#if sizeof(uintptr_t) == 4
#    define UINTPTR_C(p) UINT32_C(p)
#elif sizeof(uintptr_t) == 8
#    define UINTPTR_C(p) UINT64_C(p)
#else
#    error uintptr_t size not handled.
#endif

#if sizeof(uintptr_t) == sizeof(unsigned)
#    define UINTPTRxf "x"
#if sizeof(uintptr_t) == sizeof(unsigned long)
#    define UINTPTRxf "lx"
#if sizeof(uintptr_t) == sizeof(unsigned long long)
#    define UINTPTRxf "Lx"
#else
#    error uintptr_t size not handled.
#endif