1/***********************************************************************
2*                                                                      *
3*               This software is part of the ast package               *
4*          Copyright (c) 1985-2011 AT&T Intellectual Property          *
5*                      and is licensed under the                       *
6*                  Common Public License, Version 1.0                  *
7*                    by AT&T Intellectual Property                     *
8*                                                                      *
9*                A copy of the License is available at                 *
10*            http://www.opensource.org/licenses/cpl1.0.txt             *
11*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
12*                                                                      *
13*              Information and Software Systems Research               *
14*                            AT&T Research                             *
15*                           Florham Park NJ                            *
16*                                                                      *
17*                 Glenn Fowler <gsf@research.att.com>                  *
18*                  David Korn <dgk@research.att.com>                   *
19*                   Phong Vo <kpv@research.att.com>                    *
20*                                                                      *
21***********************************************************************/
22#pragma prototyped
23/*
24 * struniq - uniq a sorted argv
25 * 0 sentinel is neither expected nor restored
26 *
27 * Glenn Fowler
28 * David Korn
29 * AT&T Research
30 */
31
32#include <ast.h>
33
34int
35struniq(char** argv, int n)
36{
37	register char**	ao;
38	register char**	an;
39	register char**	ae;
40
41	ao = an = argv;
42	ae = ao + n;
43	while (++an < ae)
44	{
45		while (streq(*ao, *an))
46			if (++an >= ae)
47				return ao - argv + 1;
48		*++ao = *an;
49	}
50	return ao - argv + 1;
51}
52