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add some checks

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This commit is contained in:
okan 2012-11-16 14:15:48 +00:00
parent 7b00e3fe76
commit 93f64ffc55
1 changed files with 7 additions and 0 deletions
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7
xmalloc.c
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@ -23,6 +23,7 @@
#include <err.h> #include <err.h>
#include <errno.h> #include <errno.h>
#include <stdint.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
@ -35,6 +36,8 @@ xmalloc(size_t siz)
{ {
void *p; void *p;
if (siz == 0)
errx(1, "xmalloc: zero size");
if ((p = malloc(siz)) == NULL) if ((p = malloc(siz)) == NULL)
err(1, "malloc"); err(1, "malloc");
@ -46,6 +49,10 @@ xcalloc(size_t no, size_t siz)
{ {
void *p; void *p;
if (siz == 0 || no == 0)
errx(1, "xcalloc: zero size");
if (SIZE_MAX / no < siz)
errx(1, "xcalloc: no * siz > SIZE_MAX");
if ((p = calloc(no, siz)) == NULL) if ((p = calloc(no, siz)) == NULL)
err(1, "calloc"); err(1, "calloc");