}

func TestIndexByte(t *testing.T) {
	for _, tt := range indexTests {
		if len(tt.sep) != 1 {
			continue
		}
		pos := IndexByte(tt.s, tt.sep[0])
		if pos != tt.out {
			t.Errorf(`IndexByte(%q, %q) = %v; want %v`, tt.s, tt.sep[0], pos, tt.out)
		}
	}
}

func TestLastIndexByte(t *testing.T) {
	testCases := []IndexTest{
		{"", "q", -1},

	// For subsecond durations, blank all zeros before decimal point,
	// and all zeros between the decimal point and the first non-zero digit.
	if d < time.Second {
		dot := bytes.IndexByte(b, '.')
		for i := 0; i < dot; i++ {
			b[i] = ' '
		}
		for i := dot + 1; i < len(b); i++ {
			if b[i] == '0' {
				b[i] = ' '
			} else {
				break
			}
		}
	}
	return string(b)

		case _C_EAI_NONAME:
			return nil, newDNSError(errNoSuchHost, addr, "")
		default:
			return nil, newDNSError(addrinfoErrno(gerrno), addr, "")
		}
	}
	if i := bytealg.IndexByte(b, 0); i != -1 {
		b = b[:i]
	}
	return []string{absDomainName(string(b))}, nil
}

func cgoSockaddr(ip IP, zone string) (*_C_struct_sockaddr, _C_socklen_t) {
	if ip4 := ip.To4(); ip4 != nil {

		npath := strings.Replace(path, "/", `\`, -1)
		// Get the host part, which must be non-empty.
		slash1 := strings.IndexByte(npath[2:], '\\') + 2
		if slash1 > 2 {
			// Get the mount-point part, which must be non-empty.
			slash2 := strings.IndexByte(npath[slash1+1:], '\\') + slash1 + 1
			if slash2 > slash1 {
				return path[:slash2], path[slash2:]
			}
		}
	}
	return "", path

	//     to zero.
	db[0] &= bitMask

	// If we don't know the salt length, look for the 0x01 delimiter.
	if sLen == PSSSaltLengthAuto {
		psLen := bytes.IndexByte(db, 0x01)
		if psLen < 0 {
			return ErrVerification
		}
		sLen = len(db) - psLen - 1
	}

	// 10. If the emLen - hLen - sLen - 2 leftmost octets of DB are not zero

		forward := ""
		if len(opts.ForwardTo) > 0 && strings.HasPrefix(opts.ForwardTo, current) {
			forward = strings.TrimPrefix(opts.ForwardTo, current)
			// Trim further directories and trailing slash.
			if idx := strings.IndexByte(forward, '/'); idx > 0 {
				forward = forward[:idx]
			}
		}
		if contextCanceled(ctx) {
			return ctx.Err()
		}
		if opts.Limit > 0 && objsReturned >= opts.Limit {
			return nil
		}

		p.collectFuncs(t.Methods)
	}
}

func (p *Package) collectFuncs(funcs []*Func) {
	for _, f := range funcs {
		if f.Recv != "" {
			r := strings.TrimPrefix(f.Recv, "*")
			if i := strings.IndexByte(r, '['); i >= 0 {
				r = r[:i] // remove type parameters
			}
			p.syms[r+"."+f.Name] = true
		} else {
			p.syms[f.Name] = true
		}
	}
}

// NewFromFiles computes documentation for a package.

func svcLoad(name *byte) unsafe.Pointer
func svcUnload(name *byte, fnptr unsafe.Pointer) int64

func (d *Dirent) NameString() string {
	if d == nil {
		return ""
	}
	s := string(d.Name[:])
	idx := strings.IndexByte(s, 0)
	if idx == -1 {
		return s
	} else {
		return s[:idx]
	}
}

func DecodeData(dest []byte, sz int, val uint64) {
	for i := 0; i < sz; i++ {

	case []any:
		return transformInterfaceArray(v)
	case map[any]any:
		return transformInterfaceMap(v)
	default:
		return v
	}
}

func servicePortPrefixed(n string) bool {
	i := strings.IndexByte(n, '-')
	if i >= 0 {
		n = n[:i]
	}
	p := protocol.Parse(n)
	return p == protocol.Unsupported
}

func handleNamespace(istioNamespace string) string {
	if istioNamespace == "" {

	errCh := make(chan error)
	go func() {
		_, err := c.Write([]byte{0xff})
		errCh <- err
	}()
	buf := make([]byte, 1024)
	for {
		n, err := c.Read(buf)
		if n > 0 && bytes.IndexByte(buf[:n], 0xff) == n-1 {
			break
		}
		if err != nil {
			t.Errorf("unexpected Read error: %v", err)
			break
		}
	}
	if err := <-errCh; err != nil {
		t.Errorf("unexpected Write error: %v", err)