Function AppendJSONString

gjson.go:2037–2086

AppendJSONString is a convenience function that converts the provided string to a valid JSON string and appends it to dst.

(dst []byte, s string)

// AppendJSONString is a convenience function that converts the provided string
// to a valid JSON string and appends it to dst.
func AppendJSONString(dst []byte, s string) []byte {
	dst = append(dst, make([]byte, len(s)+2)...)
	dst = append(dst[:len(dst)-len(s)-2], '"')
	for i := 0; i < len(s); i++ {
		if s[i] < ' ' {
			dst = append(dst, '\\')
			switch s[i] {
			case '\b':
				dst = append(dst, 'b')
			case '\f':
				dst = append(dst, 'f')
			case '\n':
				dst = append(dst, 'n')
			case '\r':
				dst = append(dst, 'r')
			case '\t':
				dst = append(dst, 't')
			default:
				dst = append(dst, 'u')
				dst = appendHex16(dst, uint16(s[i]))
			}
		} else if !DisableEscapeHTML &&
			(s[i] == '>' || s[i] == '<' || s[i] == '&') {
			dst = append(dst, '\\', 'u')
			dst = appendHex16(dst, uint16(s[i]))
		} else if s[i] == '\\' {
			dst = append(dst, '\\', '\\')
		} else if s[i] == '"' {
			dst = append(dst, '\\', '"')
		} else if s[i] > 127 {
			// read utf8 character
			r, n := utf8.DecodeRuneInString(s[i:])
			if n == 0 {
				break
			}
			if r == utf8.RuneError && n == 1 {
				dst = append(dst, `\ufffd`...)
			} else if r == '\u2028' || r == '\u2029' {
				dst = append(dst, `\u202`...)
				dst = append(dst, hexchars[r&0xF])
			} else {
				dst = append(dst, s[i:i+n]...)
			}
			i = i + n - 1
		} else {
			dst = append(dst, s[i])
		}
	}
	return append(dst, '"')
}

type parseContext struct {
	json  string