stringlist.c revision 109508 
1/*
2 * Copyright (c) 1994 Christos Zoulas
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by Christos Zoulas.
16 * 4. The name of the author may not be used to endorse or promote products
17 *    derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
20 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
23 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#if defined(LIBC_SCCS) && !defined(lint)
33static char *rcsid = "$NetBSD: stringlist.c,v 1.2 1997/01/17 07:26:20 lukem Exp $";
34#endif /* LIBC_SCCS and not lint */
35#include <sys/cdefs.h>
36__FBSDID("$FreeBSD: head/lib/libc/gen/stringlist.c 109508 2003-01-19 01:16:01Z obrien $");
37
38#include "namespace.h"
39#include <stdio.h>
40#include <string.h>
41#include <err.h>
42#include <stdlib.h>
43#include <stringlist.h>
44#include "un-namespace.h"
45
46#define _SL_CHUNKSIZE	20
47
48/*
49 * sl_init(): Initialize a string list
50 */
51StringList *
52sl_init()
53{
54	StringList *sl;
55
56	sl = malloc(sizeof(StringList));
57	if (sl == NULL)
58		_err(1, "stringlist: %m");
59
60	sl->sl_cur = 0;
61	sl->sl_max = _SL_CHUNKSIZE;
62	sl->sl_str = malloc(sl->sl_max * sizeof(char *));
63	if (sl->sl_str == NULL)
64		_err(1, "stringlist: %m");
65	return sl;
66}
67
68
69/*
70 * sl_add(): Add an item to the string list
71 */
72int
73sl_add(sl, name)
74	StringList *sl;
75	char *name;
76{
77	if (sl->sl_cur == sl->sl_max - 1) {
78		sl->sl_max += _SL_CHUNKSIZE;
79		sl->sl_str = reallocf(sl->sl_str, sl->sl_max * sizeof(char *));
80		if (sl->sl_str == NULL)
81			return (-1);
82	}
83	sl->sl_str[sl->sl_cur++] = name;
84	return (0);
85}
86
87
88/*
89 * sl_free(): Free a stringlist
90 */
91void
92sl_free(sl, all)
93	StringList *sl;
94	int all;
95{
96	size_t i;
97
98	if (sl == NULL)
99		return;
100	if (sl->sl_str) {
101		if (all)
102			for (i = 0; i < sl->sl_cur; i++)
103				free(sl->sl_str[i]);
104		free(sl->sl_str);
105	}
106	free(sl);
107}
108
109
110/*
111 * sl_find(): Find a name in the string list
112 */
113char *
114sl_find(sl, name)
115	StringList *sl;
116	char *name;
117{
118	size_t i;
119
120	for (i = 0; i < sl->sl_cur; i++)
121		if (strcmp(sl->sl_str[i], name) == 0)
122			return sl->sl_str[i];
123
124	return NULL;
125}
126