--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/zxing-cpp/core/src/TextEncoder.cpp	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,50 @@
+/*
+* Copyright 2016 Nu-book Inc.
+*/
+// SPDX-License-Identifier: Apache-2.0
+
+#include "TextEncoder.h"
+
+#include "CharacterSet.h"
+#include "ECI.h"
+#include "Utf.h"
+#include "ZXAlgorithms.h"
+#include "libzueci/zueci.h"
+
+#include <stdexcept>
+
+namespace ZXing {
+
+void TextEncoder::GetBytes(const std::string& str, CharacterSet charset, std::string& bytes)
+{
+	int eci = ToInt(ToECI(charset));
+	const int str_len = narrow_cast<int>(str.length());
+	int eci_len;
+
+	if (eci == -1)
+		eci = 899; // Binary
+
+	bytes.clear();
+
+	int error_number = zueci_dest_len_eci(eci, reinterpret_cast<const unsigned char *>(str.data()), str_len, &eci_len);
+	if (error_number >= ZUECI_ERROR) // Shouldn't happen
+		throw std::logic_error("Internal error `zueci_dest_len_eci()`");
+
+	bytes.resize(eci_len); // Sufficient but approximate length
+
+	error_number = zueci_utf8_to_eci(eci, reinterpret_cast<const unsigned char *>(str.data()), str_len,
+									 reinterpret_cast<unsigned char *>(bytes.data()), &eci_len);
+	if (error_number >= ZUECI_ERROR) {
+		bytes.clear();
+		throw std::invalid_argument("Unexpected charcode");
+	}
+
+	bytes.resize(eci_len); // Actual length
+}
+
+void TextEncoder::GetBytes(const std::wstring& str, CharacterSet charset, std::string& bytes)
+{
+	GetBytes(ToUtf8(str), charset, bytes);
+}
+
+} // ZXing