stringlist.c revision 108868 
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 108868 2003-01-07 06:55:58Z tjr $");
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 = malloc(sizeof(StringList));
55	if (sl == NULL)
56		_err(1, "stringlist: %m");
57
58	sl->sl_cur = 0;
59	sl->sl_max = _SL_CHUNKSIZE;
60	sl->sl_str = malloc(sl->sl_max * sizeof(char *));
61	if (sl->sl_str == NULL)
62		_err(1, "stringlist: %m");
63	return sl;
64}
65
66
67/*
68 * sl_add(): Add an item to the string list
69 */
70void
71sl_add(sl, name)
72	StringList *sl;
73	char *name;
74{
75	if (sl->sl_cur == sl->sl_max - 1) {
76		sl->sl_max += _SL_CHUNKSIZE;
77		sl->sl_str = reallocf(sl->sl_str, sl->sl_max * sizeof(char *));
78		if (sl->sl_str == NULL)
79			_err(1, "stringlist: %m");
80	}
81	sl->sl_str[sl->sl_cur++] = name;
82}
83
84
85/*
86 * sl_free(): Free a stringlist
87 */
88void
89sl_free(sl, all)
90	StringList *sl;
91	int all;
92{
93	size_t i;
94
95	if (sl == NULL)
96		return;
97	if (sl->sl_str) {
98		if (all)
99			for (i = 0; i < sl->sl_cur; i++)
100				free(sl->sl_str[i]);
101		free(sl->sl_str);
102	}
103	free(sl);
104}
105
106
107/*
108 * sl_find(): Find a name in the string list
109 */
110char *
111sl_find(sl, name)
112	StringList *sl;
113	char *name;
114{
115	size_t i;
116
117	for (i = 0; i < sl->sl_cur; i++)
118		if (strcmp(sl->sl_str[i], name) == 0)
119			return sl->sl_str[i];
120
121	return NULL;
122}
123