/** * apr tutorial sample code * http://dev.ariel-networks.com/apr/ */#ifdef HAVE_CONFIG_H#include <config.h>#endif#include <stdio.h>#include <stdlib.h>#include <assert.h>#include <apr_general.h>#include <apr_time.h>static void format_to_struct(apr_time_t t){    apr_time_exp_t tm;    apr_time_t t2;            apr_time_exp_gmt(&tm, t);    printf("GMT: tm.hour = %d, tm.min = %d, tm.sec = %d\n", tm.tm_hour, tm.tm_min, tm.tm_sec);    apr_time_exp_lt(&tm, t);    printf("local: tm.hour = %d, tm.min = %d, tm.sec = %d\n", tm.tm_hour, tm.tm_min, tm.tm_sec);    /* reverse convert */    apr_time_exp_gmt_get(&t2, &tm);/* from tm to t2 */    assert(t == t2);}static void format_to_string(apr_time_t t){    char rbuf[APR_RFC822_DATE_LEN + 1];    char cbuf[APR_CTIME_LEN + 1];            apr_rfc822_date(rbuf, t);    printf("apr_rfc822_date: %s\n", rbuf);    apr_ctime(cbuf, t);    printf("apr_ctime: %s\n", cbuf);}/** * time-APIs sample code * @remark Error checks omitted */int main(int argc, const char *argv[]){    apr_pool_t *mp;    apr_time_t t;            apr_initialize();    apr_pool_create(&mp, NULL);    /* get the current time (elapsed time from epoch(1970/1/1) in micro-second) */    t = apr_time_now();    printf("The current time: %" APR_TIME_T_FMT "[us]\n", t);    printf("The current time: %" APR_TIME_T_FMT "[ms]\n", apr_time_as_msec(t));    printf("The current time: %" APR_TIME_T_FMT "[s]\n", apr_time_sec(t));    /* format the time */    format_to_struct(t);    format_to_string(t);    apr_terminate();    return 0;}