zxing-cpp: strip to core library only (remove tests/wrappers/examples/docs); .gitignore: fix /core to allow zxing-cpp/core/ dir

tools/chatgui/zxing-cpp/core/src/TextEncoder.h

@@ -0,0 +1,31 @@
+/*
+* Copyright 2016 Nu-book Inc.
+*/
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include "CharacterSet.h"
+
+#include <string>
+
+namespace ZXing {
+
+class TextEncoder
+{
+	static void GetBytes(const std::string& str, CharacterSet charset, std::string& bytes);
+	static void GetBytes(const std::wstring& str, CharacterSet charset, std::string& bytes);
+public:
+	static std::string FromUnicode(const std::string& str, CharacterSet charset) {
+		std::string r;
+		GetBytes(str, charset, r);
+		return r;
+	}
+	static std::string FromUnicode(const std::wstring& str, CharacterSet charset) {
+		std::string r;
+		GetBytes(str, charset, r);
+		return r;
+	}
+};
+
+} // ZXing