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cloudbase.mooo.com Git - z180-stamp.git/blob - avr/cmd_date.c
2 * (C) Copyright 2014 Leo C. <erbl259-lmu@yahoo.de>
5 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
7 * SPDX-License-Identifier: GPL-2.0
11 * RTC, Date & Time support: get and set date & time
19 * simple conversion of two-digit string with error checking
21 static int cnvrt2 (const char *str
, int *valp
)
25 if ((*str
< '0') || (*str
> '9'))
32 if ((*str
< '0') || (*str
> '9'))
35 *valp
= 10 * val
+ (*str
- '0');
41 * Convert date string: MMDDhhmm[[CC]YY][.ss]
43 * Some basic checking for valid values is done, but this will not catch
44 * all possible error conditions.
46 int mk_date (const char *datestr
, struct tm
*tmp
)
51 ptr
= strchr (datestr
,'.');
52 len
= strlen (datestr
);
59 if ((len
- (ptr
- datestr
)) != 2)
62 len
= strlen (datestr
);
64 if (cnvrt2 (ptr
, &sec
))
72 if (len
== 12) { /* MMDDhhmmCCYY */
75 if (cnvrt2 (datestr
+ 8, ¢ury
) ||
76 cnvrt2 (datestr
+10, &year
) ) {
79 tmp
->tm_year
= 100 * century
+ year
- 1900;
80 } else if (len
== 10) { /* MMDDhhmmYY */
83 century
= (tmp
->tm_year
+ 1900) / 100;
84 if (cnvrt2 (datestr
+ 8, &year
))
86 tmp
->tm_year
= 100 * century
+ year
-1900;
90 case 8: /* MMDDhhmm */
92 case 10: /* MMDDhhmmYY */
94 case 12: /* MMDDhhmmCCYY */
95 if (cnvrt2 (datestr
+0, &val
) ||
99 tmp
->tm_mon
= val
- 1;
100 if (cnvrt2 (datestr
+2, &val
) ||
101 val
> ((tmp
->tm_mon
==2-1) ? 29 : 31)) {
106 if (cnvrt2 (datestr
+4, &val
) ||
112 if (cnvrt2 (datestr
+6, &val
) ||
126 command_ret_t
do_date(cmd_tbl_t
*cmdtp UNUSED
, uint_fast8_t flag UNUSED
, int argc
, char * const argv
[])
131 command_ret_t rcode
= CMD_RET_FAILURE
;
134 case 2: /* set date & time */
135 /* initialize t with current time */
136 if(rtc_get(&t
) < 0) {
137 my_puts_P(PSTR("## Get date failed\n"));
140 /* insert new date & time */
141 if (mk_date (argv
[1], &t
) != 0) {
142 my_puts_P(PSTR("## Bad date format\n"));
147 time
= mk_gmtime(&t
);
150 /* and write to RTC */
151 if(rtc_set(&t
) < 0) {
152 my_puts_P(PSTR("## Set date failed\n"));
157 case 1: /* get date & time */
161 printf_P(PSTR("%s"), buf
);
163 printf_P(PSTR(" (Invalid)"));
165 rcode
= CMD_RET_SUCCESS
;
167 my_puts_P(PSTR("## Get date failed\n"));
172 rcode
= CMD_RET_USAGE
;