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
27 void *
xmalloc(size_t size)28 xmalloc(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
40 void *
xcalloc(size_t nmemb,size_t size)41 xcalloc(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
54 void *
xrealloc(void * ptr,size_t size)55 xrealloc(void *ptr, size_t size)
56 {
57 return xreallocarray(ptr, 1, size);
58 }
59
60 void *
xreallocarray(void * ptr,size_t nmemb,size_t size)61 xreallocarray(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
74 char *
xstrdup(const char * str)75 xstrdup(const char *str)
76 {
77 char *cp;
78
79 if ((cp = strdup(str)) == NULL)
80 err(1, "xstrdup");
81 return cp;
82 }
83