#define calloc_nf(num, sz) calloc_nf_impl(num, sz, __FILE__, __LINE__)
void *calloc_nf_impl(size_t num, size_t sz, const char *file, int line);
#define calloc_nf(num, sz) calloc_nf_impl(num, sz, __FILE__, __LINE__)
void *calloc_nf_impl(size_t num, size_t sz, const char *file, int line);