rss-tools: vendor/golang.org/x/text/internal/language/compact.go (a5ac52722b131734c74504b6e6f4d9900536cac7)

rss-tools/vendor/golang.org/x/text/internal/language/compact.go (view raw)

Oleksandr Smirnov we're vendoring now, 7 days ago

// 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,
	}
}

1	// Copyright 2018 The Go Authors. All rights reserved.
2	// Use of this source code is governed by a BSD-style
3	// license that can be found in the LICENSE file.
4
5	package language
6
7	// CompactCoreInfo is a compact integer with the three core tags encoded.
8	type CompactCoreInfo uint32
9
10	// GetCompactCore generates a uint32 value that is guaranteed to be unique for
11	// different language, region, and script values.
12	func GetCompactCore(t Tag) (cci CompactCoreInfo, ok bool) {
13	if t.LangID > langNoIndexOffset {
14	return 0, false
15	}
16	cci \|= CompactCoreInfo(t.LangID) << (8 + 12)
17	cci \|= CompactCoreInfo(t.ScriptID) << 12
18	cci \|= CompactCoreInfo(t.RegionID)
19	return cci, true
20	}
21
22	// Tag generates a tag from c.
23	func (c CompactCoreInfo) Tag() Tag {
24	return Tag{
25	LangID: Language(c >> 20),
26	RegionID: Region(c & 0x3ff),
27	ScriptID: Script(c>>12) & 0xff,
28	}
29	}