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diff --git a/src/util/Tokenizer.hxx b/src/util/Tokenizer.hxx
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+++ b/src/util/Tokenizer.hxx
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+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_TOKENIZER_HXX
+#define MPD_TOKENIZER_HXX
+
+class Error;
+
+class Tokenizer {
+	char *input;
+
+public:
+	/**
+	 * @param _input the input string; the contents will be
+	 * modified by this class
+	 */
+	constexpr Tokenizer(char *_input):input(_input) {}
+
+	Tokenizer(const Tokenizer &) = delete;
+	Tokenizer &operator=(const Tokenizer &) = delete;
+
+	char *Rest() {
+		return input;
+	}
+
+	char CurrentChar() const {
+		return *input;
+	}
+
+	bool IsEnd() const {
+		return CurrentChar() == 0;
+	}
+
+	/**
+	 * Reads the next word.
+	 *
+	 * @param error if this function returns nullptr and
+	 * **input_p!=0, it provides an #Error object in
+	 * this argument
+	 * @return a pointer to the null-terminated word, or nullptr
+	 * on error or end of line
+	 */
+	char *NextWord(Error &error);
+
+	/**
+	 * Reads the next unquoted word from the input string.
+	 *
+	 * @param error_r if this function returns nullptr and **input_p!=0, it
+	 * provides an #Error object in this argument
+	 * @return a pointer to the null-terminated word, or nullptr
+	 * on error or end of line
+	 */
+	char *NextUnquoted(Error &error);
+
+	/**
+	 * Reads the next quoted string from the input string.  A backslash
+	 * escapes the following character.  This function modifies the input
+	 * string.
+	 *
+	 * @param input_p the input string; this function returns a pointer to
+	 * the first non-whitespace character of the following token
+	 * @param error_r if this function returns nullptr and **input_p!=0, it
+	 * provides an #Error object in this argument
+	 * @return a pointer to the null-terminated string, or nullptr on error
+	 * or end of line
+	 */
+	char *NextString(Error &error);
+
+	/**
+	 * Reads the next unquoted word or quoted string from the
+	 * input.  This is a wrapper for NextUnquoted() and
+	 * NextString().
+	 *
+	 * @param error_r if this function returns nullptr and
+	 * **input_p!=0, it provides an #Error object in
+	 * this argument
+	 * @return a pointer to the null-terminated string, or nullptr
+	 * on error or end of line
+	 */
+	char *NextParam(Error &error);
+};
+
+#endif