| // 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, |
| } |
| } |