// writeBuf writes the [Reader]'s buffer to the writer.
func (b *Reader) writeBuf(w io.Writer) (int64, error) {
	n, err := w.Write(b.buf[b.r:b.w])
	if n < 0 {
		panic(errNegativeWrite)
	}
	b.r += n
	return int64(n), err
}

// buffered output

// Writer implements buffering for an [io.Writer] object.

xlHeaderVersion version == 1:

```
//msgp:tuple xlMetaV2VersionHeader
type xlMetaV2VersionHeader struct {
 VersionID [16]byte  // Version UUID, raw.
 ModTime   int64     // Unix nanoseconds.
 Signature [4]byte   // Signature of metadata.
 Type      uint8     // Type if the version
 Flags     uint8
}
```

The following flags are defined:

```
const (

			if part > 0 {
				cs = ""
			}
			if typ.Is(ChecksumIncludesMultipart) {
				wantLen := int(t) * length
				if len(b) < wantLen {
					break
				}
				// Read part checksum
				if part > 0 && uint64(part) <= t {
					offset := (part - 1) * length
					partCs := b[offset:]
					cs = base64.StdEncoding.EncodeToString(partCs[:length])
				}
				b = b[wantLen:]
			}
		} else if part > 1 {

func parseChunkSignature(chunk []byte) []byte {
	chunkSplits := bytes.SplitN(chunk, []byte(s3ChunkSignatureStr), 2)
	return chunkSplits[1]
}

// parse hex to uint64.
func parseHexUint(v []byte) (n uint64, err error) {
	for i, b := range v {
		switch {
		case '0' <= b && b <= '9':
			b -= '0'
		case 'a' <= b && b <= 'f':
			b = b - 'a' + 10
		case 'A' <= b && b <= 'F':

		if !c.Args().Present() {
			cli.ShowAppHelpAndExit(c, 1) // last argument is exit code
		}

		ht := make(map[string]map[string]any)
		file := c.Args().Get(0)
		if strings.HasSuffix(file, ".zip") {
			var sz int64
			f, err := os.Open(file)
			if err != nil {
				return err
			}
			if st, err := f.Stat(); err == nil {
				sz = st.Size()
			}
			defer f.Close()
			zr, err := zip.NewReader(f, sz)
			if err != nil {

	"errors"
	"fmt"
	"reflect"
	"sort"
	"strings"

	"gorm.io/gorm/clause"
	"gorm.io/gorm/logger"
	"gorm.io/gorm/schema"
)

type result struct {
	Result       sql.Result
	RowsAffected int64
}

func (info *result) ModifyStatement(stmt *Statement) {
	stmt.Result = info
}

// Build implements clause.Expression interface
func (result) Build(clause.Builder) {
}

func WithResult() *result {

	Fatal(...any)
}

func openTestFile(t tester, file string) []byte {
	f, err := os.ReadFile("testdata/testdata.zip")
	if err != nil {
		t.Fatal(err)
	}
	z, err := zip.NewReader(bytes.NewReader(f), int64(len(f)))
	if err != nil {
		t.Fatal(err)
	}
	for _, f := range z.File {
		if f.Name == file {
			rc, err := f.Open()
			if err != nil {
				t.Fatal(err)
			}
			defer rc.Close()

			if e != nil {
				return nil, e
			}
			buf = bytes.NewBuffer(b)
		}

		return buf.Bytes(), nil
	}

	fmt.Println("{")

	hasWritten := false
	var r io.Reader
	var sz int64
	f, e := os.Open(downloadPath)
	if e != nil {
		return e
	}
	if st, e := f.Stat(); e == nil {
		sz = st.Size()
	}
	defer f.Close()
	r = f

	zr, e := zip.NewReader(r.(io.ReaderAt), sz)

	opts Opts

	// Once can be used to initialize values for lazy initialization.
	// Should be set before calling Get().
	Once sync.Once

	// Managed values.
	val          atomic.Pointer[T]
	lastUpdateMs atomic.Int64
	updating     sync.Mutex
}

// New allocates a new cached value instance. Tt must be initialized with
// `.TnitOnce`.
func New[T any]() *Cache[T] {
	return &Cache[T]{}
}

		return err
	}

	configCommonToSrvCtx(cfCommon, ctxt)

	v, err := env.GetInt(EnvErasureSetDriveCount, 0)
	if err != nil {
		return err
	}
	setDriveCount := uint64(v)

	var pools []poolArgs
	switch cv.Version {
	case "v1":
		cfV1 := config.ServerConfigV1{}
		if err = yaml.Unmarshal(rd, &cfV1); err != nil {
			return err
		}