const (
	magicGNU, versionGNU     = "ustar ", " \x00"
	magicUSTAR, versionUSTAR = "ustar\x00", "00"
	trailerSTAR              = "tar\x00"
)

// Size constants from various tar specifications.
const (
	blockSize  = 512 // Size of each block in a tar stream
	nameSize   = 100 // Max length of the name field in USTAR format
	prefixSize = 155 // Max length of the prefix field in USTAR format

}

func TestEqualExhaustive(t *testing.T) {
	var size = 128
	if testing.Short() {
		size = 32
	}
	a := make([]byte, size)
	b := make([]byte, size)
	b_init := make([]byte, size)
	// randomish but deterministic data
	for i := 0; i < size; i++ {
		a[i] = byte(17 * i)
		b_init[i] = byte(23*i + 100)
	}

	for len := 0; len <= size; len++ {
		for x := 0; x <= size-len; x++ {
			for y := 0; y <= size-len; y++ {

	// into the file, so we can't warn here.
	//
	// The most common case is union types, which begin with
	// _Ctype_union and for which typedef[name] is a Go byte
	// array of the appropriate size (such as [4]byte).
	// Substitute those union types with byte arrays.
	for name, id := range goIdent {
		if id.Name == name && strings.Contains(name, "_Ctype_union") {
			if def := typedef[name]; def != nil {

pkg math/bits, func TrailingZeros32(uint32) int
pkg math/bits, func TrailingZeros64(uint64) int
pkg math/bits, func TrailingZeros8(uint8) int
pkg mime, var ErrInvalidMediaParameter error
pkg mime/multipart, type FileHeader struct, Size int64
pkg mime/multipart, var ErrMessageTooLarge error
pkg net, method (*IPConn) SyscallConn() (syscall.RawConn, error)
pkg net, method (*TCPConn) SyscallConn() (syscall.RawConn, error)

For Go 1.23, it defaults to `winreadlinkvolume=1`.
Previous versions default to `winreadlinkvolume=0`.

### Go 1.22

Go 1.22 adds a configurable limit to control the maximum acceptable RSA key size
that can be used in TLS handshakes, controlled by the [`tlsmaxrsasize` setting](/pkg/crypto/tls#Conn.Handshake).
The default is tlsmaxrsasize=8192, limiting RSA to 8192-bit keys. To avoid

pkg syscall (freebsd-riscv64), const CS8 = 768 #53466
pkg syscall (freebsd-riscv64), const CS8 ideal-int #53466
pkg syscall (freebsd-riscv64), const CSIZE = 768 #53466
pkg syscall (freebsd-riscv64), const CSIZE ideal-int #53466
pkg syscall (freebsd-riscv64), const CSTART = 17 #53466
pkg syscall (freebsd-riscv64), const CSTART ideal-int #53466
pkg syscall (freebsd-riscv64), const CSTATUS = 20 #53466

pkg crypto/md5, const BlockSize = 64
pkg crypto/md5, const Size = 16
pkg crypto/sha1, const BlockSize = 64
pkg crypto/sha1, const Size = 20
pkg crypto/sha256, const BlockSize = 64
pkg crypto/sha256, const Size = 32
pkg crypto/sha256, const Size224 = 28
pkg crypto/sha512, const BlockSize = 128
pkg crypto/sha512, const Size = 64
pkg crypto/sha512, const Size384 = 48
pkg crypto/tls, const NoClientCert = 0

Joe Tsai <******@****.***> 1503528984 -0700

		wantValid:    true,
		wantInverted: []sparseEntry{{0, 5000}},
	}, {
		in: []sparseEntry{{1, 0}}, size: 0,
		wantValid: false,
	}, {
		in: []sparseEntry{{-1, 0}}, size: 100,
		wantValid: false,
	}, {
		in: []sparseEntry{{0, -1}}, size: 100,
		wantValid: false,
	}, {
		in: []sparseEntry{{0, 0}}, size: -100,
		wantValid: false,
	}, {

	if ok && len(b.buf) >= size {
		return b
	}
	r := new(Reader)
	r.reset(make([]byte, max(size, minReadBufferSize)), rd)
	return r
}

// NewReader returns a new [Reader] whose buffer has the default size.
func NewReader(rd io.Reader) *Reader {
	return NewReaderSize(rd, defaultBufSize)
}

// Size returns the size of the underlying buffer in bytes.
func (b *Reader) Size() int { return len(b.buf) }