Function StringFromUTF16

string.go:344–364

StringFromUTF16 creates a string value from an array of UTF-16 code units. The result is a copy, so the initial slice can be modified after calling this function (but it must not be modified while the function is running). No validation of any kind is performed.

(chars []uint16)

// slice can be modified after calling this function (but it must not be modified while the function is running).
// No validation of any kind is performed.
func StringFromUTF16(chars []uint16) String {
	isAscii := true
	for _, c := range chars {
		if c >= utf8.RuneSelf {
			isAscii = false
			break
		}
	}
	if isAscii {
		var sb strings.Builder
		sb.Grow(len(chars))
		for _, c := range chars {
			sb.WriteByte(byte(c))
		}
		return asciiString(sb.String())
	}
	buf := make([]uint16, len(chars)+1)
	buf[0] = unistring.BOM
	copy(buf[1:], chars)
	return unicodeString(buf)
}