xmalloc.c revision 92555 
1/*
2 * Author: Tatu Ylonen <ylo@cs.hut.fi>
3 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4 *                    All rights reserved
5 * Versions of malloc and friends that check their results, and never return
6 * failure (they call fatal if they encounter an error).
7 *
8 * As far as I am concerned, the code I have written for this software
9 * can be used freely for any purpose.  Any derived versions of this
10 * software must be clearly marked as such, and if the derived work is
11 * incompatible with the protocol description in the RFC file, it must be
12 * called by a name other than "ssh" or "Secure Shell".
13 */
14
15#include "includes.h"
16RCSID("$OpenBSD: xmalloc.c,v 1.16 2001/07/23 18:21:46 stevesk Exp $");
17
18#include "xmalloc.h"
19#include "log.h"
20
21void *
22xmalloc(size_t size)
23{
24	void *ptr;
25
26	if (size == 0)
27		fatal("xmalloc: zero size");
28	ptr = malloc(size);
29	if (ptr == NULL)
30		fatal("xmalloc: out of memory (allocating %lu bytes)", (u_long) size);
31	return ptr;
32}
33
34void *
35xrealloc(void *ptr, size_t new_size)
36{
37	void *new_ptr;
38
39	if (new_size == 0)
40		fatal("xrealloc: zero size");
41	if (ptr == NULL)
42		new_ptr = malloc(new_size);
43	else
44		new_ptr = realloc(ptr, new_size);
45	if (new_ptr == NULL)
46		fatal("xrealloc: out of memory (new_size %lu bytes)", (u_long) new_size);
47	return new_ptr;
48}
49
50void
51xfree(void *ptr)
52{
53	if (ptr == NULL)
54		fatal("xfree: NULL pointer given as argument");
55	free(ptr);
56}
57
58char *
59xstrdup(const char *str)
60{
61	size_t len;
62	char *cp;
63
64	len = strlen(str) + 1;
65	cp = xmalloc(len);
66	strlcpy(cp, str, len);
67	return cp;
68}
69