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#include "reallocarray.h"
#define MUL_NO_OVERFLOW ((size_t)1 << (sizeof(size_t) * 4))
void *reallocarray(void *optr, size_t nmemb, size_t size) {
if ((nmemb >= MUL_NO_OVERFLOW || size >= MUL_NO_OVERFLOW) &&
nmemb > 0 && SIZE_MAX / nmemb < size) {
errno = ENOMEM;
return NULL;
}
return realloc(optr, size * nmemb);
}
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