0be354a920
Single-commit clean baseline after security scrub of niche-tells, project codenames, internal jargon, and contributor-email leaks. Contents: - 100 Rust crates (_primitives/_rust/) - 37 agent manifests (_manifests/) + generated specs (_generated/) - 67 user-invocable skills (skills/) - 33 hooks (hooks/) - Composition blocks (_blocks/) - Documentation (docs/, README.md) - TS adapter packages (_ts_packages/) - Assembler (_assembler/) - Roles (_roles/) - Templates (_templates/) - Forgejo CI (.forgejo/) Author: Denis Parfionovich <info@greendragon.info> License: see LICENSE.
74 lines
2 KiB
Rust
74 lines
2 KiB
Rust
//! Minimal ISO-8601 UTC timestamp without external crate dependencies.
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//!
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//! Constructor Pattern: one pure function `utc_now()` with helpers.
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//! No std-external time crate required — stdlib `SystemTime` only.
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/// Return current UTC time as ISO-8601 string (`YYYY-MM-DDTHH:MM:SSZ`).
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pub fn utc_now() -> String {
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use std::time::{SystemTime, UNIX_EPOCH};
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let secs = SystemTime::now()
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.duration_since(UNIX_EPOCH)
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.map(|d| d.as_secs())
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.unwrap_or(0);
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let (y, mo, d, h, mi, sec) = epoch_to_ymdhms(secs);
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format!("{y:04}-{mo:02}-{d:02}T{h:02}:{mi:02}:{sec:02}Z")
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}
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fn epoch_to_ymdhms(secs: u64) -> (u64, u64, u64, u64, u64, u64) {
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let sec = secs % 60;
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let total_min = secs / 60;
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let mi = total_min % 60;
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let total_h = total_min / 60;
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let h = total_h % 24;
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let mut days = total_h / 24;
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let mut y = 1970u64;
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loop {
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let dy = if is_leap(y) { 366 } else { 365 };
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if days < dy {
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break;
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}
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days -= dy;
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y += 1;
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}
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let months = if is_leap(y) {
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[31u64, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
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} else {
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[31u64, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
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};
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let mut mo = 1u64;
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for &dm in &months {
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if days < dm {
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break;
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}
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days -= dm;
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mo += 1;
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}
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(y, mo, days + 1, h, mi, sec)
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}
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fn is_leap(y: u64) -> bool {
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(y % 4 == 0 && y % 100 != 0) || (y % 400 == 0)
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn epoch_zero_is_unix_epoch() {
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let (y, mo, d, h, mi, s) = epoch_to_ymdhms(0);
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assert_eq!((y, mo, d, h, mi, s), (1970, 1, 1, 0, 0, 0));
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}
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#[test]
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fn known_timestamp_parses_correctly() {
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// 2024-01-15T12:00:00Z = 1705320000
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let (y, mo, d, h, mi, s) = epoch_to_ymdhms(1_705_320_000);
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assert_eq!(y, 2024);
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assert_eq!(mo, 1);
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assert_eq!(d, 15);
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assert_eq!(h, 12);
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assert_eq!(mi, 0);
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assert_eq!(s, 0);
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}
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}
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