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/*
* (C) Copyright 2014 Leo C. <erbl259-lmu@yahoo.de>
*
* (C) Copyright 2001
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*/
/*
* RTC, Date & Time support: get and set date & time
*/
#include "common.h"
#include <string.h>
#include "time.h"
#include "rtc.h"
#include "command.h"
/*
* simple conversion of two-digit string with error checking
*/
static int cnvrt2 (const char *str, int *valp)
{
int val;
if ((*str < '0') || (*str > '9'))
return (-1);
val = *str - '0';
++str;
if ((*str < '0') || (*str > '9'))
return (-1);
*valp = 10 * val + (*str - '0');
return (0);
}
/*
* Convert date string: MMDDhhmm[[CC]YY][.ss]
*
* Some basic checking for valid values is done, but this will not catch
* all possible error conditions.
*/
int mk_date (const char *datestr, struct tm *tmp)
{
int len, val;
char *ptr;
ptr = strchr (datestr,'.');
len = strlen (datestr);
/* Set seconds */
if (ptr) {
int sec;
*ptr++ = '\0';
if ((len - (ptr - datestr)) != 2)
return (-1);
len = strlen (datestr);
if (cnvrt2 (ptr, &sec))
return (-1);
tmp->tm_sec = sec;
} else {
tmp->tm_sec = 0;
}
if (len == 12) { /* MMDDhhmmCCYY */
int year, century;
if (cnvrt2 (datestr+ 8, ¢ury) ||
cnvrt2 (datestr+10, &year) ) {
return (-1);
}
tmp->tm_year = 100 * century + year - 1900;
} else if (len == 10) { /* MMDDhhmmYY */
int year, century;
century = (tmp->tm_year + 1900) / 100;
if (cnvrt2 (datestr+ 8, &year))
return (-1);
tmp->tm_year = 100 * century + year -1900;
}
switch (len) {
case 8: /* MMDDhhmm */
/* fall thru */
case 10: /* MMDDhhmmYY */
/* fall thru */
case 12: /* MMDDhhmmCCYY */
if (cnvrt2 (datestr+0, &val) ||
val > 12) {
break;
}
tmp->tm_mon = val - 1;
if (cnvrt2 (datestr+2, &val) ||
val > ((tmp->tm_mon==2-1) ? 29 : 31)) {
break;
}
tmp->tm_mday = val;
if (cnvrt2 (datestr+4, &val) ||
val > 23) {
break;
}
tmp->tm_hour = val;
if (cnvrt2 (datestr+6, &val) ||
val > 59) {
break;
}
tmp->tm_min = val;
return (0);
default:
break;
}
return (-1);
}
command_ret_t do_date(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
struct tm t;
char buf[30];
int rc;
command_ret_t rcode = CMD_RET_FAILURE;
(void) cmdtp; (void) flag;
switch (argc) {
case 2: /* set date & time */
/* initialize t with current time */
if(rtc_get(&t) < 0) {
my_puts_P(PSTR("## Get date failed\n"));
break;
} else {
/* insert new date & time */
if (mk_date (argv[1], &t) != 0) {
my_puts_P(PSTR("## Bad date format\n"));
break;
}
time_t time;
time = mk_gmtime(&t);
gmtime_r(&time, &t);
/* and write to RTC */
if(rtc_set(&t) < 0) {
my_puts_P(PSTR("## Set date failed\n"));
break;
}
}
/* FALL TROUGH */
case 1: /* get date & time */
rc = rtc_get(&t);
if (rc >= 0) {
asctime_r(&t, buf);
printf_P(PSTR("%s"), buf);
if (rc == 1)
printf_P(PSTR(" (Invalid)"));
putchar('\n');
rcode = CMD_RET_SUCCESS;
} else {
my_puts_P(PSTR("## Get date failed\n"));
}
break;
default:
rcode = CMD_RET_USAGE;
}
return rcode;
}
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