112 lines
2.7 KiB
C++
112 lines
2.7 KiB
C++
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#include <Arduino.h>
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#include "RtcDateTime.h"
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const uint8_t c_daysInMonth[] PROGMEM = { 31,28,31,30,31,30,31,31,30,31,30,31 };
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RtcDateTime::RtcDateTime(uint32_t secondsFrom2000)
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{
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_initWithSecondsFrom2000<uint32_t>(secondsFrom2000);
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}
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uint8_t StringToUint8(const char* pString)
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{
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uint8_t value = 0;
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// skip leading 0 and spaces
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while ('0' == *pString || *pString == ' ')
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{
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pString++;
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}
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// calculate number until we hit non-numeral char
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while ('0' <= *pString && *pString <= '9')
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{
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value *= 10;
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value += *pString - '0';
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pString++;
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}
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return value;
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}
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RtcDateTime::RtcDateTime(const char* date, const char* time)
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{
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// sample input: date = "Dec 26 2009", time = "12:34:56"
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_yearFrom2000 = StringToUint8(date + 9);
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// Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
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switch (date[0])
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{
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case 'J':
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if ( date[1] == 'a' )
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_month = 1;
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else if ( date[2] == 'n' )
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_month = 6;
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else
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_month = 7;
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break;
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case 'F':
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_month = 2;
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break;
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case 'A':
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_month = date[1] == 'p' ? 4 : 8;
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break;
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case 'M':
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_month = date[2] == 'r' ? 3 : 5;
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break;
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case 'S':
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_month = 9;
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break;
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case 'O':
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_month = 10;
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break;
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case 'N':
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_month = 11;
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break;
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case 'D':
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_month = 12;
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break;
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}
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_dayOfMonth = StringToUint8(date + 4);
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_hour = StringToUint8(time);
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_minute = StringToUint8(time + 3);
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_second = StringToUint8(time + 6);
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}
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template <typename T> T DaysSinceFirstOfYear2000(uint16_t year, uint8_t month, uint8_t dayOfMonth)
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{
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T days = dayOfMonth;
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for (uint8_t indexMonth = 1; indexMonth < month; ++indexMonth)
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{
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days += pgm_read_byte(c_daysInMonth + indexMonth - 1);
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}
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if (month > 2 && year % 4 == 0)
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{
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days++;
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}
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return days + 365 * year + (year + 3) / 4 - 1;
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}
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template <typename T> T SecondsIn(T days, uint8_t hours, uint8_t minutes, uint8_t seconds)
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{
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return ((days * 24L + hours) * 60 + minutes) * 60 + seconds;
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}
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uint8_t RtcDateTime::DayOfWeek() const
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{
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uint16_t days = DaysSinceFirstOfYear2000<uint16_t>(_yearFrom2000, _month, _dayOfMonth);
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return (days + 6) % 7; // Jan 1, 2000 is a Saturday, i.e. returns 6
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}
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uint32_t RtcDateTime::TotalSeconds() const
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{
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uint16_t days = DaysSinceFirstOfYear2000<uint16_t>(_yearFrom2000, _month, _dayOfMonth);
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return SecondsIn<uint32_t>(days, _hour, _minute, _second);
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}
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uint64_t RtcDateTime::TotalSeconds64() const
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{
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uint32_t days = DaysSinceFirstOfYear2000<uint32_t>(_yearFrom2000, _month, _dayOfMonth);
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return SecondsIn<uint64_t>(days, _hour, _minute, _second);
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}
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