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31652869 | 1 | /* $OpenBSD: xmalloc.c,v 1.27 2006/08/03 03:34:42 deraadt Exp $ */ |
8efc0c15 | 2 | /* |
5260325f | 3 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
4 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland | |
5 | * All rights reserved | |
5260325f | 6 | * Versions of malloc and friends that check their results, and never return |
7 | * failure (they call fatal if they encounter an error). | |
2b87da3b | 8 | * |
bcbf86ec | 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". | |
5260325f | 14 | */ |
8efc0c15 | 15 | |
16 | #include "includes.h" | |
8efc0c15 | 17 | |
536c14e8 | 18 | #include <sys/param.h> |
4c72fcfd | 19 | #include <stdarg.h> |
cf851879 | 20 | #include <stdio.h> |
ffa517a8 | 21 | #include <stdlib.h> |
00146caa | 22 | #include <string.h> |
4c72fcfd | 23 | |
42f11eb2 | 24 | #include "xmalloc.h" |
25 | #include "log.h" | |
8efc0c15 | 26 | |
5260325f | 27 | void * |
28 | xmalloc(size_t size) | |
8efc0c15 | 29 | { |
a2e6d17d | 30 | void *ptr; |
31 | ||
32 | if (size == 0) | |
33 | fatal("xmalloc: zero size"); | |
34 | ptr = malloc(size); | |
5260325f | 35 | if (ptr == NULL) |
a2e6d17d | 36 | fatal("xmalloc: out of memory (allocating %lu bytes)", (u_long) size); |
5260325f | 37 | return ptr; |
8efc0c15 | 38 | } |
39 | ||
52e3daed | 40 | void * |
41 | xcalloc(size_t nmemb, size_t size) | |
42 | { | |
43 | void *ptr; | |
44 | ||
52e3daed | 45 | if (size == 0 || nmemb == 0) |
46 | fatal("xcalloc: zero size"); | |
6a0984b4 | 47 | if (SIZE_T_MAX / nmemb < size) |
48 | fatal("xcalloc: nmemb * size > SIZE_T_MAX"); | |
52e3daed | 49 | ptr = calloc(nmemb, size); |
50 | if (ptr == NULL) | |
51 | fatal("xcalloc: out of memory (allocating %lu bytes)", | |
52 | (u_long)(size * nmemb)); | |
53 | return ptr; | |
54 | } | |
55 | ||
5260325f | 56 | void * |
c5d10563 | 57 | xrealloc(void *ptr, size_t nmemb, size_t size) |
8efc0c15 | 58 | { |
5260325f | 59 | void *new_ptr; |
c5d10563 | 60 | size_t new_size = nmemb * size; |
5260325f | 61 | |
a2e6d17d | 62 | if (new_size == 0) |
63 | fatal("xrealloc: zero size"); | |
6a0984b4 | 64 | if (SIZE_T_MAX / nmemb < size) |
65 | fatal("xrealloc: nmemb * size > SIZE_T_MAX"); | |
5260325f | 66 | if (ptr == NULL) |
764291b3 | 67 | new_ptr = malloc(new_size); |
68 | else | |
69 | new_ptr = realloc(ptr, new_size); | |
5260325f | 70 | if (new_ptr == NULL) |
c5d10563 | 71 | fatal("xrealloc: out of memory (new_size %lu bytes)", |
72 | (u_long) new_size); | |
5260325f | 73 | return new_ptr; |
8efc0c15 | 74 | } |
75 | ||
6ae2364d | 76 | void |
5260325f | 77 | xfree(void *ptr) |
8efc0c15 | 78 | { |
5260325f | 79 | if (ptr == NULL) |
80 | fatal("xfree: NULL pointer given as argument"); | |
81 | free(ptr); | |
8efc0c15 | 82 | } |
83 | ||
5260325f | 84 | char * |
85 | xstrdup(const char *str) | |
8efc0c15 | 86 | { |
bac2ef55 | 87 | size_t len; |
a2e6d17d | 88 | char *cp; |
8efc0c15 | 89 | |
bac2ef55 | 90 | len = strlen(str) + 1; |
a2e6d17d | 91 | cp = xmalloc(len); |
5260325f | 92 | strlcpy(cp, str, len); |
93 | return cp; | |
8efc0c15 | 94 | } |
52e3daed | 95 | |
96 | int | |
97 | xasprintf(char **ret, const char *fmt, ...) | |
98 | { | |
99 | va_list ap; | |
100 | int i; | |
101 | ||
102 | va_start(ap, fmt); | |
103 | i = vasprintf(ret, fmt, ap); | |
104 | va_end(ap); | |
105 | ||
106 | if (i < 0 || *ret == NULL) | |
107 | fatal("xasprintf: could not allocate memory"); | |
108 | ||
109 | return (i); | |
110 | } |