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 * Copyright (C) 1996
8 *	Peter Wemm.  All rights reserved.
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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY 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 * $FreeBSD$
32 */
33#include <sys/types.h>
34#include <string.h>
35#include <stdlib.h>
36#include <err.h>
37
38#include "support.h"
39
40char *
41concat(const char *s1, const char *s2, const char *s3)
42{
43	int len = 1;
44	char *s;
45	if (s1)
46		len += strlen(s1);
47	if (s2)
48		len += strlen(s2);
49	if (s3)
50		len += strlen(s3);
51	s = xmalloc(len);
52	s[0] = '\0';
53	if (s1)
54		strcat(s, s1);
55	if (s2)
56		strcat(s, s2);
57	if (s3)
58		strcat(s, s3);
59	return s;
60}
61
62void *
63xmalloc(size_t n)
64{
65	char *p = malloc(n);
66
67	if (p == NULL)
68		errx(1, "Could not allocate memory");
69
70	return p;
71}
72
73void *
74xrealloc(void *p, size_t n)
75{
76	p = realloc(p, n);
77
78	if (p == NULL)
79		errx(1, "Could not allocate memory");
80
81	return p;
82}
83