1/*	$NetBSD: stringlist.c,v 1.12 2007/05/09 17:10:29 christos Exp $	*/
2
3/*-
4 * Copyright (c) 1994, 1999 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Christos Zoulas.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33#if defined(LIBC_SCCS) && !defined(lint)
34__RCSID("$NetBSD: stringlist.c,v 1.12 2007/05/09 17:10:29 christos Exp $");
35#endif /* LIBC_SCCS and not lint */
36
37#include "namespace.h"
38
39#include <assert.h>
40#include <err.h>
41#include <stdio.h>
42#include <stdlib.h>
43#include <string.h>
44#include <stringlist.h>
45
46#ifdef __weak_alias
47__weak_alias(sl_add,_sl_add)
48__weak_alias(sl_find,_sl_find)
49__weak_alias(sl_free,_sl_free)
50__weak_alias(sl_init,_sl_init)
51__weak_alias(sl_delete,_sl_delete)
52#endif
53
54#define _SL_CHUNKSIZE	20
55
56/*
57 * sl_init(): Initialize a string list
58 */
59StringList *
60sl_init(void)
61{
62	StringList *sl;
63
64	sl = malloc(sizeof(StringList));
65	if (sl == NULL)
66		return NULL;
67
68	sl->sl_cur = 0;
69	sl->sl_max = _SL_CHUNKSIZE;
70	sl->sl_str = malloc(sl->sl_max * sizeof(char *));
71	if (sl->sl_str == NULL) {
72		free(sl);
73		sl = NULL;
74	}
75	return sl;
76}
77
78
79/*
80 * sl_add(): Add an item to the string list
81 */
82int
83sl_add(StringList *sl, char *name)
84{
85
86	_DIAGASSERT(sl != NULL);
87
88	if (sl->sl_cur == sl->sl_max - 1) {
89		char	**new;
90
91		new = realloc(sl->sl_str,
92		    (sl->sl_max + _SL_CHUNKSIZE) * sizeof(char *));
93		if (new == NULL)
94			return -1;
95		sl->sl_max += _SL_CHUNKSIZE;
96		sl->sl_str = new;
97	}
98	sl->sl_str[sl->sl_cur++] = name;
99	return 0;
100}
101
102
103/*
104 * sl_free(): Free a stringlist
105 */
106void
107sl_free(StringList *sl, int all)
108{
109	size_t i;
110
111	if (sl == NULL)
112		return;
113	if (sl->sl_str) {
114		if (all)
115			for (i = 0; i < sl->sl_cur; i++)
116				free(sl->sl_str[i]);
117		free(sl->sl_str);
118	}
119	free(sl);
120}
121
122
123/*
124 * sl_find(): Find a name in the string list
125 */
126char *
127sl_find(StringList *sl, const char *name)
128{
129	size_t i;
130
131	_DIAGASSERT(sl != NULL);
132
133	for (i = 0; i < sl->sl_cur; i++)
134		if (strcmp(sl->sl_str[i], name) == 0)
135			return sl->sl_str[i];
136
137	return NULL;
138}
139
140int
141sl_delete(StringList *sl, const char *name, int all)
142{
143	size_t i, j;
144
145	for (i = 0; i < sl->sl_cur; i++)
146		if (strcmp(sl->sl_str[i], name) == 0) {
147			if (all)
148				free(sl->sl_str[i]);
149			for (j = i + 1; j < sl->sl_cur; j++)
150				sl->sl_str[j - 1] = sl->sl_str[j];
151			sl->sl_str[--sl->sl_cur] = NULL;
152			return 0;
153		}
154	return -1;
155}
156
157