.TH "KDK_SYSTEM_GET_LONGFORMAT" 3 "Tue Sep 19 2023" "Linux Programmer's Manual" \"
.SH NAME
kdk_system_get_longformat - 获取当前的长日期格式
.SH SYNOPSIS
.nf
.B #include <libkydate.h>
.sp
.BI "extern char* kdk_system_get_longformat();" 
.sp
Link with \fI\-lkydate\fP.
.SH "Detailed Description"
The main function of this interface is to obtain the current long date format.
.PP
.SH "RETURN VALUE"
On success, returns current long date format with type of char *; The returned string needs to be released by
.I free
.
.PP
On error, return
.BR NULL.
.SH EXAMPLES
.EX
#include "libkydate.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <stdlib.h>
#include <glib.h>
#include <glib-object.h>

int main()
{
	int ret = kdk_system_set_long_dateformat("2230年3月4日");
	ret = kdk_system_set_short_dateformat("22/5/3");

	char *ld = kdk_system_get_longformat_date();
	printf("long res = %s\n", ld);
	free(ld);
	
	char *sd = kdk_system_get_shortformat_date();
	printf("short res = %s\n", sd);
	free(sd);

	char *ll = kdk_system_get_longformat();
	printf("longformat = %s\n", ll);
	free(ll);

	char *ss = kdk_system_get_shortformat();
	printf("shortformat = %s\n", ss);
	free(ss);

	struct tm ptr;
	
	ptr.tm_year = 2322;
	ptr.tm_mon = 9;
	ptr.tm_mday = 3;

	char *lt = kdk_system_longformat_transform(&ptr);
	printf("longformat_transform = %s\n", lt);
	free(lt);

	ptr.tm_year = 2022;
	ptr.tm_mon = 3;
	ptr.tm_mday = 2;

	char *st = kdk_system_shortformat_transform(&ptr);
	printf("shortformat_transform = %s\n", st);
	free(st);

	kdk_logn_dateinfo *info = kdk_system_login_lock_dateinfo("szm");
	printf("date = %s,time = %s,week = %s\n",info->date,info->time,info->week);
	kdk_free_logn_dateinfo(info);

	ptr.tm_hour = 19;
	ptr.tm_min = 3;
	ptr.tm_sec = 2;
	kdk_timeinfo *ti = kdk_system_timeformat_transform(&ptr);
	printf("time = %s, timesec = %s\n", ti->time, ti->timesec);
	kdk_free_timeinfo(ti);

    return 0;
}

.SH "CONFORMING TO"
These functions are as per the withdrawn POSIX.1e draft specification.
The following functions are Linux extensions:
.BR kdk_system_get_dateformat (),
.BR kdk_system_set_dateformat (),
.BR kdk_system_set_24_timeformat (),
.BR kdk_system_set_12_timeformat (),
.BR kdk_system_get_now_dateformat (),
.BR kdk_system_get_now_timeformat (),
.BR kdk_system_tran_dateformat (),
.BR kdk_system_nowtime (),
.BR kdk_system_nowdate (),
.BR kdk_system_shortweek (),
.BR kdk_system_longweek (),
.BR kdk_system_second (),
.BR kdk_system_logn_dateinfo (),
.BR kdk_system_gjx_time (),
.BR kdk_date_freeall (),
.BR kdk_free_dateinfo (),
.BR kdk_free_logn_dateinfo (),
.BR kdk_system_set_long_dateformat (),
.BR kdk_system_set_short_dateformat (),
.BR kdk_system_get_longformat_date (),
.BR kdk_system_get_shortformat_date (),
.BR kdk_system_get_shortformat (),
.BR kdk_system_longformat_transform (),
.BR kdk_system_shortformat_transform (),
.BR kdk_system_login_lock_dateinfo (),
.BR kdk_system_timeformat_transform ()
and
.BR kdk_free_timeinfo ().

.SH "SEE ALSO"
.BR kdk_system_get_dateformat (3),
.BR kdk_system_set_dateformat (3),
.BR kdk_system_set_24_timeformat (3),
.BR kdk_system_set_12_timeformat (3),
.BR kdk_system_get_now_dateformat (3),
.BR kdk_system_get_now_timeformat (3),
.BR kdk_system_tran_dateformat (3),
.BR kdk_system_nowtime (3),
.BR kdk_system_nowdate (3),
.BR kdk_system_shortweek (3),
.BR kdk_system_longweek (3),
.BR kdk_system_second (3),
.BR kdk_system_logn_dateinfo (3),
.BR kdk_system_gjx_time (3),
.BR kdk_date_freeall (3),
.BR kdk_free_dateinfo (3),
.BR kdk_free_logn_dateinfo (3),
.BR kdk_system_set_long_dateformat (3),
.BR kdk_system_set_short_dateformat (3),
.BR kdk_system_get_longformat_date (3),
.BR kdk_system_get_shortformat_date (3),
.BR kdk_system_get_shortformat (3),
.BR kdk_system_longformat_transform (3),
.BR kdk_system_shortformat_transform (3),
.BR kdk_system_login_lock_dateinfo (3),
.BR kdk_system_timeformat_transform (3)
and
.BR kdk_free_timeinfo (3).