29 lines
853 B
Go
29 lines
853 B
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.
|
|
|
|
package language
|
|
|
|
// CompactCoreInfo is a compact integer with the three core tags encoded.
|
|
type CompactCoreInfo uint32
|
|
|
|
// GetCompactCore generates a uint32 value that is guaranteed to be unique for
|
|
// different language, region, and script values.
|
|
func GetCompactCore(t Tag) (cci CompactCoreInfo, ok bool) {
|
|
if t.LangID > langNoIndexOffset {
|
|
return 0, false
|
|
}
|
|
cci |= CompactCoreInfo(t.LangID) << (8 + 12)
|
|
cci |= CompactCoreInfo(t.ScriptID) << 12
|
|
cci |= CompactCoreInfo(t.RegionID)
|
|
return cci, true
|
|
}
|
|
|
|
// Tag generates a tag from c.
|
|
func (c CompactCoreInfo) Tag() Tag {
|
|
return Tag{
|
|
LangID: Language(c >> 20),
|
|
RegionID: Region(c & 0x3ff),
|
|
ScriptID: Script(c>>12) & 0xff,
|
|
}
|
|
}
|