package zenutil // Unescape is internal. func Unescape(s string) string { // Apply rules described in: // https://developer.gnome.org/glib/stable/glib-String-Utility-Functions.html#g-strescape const ( initial = iota escape1 escape2 escape3 ) var oct byte var res []byte state := initial for _, b := range []byte(s) { switch state { case initial: switch b { case '\\': state = escape1 default: res = append(res, b) state = initial } case escape1: switch b { case '0', '1', '2', '3', '4', '5', '6', '7': oct = b - '0' state = escape2 case 'b': res = append(res, '\b') state = initial case 'f': res = append(res, '\f') state = initial case 'n': res = append(res, '\n') state = initial case 'r': res = append(res, '\r') state = initial case 't': res = append(res, '\t') state = initial case 'v': res = append(res, '\v') state = initial default: res = append(res, b) state = initial } case escape2: switch b { case '0', '1', '2', '3', '4', '5', '6', '7': oct = oct<<3 | (b - '0') state = escape3 case '\\': res = append(res, oct) state = escape1 default: res = append(res, oct, b) state = initial } case escape3: switch b { case '0', '1', '2', '3', '4', '5', '6', '7': oct = oct<<3 | (b - '0') res = append(res, oct) state = initial case '\\': res = append(res, oct) state = escape1 default: res = append(res, oct, b) state = initial } } } if state == escape2 || state == escape3 { res = append(res, oct) } return string(res) }