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diff --git a/src/htsencoding.h b/src/htsencoding.h
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+/* ------------------------------------------------------------ */
+/*
+HTTrack Website Copier, Offline Browser for Windows and Unix
+Copyright (C) Xavier Roche and other contributors
+
+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 3
+of the License, or 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+Important notes:
+
+- We hereby ask people using this source NOT to use it in purpose of grabbing
+emails addresses, or collecting any other private information on persons.
+This would disgrace our work, and spoil the many hours we spent on it.
+
+Please visit our Website: http://www.httrack.com
+*/
+
+/* ------------------------------------------------------------ */
+/* File: Encoding conversion functions                          */
+/* Author: Xavier Roche                                         */
+/* ------------------------------------------------------------ */
+
+#ifndef HTS_CHARSET_DEFH
+#define HTS_CHARSET_DEFH
+
+/** Standard includes. **/
+#include <stdlib.h>
+#include <string.h>
+#ifdef _WIN32
+#include <windows.h>
+#endif
+
+/**
+ * Unescape HTML entities (as per HTML 4.0 Specification)
+ * and replace them in-place by their UTF-8 equivalents.
+ * Note: source and destination may be the same, and the destination only
+ * needs to hold as space as the source.
+ * Returns 0 upon success.
+ **/
+extern int hts_unescape_entities(const char *src,
+                                 char *dest, const size_t max);
+
+#endif
+