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 <err.h>
17#include <stdarg.h>
18#include <stdint.h>
19#include <stdio.h>
20#include <stdlib.h>
21#include <string.h>
22
23#include "xmalloc.h"
24
25void *
26xmalloc(size_t size)
27{
28	void *ptr;
29
30	if (size == 0)
31		errx(2, "xmalloc: zero size");
32	ptr = malloc(size);
33	if (ptr == NULL)
34		err(2, "xmalloc: allocating %zu bytes", size);
35	return ptr;
36}
37
38void *
39xcalloc(size_t nmemb, size_t size)
40{
41	void *ptr;
42
43	ptr = calloc(nmemb, size);
44	if (ptr == NULL)
45		err(2, "xcalloc: allocating %zu * %zu bytes", nmemb, size);
46	return ptr;
47}
48
49void *
50xreallocarray(void *ptr, size_t nmemb, size_t size)
51{
52	void *new_ptr;
53
54	new_ptr = reallocarray(ptr, nmemb, size);
55	if (new_ptr == NULL)
56		err(2, "xreallocarray: allocating %zu * %zu bytes",
57		    nmemb, size);
58	return new_ptr;
59}
60
61char *
62xstrdup(const char *str)
63{
64	char *cp;
65
66	if ((cp = strdup(str)) == NULL)
67		err(2, "xstrdup");
68	return cp;
69}
70
71int
72xasprintf(char **ret, const char *fmt, ...)
73{
74	va_list ap;
75	int i;
76
77	va_start(ap, fmt);
78	i = vasprintf(ret, fmt, ap);
79	va_end(ap);
80
81	if (i == -1)
82		err(2, "xasprintf");
83
84	return i;
85}
86