get_date_time.c
//
// time_t time( time_t * tloc );
// struct tm *localtime(const time_t *timep);
// struct tm *localtime_r(const time_t *timep, struct tm *result);
// int gettimeofday(struct timeval *tv, struct timezone *tz);
//
// struct tm {
// int tm_sec; /* seconds */
// int tm_min; /* minutes */
// int tm_hour; /* hours */
// int tm_mday; /* day of the month */
// int tm_mon; /* month */
// int tm_year; /* year */
// int tm_wday; /* day of the week */
// int tm_yday; /* day in the year */
// int tm_isdst; /* daylight saving time */
// };
//
// struct timeval {
// long tv_sec; /* seconds*/
// long tv_usec; /* micro seconds */
// };
//
// struct timezone {
// int tz_minuteswest;
// int tz_dsttime;
// };
//
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
/********************************************************************************/
long fnGetNowSysDate_time_localtime(void);
long fnGetNowSysTime_time_localtime(void);
long fnGetNowSysDate_time_localtime_r(void);
long fnGetNowSysTime_time_localtime_r(void);
long fnGetNowSysDate_gettimeofday_localtime_r(void);
long fnGetNowSysTime_gettimeofday_localtime_r(void);
/********************************************************************************/
int main(int argc, char *argv[])
{
long nlNowSysDate = 0;
long nlNowSysTime = 0;
nlNowSysDate = fnGetNowSysDate_time_localtime();
nlNowSysTime = fnGetNowSysTime_time_localtime();
fprintf(stdout, "%08ld %06ld\n", nlNowSysDate, nlNowSysTime);
nlNowSysDate = fnGetNowSysDate_time_localtime_r();
nlNowSysTime = fnGetNowSysTime_time_localtime_r();
fprintf(stdout, "%08ld %06ld\n", nlNowSysDate, nlNowSysTime);
nlNowSysDate = fnGetNowSysDate_gettimeofday_localtime_r();
nlNowSysTime = fnGetNowSysTime_gettimeofday_localtime_r();
fprintf(stdout, "%08ld %06ld\n", nlNowSysDate, nlNowSysTime);
return 1;
}
/********************************************************************************/
long fnGetNowSysDate_time_localtime(void)
{
time_t now;
struct tm *pLocalTime;
register long x;
/* get current date time */
time(&now);
pLocalTime = localtime(&now);
/* get date */
x = (1900 + pLocalTime->tm_year) * 10000L + (pLocalTime->tm_mon+1) * 100L + pLocalTime->tm_mday;
return(x);
}
/********************************************************************************/
long fnGetNowSysTime_time_localtime(void)
{
time_t now;
struct tm *pLocalTime;
register long x;
/* get current date time */
time(&now);
pLocalTime = localtime(&now);
/* get time */
x = pLocalTime->tm_hour * 10000L + pLocalTime->tm_min * 100L + pLocalTime->tm_sec;
return(x);
}
/********************************************************************************/
long fnGetNowSysDate_time_localtime_r(void)
{
time_t now;
struct tm stLocalTimeR;
register long x;
/* get current date time */
time(&now);
localtime_r(&now, &stLocalTimeR);
/* get date */
x = (1900 + stLocalTimeR.tm_year) * 10000L + (stLocalTimeR.tm_mon + 1) * 100L + stLocalTimeR.tm_mday;
return(x);
}
/********************************************************************************/
long fnGetNowSysTime_time_localtime_r(void)
{
time_t now;
struct tm stLocalTimeR;
register long x;
/* get current date time */
time(&now);
localtime_r(&now, &stLocalTimeR);
/* get time */
x = stLocalTimeR.tm_hour * 10000L + stLocalTimeR.tm_min * 100L + stLocalTimeR.tm_sec;
return(x);
}
/********************************************************************************/
long fnGetNowSysDate_gettimeofday_localtime_r(void)
{
struct timeval tv_now;
struct tm stLocalTimeR;
register long x;
/* get current date time */
gettimeofday( &tv_now, NULL );
localtime_r(&tv_now.tv_sec, &stLocalTimeR);
/* get date */
x = (1900 + stLocalTimeR.tm_year) * 10000L + (stLocalTimeR.tm_mon + 1) * 100L + stLocalTimeR.tm_mday;
return(x);
}
/********************************************************************************/
long fnGetNowSysTime_gettimeofday_localtime_r(void)
{
struct timeval tv_now;
struct tm stLocalTimeR;
register long x;
/* get current date time */
gettimeofday( &tv_now, NULL );
localtime_r(&tv_now.tv_sec, &stLocalTimeR);
/* get time */
x = stLocalTimeR.tm_hour * 10000L + stLocalTimeR.tm_min * 100L + stLocalTimeR.tm_sec;
return(x);
}
/********************************************************************************/
