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)

	"sort"
	"strings"

	"golang.org/x/text/internal/language"
)

// ID is an integer identifying a single tag.
type ID uint16

func getCoreIndex(t language.Tag) (id ID, ok bool) {
	cci, ok := language.GetCompactCore(t)
	if !ok {
		return 0, false
	}
	i := sort.Search(len(coreTags), func(i int) bool {
		return cci <= coreTags[i]
	})
	if i == len(coreTags) || coreTags[i] != cci {
		return 0, false
	}