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diff --git a/libs/hunspell/src/hunzip.hxx b/libs/hunspell/src/hunzip.hxx
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+++ b/libs/hunspell/src/hunzip.hxx
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+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Hunspell, based on MySpell.
+ *
+ * The Initial Developers of the Original Code are
+ * Kevin Hendricks (MySpell) and Németh László (Hunspell).
+ * Portions created by the Initial Developers are Copyright (C) 2002-2005
+ * the Initial Developers. All Rights Reserved.
+ *
+ * Contributor(s): David Einstein, Davide Prina, Giuseppe Modugno,
+ * Gianluca Turconi, Simon Brouwer, Noll János, Bíró Árpád,
+ * Goldman Eleonóra, Sarlós Tamás, Bencsáth Boldizsár, Halácsy Péter,
+ * Dvornik László, Gefferth András, Nagy Viktor, Varga Dániel, Chris Halls,
+ * Rene Engelhard, Bram Moolenaar, Dafydd Jones, Harri Pitkänen
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+/* hunzip: file decompression for sorted dictionaries with optional encryption,
+ * algorithm: prefix-suffix encoding and 16-bit Huffman encoding */
+
+#ifndef _HUNZIP_HXX_
+#define _HUNZIP_HXX_
+
+#include "hunvisapi.h"
+
+#include <stdio.h>
+
+#define BUFSIZE 65536
+#define HZIP_EXTENSION ".hz"
+
+#define MSG_OPEN "error: %s: cannot open\n"
+#define MSG_FORMAT "error: %s: not in hzip format\n"
+#define MSG_MEMORY "error: %s: missing memory\n"
+#define MSG_KEY "error: %s: missing or bad password\n"
+
+struct bit {
+  unsigned char c[2];
+  int v[2];
+};
+
+class LIBHUNSPELL_DLL_EXPORTED Hunzip {
+ private:
+  Hunzip(const Hunzip&);
+  Hunzip& operator=(const Hunzip&);
+
+ protected:
+  char* filename;
+  FILE* fin;
+  int bufsiz, lastbit, inc, inbits, outc;
+  struct bit* dec;          // code table
+  char in[BUFSIZE];         // input buffer
+  char out[BUFSIZE + 1];    // Huffman-decoded buffer
+  char line[BUFSIZE + 50];  // decoded line
+  int getcode(const char* key);
+  int getbuf();
+  int fail(const char* err, const char* par);
+
+ public:
+  Hunzip(const char* filename, const char* key = NULL);
+  ~Hunzip();
+  const char* getline();
+};
+
+#endif