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irmc/src/util.c

58 lines
1.1 KiB

#include "util.h"
/* portable time, as listed in https://gist.github.com/jbenet/1087739 */
void current_utc_time(struct timespec *ts) {
#ifdef __MACH__ // OS X does not have clock_gettime, use clock_get_time
clock_serv_t cclock;
mach_timespec_t mts;
host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &cclock);
clock_get_time(cclock, &mts);
mach_port_deallocate(mach_task_self(), cclock);
ts->tv_sec = mts.tv_sec;
ts->tv_nsec = mts.tv_nsec;
#else
clock_gettime(CLOCK_REALTIME, ts);
#endif
}
/* a better clock() in milliseconds */
long fastclock(void)
{
struct timespec t;
long r;
current_utc_time (&t);
r = t.tv_sec * 1000;
r = r + t.tv_nsec / 1000000;
return r;
}
int kbhit (void)
{
struct timeval tv;
fd_set rdfs;
tv.tv_sec = 0;
tv.tv_usec = 0;
FD_ZERO(&rdfs);
FD_SET (STDIN_FILENO, &rdfs);
select (STDIN_FILENO+1, &rdfs, NULL, NULL, &tv);
return FD_ISSET(STDIN_FILENO, &rdfs);
}
/* get sockaddr, IPv4 or IPv6: */
void *get_in_addr(struct sockaddr *sa)
{
if (sa->sa_family == AF_INET) {
return &(((struct sockaddr_in*)sa)->sin_addr);
}
return &(((struct sockaddr_in6*)sa)->sin6_addr);
}