mirror of
https://github.com/golang/go
synced 2024-11-06 19:56:15 -07:00
67 lines
1.6 KiB
Go
67 lines
1.6 KiB
Go
|
// Copyright 2018 The Go Authors. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style
|
||
|
|
// license that can be found in the LICENSE file.
|
||
|
|
|
||
|
|
// +build js,wasm
|
||
|
|
|
||
|
|
package time
|
||
|
|
|
||
|
|
import (
|
||
|
|
"runtime"
|
||
|
|
"syscall/js"
|
||
|
|
)
|
||
|
|
|
||
|
|
var zoneSources = []string{
|
||
|
|
"/usr/share/zoneinfo/",
|
||
|
|
"/usr/share/lib/zoneinfo/",
|
||
|
|
"/usr/lib/locale/TZ/",
|
||
|
|
runtime.GOROOT() + "/lib/time/zoneinfo.zip",
|
||
|
|
}
|
||
|
|
|
||
|
|
func initLocal() {
|
||
|
|
localLoc.name = "Local"
|
||
|
|
|
||
|
|
z := zone{}
|
||
|
|
d := js.Global().Get("Date").New()
|
||
|
|
offset := d.Call("getTimezoneOffset").Int() * -1
|
||
|
|
z.offset = offset * 60
|
||
|
|
// According to https://tc39.github.io/ecma262/#sec-timezoneestring,
|
||
|
|
// the timezone name from (new Date()).toTimeString() is an implementation-dependent
|
||
|
|
// result, and in Google Chrome, it gives the fully expanded name rather than
|
||
|
|
// the abbreviation.
|
||
|
|
// Hence, we construct the name from the offset.
|
||
|
|
z.name = "UTC"
|
||
|
|
if offset < 0 {
|
||
|
|
z.name += "-"
|
||
|
|
} else {
|
||
|
|
z.name += "+"
|
||
|
|
}
|
||
|
|
z.name += itoa(offset / 60)
|
||
|
|
min := offset % 60
|
||
|
|
if min != 0 {
|
||
|
|
z.name += ":" + itoa(min)
|
||
|
|
}
|
||
|
|
localLoc.zone = []zone{z}
|
||
|
|
}
|
||
|
|
|
||
|
|
// itoa is just the fast path implementation copied from strconv.Itoa.
|
||
|
|
// No timezone hour can exceed 100, so the fast path will always satisfy.
|
||
|
|
func itoa(i int) string {
|
||
|
|
if i < 10 {
|
||
|
|
return digits[i : i+1]
|
||
|
|
}
|
||
|
|
return smallsString[i*2 : i*2+2]
|
||
|
|
}
|
||
|
|
|
||
|
|
const smallsString = "00010203040506070809" +
|
||
|
|
"10111213141516171819" +
|
||
|
|
"20212223242526272829" +
|
||
|
|
"30313233343536373839" +
|
||
|
|
"40414243444546474849" +
|
||
|
|
"50515253545556575859" +
|
||
|
|
"60616263646566676869" +
|
||
|
|
"70717273747576777879" +
|
||
|
|
"80818283848586878889" +
|
||
|
|
"90919293949596979899"
|
||
|
|
const digits = "0123456789"
|