1/*	$NetBSD: strcollect.c,v 1.2 2017/01/28 21:31:50 christos Exp $	*/
2
3/*
4 * Copyright (c) 1998, 1999 Kungliga Tekniska H��gskolan
5 * (Royal Institute of Technology, Stockholm, Sweden).
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 *
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 * 3. Neither the name of the Institute nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#include <config.h>
37
38#include <stdarg.h>
39#include <stdlib.h>
40#include <string.h>
41#include <errno.h>
42#include <krb5/roken.h>
43
44enum { initial = 10, increment = 5 };
45
46static char **
47sub (char **argv, int i, int argc, va_list *ap)
48{
49    do {
50	if(i == argc) {
51	    /* realloc argv */
52	    char **tmp = realloc(argv, (argc + increment) * sizeof(*argv));
53	    if(tmp == NULL) {
54		free(argv);
55		errno = ENOMEM;
56		return NULL;
57	    }
58	    argv  = tmp;
59	    argc += increment;
60	}
61	argv[i++] = va_arg(*ap, char*);
62    } while(argv[i - 1] != NULL);
63    return argv;
64}
65
66/*
67 * return a malloced vector of pointers to the strings in `ap'
68 * terminated by NULL.
69 */
70
71ROKEN_LIB_FUNCTION char ** ROKEN_LIB_CALL
72vstrcollect(va_list *ap)
73{
74    return sub (NULL, 0, 0, ap);
75}
76
77/*
78 *
79 */
80
81ROKEN_LIB_FUNCTION char ** ROKEN_LIB_CALL
82strcollect(char *first, ...)
83{
84    va_list ap;
85    char **ret = malloc (initial * sizeof(char *));
86
87    if (ret == NULL)
88	return ret;
89
90    ret[0] = first;
91    va_start(ap, first);
92    ret = sub (ret, 1, initial, &ap);
93    va_end(ap);
94    return ret;
95}
96