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diff --git a/libidu/dynvec.h b/libidu/dynvec.h
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+/* dynvec.h -- declarations for dynamically growable vectors
+   Copyright (C) 1995 Free Software Foundation, Inc.
+   Written by Greg McGary <gkm@gnu.ai.mit.edu>
+
+   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, 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
+
+#ifndef _dynvec_h_
+#define _dynvec_h_
+
+struct dynvec
+{
+  void **dv_vec;
+  int dv_capacity;
+  int dv_fill;
+};
+
+struct dynvec *make_dynvec __P((int n));
+void dynvec_free __P((struct dynvec *dv));
+void dynvec_freeze __P((struct dynvec *dv));
+void dynvec_append __P((struct dynvec *dv, void *element));
+
+#endif /* not _dynvec_h_ */