Method encodeString

json/encode.go:134–220

(b []byte, p unsafe.Pointer)

}

func (e encoder) encodeString(b []byte, p unsafe.Pointer) ([]byte, error) {
	s := *(*string)(p)
	if len(s) == 0 {
		return append(b, `""`...), nil
	}
	i := 0
	j := 0
	escapeHTML := (e.flags & EscapeHTML) != 0

	b = append(b, '"')

	if len(s) >= 8 {
		if j = escapeIndex(s, escapeHTML); j < 0 {
			return append(append(b, s...), '"'), nil
		}
	}

	for j < len(s) {
		c := s[j]

		if c >= 0x20 && c <= 0x7f && c != '\\' && c != '"' && (!escapeHTML || (c != '<' && c != '>' && c != '&')) {
			// fast path: most of the time, printable ascii characters are used
			j++
			continue
		}

		switch c {
		case '\\', '"', '\b', '\f', '\n', '\r', '\t':
			b = append(b, s[i:j]...)
			b = append(b, '\\', escapeByteRepr(c))
			i = j + 1
			j = j + 1
			continue

		case '<', '>', '&':
			b = append(b, s[i:j]...)
			b = append(b, `\u00`...)
			b = append(b, hex[c>>4], hex[c&0xF])
			i = j + 1
			j = j + 1
			continue
		}

		// This encodes bytes < 0x20 except for \t, \n and \r.
		if c < 0x20 {
			b = append(b, s[i:j]...)
			b = append(b, `\u00`...)
			b = append(b, hex[c>>4], hex[c&0xF])
			i = j + 1
			j = j + 1
			continue
		}

		r, size := utf8.DecodeRuneInString(s[j:])

		if r == utf8.RuneError && size == 1 {
			b = append(b, s[i:j]...)
			b = append(b, `\ufffd`...)