Drop wide/narrow conversion functions

The only valid usecase for these is interfacing with OS APIs
that want a locale/OS-specific multibyte encoding.
But they weren't used for that anywhere, instead UTF-8 is pretty
much assumed when it comes to that.
Since these are only a potential source of bugs and do not fulfil
their purpose at all, drop them entirely.

11 files changed, 41 insertions, 143 deletions

diff --git a/src/chat.cpp b/src/chat.cpp
index 2f65e68b3..c9317a079 100644
--- a/src/chat.cpp
+++ b/src/chat.cpp
@@ -485,8 +485,8 @@ void ChatPrompt::nickCompletion(const std::list<std::string>& names, bool backwa
 	// find all names that start with the selected prefix
 	std::vector<std::wstring> completions;
 	for (const std::string &name : names) {
-		if (str_starts_with(narrow_to_wide(name), prefix, true)) {
-			std::wstring completion = narrow_to_wide(name);
+		std::wstring completion = utf8_to_wide(name);
+		if (str_starts_with(completion, prefix, true)) {
 			if (prefix_start == 0)
 				completion += L": ";
 			completions.push_back(completion);
diff --git a/src/client/client.cpp b/src/client/client.cpp
index 61888b913..ef4a3cdfc 100644
--- a/src/client/client.cpp
+++ b/src/client/client.cpp
@@ -1196,7 +1196,7 @@ void Client::sendChatMessage(const std::wstring &message)
 	if (canSendChatMessage()) {
 		u32 now = time(NULL);
 		float time_passed = now - m_last_chat_message_sent;
-		m_last_chat_message_sent = time(NULL);
+		m_last_chat_message_sent = now;
 
 		m_chat_message_allowance += time_passed * (CLIENT_CHAT_MESSAGE_LIMIT_PER_10S / 8.0f);
 		if (m_chat_message_allowance > CLIENT_CHAT_MESSAGE_LIMIT_PER_10S)
@@ -1832,7 +1832,7 @@ void Client::makeScreenshot()
 				sstr << "Failed to save screenshot '" << filename << "'";
 			}
 			pushToChatQueue(new ChatMessage(CHATMESSAGE_TYPE_SYSTEM,
-					narrow_to_wide(sstr.str())));
+					utf8_to_wide(sstr.str())));
 			infostream << sstr.str() << std::endl;
 			image->drop();
 		}
diff --git a/src/client/keycode.cpp b/src/client/keycode.cpp
index 6a0e9f569..ce5214f54 100644
--- a/src/client/keycode.cpp
+++ b/src/client/keycode.cpp
@@ -316,7 +316,8 @@ KeyPress::KeyPress(const char *name)
 	int chars_read = mbtowc(&Char, name, 1);
 	FATAL_ERROR_IF(chars_read != 1, "Unexpected multibyte character");
 	m_name = "";
-	warningstream << "KeyPress: Unknown key '" << name << "', falling back to first char.";
+	warningstream << "KeyPress: Unknown key '" << name
+		<< "', falling back to first char." << std::endl;
 }
 
 KeyPress::KeyPress(const irr::SEvent::SKeyInput &in, bool prefer_character)
diff --git a/src/gui/guiConfirmRegistration.cpp b/src/gui/guiConfirmRegistration.cpp
index 020a2796a..4a798c39b 100644
--- a/src/gui/guiConfirmRegistration.cpp
+++ b/src/gui/guiConfirmRegistration.cpp
@@ -192,8 +192,7 @@ void GUIConfirmRegistration::acceptInput()
 
 bool GUIConfirmRegistration::processInput()
 {
-	std::wstring m_password_ws = narrow_to_wide(m_password);
-	if (m_password_ws != m_pass_confirm) {
+	if (utf8_to_wide(m_password) != m_pass_confirm) {
 		gui::IGUIElement *e = getElementFromId(ID_message);
 		if (e)
 			e->setVisible(true);
diff --git a/src/network/serverpackethandler.cpp b/src/network/serverpackethandler.cpp
index 4d79f375c..02af06abc 100644
--- a/src/network/serverpackethandler.cpp
+++ b/src/network/serverpackethandler.cpp
@@ -778,15 +778,13 @@ void Server::handleCommand_ChatMessage(NetworkPacket* pkt)
 		return;
 	}
 
-	// Get player name of this client
 	std::string name = player->getName();
-	std::wstring wname = narrow_to_wide(name);
 
-	std::wstring answer_to_sender = handleChat(name, wname, message, true, player);
+	std::wstring answer_to_sender = handleChat(name, message, true, player);
 	if (!answer_to_sender.empty()) {
 		// Send the answer to sender
-		SendChatMessage(peer_id, ChatMessage(CHATMESSAGE_TYPE_NORMAL,
-			answer_to_sender, wname));
+		SendChatMessage(peer_id, ChatMessage(CHATMESSAGE_TYPE_SYSTEM,
+			answer_to_sender));
 	}
 }
 
diff --git a/src/script/lua_api/l_server.cpp b/src/script/lua_api/l_server.cpp
index 78cf4b403..bf5292521 100644
--- a/src/script/lua_api/l_server.cpp
+++ b/src/script/lua_api/l_server.cpp
@@ -44,7 +44,7 @@ int ModApiServer::l_request_shutdown(lua_State *L)
 int ModApiServer::l_get_server_status(lua_State *L)
 {
 	NO_MAP_LOCK_REQUIRED;
-	lua_pushstring(L, wide_to_narrow(getServer(L)->getStatusString()).c_str());
+	lua_pushstring(L, getServer(L)->getStatusString().c_str());
 	return 1;
 }
 
diff --git a/src/server.cpp b/src/server.cpp
index 90496129e..907bc6d24 100644
--- a/src/server.cpp
+++ b/src/server.cpp
@@ -2955,7 +2955,7 @@ void Server::handleChatInterfaceEvent(ChatEvent *evt)
 	}
 }
 
-std::wstring Server::handleChat(const std::string &name, const std::wstring &wname,
+std::wstring Server::handleChat(const std::string &name,
 	std::wstring wmessage, bool check_shout_priv, RemotePlayer *player)
 {
 	// If something goes wrong, this player is to blame
@@ -2993,7 +2993,7 @@ std::wstring Server::handleChat(const std::string &name, const std::wstring &wna
 
 	auto message = trim(wide_to_utf8(wmessage));
 	if (message.find_first_of("\n\r") != std::wstring::npos) {
-		return L"New lines are not permitted in chat messages";
+		return L"Newlines are not permitted in chat messages";
 	}
 
 	// Run script hook, exit if script ate the chat message
@@ -3014,10 +3014,10 @@ std::wstring Server::handleChat(const std::string &name, const std::wstring &wna
 			the Cyrillic alphabet and some characters on older Android devices
 		*/
 #ifdef __ANDROID__
-		line += L"<" + wname + L"> " + wmessage;
+		line += L"<" + utf8_to_wide(name) + L"> " + wmessage;
 #else
-		line += narrow_to_wide(m_script->formatChatMessage(name,
-				wide_to_narrow(wmessage)));
+		line += utf8_to_wide(m_script->formatChatMessage(name,
+				wide_to_utf8(wmessage)));
 #endif
 	}
 
@@ -3030,35 +3030,23 @@ std::wstring Server::handleChat(const std::string &name, const std::wstring &wna
 	/*
 		Send the message to others
 	*/
-	actionstream << "CHAT: " << wide_to_narrow(unescape_enriched(line)) << std::endl;
+	actionstream << "CHAT: " << wide_to_utf8(unescape_enriched(line)) << std::endl;
 
-	std::vector<session_t> clients = m_clients.getClientIDs();
-
-	/*
-		Send the message back to the inital sender
-		if they are using protocol version >= 29
-	*/
-
-	session_t peer_id_to_avoid_sending =
-		(player ? player->getPeerId() : PEER_ID_INEXISTENT);
+	ChatMessage chatmsg(line);
 
-	if (player && player->protocol_version >= 29)
-		peer_id_to_avoid_sending = PEER_ID_INEXISTENT;
+	std::vector<session_t> clients = m_clients.getClientIDs();
+	for (u16 cid : clients)
+		SendChatMessage(cid, chatmsg);
 
-	for (u16 cid : clients) {
-		if (cid != peer_id_to_avoid_sending)
-			SendChatMessage(cid, ChatMessage(line));
-	}
 	return L"";
 }
 
 void Server::handleAdminChat(const ChatEventChat *evt)
 {
 	std::string name = evt->nick;
-	std::wstring wname = utf8_to_wide(name);
 	std::wstring wmessage = evt->evt_msg;
 
-	std::wstring answer = handleChat(name, wname, wmessage);
+	std::wstring answer = handleChat(name, wmessage);
 
 	// If asked to send answer to sender
 	if (!answer.empty()) {
@@ -3095,46 +3083,43 @@ PlayerSAO *Server::getPlayerSAO(session_t peer_id)
 	return player->getPlayerSAO();
 }
 
-std::wstring Server::getStatusString()
+std::string Server::getStatusString()
 {
-	std::wostringstream os(std::ios_base::binary);
-	os << L"# Server: ";
+	std::ostringstream os(std::ios_base::binary);
+	os << "# Server: ";
 	// Version
-	os << L"version=" << narrow_to_wide(g_version_string);
+	os << "version=" << g_version_string;
 	// Uptime
-	os << L", uptime=" << m_uptime_counter->get();
+	os << ", uptime=" << m_uptime_counter->get();
 	// Max lag estimate
-	os << L", max_lag=" << (m_env ? m_env->getMaxLagEstimate() : 0);
+	os << ", max_lag=" << (m_env ? m_env->getMaxLagEstimate() : 0);
 
 	// Information about clients
 	bool first = true;
-	os << L", clients={";
+	os << ", clients={";
 	if (m_env) {
 		std::vector<session_t> clients = m_clients.getClientIDs();
 		for (session_t client_id : clients) {
 			RemotePlayer *player = m_env->getPlayer(client_id);
 
 			// Get name of player
-			std::wstring name = L"unknown";
-			if (player)
-				name = narrow_to_wide(player->getName());
+			const char *name = player ? player->getName() : "<unknown>";
 
 			// Add name to information string
 			if (!first)
-				os << L", ";
+				os << ", ";
 			else
 				first = false;
-
 			os << name;
 		}
 	}
-	os << L"}";
+	os << "}";
 
 	if (m_env && !((ServerMap*)(&m_env->getMap()))->isSavingEnabled())
-		os << std::endl << L"# Server: " << " WARNING: Map saving is disabled.";
+		os << std::endl << "# Server: " << " WARNING: Map saving is disabled.";
 
 	if (!g_settings->get("motd").empty())
-		os << std::endl << L"# Server: " << narrow_to_wide(g_settings->get("motd"));
+		os << std::endl << "# Server: " << g_settings->get("motd");
 
 	return os.str();
 }
diff --git a/src/server.h b/src/server.h
index 5c143a657..0b4084aa9 100644
--- a/src/server.h
+++ b/src/server.h
@@ -219,7 +219,7 @@ public:
 	void onMapEditEvent(const MapEditEvent &event);
 
 	// Connection must be locked when called
-	std::wstring getStatusString();
+	std::string getStatusString();
 	inline double getUptime() const { return m_uptime_counter->get(); }
 
 	// read shutdown state
@@ -495,10 +495,8 @@ private:
 	void handleChatInterfaceEvent(ChatEvent *evt);
 
 	// This returns the answer to the sender of wmessage, or "" if there is none
-	std::wstring handleChat(const std::string &name, const std::wstring &wname,
-		std::wstring wmessage_input,
-		bool check_shout_priv = false,
-		RemotePlayer *player = NULL);
+	std::wstring handleChat(const std::string &name, std::wstring wmessage_input,
+		bool check_shout_priv = false, RemotePlayer *player = nullptr);
 	void handleAdminChat(const ChatEventChat *evt);
 
 	// When called, connection mutex should be locked
diff --git a/src/unittest/test_utilities.cpp b/src/unittest/test_utilities.cpp
index 5559cdbf2..93ba3f844 100644
--- a/src/unittest/test_utilities.cpp
+++ b/src/unittest/test_utilities.cpp
@@ -247,8 +247,8 @@ void TestUtilities::testStartsWith()
 
 void TestUtilities::testStrEqual()
 {
-	UASSERT(str_equal(narrow_to_wide("abc"), narrow_to_wide("abc")));
-	UASSERT(str_equal(narrow_to_wide("ABC"), narrow_to_wide("abc"), true));
+	UASSERT(str_equal(utf8_to_wide("abc"), utf8_to_wide("abc")));
+	UASSERT(str_equal(utf8_to_wide("ABC"), utf8_to_wide("abc"), true));
 }
 
 
diff --git a/src/util/string.cpp b/src/util/string.cpp
index 7e6d6d3b3..611ad35cb 100644
--- a/src/util/string.cpp
+++ b/src/util/string.cpp
@@ -175,62 +175,6 @@ wchar_t *utf8_to_wide_c(const char *str)
 	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)
-{
-	wchar_t *nstr = nullptr;
-#if defined(_WIN32)
-	int nResult = MultiByteToWideChar(CP_UTF8, 0, (LPCSTR) str, -1, 0, 0);
-	if (nResult == 0) {
-		errorstream<<"gettext: MultiByteToWideChar returned null"<<std::endl;
-	} else {
-		nstr = new wchar_t[nResult];
-		MultiByteToWideChar(CP_UTF8, 0, (LPCSTR) str, -1, (WCHAR *) nstr, nResult);
-	}
-#else
-	size_t len = strlen(str);
-	nstr = new wchar_t[len + 1];
-
-	std::wstring intermediate = narrow_to_wide(str);
-	memset(nstr, 0, (len + 1) * sizeof(wchar_t));
-	memcpy(nstr, intermediate.c_str(), len * sizeof(wchar_t));
-#endif
-
-	return nstr;
-}
-
-std::wstring narrow_to_wide(const std::string &mbs) {
-#ifdef __ANDROID__
-	return utf8_to_wide(mbs);
-#else
-	size_t wcl = mbs.size();
-	Buffer<wchar_t> wcs(wcl + 1);
-	size_t len = mbstowcs(*wcs, mbs.c_str(), wcl);
-	if (len == (size_t)(-1))
-		return L"<invalid multibyte string>";
-	wcs[len] = 0;
-	return *wcs;
-#endif
-}
-
-
-std::string wide_to_narrow(const std::wstring &wcs)
-{
-#ifdef __ANDROID__
-	return wide_to_utf8(wcs);
-#else
-	size_t mbl = wcs.size() * 4;
-	SharedBuffer<char> mbs(mbl+1);
-	size_t len = wcstombs(*mbs, wcs.c_str(), mbl);
-	if (len == (size_t)(-1))
-		return "Character conversion failed!";
-
-	mbs[len] = 0;
-	return *mbs;
-#endif
-}
-
 
 std::string urlencode(const std::string &str)
 {
@@ -757,7 +701,8 @@ void translate_string(const std::wstring &s, Translations *translations,
 		} else {
 			// This is an escape sequence *inside* the template string to translate itself.
 			// This should not happen, show an error message.
-			errorstream << "Ignoring escape sequence '" << wide_to_narrow(escape_sequence) << "' in translation" << std::endl;
+			errorstream << "Ignoring escape sequence '"
+				<< wide_to_utf8(escape_sequence) << "' in translation" << std::endl;
 		}
 	}
 
diff --git a/src/util/string.h b/src/util/string.h
index ec14e9a2d..d4afcaec8 100644
--- a/src/util/string.h
+++ b/src/util/string.h
@@ -73,16 +73,6 @@ std::string wide_to_utf8(const std::wstring &input);
 // The returned string is allocated using new[]
 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
-
-// You must free the returned string!
-// The returned string is allocated using new
-wchar_t *narrow_to_wide_c(const char *str);
-std::wstring narrow_to_wide(const std::string &mbs);
-std::string wide_to_narrow(const std::wstring &wcs);
-
 std::string urlencode(const std::string &str);
 std::string urldecode(const std::string &str);
 u32 readFlagString(std::string str, const FlagDesc *flagdesc, u32 *flagmask);
@@ -355,11 +345,6 @@ inline s32 mystoi(const std::string &str, s32 min, s32 max)
 	return i;
 }
 
-
-// MSVC2010 includes it's own versions of these
-//#if !defined(_MSC_VER) || _MSC_VER < 1600
-
-
 /**
  * Returns a 32-bit value reprensented by the string \p str (decimal).
  * @see atoi(3) for further limitations
@@ -369,17 +354,6 @@ inline s32 mystoi(const std::string &str)
 	return atoi(str.c_str());
 }
 
-
-/**
- * Returns s 32-bit value represented by the wide string \p str (decimal).
- * @see atoi(3) for further limitations
- */
-inline s32 mystoi(const std::wstring &str)
-{
-	return mystoi(wide_to_narrow(str));
-}
-
-
 /**
  * Returns a float reprensented by the string \p str (decimal).
  * @see atof(3)
@@ -389,8 +363,6 @@ inline float mystof(const std::string &str)
 	return atof(str.c_str());
 }
 
-//#endif
-
 #define stoi mystoi
 #define stof mystof