#ifndef _RTC_H
#define _RTC_H

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <strings.h>

struct rtc_time {
	int tm_sec;
	int tm_min;
	int tm_hour;
	int tm_mday;
	int tm_mon;
	int tm_year;
	int tm_wday;
	int tm_yday;
	int tm_isdst;
};

int rtc_fd;
extern int open_rtc(void)
{
	system("rmmod *.ko");
	system("insmod rtc_dev.ko");
	system("insmod rtc_drv.ko");

	rtc_fd =open("/dev/rtc",O_RDWR);
	if(rtc_fd<0)
	{
		printf("cannot open /dev/rtc!\n");
		return -1;
	}

	return 0;
}

extern char *read_rtc(void)
{
	struct rtc_time read_time;
	static char buf[50];
	int ret;
	ret = read(rtc_fd, &read_time, sizeof(read_time));
	if (ret == 0){
		sprintf(buf, "%d-%d-%d %d:%d:%d", read_time.tm_year, read_time.tm_mon, read_time.tm_mday,
			 read_time.tm_hour, read_time.tm_min, read_time.tm_sec);
	}
	else{
		printf("cannot read!\n");
		return NULL;
	}

	return buf;
}

extern int write_rtc(char *str)
{
	struct rtc_time write_time;
	int ret;
	char input_time[512]= "2012-11-15 10:25:13";
	char *p = NULL;
	int i;
	
	if (str){
		bzero(input_time, 512);
		strcpy(input_time, str);
	}

	p = strtok(input_time, " ");
	p = strtok(NULL, ":");
	for (i = 0; p; i++) {
		*(&write_time.tm_hour-i) = atoi(p);
		p = strtok(NULL, ":");
	}

	p = strtok(input_time, "-");
	for (i = 0; p; i++) {
		*(&write_time.tm_year-i) = atoi(p);
		p = strtok(NULL, "-");
	}

	ret = write(rtc_fd, &write_time, sizeof(write_time));
	if (ret != 0){
		printf("cannot write!\n");
		return -1;
	}

	return 0;
}

#endif