1/* $OpenBSD: xmalloc.c,v 1.1 2017/08/11 14:21:24 mpi Exp $ */
2
3/*
4 * Author: Tatu Ylonen <ylo@cs.hut.fi>
5 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
6 *                    All rights reserved
7 * Versions of malloc and friends that check their results, and never return
8 * failure (they call fatalx if they encounter an error).
9 *
10 * As far as I am concerned, the code I have written for this software
11 * can be used freely for any purpose.  Any derived versions of this
12 * software must be clearly marked as such, and if the derived work is
13 * incompatible with the protocol description in the RFC file, it must be
14 * called by a name other than "ssh" or "Secure Shell".
15 */
16
17#include <err.h>
18#include <limits.h>
19#include <stdarg.h>
20#include <stdint.h>
21#include <stdio.h>
22#include <stdlib.h>
23#include <string.h>
24
25#include "xmalloc.h"
26
27void *
28xmalloc(size_t size)
29{
30	void *ptr;
31
32	if (size == 0)
33		errx(1, "xmalloc: zero size");
34	ptr = malloc(size);
35	if (ptr == NULL)
36		err(1, "xmalloc: allocating %zu bytes", size);
37	return ptr;
38}
39
40void *
41xcalloc(size_t nmemb, size_t size)
42{
43	void *ptr;
44
45	if (size == 0 || nmemb == 0)
46		errx(1, "xcalloc: zero size");
47	ptr = calloc(nmemb, size);
48	if (ptr == NULL)
49		err(1, "xcalloc: allocating %zu * %zu bytes",
50		    nmemb, size);
51	return ptr;
52}
53
54void *
55xrealloc(void *ptr, size_t size)
56{
57	return xreallocarray(ptr, 1, size);
58}
59
60void *
61xreallocarray(void *ptr, size_t nmemb, size_t size)
62{
63	void *new_ptr;
64
65	if (nmemb == 0 || size == 0)
66		errx(1, "xreallocarray: zero size");
67	new_ptr = reallocarray(ptr, nmemb, size);
68	if (new_ptr == NULL)
69		err(1, "xreallocarray: allocating %zu * %zu bytes",
70		    nmemb, size);
71	return new_ptr;
72}
73
74char *
75xstrdup(const char *str)
76{
77	char *cp;
78
79	if ((cp = strdup(str)) == NULL)
80		err(1, "xstrdup");
81	return cp;
82}
83