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diff --git a/libshouldbeinlibc/idvec.h b/libshouldbeinlibc/idvec.h
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+/* Routines for vectors of integers
+
+   Copyright (C) 1995 Free Software Foundation, Inc.
+
+   Written by Miles Bader <miles@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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#ifndef __IVEC_H__
+#define __IVEC_H__
+
+#include <errno.h>
+
+struct ivec 
+{
+  int *ints;
+  unsigned num, alloced;
+};
+
+/* Return a new ivec, or NULL if there wasn't enough memory.  */
+struct ivec *make_ivec ();
+
+/* Insert I into IVEC at position POS, returning ENOMEM if there wasn't
+   enough memory, or 0.  */
+error_t ivec_insert (struct ivec *ivec, unsigned pos, int i);
+
+/* Add I onto the end of IVEC, returning ENOMEM if there's not enough memory,
+   or 0.  */
+error_t ivec_add (struct ivec *ivec, int i);
+
+/* Returns true if IVEC contains I.  */
+int ivec_contains (struct ivec *ivec, int i);
+
+#endif /* __IVEC_H__ */