lib: Add static inline reallocarray fallback function

Signed-off-by: Mark Wielaard <[email protected]>

1 files changed, 14 insertions, 0 deletions

diff --git a/lib/system.h b/lib/system.h
index cdf18ed7..58d9deee 100644
--- a/lib/system.h
+++ b/lib/system.h
@@ -38,6 +38,7 @@
 #include <byteswap.h>
 #include <unistd.h>
 #include <string.h>
+#include <stdlib.h>
 
 #if __BYTE_ORDER == __LITTLE_ENDIAN
 # define LE32(n)	(n)
@@ -70,6 +71,19 @@
     ((void *) ((char *) memcpy (dest, src, n) + (size_t) n))
 #endif
 
+#if !HAVE_DECL_REALLOCARRAY
+static inline void *
+reallocarray (void *ptr, size_t nmemb, size_t size)
+{
+  if (size > 0 && nmemb > SIZE_MAX / size)
+    {
+      errno = ENOMEM;
+      return NULL;
+    }
+  return realloc (ptr, nmemb * size);
+}
+#endif
+
 /* Return TRUE if the start of STR matches PREFIX, FALSE otherwise.  */
 
 static inline int