calendar

Calendar Utilities

Functions

Function	Description
`_cal_is_leap`	Internal: leap year check.
`_cal_dim`	Internal: days in month.
`_cal_date`	Internal: days since epoch (1970-01-01 = day 0).
`_cal_copy`	Internal: copy literal.
`cal_weekday`	Day of week for a date. 0=Monday, 6=Sunday. Uses Tomohiko Sakamoto’s algorithm.
`cal_is_leap`	Check leap year.
`cal_days_in_month`	Days in month.
`cal_day_name`	Get day name (0=Mon..6=Sun). Returns length written.
`cal_month_name`	Get month name (1-12). Returns length written.
`_cal_write_day`	Internal: write 2-char number right-aligned.
`cal_month_str`	Generate a month calendar string. Returns length. Format: “Mo Tu We Th Fr Sa …

fn _cal_is_leap(year: i64) -> i64

Internal: leap year check.

fn _cal_dim(year: i64, month: i64) -> i64

Internal: days in month.

fn _cal_date(year: i64, month: i64, day: i64) -> i64

Internal: days since epoch (1970-01-01 = day 0).

fn _cal_copy(dst: &i8, doff: i64, src: &i8, len: i64) -> i64

Internal: copy literal.

fn cal_weekday(year: i64, month: i64, day: i64) -> i64

Day of week for a date. 0=Monday, 6=Sunday. Uses Tomohiko Sakamoto’s algorithm.

fn cal_is_leap(year: i64) -> i64

Check leap year.

fn cal_days_in_month(year: i64, month: i64) -> i64

Days in month.

fn cal_day_name(dow: i64, out: &i8) -> i64

Get day name (0=Mon..6=Sun). Returns length written.

fn cal_month_name(month: i64, out: &i8) -> i64

Get month name (1-12). Returns length written.

fn _cal_write_day(out: &i8, pos: i64, day: i64) -> i64

Internal: write 2-char number right-aligned.

fn cal_month_str(year: i64, month: i64, out: &i8, max: i64) -> i64

Generate a month calendar string. Returns length. Format: “Mo Tu We Th Fr Sa Su\n 1 2 3 …”