posix_tz.h File Reference

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Data Structures
struct	esphome::time::DSTRule
	Rule for DST transition (packed for 32-bit: 12 bytes) More...
struct	esphome::time::ParsedTimezone
	Parsed POSIX timezone information (packed for 32-bit: 32 bytes) More...

Namespaces
namespace	esphome
	Providing packet encoding functions for exchanging data with a remote host.
namespace	esphome::time
namespace	esphome::time::internal

Enumerations
enum class	esphome::time::DSTRuleType : uint8_t { esphome::time::NONE = 0 , esphome::time::MONTH_WEEK_DAY , esphome::time::JULIAN_NO_LEAP , esphome::time::DAY_OF_YEAR }
	Type of DST transition rule. More...

Functions
bool	esphome::time::parse_posix_tz (const char *tz_string, ParsedTimezone &result)
	Parse a POSIX TZ string into a ParsedTimezone struct.
bool	esphome::time::epoch_to_local_tm (time_t utc_epoch, const ParsedTimezone &tz, struct tm *out_tm)
	Convert a UTC epoch to local time using the parsed timezone.
void	esphome::time::set_global_tz (const ParsedTimezone &tz)
	Set the global timezone used by epoch_to_local_tm() when called without a timezone.
const ParsedTimezone &	esphome::time::get_global_tz ()
	Get the global timezone.
bool	esphome::time::is_in_dst (time_t utc_epoch, const ParsedTimezone &tz)
	Check if a given UTC epoch falls within DST for the parsed timezone.
bool	esphome::time::internal::skip_tz_name (const char *&p)
	Skip a timezone name (letters or <...> quoted format)
int32_t	esphome::time::internal::parse_offset (const char *&p)
	Parse an offset in format [-]hh[:mm[:ss]].
bool	esphome::time::internal::parse_dst_rule (const char *&p, DSTRule &rule)
	Parse a DST rule in format Mm.w.d[/time], Jn[/time], or n[/time].
void	esphome::time::internal::julian_to_month_day (int julian_day, int &month, int &day)
	Convert Julian day (J format, 1-365 not counting Feb 29) to month/day.
void	esphome::time::internal::day_of_year_to_month_day (int day_of_year, int year, int &month, int &day)
	Convert day of year (plain format, 0-365 counting Feb 29) to month/day.
int	esphome::time::internal::day_of_week (int year, int month, int day)
	Calculate day of week for any date (0 = Sunday) Uses a simplified algorithm that works for years 1970-2099.
int	esphome::time::internal::days_in_month (int year, int month)
	Get the number of days in a month.
bool	esphome::time::internal::is_leap_year (int year)
	Check if a year is a leap year.
void	esphome::time::internal::epoch_to_tm_utc (time_t epoch, struct tm *out_tm)
	Convert epoch to year/month/day/hour/min/sec (UTC)
time_t	esphome::time::internal::calculate_dst_transition (int year, const DSTRule &rule, int32_t base_offset_seconds)
	Calculate the epoch timestamp for a DST transition in a given year.