support.c revision 140072 
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: head/libexec/rtld-aout/support.c 140072 2005-01-11 16:40:29Z trhodes $
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(s1, s2, s3)
42	const char *s1, *s2, *s3;
43{
44	int len = 1;
45	char *s;
46	if (s1)
47		len += strlen(s1);
48	if (s2)
49		len += strlen(s2);
50	if (s3)
51		len += strlen(s3);
52	s = xmalloc(len);
53	s[0] = '\0';
54	if (s1)
55		strcat(s, s1);
56	if (s2)
57		strcat(s, s2);
58	if (s3)
59		strcat(s, s3);
60	return s;
61}
62
63void *
64xmalloc(n)
65	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(p, n)
77	void *p;
78	size_t n;
79{
80	p = realloc(p, n);
81
82	if (p == NULL)
83		errx(1, "Could not allocate memory");
84
85	return p;
86}
87