1/* $OpenBSD: xmalloc.c,v 1.10 2019/06/28 05:44:09 deraadt Exp $ */
2/*
3 * Author: Tatu Ylonen <ylo@cs.hut.fi>
4 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5 *                    All rights reserved
6 * Versions of malloc and friends that check their results, and never return
7 * failure (they call fatal if they encounter an error).
8 *
9 * As far as I am concerned, the code I have written for this software
10 * can be used freely for any purpose.  Any derived versions of this
11 * software must be clearly marked as such, and if the derived work is
12 * incompatible with the protocol description in the RFC file, it must be
13 * called by a name other than "ssh" or "Secure Shell".
14 */
15
16#include <sys/cdefs.h>
17__FBSDID("$FreeBSD: stable/11/usr.bin/diff/xmalloc.c 360405 2020-04-27 22:34:45Z kevans $");
18
19#include <err.h>
20#include <stdarg.h>
21#include <stdint.h>
22#include <stdio.h>
23#include <stdlib.h>
24#include <string.h>
25
26#include "xmalloc.h"
27
28void *
29xmalloc(size_t size)
30{
31	void *ptr;
32
33	if (size == 0)
34		errx(2, "xmalloc: zero size");
35	ptr = malloc(size);
36	if (ptr == NULL)
37		err(2, "xmalloc: allocating %zu bytes", size);
38	return ptr;
39}
40
41void *
42xcalloc(size_t nmemb, size_t size)
43{
44	void *ptr;
45
46	ptr = calloc(nmemb, size);
47	if (ptr == NULL)
48		err(2, "xcalloc: allocating %zu * %zu bytes", nmemb, size);
49	return ptr;
50}
51
52void *
53xreallocarray(void *ptr, size_t nmemb, size_t size)
54{
55	void *new_ptr;
56
57	new_ptr = reallocarray(ptr, nmemb, size);
58	if (new_ptr == NULL)
59		err(2, "xreallocarray: allocating %zu * %zu bytes",
60		    nmemb, size);
61	return new_ptr;
62}
63
64char *
65xstrdup(const char *str)
66{
67	char *cp;
68
69	if ((cp = strdup(str)) == NULL)
70		err(2, "xstrdup");
71	return cp;
72}
73
74int
75xasprintf(char **ret, const char *fmt, ...)
76{
77	va_list ap;
78	int i;
79
80	va_start(ap, fmt);
81	i = vasprintf(ret, fmt, ap);
82	va_end(ap);
83
84	if (i == -1)
85		err(2, "xasprintf");
86
87	return i;
88}
89