings->set("viewing_range_nodes_min", itos(range_new));
-	statustext = narrow_to_wide("Minimum viewing range changed to "
+	statustext = utf8_to_wide("Minimum viewing range changed to "
 			+ itos(range_new));
 	*statustext_time = 0;
 }
@@ -2962,7 +2962,7 @@ void Game::decreaseViewRange(float *statustext_time)
 		range_new = range;
 
 	g_settings->set("viewing_range_nodes_min", itos(range_new));
-	statustext = narrow_to_wide("Minimum viewing range changed to "
+	statustext = utf8_to_wide("Minimum viewing range changed to "
 			+ itos(range_new));
 	*statustext_time = 0;
 }
@@ -3577,13 +3577,13 @@ void Game::handlePointingAtNode(GameRunData *runData,
 	NodeMetadata *meta = map.getNodeMetadata(nodepos);
 
 	if (meta) {
-		infotext = narrow_to_wide(meta->getString("infotext"));
+		infotext = utf8_to_wide(meta->getString("infotext"));
 	} else {
 		MapNode n = map.getNodeNoEx(nodepos);
 
 		if (nodedef_manager->get(n).tiledef[0].name == "unknown_node.png") {
 			infotext = L"Unknown node: ";
-			infotext += narrow_to_wide(nodedef_manager->get(n).name);
+			infotext += utf8_to_wide(nodedef_manager->get(n).name);
 		}
 	}
 
@@ -3649,10 +3649,10 @@ void Game::handlePointingAtObject(GameRunData *runData,
 		const v3f &player_position,
 		bool show_debug)
 {
-	infotext = narrow_to_wide(runData->selected_object->infoText());
+	infotext = utf8_to_wide(runData->selected_object->infoText());
 
 	if (infotext == L"" && show_debug) {
-		infotext = narrow_to_wide(runData->selected_object->debugInfoText());
+		infotext = utf8_to_wide(runData->selected_object->debugInfoText());
 	}
 
 	if (input->getLeftState()) {
@@ -4117,12 +4117,12 @@ void Game::updateGui(float *statustext_time, const RunStats &stats,
 		   << ", v_range = " << draw_control->wanted_range
 		   << std::setprecision(3)
 		   << ", RTT = " << client->getRTT();
-		guitext->setText(narrow_to_wide(os.str()).c_str());
+		guitext->setText(utf8_to_wide(os.str()).c_str());
 		guitext->setVisible(true);
 	} else if (flags.show_hud || flags.show_chat) {
 		std::ostringstream os(std::ios_base::binary);
 		os << PROJECT_NAME_C " " << g_version_hash;
-		guitext->setText(narrow_to_wide(os.str()).c_str());
+		guitext->setText(utf8_to_wide(os.str()).c_str());
 		guitext->setVisible(true);
 	} else {
 		guitext->setVisible(false);
@@ -4159,7 +4159,7 @@ void Game::updateGui(float *statustext_time, const RunStats &stats,
 			}
 		}
 
-		guitext2->setText(narrow_to_wide(os.str()).c_str());
+		guitext2->setText(utf8_to_wide(os.str()).c_str());
 		guitext2->setVisible(true);
 
 		core::rect<s32> rect(

src/gettext.cpp

@@ -102,8 +102,9 @@ const char* MSVC_LocaleLookup(const char* raw_shortname) {
 
 	last_raw_value = shortname;
 
-	if (glb_supported_locales.find(narrow_to_wide(shortname)) != glb_supported_locales.end()) {
+	if (glb_supported_locales.find(utf8_to_wide(shortname)) != glb_supported_locales.end()) {
-		last_full_name = wide_to_narrow(glb_supported_locales[narrow_to_wide(shortname)]);
+		last_full_name = wide_to_utf8(
+			glb_supported_locales[utf8_to_wide(shortname)]);
 		return last_full_name.c_str();
 	}
 

src/gettext.h

@@ -39,13 +39,13 @@ void init_gettext(const char *path, const std::string &configured_language,
 void init_gettext(const char *path, const std::string &configured_language);
 #endif
 
-extern wchar_t *narrow_to_wide_c(const char *str);
+extern wchar_t *utf8_to_wide_c(const char *str);
 
 // You must free the returned string!
 // The returned string is allocated using new
 inline const wchar_t *wgettext(const char *str)
 {
-	return narrow_to_wide_c(gettext(str));
+	return utf8_to_wide_c(gettext(str));
 }
 
 inline std::wstring wstrgettext(const std::string &text)

src/guiEngine.cpp

@@ -61,7 +61,7 @@ void TextDestGuiEngine::gotText(const StringMap &fields)
 /******************************************************************************/
 void TextDestGuiEngine::gotText(std::wstring text)
 {
-	m_engine->getScriptIface()->handleMainMenuEvent(wide_to_narrow(text));
+	m_engine->getScriptIface()->handleMainMenuEvent(wide_to_utf8(text));
 }
 
 /******************************************************************************/
@@ -172,7 +172,7 @@ GUIEngine::GUIEngine(	irr::IrrlichtDevice* dev,
 		m_sound_manager = &dummySoundManager;
 
 	//create topleft header
-	std::wstring t = narrow_to_wide(std::string(PROJECT_NAME_C " ") +
+	std::wstring t = utf8_to_wide(std::string(PROJECT_NAME_C " ") +
 			g_version_hash);
 
 	core::rect<s32> rect(0, 0, g_fontengine->getTextWidth(t), g_fontengine->getTextHeight());
@@ -572,13 +572,13 @@ bool GUIEngine::downloadFile(std::string url, std::string target)
 /******************************************************************************/
 void GUIEngine::setTopleftText(std::string append)
 {
-	std::wstring toset = narrow_to_wide(std::string(PROJECT_NAME_C " ") +
+	std::wstring toset = utf8_to_wide(std::string(PROJECT_NAME_C " ") +
-			g_version_hash);
+		g_version_hash);
 
 	if (append != "")
 	{
 		toset += L" / ";
-		toset += narrow_to_wide(append);
+		toset += utf8_to_wide(append);
 	}
 
 	m_irr_toplefttext->setText(toset.c_str());

src/guiFileSelectMenu.cpp

@@ -26,7 +26,7 @@ GUIFileSelectMenu::GUIFileSelectMenu(gui::IGUIEnvironment* env,
 				std::string title, std::string formname) :
 GUIModalMenu(env, parent, id, menumgr)
 {
-	m_title = narrow_to_wide(title);
+	m_title = utf8_to_wide(title);
 	m_parent = parent;
 	m_formname = formname;
 	m_text_dst = 0;
@@ -87,7 +87,7 @@ void GUIFileSelectMenu::acceptInput() {
 		StringMap fields;
 
 		if (m_accepted)
-			fields[m_formname + "_accepted"] = wide_to_narrow(m_fileOpenDialog->getFileName());
+			fields[m_formname + "_accepted"] = wide_to_utf8(m_fileOpenDialog->getFileName());
 		else
 			fields[m_formname + "_canceled"] = m_formname;
 

src/guiPasswordChange.cpp

@@ -203,8 +203,8 @@ bool GUIPasswordChange::acceptInput()
 				e->setVisible(true);
 			return false;
 		}
-		m_client->sendChangePassword(wide_to_narrow(oldpass),
+		m_client->sendChangePassword(wide_to_utf8(oldpass),
-			wide_to_narrow(newpass));
+			wide_to_utf8(newpass));
 		return true;
 }
 

src/guiTable.cpp

@@ -929,7 +929,7 @@ s32 GUITable::allocString(const std::string &text)
 	std::map<std::string, s32>::iterator it = m_alloc_strings.find(text);
 	if (it == m_alloc_strings.end()) {
 		s32 id = m_strings.size();
-		std::wstring wtext = narrow_to_wide(text);
+		std::wstring wtext = utf8_to_wide(text);
 		m_strings.push_back(core::stringw(wtext.c_str()));
 		m_alloc_strings.insert(std::make_pair(text, id));
 		return id;

src/hud.cpp

@@ -275,7 +275,7 @@ void Hud::drawLuaElements(v3s16 camera_offset) {
 										 (e->number >> 8)  & 0xFF,
 										 (e->number >> 0)  & 0xFF);
 				core::rect<s32> size(0, 0, e->scale.X, text_height * e->scale.Y);
-				std::wstring text = narrow_to_wide(e->text);
+				std::wstring text = utf8_to_wide(e->text);
 				core::dimension2d<u32> textsize = font->getDimension(text.c_str());
 				v2s32 offset((e->align.X - 1.0) * (textsize.Width / 2),
 				             (e->align.Y - 1.0) * (textsize.Height / 2));
@@ -310,11 +310,11 @@ void Hud::drawLuaElements(v3s16 camera_offset) {
 										 (e->number >> 8)  & 0xFF,
 										 (e->number >> 0)  & 0xFF);
 				core::rect<s32> size(0, 0, 200, 2 * text_height);
-				std::wstring text = narrow_to_wide(e->name);
+				std::wstring text = utf8_to_wide(e->name);
 				font->draw(text.c_str(), size + pos, color);
 				std::ostringstream os;
-				os<<distance<<e->text;
+				os << distance << e->text;
-				text = narrow_to_wide(os.str());
+				text = utf8_to_wide(os.str());
 				pos.Y += text_height;
 				font->draw(text.c_str(), size + pos, color);
 				break; }
@@ -552,7 +552,7 @@ void drawItemStack(video::IVideoDriver *driver,
 	{
 		// Get the item count as a string
 		std::string text = itos(item.count);
-		v2u32 dim = font->getDimension(narrow_to_wide(text).c_str());
+		v2u32 dim = font->getDimension(utf8_to_wide(text).c_str());
 		v2s32 sdim(dim.X,dim.Y);
 
 		core::rect<s32> rect2(

src/network/clientpackethandler.cpp

@@ -228,7 +228,7 @@ void Client::handleCommand_AccessDenied(NetworkPacket* pkt)
 		if (pkt->getSize() >= 2) {
 			std::wstring wide_reason;
 			*pkt >> wide_reason;
-			m_access_denied_reason = wide_to_narrow(wide_reason);
+			m_access_denied_reason = wide_to_utf8(wide_reason);
 		}
 	}
 }

src/network/serverpackethandler.cpp

@@ -356,7 +356,7 @@ void Server::handleCommand_Init_Legacy(NetworkPacket* pkt)
 		DenyAccess_Legacy(pkt->getPeerId(), std::wstring(
 				L"Your client's version is not supported.\n"
 				L"Server version is ")
-				+ narrow_to_wide(g_version_string) + L"."
+				+ utf8_to_wide(g_version_string) + L"."
 		);
 		return;
 	}
@@ -408,15 +408,15 @@ void Server::handleCommand_Init_Legacy(NetworkPacket* pkt)
 		DenyAccess_Legacy(pkt->getPeerId(), std::wstring(
 				L"Your client's version is not supported.\n"
 				L"Server version is ")
-				+ narrow_to_wide(g_version_string) + L",\n"
+				+ utf8_to_wide(g_version_string) + L",\n"
 				+ L"server's PROTOCOL_VERSION is "
-				+ narrow_to_wide(itos(SERVER_PROTOCOL_VERSION_MIN))
+				+ utf8_to_wide(itos(SERVER_PROTOCOL_VERSION_MIN))
 				+ L"..."
-				+ narrow_to_wide(itos(SERVER_PROTOCOL_VERSION_MAX))
+				+ utf8_to_wide(itos(SERVER_PROTOCOL_VERSION_MAX))
 				+ L", client's PROTOCOL_VERSION is "
-				+ narrow_to_wide(itos(min_net_proto_version))
+				+ utf8_to_wide(itos(min_net_proto_version))
 				+ L"..."
-				+ narrow_to_wide(itos(max_net_proto_version))
+				+ utf8_to_wide(itos(max_net_proto_version))
 		);
 		return;
 	}
@@ -428,13 +428,13 @@ void Server::handleCommand_Init_Legacy(NetworkPacket* pkt)
 			DenyAccess_Legacy(pkt->getPeerId(), std::wstring(
 					L"Your client's version is not supported.\n"
 					L"Server version is ")
-					+ narrow_to_wide(g_version_string) + L",\n"
+					+ utf8_to_wide(g_version_string) + L",\n"
 					+ L"server's PROTOCOL_VERSION (strict) is "
-					+ narrow_to_wide(itos(LATEST_PROTOCOL_VERSION))
+					+ utf8_to_wide(itos(LATEST_PROTOCOL_VERSION))
 					+ L", client's PROTOCOL_VERSION is "
-					+ narrow_to_wide(itos(min_net_proto_version))
+					+ utf8_to_wide(itos(min_net_proto_version))
 					+ L"..."
-					+ narrow_to_wide(itos(max_net_proto_version))
+					+ utf8_to_wide(itos(max_net_proto_version))
 			);
 			return;
 		}
@@ -487,7 +487,7 @@ void Server::handleCommand_Init_Legacy(NetworkPacket* pkt)
 					<< "tried to connect from " << addr_s << " "
 					<< "but it was disallowed for the following reason: "
 					<< reason << std::endl;
-			DenyAccess_Legacy(pkt->getPeerId(), narrow_to_wide(reason.c_str()));
+			DenyAccess_Legacy(pkt->getPeerId(), utf8_to_wide(reason.c_str()));
 			return;
 		}
 	}

src/script/lua_api/l_mainmenu.cpp

@@ -1057,7 +1057,7 @@ int ModApiMainMenu::l_get_video_modes(lua_State *L)
 int ModApiMainMenu::l_gettext(lua_State *L)
 {
 	std::wstring wtext = wstrgettext((std::string) luaL_checkstring(L, 1));
-	lua_pushstring(L, wide_to_narrow(wtext).c_str());
+	lua_pushstring(L, wide_to_utf8(wtext).c_str());
 
 	return 1;
 }

src/script/lua_api/l_server.cpp

@@ -307,7 +307,7 @@ int ModApiServer::l_kick_player(lua_State *L)
 		lua_pushboolean(L, false); // No such player
 		return 1;
 	}
-	getServer(L)->DenyAccess_Legacy(player->peer_id, narrow_to_wide(message));
+	getServer(L)->DenyAccess_Legacy(player->peer_id, utf8_to_wide(message));
 	lua_pushboolean(L, true);
 	return 1;
 }

src/server.cpp

@@ -1183,7 +1183,7 @@ void Server::ProcessData(NetworkPacket *pkt)
 					<< ban_name << std::endl;
 			// This actually doesn't seem to transfer to the client
 			DenyAccess_Legacy(peer_id, L"Your ip is banned. Banned name was "
-					+ narrow_to_wide(ban_name));
+					+ utf8_to_wide(ban_name));
 			return;
 		}
 	}

src/unittest/test_serialization.cpp

@@ -102,7 +102,7 @@ void TestSerialization::testSerializeWideString()
 	UASSERT(serializeWideString(L"") == mkstr("\0\0"));
 
 	// Test basic string
-	UASSERT(serializeWideString(narrow_to_wide("Hello world!")) ==
+	UASSERT(serializeWideString(utf8_to_wide("Hello world!")) ==
 		mkstr("\0\14\0H\0e\0l\0l\0o\0 \0w\0o\0r\0l\0d\0!"));
 
 	// Test character range

src/util/string.cpp

@@ -168,6 +168,16 @@ std::string wide_to_utf8(const std::wstring &input)
 
 #endif // _WIN32
 
+wchar_t *utf8_to_wide_c(const char *str)
+{
+	std::wstring ret = utf8_to_wide(std::string(str)).c_str();
+	size_t len = ret.length();
+	wchar_t *ret_c = new wchar_t[len + 1];
+	memset(ret_c, 0, (len + 1) * sizeof(wchar_t));
+	memcpy(ret_c, ret.c_str(), len * sizeof(wchar_t));
+	return ret_c;
+}
+
 // You must free the returned string!
 // The returned string is allocated using new
 wchar_t *narrow_to_wide_c(const char *str)

src/util/string.h

@@ -47,6 +47,8 @@ struct FlagDesc {
 std::wstring utf8_to_wide(const std::string &input);
 std::string wide_to_utf8(const std::wstring &input);
 
+wchar_t *utf8_to_wide_c(const char *str);
+
 // NEVER use those two functions unless you have a VERY GOOD reason to
 // they just convert between wide and multibyte encoding
 // multibyte encoding depends on current locale, this is no good, especially on Windows