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open5gs/lib/core/src/unix/time.c

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6.5 KiB
C
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#include "core.h"
#include "core_time.h"
static c_int32_t get_offset(struct tm *tm)
{
#if defined(HAVE_STRUCT_TM_TM_GMTOFF)
return tm->tm_gmtoff;
#elif defined(HAVE_STRUCT_TM___TM_GMTOFF)
return tm->__tm_gmtoff;
#else
#error cannot support tm->tm_gmtoff
#endif
}
status_t time_ansi_put(c_time_t *result, time_t input)
{
*result = (c_time_t)input * USEC_PER_SEC;
return CORE_OK;
}
/* NB NB NB NB This returns GMT!!!!!!!!!! */
c_time_t time_now(void)
{
struct timeval tv;
gettimeofday(&tv, NULL);
return tv.tv_sec * USEC_PER_SEC + tv.tv_usec;
}
void core_sleep(c_time_t t)
{
#ifdef OS2
DosSleep(t/1000);
#elif defined(BEOS)
snooze(t);
#elif defined(NETWARE)
delay(t/1000);
#else
struct timeval tv;
tv.tv_usec = t % USEC_PER_SEC;
tv.tv_sec = t / USEC_PER_SEC;
select(0, NULL, NULL, NULL, &tv);
#endif
}
static void explode_time(time_exp_t *xt, c_time_t t,
c_int32_t offset, int use_localtime)
{
struct tm tm;
time_t tt = (t / USEC_PER_SEC) + offset;
xt->tm_usec = t % USEC_PER_SEC;
#if defined (_POSIX_THREAD_SAFE_FUNCTIONS)
if (use_localtime)
localtime_r(&tt, &tm);
else
gmtime_r(&tt, &tm);
#else
if (use_localtime)
tm = *localtime(&tt);
else
tm = *gmtime(&tt);
#endif
xt->tm_sec = tm.tm_sec;
xt->tm_min = tm.tm_min;
xt->tm_hour = tm.tm_hour;
xt->tm_mday = tm.tm_mday;
xt->tm_mon = tm.tm_mon;
xt->tm_year = tm.tm_year;
xt->tm_wday = tm.tm_wday;
xt->tm_yday = tm.tm_yday;
xt->tm_isdst = tm.tm_isdst;
xt->tm_gmtoff = get_offset(&tm);
}
status_t time_exp_tz(time_exp_t *result,
c_time_t input, c_int32_t offs)
{
explode_time(result, input, offs, 0);
result->tm_gmtoff = offs;
return CORE_OK;
}
status_t time_exp_gmt(time_exp_t *result, c_time_t input)
{
return time_exp_tz(result, input, 0);
}
status_t time_exp_lt(time_exp_t *result, c_time_t input)
{
#if defined(__EMX__)
/* EMX gcc (OS/2) has a timezone global we can use */
return time_exp_tz(result, input, -timezone);
#else
explode_time(result, input, 0, 1);
return CORE_OK;
#endif /* __EMX__ */
}
status_t time_exp_get(c_time_t *t, time_exp_t *xt)
{
time_t year = xt->tm_year;
time_t days;
static const int dayoffset[12] =
{306, 337, 0, 31, 61, 92, 122, 153, 184, 214, 245, 275};
/* shift new year to 1st March in order to make leap year calc easy */
if (xt->tm_mon < 2)
year--;
/* Find number of days since 1st March 1900 (in the Gregorian calendar). */
days = year * 365 + year / 4 - year / 100 + (year / 100 + 3) / 4;
days += dayoffset[xt->tm_mon] + xt->tm_mday - 1;
days -= 25508; /* 1 jan 1970 is 25508 days since 1 mar 1900 */
days = ((days * 24 + xt->tm_hour) * 60 + xt->tm_min) * 60 + xt->tm_sec;
if (days < 0) {
return CORE_EBADDATE;
}
*t = days * USEC_PER_SEC + xt->tm_usec;
return CORE_OK;
}
status_t time_exp_gmt_get(c_time_t *t,
time_exp_t *xt)
{
status_t status = time_exp_get(t, xt);
if (status == CORE_OK)
*t -= (time_t) xt->tm_gmtoff * USEC_PER_SEC;
return status;
}
const char month_snames[12][4] =
{
"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};
const char day_snames[7][4] =
{
"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
};
status_t rfc822_date(char *date_str, c_time_t t)
{
time_exp_t xt;
const char *s;
int real_year;
time_exp_gmt(&xt, t);
/* example: "Sat, 08 Jan 2000 18:31:41 GMT" */
/* 12345678901234567890123456789 */
s = &day_snames[xt.tm_wday][0];
*date_str++ = *s++;
*date_str++ = *s++;
*date_str++ = *s++;
*date_str++ = ',';
*date_str++ = ' ';
*date_str++ = xt.tm_mday / 10 + '0';
*date_str++ = xt.tm_mday % 10 + '0';
*date_str++ = ' ';
s = &month_snames[xt.tm_mon][0];
*date_str++ = *s++;
*date_str++ = *s++;
*date_str++ = *s++;
*date_str++ = ' ';
real_year = 1900 + xt.tm_year;
/* This routine isn't y10k ready. */
*date_str++ = real_year / 1000 + '0';
*date_str++ = real_year % 1000 / 100 + '0';
*date_str++ = real_year % 100 / 10 + '0';
*date_str++ = real_year % 10 + '0';
*date_str++ = ' ';
*date_str++ = xt.tm_hour / 10 + '0';
*date_str++ = xt.tm_hour % 10 + '0';
*date_str++ = ':';
*date_str++ = xt.tm_min / 10 + '0';
*date_str++ = xt.tm_min % 10 + '0';
*date_str++ = ':';
*date_str++ = xt.tm_sec / 10 + '0';
*date_str++ = xt.tm_sec % 10 + '0';
*date_str++ = ' ';
*date_str++ = 'G';
*date_str++ = 'M';
*date_str++ = 'T';
*date_str++ = 0;
return CORE_OK;
}
status_t core_ctime(char *date_str, c_time_t t)
{
time_exp_t xt;
const char *s;
int real_year;
/* example: "Wed Jun 30 21:49:08 1993" */
/* 123456789012345678901234 */
time_exp_lt(&xt, t);
s = &day_snames[xt.tm_wday][0];
*date_str++ = *s++;
*date_str++ = *s++;
*date_str++ = *s++;
*date_str++ = ' ';
s = &month_snames[xt.tm_mon][0];
*date_str++ = *s++;
*date_str++ = *s++;
*date_str++ = *s++;
*date_str++ = ' ';
*date_str++ = xt.tm_mday / 10 + '0';
*date_str++ = xt.tm_mday % 10 + '0';
*date_str++ = ' ';
*date_str++ = xt.tm_hour / 10 + '0';
*date_str++ = xt.tm_hour % 10 + '0';
*date_str++ = ':';
*date_str++ = xt.tm_min / 10 + '0';
*date_str++ = xt.tm_min % 10 + '0';
*date_str++ = ':';
*date_str++ = xt.tm_sec / 10 + '0';
*date_str++ = xt.tm_sec % 10 + '0';
*date_str++ = ' ';
real_year = 1900 + xt.tm_year;
*date_str++ = real_year / 1000 + '0';
*date_str++ = real_year % 1000 / 100 + '0';
*date_str++ = real_year % 100 / 10 + '0';
*date_str++ = real_year % 10 + '0';
*date_str++ = 0;
return CORE_OK;
}
status_t core_strftime(char *s, size_t *retsize, size_t max,
const char *format, time_exp_t *xt)
{
struct tm tm;
memset(&tm, 0, sizeof tm);
tm.tm_sec = xt->tm_sec;
tm.tm_min = xt->tm_min;
tm.tm_hour = xt->tm_hour;
tm.tm_mday = xt->tm_mday;
tm.tm_mon = xt->tm_mon;
tm.tm_year = xt->tm_year;
tm.tm_wday = xt->tm_wday;
tm.tm_yday = xt->tm_yday;
tm.tm_isdst = xt->tm_isdst;
#if defined(HAVE_STRUCT_TM_TM_GMTOFF)
tm.tm_gmtoff = xt->tm_gmtoff;
#elif defined(HAVE_STRUCT_TM___TM_GMTOFF)
tm.__tm_gmtoff = xt->tm_gmtoff;
#endif
(*retsize) = strftime(s, max, format, &tm);
return CORE_OK;
}
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