time-util.c revision a8c5a86d183db25a57bf193c06b41e092ec2e151
/* Copyright (c) 2008-2014 Dovecot authors, see the included COPYING file */
#include "lib.h"
#include "time-util.h"
#include <time.h>
#define STRFTIME_MAX_BUFSIZE (1024*64)
int timeval_cmp(const struct timeval *tv1, const struct timeval *tv2)
{
if (tv1->tv_sec < tv2->tv_sec)
return -1;
if (tv1->tv_sec > tv2->tv_sec)
return 1;
if (tv1->tv_usec < tv2->tv_usec)
return -1;
if (tv1->tv_usec > tv2->tv_usec)
return 1;
return 0;
}
int timeval_diff_msecs(const struct timeval *tv1, const struct timeval *tv2)
{
return timeval_diff_usecs(tv1, tv2) / 1000;
}
long long timeval_diff_usecs(const struct timeval *tv1,
const struct timeval *tv2)
{
time_t secs;
int usecs;
secs = tv1->tv_sec - tv2->tv_sec;
usecs = tv1->tv_usec - tv2->tv_usec;
if (usecs < 0) {
secs--;
usecs += 1000000;
}
return ((long long)secs * 1000000LL) + usecs;
}
const char *t_strflocaltime(const char *fmt, time_t t)
{
const struct tm *tm;
size_t bufsize = strlen(fmt) + 32;
char *buf = t_buffer_get(bufsize);
size_t ret;
tm = localtime(&t);
while ((ret = strftime(buf, bufsize, fmt, tm)) == 0) {
bufsize *= 2;
i_assert(bufsize <= STRFTIME_MAX_BUFSIZE);
buf = t_buffer_get(bufsize);
}
t_buffer_alloc(ret + 1);
return buf;
}