go-utf8/len.go

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This file contains ambiguous Unicode characters!

This file contains ambiguous Unicode characters that may be confused with others in your current locale. If your use case is intentional and legitimate, you can safely ignore this warning. Use the Escape button to highlight these characters.

package utf8s
// Len returns the number of bytes in a UTF-8 encoding of this Unicode code point.
//
// Example
//
// length := utf8s.Len('A')
//
// // length == 1
//
// Example
//
// length := utf8s.Len('r')
//
// // length == 1
//
// Example
//
// length := utf8s.Len('¡')
//
// // length == 2
//
// Example
//
// length := utf8s.Len('۵')
//
// // length == 2
func Len(r rune) int {
switch {
case 127 >= r:
return 1
case 0x7FF >= r:
return 2
case 0xFFFF >= r:
return 3
case 0x10FFFF >= r:
return 4
default:
return 0
}
}