myvtm/libtoolkit/gettimeofday.h

#ifndef __GETTIMEOFDAY_H__
#define __GETTIMEOFDAY_H__

#pragma once

#include "config.h"

#ifdef __cplusplus
extern "C" {
#endif

#if defined(_MSC_VER) || defined(__BORLANDC__)
#define EPOCHFILETIME (116444736000000000i64)
#else
#define EPOCHFILETIME (116444736000000000LL)
#endif

	/* Epoch base year */
#define EPOCH_YEAR 1970

	/* tm struct members conversion units */
#define TM_YEAR_BASE    1900    /* tm_year base year */
#define TM_MONTH_MIN    0       /* tm_mon = 0 - January */ 
#define TM_MONTH_MAX    11      /* tm_mon = 11 - December */ 

#define MIN_SEC         60                  /* seconds in a minute */
#define HOUR_SEC        3600                /* seconds in an hour */
#define DAY_SEC         86400               /* seconds in a day */
#define YEAR_SEC        (365 * DAY_SEC)     /* seconds in a year */
#define FOUR_YEAR_SEC   (4 * YEAR_SEC + 1)  /* seconds in a 4-year period */

	/*
	In every, 400 year period (greg) is an interval of the same
	number of days: 365 x 400 + 97 = 146097
	Also, there are 97 leap days in every such 400 years interval
	*/
#define LEAP_DAYS_IN_GREG   97
#define GREG_YEARS   400
#define GREG_DAYS    (365 * GREG_YEARS + LEAP_DAYS_IN_GREG)
#define GREG_SECS    (GREG_DAYS * DAY_SEC)

	/* Checks if given year is a leap year. */
#define IS_LEAP_YEAR(year) \
	(((year) % 4) == 0 && (((year) % 100) != 0 || ((year) % 400) == 0))

#ifndef _TIMEZONE_DEFINED 
	struct timezone 
	{ 
		int tz_minuteswest; /* minutes W of Greenwich */ 
		int tz_dsttime;     /* type of dst correction */ 
	}; 
#define _TIMEZONE_DEFINED 
#endif /* _TIMEZONE_DEFINED */ 

TOOLKIT_API int gettimeofday(struct timeval *tp, struct timezone *tzp);

#ifdef __cplusplus
} // extern "C" {
#endif

#endif //__GETTIMEOFDAY_H__