Mercurial > irccd
annotate extern/libbsd/reallocarray.c @ 1085:91e3def8c708
irccdctl: fix server-part without reason
| author | David Demelier <markand@malikania.fr> |
|---|---|
| date | Wed, 21 Jul 2021 07:48:41 +0200 |
| parents | 8f26ee9cc6dd |
| children |
| rev | line source |
|---|---|
| 1075 | 1 /* $OpenBSD: reallocarray.c,v 1.3 2015/09/13 08:31:47 guenther Exp $ */ |
| 2 /* | |
| 3 * Copyright (c) 2008 Otto Moerbeek <otto@drijf.net> | |
| 4 * | |
| 5 * Permission to use, copy, modify, and distribute this software for any | |
| 6 * purpose with or without fee is hereby granted, provided that the above | |
| 7 * copyright notice and this permission notice appear in all copies. | |
| 8 * | |
| 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
| 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
| 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
| 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
| 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
| 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
| 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
| 16 */ | |
| 17 | |
| 18 #include <sys/types.h> | |
| 19 #include <errno.h> | |
| 20 #include <stdint.h> | |
| 21 #include <stdlib.h> | |
| 22 | |
| 23 /* | |
| 24 * This is sqrt(SIZE_MAX+1), as s1*s2 <= SIZE_MAX | |
| 25 * if both s1 < MUL_NO_OVERFLOW and s2 < MUL_NO_OVERFLOW | |
| 26 */ | |
| 27 #define MUL_NO_OVERFLOW ((size_t)1 << (sizeof(size_t) * 4)) | |
| 28 | |
| 29 void * | |
|
1079
8f26ee9cc6dd
misc: unconditionnally add BSD->POSIX extensions
David Demelier <markand@malikania.fr>
parents:
1075
diff
changeset
|
30 openbsd_reallocarray(void *optr, size_t nmemb, size_t size) |
| 1075 | 31 { |
| 32 if ((nmemb >= MUL_NO_OVERFLOW || size >= MUL_NO_OVERFLOW) && | |
| 33 nmemb > 0 && SIZE_MAX / nmemb < size) { | |
| 34 errno = ENOMEM; | |
| 35 return NULL; | |
| 36 } | |
| 37 return realloc(optr, size * nmemb); | |
| 38 } |