func (s *Scanner) advance(n int) bool {
	if n < 0 {
		s.setErr(ErrNegativeAdvance)
		return false
	}
	if n > s.end-s.start {
		s.setErr(ErrAdvanceTooFar)
		return false
	}
	s.start += n
	return true
}

// setErr records the first error encountered.
func (s *Scanner) setErr(err error) {
	if s.err == nil || s.err == io.EOF {
		s.err = err
	}
}

pkg net, const FlagRunning = 32 #53482
pkg net, const FlagRunning Flags #53482
pkg net/http, func NewResponseController(ResponseWriter) *ResponseController #54136
pkg net/http/httputil, method (*ProxyRequest) SetURL(*url.URL) #53002
pkg net/http/httputil, method (*ProxyRequest) SetXForwarded() #53002
pkg net/http/httputil, type ProxyRequest struct #53002
pkg net/http/httputil, type ProxyRequest struct, In *http.Request #53002

	PSTXVP VS2, $1, 12345678(R2)            // 041000bcf842614e
	PSTXVP VS62, $0, 5555555(R3)            // 04000054fbe3c563
	SETBC CR2EQ, R2                         // 7c4a0300
	SETBCR CR2LT, R2                        // 7c480340
	SETNBC CR2GT, R2                        // 7c490380
	SETNBCR CR6SO, R2                       // 7c5b03c0
	STXVP VS6, 12352(R5)                    // 18c53041