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8efc0c15 | 1 | /* |
5260325f | 2 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
3 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland | |
4 | * All rights reserved | |
5260325f | 5 | * Versions of malloc and friends that check their results, and never return |
6 | * failure (they call fatal if they encounter an error). | |
2b87da3b | 7 | * |
bcbf86ec | 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". | |
5260325f | 13 | */ |
8efc0c15 | 14 | |
15 | #include "includes.h" | |
8efc0c15 | 16 | |
42f11eb2 | 17 | #include "xmalloc.h" |
18 | #include "log.h" | |
8efc0c15 | 19 | |
5260325f | 20 | void * |
21 | xmalloc(size_t size) | |
8efc0c15 | 22 | { |
a2e6d17d | 23 | void *ptr; |
24 | ||
25 | if (size == 0) | |
26 | fatal("xmalloc: zero size"); | |
27 | ptr = malloc(size); | |
5260325f | 28 | if (ptr == NULL) |
a2e6d17d | 29 | fatal("xmalloc: out of memory (allocating %lu bytes)", (u_long) size); |
5260325f | 30 | return ptr; |
8efc0c15 | 31 | } |
32 | ||
52e3daed | 33 | void * |
34 | xcalloc(size_t nmemb, size_t size) | |
35 | { | |
36 | void *ptr; | |
37 | ||
c5d10563 | 38 | if (nmemb && size && SIZE_T_MAX / nmemb < size) |
52e3daed | 39 | fatal("xcalloc: nmemb * size > SIZE_T_MAX"); |
40 | if (size == 0 || nmemb == 0) | |
41 | fatal("xcalloc: zero size"); | |
42 | ptr = calloc(nmemb, size); | |
43 | if (ptr == NULL) | |
44 | fatal("xcalloc: out of memory (allocating %lu bytes)", | |
45 | (u_long)(size * nmemb)); | |
46 | return ptr; | |
47 | } | |
48 | ||
5260325f | 49 | void * |
c5d10563 | 50 | xrealloc(void *ptr, size_t nmemb, size_t size) |
8efc0c15 | 51 | { |
5260325f | 52 | void *new_ptr; |
c5d10563 | 53 | size_t new_size = nmemb * size; |
5260325f | 54 | |
c5d10563 | 55 | if (nmemb && size && SIZE_T_MAX / nmemb < size) |
56 | fatal("xrealloc: nmemb * size > SIZE_T_MAX"); | |
a2e6d17d | 57 | if (new_size == 0) |
58 | fatal("xrealloc: zero size"); | |
5260325f | 59 | if (ptr == NULL) |
764291b3 | 60 | new_ptr = malloc(new_size); |
61 | else | |
62 | new_ptr = realloc(ptr, new_size); | |
5260325f | 63 | if (new_ptr == NULL) |
c5d10563 | 64 | fatal("xrealloc: out of memory (new_size %lu bytes)", |
65 | (u_long) new_size); | |
5260325f | 66 | return new_ptr; |
8efc0c15 | 67 | } |
68 | ||
6ae2364d | 69 | void |
5260325f | 70 | xfree(void *ptr) |
8efc0c15 | 71 | { |
5260325f | 72 | if (ptr == NULL) |
73 | fatal("xfree: NULL pointer given as argument"); | |
74 | free(ptr); | |
8efc0c15 | 75 | } |
76 | ||
5260325f | 77 | char * |
78 | xstrdup(const char *str) | |
8efc0c15 | 79 | { |
bac2ef55 | 80 | size_t len; |
a2e6d17d | 81 | char *cp; |
8efc0c15 | 82 | |
bac2ef55 | 83 | len = strlen(str) + 1; |
a2e6d17d | 84 | cp = xmalloc(len); |
5260325f | 85 | strlcpy(cp, str, len); |
86 | return cp; | |
8efc0c15 | 87 | } |
52e3daed | 88 | |
89 | int | |
90 | xasprintf(char **ret, const char *fmt, ...) | |
91 | { | |
92 | va_list ap; | |
93 | int i; | |
94 | ||
95 | va_start(ap, fmt); | |
96 | i = vasprintf(ret, fmt, ap); | |
97 | va_end(ap); | |
98 | ||
99 | if (i < 0 || *ret == NULL) | |
100 | fatal("xasprintf: could not allocate memory"); | |
101 | ||
102 | return (i); | |
103 | } |