-
Notifications
You must be signed in to change notification settings - Fork 4
/
DateTime.cpp
206 lines (182 loc) · 4.64 KB
/
DateTime.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
//#include <avr/pgmspace.h>
#include "DateTime.h"
#define SECONDS_PER_DAY 86400L
#define SECONDS_FROM_1900_TO_2000 3155673600
#define SECONDS_FROM_1970_TO_2000 946684800
//has to be const or compiler compaints
const uint16_t daysInMonth [] PROGMEM = {31,28,31,30,31,30,31,31,30,31,30,31};
// number of days since 2000/01/01, valid for 2001..2099
static uint16_t date2days(uint16_t y, uint16_t m, uint16_t d) {
if (y >= 2000) {
y -= 2000;
}
uint16_t days = d;
for (uint16_t i = 1; i < m; ++i) {
days += pgm_read_byte(daysInMonth + i - 1);
}
if (m > 2 && y % 4 == 0) {
++days;
}
return days + 365 * y + (y + 3) / 4 - 1;
}
static long time2long(uint16_t days, uint16_t h, uint16_t m, uint16_t s) {
return ((days * 24L + h) * 60 + m) * 60 + s;
}
////////////////////////////////////////////////////////////////////////////////
// DateTime implementation - ignores time zones and DST changes
// NOTE: also ignores leap seconds, see http://en.wikipedia.org/wiki/Leap_second
DateTime::DateTime(uint32_t t, unsigned long microsfraction)
: microsfraction_(microsfraction) {
// bring to 2000 timestamp from 1900
t -= SECONDS_FROM_1900_TO_2000;
second_ = t % 60;
t /= 60;
minute_ = t % 60;
t /= 60;
hour_ = t % 24;
uint16_t days = t / 24;
uint16_t leap;
for (year_ = 0; ; ++year_) {
leap = year_ % 4 == 0;
if (days < 365 + leap) {
break;
}
days -= 365 + leap;
}
for (month_ = 1; ; ++month_) {
uint16_t daysPerMonth = pgm_read_byte(daysInMonth + month_ - 1);
if (leap && month_ == 2) {
++daysPerMonth;
}
if (days < daysPerMonth) {
break;
}
days -= daysPerMonth;
}
day_ = days + 1;
}
void DateTime::time(uint32_t t) {
// bring to 2000 timestamp from 1900
t -= SECONDS_FROM_1900_TO_2000;
second_ = t % 60;
t /= 60;
minute_ = t % 60;
t /= 60;
hour_ = t % 24;
uint16_t days = t / 24;
uint16_t leap;
for (year_ = 0; ; ++year_) {
leap = year_ % 4 == 0;
if (days < 365 + leap) {
break;
}
days -= 365 + leap;
}
for (month_ = 1; ; ++month_) {
uint16_t daysPerMonth = pgm_read_byte(daysInMonth + month_ - 1);
if (leap && month_ == 2) {
++daysPerMonth;
}
if (days < daysPerMonth) {
break;
}
days -= daysPerMonth;
}
day_ = days + 1;
}
DateTime::DateTime(
uint16_t year, uint16_t month,
uint16_t day, uint16_t hour,
uint16_t minute, uint16_t second,
unsigned long microsfraction)
: year_( (year >= 2000) ? year - 2000 : year),
month_(month),
day_(day),
hour_(hour),
minute_(minute),
second_(second),
microsfraction_(microsfraction) {}
static uint16_t conv2d(const char *p) {
uint16_t v = 0;
if ('0' <= *p && *p <= '9') {
v = *p - '0';
}
return 10 * v + *++p - '0';
}
// A convenient constructor for using "the compiler's time":
// DateTime now (__DATE__, __TIME__);
// NOTE: using PSTR would further reduce the RAM footprint
DateTime::DateTime(
const char *date,
const char *time,
unsigned long microsfraction)
: microsfraction_(microsfraction) {
// sample input: date = "Dec 26 2009", time = "12:34:56"
year_ = conv2d(date + 9);
// Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
switch (date[0]) {
case 'J':
month_ = date[1] == 'a' ? 1 : (month_ = date[2] == 'n' ? 6 : 7);
break;
case 'F':
month_ = 2;
break;
case 'A':
month_ = date[2] == 'r' ? 4 : 8;
break;
case 'M':
month_ = date[2] == 'r' ? 3 : 5;
break;
case 'S':
month_ = 9;
break;
case 'O':
month_ = 10;
break;
case 'N':
month_ = 11;
break;
case 'D':
month_ = 12;
break;
default:
break;
}
day_ = conv2d(date + 4);
hour_ = conv2d(time);
minute_ = conv2d(time + 3);
second_ = conv2d(time + 6);
/*uint16_t DateTime::dayOfWeek() const {
uint16_t day = date2days(year_, month_, day_);
// Jan 1, 2000 is a Saturday, i.e. returns 6
return (day + 6) % 7;
*/
}
uint32_t DateTime::ntptime(void) const
{
uint32_t t;
uint16_t days = date2days(year_, month_, day_);
t = time2long(days, hour_, minute_, second_);
t += SECONDS_FROM_1900_TO_2000;
return t;
}
uint32_t DateTime::unixtime(void) const
{
uint32_t t;
uint16_t days = date2days(year_, month_, day_);
t = time2long(days, hour_, minute_, second_);
t += SECONDS_FROM_1970_TO_2000;
return t;
}
String DateTime::toStringTime(void) const
{
char chartime[9];
sprintf(chartime, "%02d:%02d:%02d", hour(), minute(), second() );
return chartime;
}
String DateTime::toStringDate(void) const
{
char charDate[11];
sprintf(charDate, "%02d/%02d/%04d", day(), month(), year() );
return charDate;
}