hare

commit 9dbf69f0bf72d183e20c1e98c68b3ac74f3e50cd
parent f9c6d44f3f1192e767cc51c71c72a43226df7351
Author: Byron Torres <b@torresjrjr.com>
Date:   Sun,  9 Jan 2022 03:05:47 +0000

new timezone in() functions

Signed-off-by: Byron Torres <b@torresjrjr.com>

Diffstat:
M
datetime/timezone.ha
 | 
9
++++++---
M
time/chrono/timezone.ha
 | 
8
++++++--

2 files changed, 12 insertions(+), 5 deletions(-)
diff --git a/datetime/timezone.ha b/datetime/timezone.ha
@@ -1,10 +1,13 @@
 use time;
 use time::chrono;
 
-// Retrieves a IANA timezone object by name
-export fn tzdb(name: str) chrono::timezone = {
+// Transforms and creates a new [[datetime]] in a different [[chrono::locality]]
+export fn in(loc: chrono::locality, dt: datetime) datetime = {
 	// TODO
-	return chrono::timezone { ... };
+	const old = to_moment(dt);
+	const new = chrono::in(loc, old);
+	const new_dt = from_moment(new);
+	return new_dt;
 };
 
 
diff --git a/time/chrono/timezone.ha b/time/chrono/timezone.ha
@@ -58,9 +58,13 @@ type tzname = struct {
 	dst_endtime: str,
 };
 
+// Transforms and creates a new [[moment]] in a different [[locality]]
+export fn in(loc: locality, m: moment) moment = {
+	return new(m.date, m.time, m.loc); // resets .zone
+};
+
 // Returns a fictitious moment which assumes it's own locality is the normal
-// locality. The given timezone is consulted to find the current zone, and its
-// offset is applied to the new .date and .time fields.
+// locality. Its .date & .time fields are adjusted by its current zone's offset.
 export fn localize(m: moment) moment = {
 	const zone = lookupzone(m);
 	const newtime = m.time + zone.zoffset;