import (
	"encoding/binary"
	"fmt"
	"log"
)

const debugDecode = false

const prefixOpcode = 1

// instFormat is a decoding rule for one specific instruction form.
// an instruction ins matches the rule if ins&Mask == Value
// DontCare bits should be zero, but the machine might not reject
// ones in those bits, they are mainly reserved for future expansion
// of the instruction set.

}

func ExampleIP_Mask() {
	ipv4Addr := net.ParseIP("192.0.2.1")
	// This mask corresponds to a /24 subnet for IPv4.
	ipv4Mask := net.CIDRMask(24, 32)
	fmt.Println(ipv4Addr.Mask(ipv4Mask))

	ipv6Addr := net.ParseIP("2001:db8:a0b:12f0::1")
	// This mask corresponds to a /32 subnet for IPv6.
	ipv6Mask := net.CIDRMask(32, 128)
	fmt.Println(ipv6Addr.Mask(ipv6Mask))

	// Output:
	// 192.0.2.0
	// 2001:db8::
}

type stopping struct {
	c chan<- os.Signal
	h *handler
}

type handler struct {
	mask [(numSig + 31) / 32]uint32
}

func (h *handler) want(sig int) bool {
	return (h.mask[sig/32]>>uint(sig&31))&1 != 0
}

func (h *handler) set(sig int) {
	h.mask[sig/32] |= 1 << uint(sig&31)
}

func (h *handler) clear(sig int) {
	h.mask[sig/32] &^= 1 << uint(sig&31)
}

    DefaultCompositeExclude(ImmutableSet<ExcludeSpec> components) {
        this.components = components;
        this.size = components.size();
        this.hashCode = (31 * components.hashCode() + this.size) ^ mask();
    }

    abstract int mask();

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {

//
//go:nosplit
func setSignalstackSP(s *stackt, sp uintptr) {
	s.ss_sp = sp
}

//go:nosplit
//go:nowritebarrierrec
func sigaddset(mask *sigset, i int) {
	*mask |= 1 << (uint32(i) - 1)
}

func sigdelset(mask *sigset, i int) {
	*mask &^= 1 << (uint32(i) - 1)
}

//go:nosplit
func (c *sigctxt) fixsigcode(sig uint32) {
}

func setProcessCPUProfiler(hz int32) {

	}

	pattern := event.NewPattern(prefix, suffix)

	var eventNames []event.Name
	var mask pubsub.Mask
	for _, s := range values[peerRESTListenEvents] {
		eventName, err := event.ParseName(s)
		if err != nil {
			writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
			return
		}
		mask.MergeMaskable(eventName)
		eventNames = append(eventNames, eventName)
	}

	if bucketName != "" {

	_ = yyyyyyyyyyyyyyyy			/* comment - should be aligned */

	_ = xxxxxxxxxxxxxxxxxxxxxxxxxxxx	// comment
	_ = yyyyyyyyyyyyyyyy			// comment - should be aligned

	// test case from issue
label:
	mask := uint64(1)<<c - 1		// Allocation mask
	used := atomic.LoadUint64(&h.used)	// Current allocations
}

// Test cases for issue 18782
var _ = [][]int{
	/*       a, b, c, d, e */
	/* a */ {0, 0, 0, 0, 0},

		image.Rectangle{},
		image.Pt(44, 33),
		image.Point{},
		true,
		image.Rect(0, 0, 36, 47),
		image.Pt(44, 33),
		image.Point{},
	},

	// The following tests all have a non-nil mask.
	{
		"basic mask",
		image.Rect(0, 0, 80, 80),
		image.Rect(20, 0, 100, 80),
		image.Rect(0, 0, 50, 49),
		image.Rect(0, 0, 46, 47),
		image.Point{},
		image.Point{},
		false,
		image.Rect(20, 0, 46, 47),

  internal const val B0_FLAG_RSV3 = 16

  /** Byte 0 mask for the frame opcode. */
  internal const val B0_MASK_OPCODE = 15

  /** Flag in the opcode which indicates a control frame. */
  internal const val OPCODE_FLAG_CONTROL = 8

  /**
   * Byte 1 flag for whether the payload data is masked.
   *
   * If this flag is set, the next four

	// is not what we want; thus, we skip chmod for symlinks.
	if info.Mode()&os.ModeSymlink != 0 {
		return nil
	}

	mask := rwMask
	if readonly {
		mask = roMask
	}

	if info.IsDir() {
		mask |= os.ModeSetgid
		mask |= execMask
	}

	err = os.Chmod(filename, info.Mode()|mask)
	if err != nil {
		klog.ErrorS(err, "chmod failed", "path", filename)
	}

	return nil
}