Function EncodeEscapedChar

pkg/util/stringencoding/string_encoding.go:82–118

EncodeEscapedChar is used internally to write out a character from a larger string that needs to be escaped to a buffer.

(
	buf *bytes.Buffer,
	entireString string,
	currentRune rune,
	currentByte byte,
	currentIdx int,
	quoteChar byte,
)

// EncodeEscapedChar is used internally to write out a character from a larger
// string that needs to be escaped to a buffer.
func EncodeEscapedChar(
	buf *bytes.Buffer,
	entireString string,
	currentRune rune,
	currentByte byte,
	currentIdx int,
	quoteChar byte,
) {
	ln := utf8.RuneLen(currentRune)
	if currentRune == utf8.RuneError {
		// Errors are due to invalid unicode points, so escape the bytes.
		// Make sure this is run at least once in case ln == -1.
		buf.Write(HexMap[entireString[currentIdx]])
		for ri := 1; ri < ln; ri++ {
			if currentIdx+ri < len(entireString) {
				buf.Write(HexMap[entireString[currentIdx+ri]])
			}
		}
	} else if ln == 1 {
		// For single-byte runes, do the same as encodeSQLBytes.
		if encodedChar := EncodeMap[currentByte]; encodedChar != DontEscape {
			buf.WriteByte('\\')
			buf.WriteByte(encodedChar)
		} else if currentByte == quoteChar {
			buf.WriteByte('\\')
			buf.WriteByte(quoteChar)
		} else {
			// Escape non-printable characters.
			buf.Write(HexMap[currentByte])
		}
	} else if ln == 2 {
		// For multi-byte runes, print them based on their width.
		fmt.Fprintf(buf, `\u%04X`, currentRune)
	} else {
		fmt.Fprintf(buf, `\U%08X`, currentRune)
	}
}

func writeHexDigit(buf *bytes.Buffer, v int) {
	if v < 10 {