diff -r fd669e73d39a -r 0e7c57d48d1e src/lib/JavaPropertiesUnescapingINIHandler.h
--- a/src/lib/JavaPropertiesUnescapingINIHandler.h	Thu Nov 26 11:42:26 2020 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,105 +0,0 @@
-/**
- * Relational pipes
- * Copyright © 2020 František Kučera (Frantovo.cz, GlobalCode.info)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, version 3 of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-#pragma once
-
-#include <sstream>
-#include <codecvt>
-#include <arpa/inet.h>
-
-#include "UnescapingINIHandler.h"
-
-using namespace std;
-using namespace relpipe::writer;
-
-namespace relpipe {
-namespace in {
-namespace ini {
-namespace lib {
-
-class JavaPropertiesUnescapingINIContentHandler : public UnescapingINIContentHandler {
-private:
-	wstring_convert < codecvt_utf8<wchar_t>> convertor; // INI parser works with UTF-8
-
-	bool readHex(const char* hexadecimal, size_t hexLength, uint8_t* resultBuffer, size_t binLength) {
-		if (hexLength != binLength * 2) return false;
-
-		for (size_t i = 0; i < binLength; i++) {
-			uint8_t value = 0;
-			char a = hexadecimal[i * 2];
-			char b = hexadecimal[i * 2 + 1];
-
-			if (a >= '0' && a <= '9') value += (a - '0')*16;
-			else if (a >= 'a' && a <= 'f') value += (a - 'a' + 10)*16;
-			else if (a >= 'A' && a <= 'F') value += (a - 'A' + 10)*16;
-			else return false;
-
-			if (b >= '0' && b <= '9') value += b - '0';
-			else if (b >= 'a' && b <= 'f') value += b - 'a' + 10;
-			else if (b >= 'A' && b <= 'F') value += b - 'A' + 10;
-			else return false;
-
-			if (resultBuffer) resultBuffer[i] = value;
-		}
-		return true;
-	}
-
-protected:
-
-	virtual std::string unescape(const std::string& s) {
-		std::stringstream result;
-		for (int i = 0, length = s.size(); i < length; i++) {
-			char ch = s[i];
-			if (i + 1 < length && ch == ESC) {
-				ch = s[i + 1];
-				if (ch == 'u') {
-					// TODO: simplify, clean-up, verify (but seems working)
-					i++;
-					int hexLength = 4;
-					if (i + hexLength < length) {
-						uint16_t u16;
-						bool hexOK = readHex(s.c_str() + i + 1, hexLength, (uint8_t*) & u16, sizeof (u16));
-						if (hexOK) result << convertor.to_bytes(ntohs(u16));
-						else throw std::logic_error(std::string("Invalid unicode escape sequence: invalid HEX"));
-						i += hexLength;
-					} else {
-						throw std::logic_error(std::string("Invalid unicode escape sequence: missing characters"));
-					}
-
-				} else if (ch == ESC && !lastEscaphingPhase) put(result, ESC, i).put(ESC); // copy and skip even the second \ to avoid its misinterpretation in the next cycle
-				else if (ch == ESC && lastEscaphingPhase) put(result, ESC, i); // unescape \\ to \.
-				else if (lastEscaphingPhase) throw std::logic_error(std::string("Unsupported escape sequence: ") + ch);
-				else result.put(ESC); // keep the escape sequence for later unescaping phase
-			} else if (ch == ESC) {
-				throw std::logic_error(std::string("Missing escape sequence")); // this should not happen
-			} else {
-				result.put(ch);
-			}
-		}
-		return result.str();
-	}
-
-public:
-
-	JavaPropertiesUnescapingINIContentHandler(INIContentHandler& output, bool lastEscaphingPhase) : UnescapingINIContentHandler(output, lastEscaphingPhase, true) {
-	}
-
-};
-
-}
-}
-}
-}