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/* time_util.c
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <glib.h>
#include <wsutil/epochs.h>
#include "time_util.h"
#ifndef _WIN32
#include <sys/time.h>
#include <sys/resource.h>
#else
#include <windows.h>
#endif
/* Test if the given year is a leap year */
#define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))
/* converts a broken down date representation, relative to UTC,
* to a timestamp; it uses timegm() if it's available.
* Copied from Glib source gtimer.c
*/
time_t
mktime_utc(struct tm *tm)
{
#ifndef HAVE_TIMEGM
time_t retval;
static const int days_before[] =
{
0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
};
int yr;
if (tm->tm_mon < 0 || tm->tm_mon > 11)
return (time_t) -1;
retval = (tm->tm_year - 70) * 365;
/* count number of leap years */
yr = tm->tm_year + 1900;
if (tm->tm_mon + 1 < 3 && isleap(yr))
yr--;
retval += (((yr / 4) - (yr / 100) + (yr / 400)) - 477); /* 477 = ((1970 / 4) - (1970 / 100) + (1970 / 400)) */
retval += days_before[tm->tm_mon] + tm->tm_mday - 1;
retval = ((((retval * 24) + tm->tm_hour) * 60) + tm->tm_min) * 60 + tm->tm_sec;
return retval;
#else
return timegm(tm);
#endif /* !HAVE_TIMEGM */
}
/* Validate the values in a time_t
* Currently checks tm_year, tm_mon, tm_mday, tm_hour, tm_min, and tm_sec;
* disregards tm_wday, tm_yday, and tm_isdst.
* Use this in situations where you wish to return an error rather than
* normalizing invalid dates; otherwise you could specify, for example,
* 2020-10-40 (to quote the macOS and probably *BSD manual
* page for ctime()/localtime()/mktime()/etc., "October 40
* is changed into November 9").
*/
gboolean
tm_is_valid(struct tm *tm)
{
static const gint8 days_in_month[12] = {
31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
};
if (tm->tm_mon < 0 || tm->tm_mon > 11) {
return FALSE;
}
if (tm->tm_mday < 0 || tm->tm_mday >
((tm->tm_mon == 1 && isleap(tm->tm_year)) ? 29 : days_in_month[tm->tm_mon])) {
return FALSE;
}
if (tm->tm_hour < 0 || tm->tm_hour > 23) {
return FALSE;
}
if (tm->tm_min < 0 || tm->tm_min > 59) {
return FALSE;
}
if (tm->tm_sec < 0 || tm->tm_sec > 60) {
/* 60, not 59, to account for leap seconds */
return FALSE;
}
return TRUE;
}
void get_resource_usage(double *user_time, double *sys_time) {
#ifndef _WIN32
struct rusage ru;
getrusage(RUSAGE_SELF, &ru);
*user_time = ru.ru_utime.tv_sec + (ru.ru_utime.tv_usec / 1000000.0);
*sys_time = ru.ru_stime.tv_sec + (ru.ru_stime.tv_usec / 1000000.0);
#else /* _WIN32 */
HANDLE h_proc = GetCurrentProcess();
FILETIME cft, eft, kft, uft;
ULARGE_INTEGER uli_time;
GetProcessTimes(h_proc, &cft, &eft, &kft, &uft);
uli_time.LowPart = uft.dwLowDateTime;
uli_time.HighPart = uft.dwHighDateTime;
*user_time = uli_time.QuadPart / 10000000.0;
uli_time.LowPart = kft.dwLowDateTime;
uli_time.HighPart = kft.dwHighDateTime;
*sys_time = uli_time.QuadPart / 1000000000.0;
#endif /* _WIN32 */
}
static double last_user_time = 0.0;
static double last_sys_time = 0.0;
void log_resource_usage(gboolean reset_delta, const char *format, ...) {
va_list ap;
GString *log_str = g_string_new("");
double user_time;
double sys_time;
get_resource_usage(&user_time, &sys_time);
if (reset_delta || last_user_time == 0.0) {
last_user_time = user_time;
last_sys_time = sys_time;
}
g_string_append_printf(log_str, "user %.3f +%.3f sys %.3f +%.3f ",
user_time, user_time - last_user_time,
sys_time, sys_time - last_sys_time);
va_start(ap, format);
g_string_append_vprintf(log_str, format, ap);
va_end(ap);
g_warning("%s", log_str->str);
g_string_free(log_str, TRUE);
}
/* Copied from pcapio.c pcapng_write_interface_statistics_block()*/
guint64
create_timestamp(void) {
guint64 timestamp;
#ifdef _WIN32
FILETIME now;
#else
struct timeval now;
#endif
#ifdef _WIN32
/*
* Current time, represented as 100-nanosecond intervals since
* January 1, 1601, 00:00:00 UTC.
*
* I think DWORD might be signed, so cast both parts of "now"
* to guint32 so that the sign bit doesn't get treated specially.
*
* Windows 8 provides GetSystemTimePreciseAsFileTime which we
* might want to use instead.
*/
GetSystemTimeAsFileTime(&now);
timestamp = (((guint64)(guint32)now.dwHighDateTime) << 32) +
(guint32)now.dwLowDateTime;
/*
* Convert to same thing but as 1-microsecond, i.e. 1000-nanosecond,
* intervals.
*/
timestamp /= 10;
/*
* Subtract difference, in microseconds, between January 1, 1601
* 00:00:00 UTC and January 1, 1970, 00:00:00 UTC.
*/
timestamp -= EPOCH_DELTA_1601_01_01_00_00_00_UTC*1000000;
#else
/*
* Current time, represented as seconds and microseconds since
* January 1, 1970, 00:00:00 UTC.
*/
gettimeofday(&now, NULL);
/*
* Convert to delta in microseconds.
*/
timestamp = (guint64)(now.tv_sec) * 1000000 +
(guint64)(now.tv_usec);
#endif
return timestamp;
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/
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