Julien Castello / FrenchTime

Calcule le décalage horaire en France (+1 en été, +2 en hiver) à partir d'une heure UTC et d'une date.

Fork of FrenchTime by Julien Castello

FrenchTime.cpp@6:803a1cf4eb73, 2016-11-23 (annotated)

Committer:
Marcus_2B
Date:
Wed Nov 23 14:46:23 2016 +0000
Revision:
6:803a1cf4eb73
Parent:
5:cf036371055d 
Publish 1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Marcus_2B 0:2ef6fb83757c 1 #include "FrenchTime.h"
Marcus_2B 0:2ef6fb83757c 2
Marcus_2B 0:2ef6fb83757c 3
Marcus_2B 0:2ef6fb83757c 4
Marcus_2B 0:2ef6fb83757c 5
Marcus_2B 0:2ef6fb83757c 6 uint8_t FrenchTime::frenchTimeOffset(uint8_t day, uint8_t month, int year)
Marcus_2B 0:2ef6fb83757c 7 {
Marcus_2B 0:2ef6fb83757c 8 //Avril, Mai, Juin, Juillet, Aout, Septembre
Marcus_2B 0:2ef6fb83757c 9 if (month > MARS && month < OCTOBRE) {
Marcus_2B 0:2ef6fb83757c 10 return UTC_TIME_OFFSET + 1;
Marcus_2B 0:2ef6fb83757c 11 }
Marcus_2B 0:2ef6fb83757c 12 // Janvier, Février, Novembre, Décembre
Marcus_2B 0:2ef6fb83757c 13 else if (month < MARS || month > OCTOBRE) {
Marcus_2B 0:2ef6fb83757c 14 return UTC_TIME_OFFSET;
Marcus_2B 0:2ef6fb83757c 15 }
Marcus_2B 0:2ef6fb83757c 16 //Mars ou Octobre
Marcus_2B 0:2ef6fb83757c 17 else {
Marcus_2B 0:2ef6fb83757c 18 if (MARS == month) {
Marcus_2B 0:2ef6fb83757c 19 if (day >= lastSundayOfMonth(month, year)) {
Marcus_2B 0:2ef6fb83757c 20 return UTC_TIME_OFFSET + 1;
Marcus_2B 0:2ef6fb83757c 21 }
Marcus_2B 0:2ef6fb83757c 22 }
Marcus_2B 0:2ef6fb83757c 23 //OCTOBRE
Marcus_2B 0:2ef6fb83757c 24 else {
Marcus_2B 0:2ef6fb83757c 25 if (day < lastSundayOfMonth(month, year)) {
Marcus_2B 0:2ef6fb83757c 26 return UTC_TIME_OFFSET + 1;
Marcus_2B 0:2ef6fb83757c 27 }
Marcus_2B 0:2ef6fb83757c 28 }
Marcus_2B 0:2ef6fb83757c 29 return UTC_TIME_OFFSET;
Marcus_2B 0:2ef6fb83757c 30 }
Marcus_2B 0:2ef6fb83757c 31 }
Marcus_2B 0:2ef6fb83757c 32
Marcus_2B 0:2ef6fb83757c 33
Marcus_2B 0:2ef6fb83757c 34
Marcus_2B 0:2ef6fb83757c 35 uint8_t FrenchTime::lastSundayOfMonth(uint8_t m, int y)
Marcus_2B 0:2ef6fb83757c 36 {
Marcus_2B 0:2ef6fb83757c 37 for (uint8_t d = DAYS_IN_MARS; d >= 1; d--) {
Marcus_2B 0:2ef6fb83757c 38
Marcus_2B 0:2ef6fb83757c 39 if (FrenchTime::dayOfWeek(d, m, y) == 0) {
Marcus_2B 0:2ef6fb83757c 40 return d;
Marcus_2B 0:2ef6fb83757c 41 }
Marcus_2B 0:2ef6fb83757c 42 }
Marcus_2B 0:2ef6fb83757c 43 return 0;
Marcus_2B 0:2ef6fb83757c 44 }
Marcus_2B 0:2ef6fb83757c 45
Marcus_2B 0:2ef6fb83757c 46
Marcus_2B 0:2ef6fb83757c 47
Marcus_2B 0:2ef6fb83757c 48 uint8_t FrenchTime::dayOfWeek(uint8_t d, uint8_t m, int y)
Marcus_2B 0:2ef6fb83757c 49 {
Marcus_2B 5:cf036371055d 50 //Algorithme de Mike Keith
Marcus_2B 5:cf036371055d 51 int weekDay = 0, z = 0;
Marcus_2B 0:2ef6fb83757c 52
Marcus_2B 0:2ef6fb83757c 53 if (m >= 3) {
Marcus_2B 5:cf036371055d 54 z = y;
Marcus_2B 5:cf036371055d 55 weekDay = (((23 * m) / 9) + d + 4 + y + (z / 4) - (z / 100) + (z / 400) - 2) % 7;
Marcus_2B 0:2ef6fb83757c 56 } else {
Marcus_2B 5:cf036371055d 57 z = y - 1;
Marcus_2B 5:cf036371055d 58 weekDay = (((23 * m) / 9) + d + 4 + y + (z / 4) - (z / 100) + (z / 400)) % 7;
Marcus_2B 0:2ef6fb83757c 59 }
Marcus_2B 0:2ef6fb83757c 60 return (uint8_t)weekDay;
Marcus_2B 0:2ef6fb83757c 61 }
Marcus_2B 0:2ef6fb83757c 62
Marcus_2B 0:2ef6fb83757c 63