examples/nbcompat.h


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#ifndef NB_COMPAT_H
#define NB_COMPAT_H

#include <unistd.h> /* for size_t */

#ifndef __arraycount
#define __arraycount(__a) (sizeof(__a) / sizeof((__a)[0]))
#endif

size_t strlcpy(char *, const char *, size_t);

#define timespeccmp(tsp, usp, cmp)                                                                           \
    (((tsp)->tv_sec == (usp)->tv_sec) ? ((tsp)->tv_nsec cmp(usp)->tv_nsec) : ((tsp)->tv_sec cmp(usp)->tv_sec))
#define timespecadd(tsp, usp, vsp)                                                                           \
    do {                                                                                                     \
        (vsp)->tv_sec  = (tsp)->tv_sec + (usp)->tv_sec;                                                      \
        (vsp)->tv_nsec = (tsp)->tv_nsec + (usp)->tv_nsec;                                                    \
        if ((vsp)->tv_nsec >= 1000000000L) {                                                                 \
            (vsp)->tv_sec++;                                                                                 \
            (vsp)->tv_nsec -= 1000000000L;                                                                   \
        }                                                                                                    \
    } while (/* CONSTCOND */ 0)
#define timespecsub(tsp, usp, vsp)                                                                           \
    do {                                                                                                     \
        (vsp)->tv_sec  = (tsp)->tv_sec - (usp)->tv_sec;                                                      \
        (vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec;                                                    \
        if ((vsp)->tv_nsec < 0) {                                                                            \
            (vsp)->tv_sec--;                                                                                 \
            (vsp)->tv_nsec += 1000000000L;                                                                   \
        }                                                                                                    \
    } while (/* CONSTCOND */ 0)
#define timespec2ns(x) (((uint64_t)(x)->tv_sec) * 1000000000L + (x)->tv_nsec)

#endif /* NB_COMPAT_H */