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/*
* Common time functions.
*
* Copyright (c) 2007-2009 Marko Kreen, Skype Technologies OÜ
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <usual/time.h>
#include <usual/string.h>
#include <stdio.h>
char *format_time_ms(usec_t time, char *dest, unsigned destlen)
{
struct tm *tm, tmbuf;
struct timeval tv;
time_t sec;
if (!time) {
gettimeofday(&tv, NULL);
} else {
tv.tv_sec = time / USEC;
tv.tv_usec = time % USEC;
}
sec = tv.tv_sec;
tm = localtime_r(&sec, &tmbuf);
snprintf(dest, destlen, "%04d-%02d-%02d %02d:%02d:%02d.%03d %s",
tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec,
(int)(tv.tv_usec / 1000),
tzname[tm->tm_isdst > 0 ? 1 : 0]);
return dest;
}
char *format_time_s(usec_t time, char *dest, unsigned destlen)
{
time_t s;
struct tm tbuf, *tm;
if (!time) {
struct timeval tv;
gettimeofday(&tv, NULL);
s = tv.tv_sec;
} else {
s = time / USEC;
}
tm = localtime_r(&s, &tbuf);
snprintf(dest, destlen, "%04d-%02d-%02d %02d:%02d:%02d %s",
tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec,
tzname[tm->tm_isdst > 0 ? 1 : 0]);
return dest;
}
/* read current time */
usec_t get_time_usec(void)
{
struct timeval tv;
gettimeofday(&tv, NULL);
return (usec_t)tv.tv_sec * USEC + tv.tv_usec;
}
static usec_t _time_cache;
/* read cached time */
usec_t get_cached_time(void)
{
if (!_time_cache)
_time_cache = get_time_usec();
return _time_cache;
}
/* forget cached time, let next read fill it */
void reset_time_cache(void)
{
_time_cache = 0;
}
/*
* win32 compat
*/
#ifdef WIN32
/* unix epoch (1970) in seconds from windows epoch (1601) */
#define UNIX_EPOCH 11644473600LL
/* 1 sec in 100 nsec units */
#define FT_SEC 10000000LL
static void ft2tv(FILETIME *src, struct timeval *dest, bool use_epoch)
{
ULARGE_INTEGER tmp;
tmp.LowPart = src->dwLowDateTime;
tmp.HighPart = src->dwHighDateTime;
dest->tv_sec = (tmp.QuadPart / FT_SEC) - (use_epoch ? UNIX_EPOCH : 0);
dest->tv_usec = (tmp.QuadPart % FT_SEC) / 10;
}
#ifndef HAVE_GETTIMEOFDAY
int gettimeofday(struct timeval * tp, void * tzp)
{
FILETIME file_time;
SYSTEMTIME system_time;
/* read UTC timestamp */
GetSystemTime(&system_time);
SystemTimeToFileTime(&system_time, &file_time);
/* convert to timeval */
ft2tv(&file_time, tp, true);
return 0;
}
#endif /* !HAVE_GETTIMEOFDAY */
#ifndef HAVE_LOCALTIME_R
struct tm *localtime_r(const time_t *tp, struct tm *result)
{
ULARGE_INTEGER utc;
FILETIME ft_utc;
SYSTEMTIME st_utc, st_local;
/* convert time_t to FILETIME */
utc.QuadPart = (*tp + UNIX_EPOCH) * FT_SEC;
ft_utc.dwLowDateTime = utc.LowPart;
ft_utc.dwHighDateTime = utc.HighPart;
/* split to parts and get local time */
if (!FileTimeToSystemTime(&ft_utc, &st_utc))
return NULL;
if (!SystemTimeToTzSpecificLocalTime(NULL, &st_utc, &st_local))
return NULL;
/* fill struct tm */
result->tm_sec = st_local.wSecond;
result->tm_min = st_local.wMinute;
result->tm_hour = st_local.wHour;
result->tm_mday = st_local.wDay;
result->tm_mon = st_local.wMonth - 1;
result->tm_year = st_local.wYear - 1900;
result->tm_wday = st_local.wDayOfWeek;
result->tm_yday = 0;
result->tm_isdst = -1;
return result;
}
#endif /* !HAVE_LOCALTIME_R */
#ifndef HAVE_GETRUSAGE
int getrusage(int who, struct rusage *r_usage)
{
FILETIME tcreate, texit, tkern, tuser;
if (who != RUSAGE_SELF) {
errno = EINVAL;
return -1;
}
if (!GetProcessTimes(GetCurrentProcess(), &tcreate, &texit, &tkern, &tuser))
return -1;
ft2tv(&tuser, &r_usage->ru_utime, false);
ft2tv(&tkern, &r_usage->ru_stime, false);
return 0;
}
#endif /* !HAVE_GETRUSAGE */
#endif /* WIN32 */
#ifndef HAVE_TIMEGM
time_t timegm(struct tm *tm)
{
#ifdef WIN32
return _mkgmtime(tm);
#else
char buf[128], *tz, *old = NULL;
time_t secs;
tz = getenv("TZ");
if (tz) {
old = strdup(tz);
if (!old) {
strlcpy(buf, tz, sizeof buf);
old = buf;
}
}
setenv("TZ", "", 1);
tzset();
secs = mktime(tm);
if (old) {
setenv("TZ", old, 1);
} else {
unsetenv("TZ");
}
tzset();
if (old && old != buf)
free(old);
return secs;
#endif
}
#endif /* HAVE_TIMEGM */
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