1/*-
2 * Generic "support" routines to replace those obtained from libiberty for ld.
3 *
4 * I've collected these from random bits of (published) code I've written
5 * over the years, not that they are a big deal.  peter@freebsd.org
6 *
7 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
8 *
9 * Copyright (C) 1996
10 *	Peter Wemm.  All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *-
33 * $FreeBSD$
34 */
35#include <sys/types.h>
36#include <string.h>
37#include <stdlib.h>
38#include <err.h>
39
40#include "support.h"
41
42char *
43concat(const char *s1, const char *s2, const char *s3)
44{
45	int len = 1;
46	char *s;
47	if (s1)
48		len += strlen(s1);
49	if (s2)
50		len += strlen(s2);
51	if (s3)
52		len += strlen(s3);
53	s = xmalloc(len);
54	s[0] = '\0';
55	if (s1)
56		strcat(s, s1);
57	if (s2)
58		strcat(s, s2);
59	if (s3)
60		strcat(s, s3);
61	return s;
62}
63
64void *
65xmalloc(size_t n)
66{
67	char *p = malloc(n);
68
69	if (p == NULL)
70		errx(1, "Could not allocate memory");
71
72	return p;
73}
74
75void *
76xrealloc(void *p, size_t n)
77{
78	p = realloc(p, n);
79
80	if (p == NULL)
81		errx(1, "Could not allocate memory");
82
83	return p;
84}
85