gcc/libgo/go/time/zoneinfo_unix.go
Ian Lance Taylor c2047754c3 libgo: update to Go 1.8 release candidate 1
Compiler changes:
      * Change map assignment to use mapassign and assign value directly.
      * Change string iteration to use decoderune, faster for ASCII strings.
      * Change makeslice to take int, and use makeslice64 for larger values.
      * Add new noverflow field to hmap struct used for maps.
    
    Unresolved problems, to be fixed later:
      * Commented out test in go/types/sizes_test.go that doesn't compile.
      * Commented out reflect.TestStructOf test for padding after zero-sized field.
    
    Reviewed-on: https://go-review.googlesource.com/35231

gotools/:
	Updates for Go 1.8rc1.
	* Makefile.am (go_cmd_go_files): Add bug.go.
	(s-zdefaultcc): Write defaultPkgConfig.
	* Makefile.in: Rebuild.

From-SVN: r244456
2017-01-14 00:05:42 +00:00

90 lines
2.1 KiB
Go

// Copyright 2009 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 darwin,386 darwin,amd64 dragonfly freebsd linux,!android nacl netbsd openbsd solaris
// Parse "zoneinfo" time zone file.
// This is a fairly standard file format used on OS X, Linux, BSD, Sun, and others.
// See tzfile(5), http://en.wikipedia.org/wiki/Zoneinfo,
// and ftp://munnari.oz.au/pub/oldtz/
package time
import (
"errors"
"runtime"
"syscall"
)
func initTestingZone() {
z, err := loadLocation("America/Los_Angeles")
if err != nil {
panic("cannot load America/Los_Angeles for testing: " + err.Error())
}
z.name = "Local"
localLoc = *z
}
// Many systems use /usr/share/zoneinfo, Solaris 2 has
// /usr/share/lib/zoneinfo, IRIX 6 has /usr/lib/locale/TZ.
var zoneDirs = []string{
"/usr/share/zoneinfo/",
"/usr/share/lib/zoneinfo/",
"/usr/lib/locale/TZ/",
runtime.GOROOT() + "/lib/time/zoneinfo.zip",
}
var origZoneDirs = zoneDirs
func forceZipFileForTesting(zipOnly bool) {
zoneDirs = make([]string, len(origZoneDirs))
copy(zoneDirs, origZoneDirs)
if zipOnly {
for i := 0; i < len(zoneDirs)-1; i++ {
zoneDirs[i] = "/XXXNOEXIST"
}
}
}
func initLocal() {
// consult $TZ to find the time zone to use.
// no $TZ means use the system default /etc/localtime.
// $TZ="" means use UTC.
// $TZ="foo" means use /usr/share/zoneinfo/foo.
tz, ok := syscall.Getenv("TZ")
switch {
case !ok:
z, err := loadZoneFile("", "/etc/localtime")
if err == nil {
localLoc = *z
localLoc.name = "Local"
return
}
case tz != "" && tz != "UTC":
if z, err := loadLocation(tz); err == nil {
localLoc = *z
return
}
}
// Fall back to UTC.
localLoc.name = "UTC"
}
func loadLocation(name string) (*Location, error) {
var firstErr error
for _, zoneDir := range zoneDirs {
if z, err := loadZoneFile(zoneDir, name); err == nil {
z.name = name
return z, nil
} else if firstErr == nil && !isNotExist(err) {
firstErr = err
}
}
if firstErr != nil {
return nil, firstErr
}
return nil, errors.New("unknown time zone " + name)
}