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diff --git a/contrib/gperf/src/hash-table.h b/contrib/gperf/src/hash-table.h
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+/* This may look like C code, but it is really -*- C++ -*- */
+
+/* Hash table used to check for duplicate keyword entries.
+
+   Copyright (C) 1989-1998 Free Software Foundation, Inc.
+   written by Douglas C. Schmidt (schmidt@ics.uci.edu)
+
+This file is part of GNU GPERF.
+
+GNU GPERF 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 1, or (at your option)
+any later version.
+
+GNU GPERF 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 GNU GPERF; see the file COPYING.  If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111, USA.  */
+
+#ifndef hash_table_h
+#define hash_table_h 1
+
+#include "list-node.h"
+
+class Hash_Table
+{
+private:
+  List_Node     **table;      /* Vector of pointers to linked lists of List_Node's. */
+  int             size;       /* Size of the vector. */
+  int             collisions; /* Find out how well our double hashing is working! */
+
+public:
+                  Hash_Table (List_Node **t, int s);
+                 ~Hash_Table (void);
+  List_Node      *operator () (List_Node *item, int ignore_length);
+};
+
+#endif