// from io.Copy.
type writerOnly struct {
	io.Writer
}

// ReadFrom is here to optimize copying from an [*os.File] regular file
// to a [*net.TCPConn] with sendfile, or from a supported src type such
// as a *net.TCPConn on Linux with splice.
func (w *response) ReadFrom(src io.Reader) (n int64, err error) {
	buf := getCopyBuf()
	defer putCopyBuf(buf)

						nongcc = append(nongcc, f)
					}
				}
				return nongcc, gcc
			}
			sfiles, gccfiles = filter(sfiles, sfiles[:0], gccfiles)
		} else {
			for _, sfile := range sfiles {
				data, err := os.ReadFile(filepath.Join(p.Dir, sfile))
				if err == nil {
					if bytes.HasPrefix(data, []byte("TEXT")) || bytes.Contains(data, []byte("\nTEXT")) ||
						bytes.HasPrefix(data, []byte("DATA")) || bytes.Contains(data, []byte("\nDATA")) ||

	EINTR       = syscall.Errno(0x4)
	EINVAL      = syscall.Errno(0x16)
	EIO         = syscall.Errno(0x5)
	EISDIR      = syscall.Errno(0x15)
	EMFILE      = syscall.Errno(0x18)
	EMLINK      = syscall.Errno(0x1f)
	ENFILE      = syscall.Errno(0x17)
	ENODEV      = syscall.Errno(0x13)
	ENOENT      = syscall.Errno(0x2)
	ENOEXEC     = syscall.Errno(0x8)
	ENOMEM      = syscall.Errno(0xc)
	ENOSPC      = syscall.Errno(0x1c)

)

// goModPath returns the module path in the go.mod in dir, if any.
func goModPath(dir string) (path string) {
	return goModPathCache.Do(dir, func() string {
		data, err := os.ReadFile(filepath.Join(dir, "go.mod"))
		if err != nil {
			return ""
		}
		var i int
		if bytes.HasPrefix(data, modulePrefix[1:]) {
			i = 0
		} else {
			i = bytes.Index(data, modulePrefix)

	procReadDirectoryChangesW                                = modkernel32.NewProc("ReadDirectoryChangesW")
	procReadFile                                             = modkernel32.NewProc("ReadFile")
	procReadProcessMemory                                    = modkernel32.NewProc("ReadProcessMemory")
	procReleaseMutex                                         = modkernel32.NewProc("ReleaseMutex")

		return x509.ParseECPrivateKey(b)
	})
}

func loadKey(t *testing.T, filepath string, alg jose.SignatureAlgorithm, unmarshal func([]byte) (interface{}, error)) *jose.JSONWebKey {
	data, err := os.ReadFile(filepath)
	if err != nil {
		t.Fatalf("load file: %v", err)
	}
	block, _ := pem.Decode(data)
	if block == nil {
		t.Fatalf("file contained no PEM encoded data: %s", filepath)
	}

}

// nodeHostsFileContent reads the content of node's hosts file.
func nodeHostsFileContent(hostsFilePath string, hostAliases []v1.HostAlias) ([]byte, error) {
	hostsFileContent, err := os.ReadFile(hostsFilePath)
	if err != nil {
		return nil, err
	}
	var buffer bytes.Buffer
	buffer.WriteString(managedHostsHeaderWithHostNetwork)
	buffer.Write(hostsFileContent)

		{name: "JUMPTABLE", controls: 2, aux: "Sym"},
	}

	archs = append(archs, arch{
		name:               "AMD64",
		pkg:                "cmd/internal/obj/x86",
		genfile:            "../../amd64/ssa.go",
		ops:                AMD64ops,
		blocks:             AMD64blocks,
		regnames:           regNamesAMD64,
		ParamIntRegNames:   "AX BX CX DI SI R8 R9 R10 R11",