utils: provide array allocation wrapper

This will be used for allocating memory for arrays
in heap instead of keeping them on stack.

Signed-off-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Signed-off-by: Florian Westphal <fw@strlen.de>

1 files changed, 11 insertions, 0 deletions

diff --git a/src/utils.c b/src/utils.c
index 65dabf41..47f5b791 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -39,6 +39,17 @@ void *xmalloc(size_t size)
 	return ptr;
 }
 
+void *xmalloc_array(size_t nmemb, size_t size)
+{
+	assert(size != 0);
+	assert(nmemb != 0);
+
+	if (nmemb > SIZE_MAX / size)
+		memory_allocation_error();
+
+	return xmalloc(nmemb * size);
+}
+
 void *xrealloc(void *ptr, size_t size)
 {
 	ptr = realloc(ptr, size);