68 lines
1.6 KiB
Go
68 lines
1.6 KiB
Go
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// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build js,wasm
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package time
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import (
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"runtime"
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"syscall/js"
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)
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var zoneSources = []string{
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"/usr/share/zoneinfo/",
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"/usr/share/lib/zoneinfo/",
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"/usr/lib/locale/TZ/",
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runtime.GOROOT() + "/lib/time/zoneinfo.zip",
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}
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func initLocal() {
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localLoc.name = "Local"
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z := zone{}
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d := js.Global().Get("Date").New()
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offset := d.Call("getTimezoneOffset").Int() * -1
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z.offset = offset * 60
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// According to https://tc39.github.io/ecma262/#sec-timezoneestring,
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// the timezone name from (new Date()).toTimeString() is an implementation-dependent
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// result, and in Google Chrome, it gives the fully expanded name rather than
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// the abbreviation.
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// Hence, we construct the name from the offset.
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z.name = "UTC"
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if offset < 0 {
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z.name += "-"
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offset *= -1
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} else {
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z.name += "+"
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}
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z.name += itoa(offset / 60)
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min := offset % 60
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if min != 0 {
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z.name += ":" + itoa(min)
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}
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localLoc.zone = []zone{z}
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}
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// itoa is like strconv.Itoa but only works for values of i in range [0,99].
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// It panics if i is out of range.
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func itoa(i int) string {
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if i < 10 {
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return digits[i : i+1]
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}
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return smallsString[i*2 : i*2+2]
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}
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const smallsString = "00010203040506070809" +
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"10111213141516171819" +
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"20212223242526272829" +
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"30313233343536373839" +
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"40414243444546474849" +
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"50515253545556575859" +
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"60616263646566676869" +
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"70717273747576777879" +
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"80818283848586878889" +
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"90919293949596979899"
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const digits = "0123456789"
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