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some updates

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This commit is contained in:
KubaPro010
2025-03-09 14:39:02 +01:00
parent 49cb210238
commit c7b7ec2e9d
1 changed files with 31 additions and 32 deletions
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63
src/dcf95.c
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@@ -45,6 +45,37 @@ static void stop(int signum) {
to_run = 0;
}
// Helper function to determine if a given time is in DST for CET
int is_cet_dst(struct tm *tm_time) {
// CET DST rules: starts last Sunday of March at 2:00, ends last Sunday of October at 3:00
int month = tm_time->tm_mon + 1; // tm_mon is 0-based
int day = tm_time->tm_mday;
int wday = tm_time->tm_wday; // 0 = Sunday, 6 = Saturday
int hour = tm_time->tm_hour;
// March - check if we're in the last Sunday or after
if (month == 3) {
// Calculate the date of the last Sunday in March
int last_sunday = 31 - ((5 + 31) % 7); // Calculate last Sunday
if ((day > last_sunday) || (day == last_sunday && hour >= 2)) {
return 1; // DST has started
}
}
// April through September - definitely DST
else if (month > 3 && month < 10) {
return 1;
}
// October - check if we're before the last Sunday
else if (month == 10) {
// Calculate the date of the last Sunday in October
int last_sunday = 31 - ((5 + 31) % 7); // Calculate last Sunday
if ((day < last_sunday) || (day == last_sunday && hour < 3)) {
return 1; // Still in DST
}
}
return 0; // Not in DST
}
int is_timezone_change_soon() {
time_t now, in_an_hour;
struct tm cet_now, cet_later;
@@ -88,38 +119,6 @@ int is_timezone_change_soon() {
return is_dst_now != is_dst_later;
}
// Helper function to determine if a given time is in DST for CET
int is_cet_dst(struct tm *tm_time) {
// CET DST rules: starts last Sunday of March at 2:00, ends last Sunday of October at 3:00
int month = tm_time->tm_mon + 1; // tm_mon is 0-based
int day = tm_time->tm_mday;
int wday = tm_time->tm_wday; // 0 = Sunday, 6 = Saturday
int hour = tm_time->tm_hour;
// March - check if we're in the last Sunday or after
if (month == 3) {
// Calculate the date of the last Sunday in March
int last_sunday = 31 - ((5 + 31) % 7); // Calculate last Sunday
if ((day > last_sunday) || (day == last_sunday && hour >= 2)) {
return 1; // DST has started
}
}
// April through September - definitely DST
else if (month > 3 && month < 10) {
return 1;
}
// October - check if we're before the last Sunday
else if (month == 10) {
// Calculate the date of the last Sunday in October
int last_sunday = 31 - ((5 + 31) % 7); // Calculate last Sunday
if ((day < last_sunday) || (day == last_sunday && hour < 3)) {
return 1; // Still in DST
}
}
return 0; // Not in DST
}
// Function to calculate DCF77 bits based on current time
void calculate_dcf77_bits(time_t now, int *bits) {
struct tm *t = gmtime(&now); // Use local time instead of UTC