diff options
Diffstat (limited to 'compat_reallocarray.c')
| -rw-r--r-- | compat_reallocarray.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/compat_reallocarray.c b/compat_reallocarray.c index 6e96a6ab7d7e..66151904257d 100644 --- a/compat_reallocarray.c +++ b/compat_reallocarray.c @@ -6,7 +6,8 @@ int dummy; #else -/* $OpenBSD: malloc.c,v 1.158 2014/04/23 15:07:27 tedu Exp $ */ +/* $Id: compat_reallocarray.c,v 1.4 2014/12/11 09:05:01 schwarze Exp $ */ +/* $OpenBSD: reallocarray.c,v 1.2 2014/12/08 03:45:00 bcook Exp $ */ /* * Copyright (c) 2008 Otto Moerbeek <otto@drijf.net> * @@ -22,12 +23,17 @@ int dummy; * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ + #include <sys/types.h> #include <errno.h> #include <stdint.h> #include <stdlib.h> -#define MUL_NO_OVERFLOW (1UL << (sizeof(size_t) * 4)) +/* + * This is sqrt(SIZE_MAX+1), as s1*s2 <= SIZE_MAX + * if both s1 < MUL_NO_OVERFLOW and s2 < MUL_NO_OVERFLOW + */ +#define MUL_NO_OVERFLOW ((size_t)1 << (sizeof(size_t) * 4)) void * reallocarray(void *optr, size_t nmemb, size_t size) |