/*
 * Generic vector interface header.
 * Copyright (C) 1997, 98 Kunihiro Ishiguro
 *
 * This file is part of GNU Zebra.
 *
 * GNU Zebra 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.
 *
 * GNU Zebra 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 Zebra; see the file COPYING.  If not, write to the Free
 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.  
 */

#ifndef _ZEBRA_VECTOR_H
#define _ZEBRA_VECTOR_H

/* struct for vector */
struct _vector 
{
  unsigned int active;		/* number of active slots */
  unsigned int alloced;		/* number of allocated slot */
  void **index;			/* index to data */
};
typedef struct _vector *vector;

#define VECTOR_MIN_SIZE 1

/* (Sometimes) usefull macros.  This macro convert index expression to
 array expression. */
/* Reference slot at given index, caller must ensure slot is active */
#define vector_slot(V,I)  ((V)->index[(I)])
/* Number of active slots. 
 * Note that this differs from vector_count() as it the count returned
 * will include any empty slots
 */
#define vector_active(V) ((V)->active)

/* Prototypes. */
extern vector vector_init (unsigned int size);
extern void vector_ensure (vector v, unsigned int num);
extern int vector_empty_slot (vector v);
extern int vector_set (vector v, void *val);
extern int vector_set_index (vector v, unsigned int i, void *val);
extern void vector_unset (vector v, unsigned int i);
extern unsigned int vector_count (vector v);
extern void vector_only_wrapper_free (vector v);
extern void vector_only_index_free (void *index);
extern void vector_free (vector v);
extern vector vector_copy (vector v);

extern void *vector_lookup (vector, unsigned int);
extern void *vector_lookup_ensure (vector, unsigned int);

#endif /* _ZEBRA_VECTOR_H */