// replacement character U+FFFD.
func QuoteRuneToASCII(r rune) string {
	return quoteRuneWith(r, '\'', true, false)
}

// AppendQuoteRuneToASCII appends a single-quoted Go character literal representing the rune,
// as generated by [QuoteRuneToASCII], to dst and returns the extended buffer.
func AppendQuoteRuneToASCII(dst []byte, r rune) []byte {
	return appendQuotedRuneWith(dst, r, '\'', true, false)
}

func (f *fmt) fmtQc(c uint64) {
	r := rune(c)
	if c > utf8.MaxRune {
		r = utf8.RuneError
	}
	buf := f.intbuf[:0]
	if f.plus {
		f.pad(strconv.AppendQuoteRuneToASCII(buf, r))
	} else {
		f.pad(strconv.AppendQuoteRune(buf, r))
	}
}

// fmtFloat formats a float64. It assumes that verb is a valid format specifier