package sha3

// spongeDirection indicates the direction bytes are flowing through the sponge.
type spongeDirection int

const (
	// spongeAbsorbing indicates that the sponge is absorbing input.
	spongeAbsorbing spongeDirection = iota
	// spongeSqueezing indicates that the sponge is being squeezed.
	spongeSqueezing
)

const (
	// maxRate is the maximum size of the internal buffer. SHAKE-256
	// currently needs the largest buffer.
	maxRate = 168

// inserted for "pointerness" are not evaluated until the function is
// called, so a T.f or (*T).f expression never panics.
type SelectionKind int

const (
	FieldVal   SelectionKind = iota // x.f is a struct field selector
	MethodVal                       // x.f is a method selector
	MethodExpr                      // x.f is a method expression
)

// A Selection describes a selector expression x.f.

package os

import (
	"internal/bytealg"
	"internal/filepathlite"
	"io"
	"io/fs"
	"slices"
)

type readdirMode int

const (
	readdirName readdirMode = iota
	readdirDirEntry
	readdirFileInfo
)

// Readdir reads the contents of the directory associated with file and
// returns a slice of up to n [FileInfo] values, as would be returned

//     are suffixes reserved for scheduling resources.
//
// NOTE: If you add an event type, make sure you also update all
// tables in this file!
type traceEv uint8

const (
	traceEvNone traceEv = iota // unused

	// Structural events.
	traceEvEventBatch // start of per-M batch of events [generation, M ID, timestamp, batch length]
	traceEvStacks     // start of a section of the stack table [...traceEvStack]

	if fastSmalls && 0 <= i && i < nSmalls && base == 10 {
		return small(int(i))
	}
	_, s := formatBits(nil, uint64(i), base, i < 0, false)
	return s
}

// Itoa is equivalent to [FormatInt](int64(i), 10).
func Itoa(i int) string {
	return FormatInt(int64(i), 10)
}

// AppendInt appends the string form of the integer i,
// as generated by [FormatInt], to dst and returns the extended buffer.

	ip := ParseIP(addr)
	if ip == nil {
		return "", &DNSError{Err: "unrecognized address", Name: addr}
	}
	if ip.To4() != nil {
		return itoa.Uitoa(uint(ip[15])) + "." + itoa.Uitoa(uint(ip[14])) + "." + itoa.Uitoa(uint(ip[13])) + "." + itoa.Uitoa(uint(ip[12])) + ".in-addr.arpa.", nil
	}
	// Must be IPv6
	buf := make([]byte, 0, len(ip)*4+len("ip6.arpa."))
	// Add it, in reverse, to the buffer

// of basic data types.
//
// # Numeric Conversions
//
// The most common numeric conversions are [Atoi] (string to int) and [Itoa] (int to string).
//
//	i, err := strconv.Atoi("-42")
//	s := strconv.Itoa(-42)
//
// These assume decimal and the Go int type.
//
// [ParseBool], [ParseFloat], [ParseInt], and [ParseUint] convert strings to values:
//

	if e != nil {
		return nil, &PathError{Op: "fork/exec", Path: name, Err: e}
	}

	return newPIDProcess(pid), nil
}

func (p *Process) writeProcFile(file string, data string) error {
	f, e := OpenFile("/proc/"+itoa.Itoa(p.Pid)+"/"+file, O_WRONLY, 0)
	if e != nil {
		return e
	}
	defer f.Close()
	_, e = f.Write([]byte(data))
	return e
}

func (p *Process) signal(sig Signal) error {
	switch p.pidStatus() {

}

func readInterface(i int) (*Interface, error) {
	ifc := &Interface{
		Index: i + 1,                             // Offset the index by one to suit the contract
		Name:  netdir + "/ipifc/" + itoa.Itoa(i), // Name is the full path to the interface path in plan9
	}

	ifcstat := ifc.Name + "/status"
	ifcstatf, err := open(ifcstat)
	if err != nil {
		return nil, err
	}
	defer ifcstatf.close()

		32769,
	}
	t.Run("sendfile-to-unix", func(t *testing.T) {
		for _, size := range sizes {
			t.Run(strconv.Itoa(size), func(t *testing.T) {
				testSendFile(t, "unix", int64(size))
			})
		}
	})
	t.Run("sendfile-to-tcp", func(t *testing.T) {
		for _, size := range sizes {
			t.Run(strconv.Itoa(size), func(t *testing.T) {
				testSendFile(t, "tcp", int64(size))
			})
		}
	})
}