func (r *Reader) Read(b []byte) (n int, err error) {
	if r.i >= int64(len(r.s)) {
		return 0, io.EOF
	}
	r.prevRune = -1
	n = copy(b, r.s[r.i:])
	r.i += int64(n)
	return
}

// ReadAt implements the [io.ReaderAt] interface.
func (r *Reader) ReadAt(b []byte, off int64) (n int, err error) {
	// cannot modify state - see io.ReaderAt
	if off < 0 {

func HalfReader(r io.Reader) io.Reader { return &halfReader{r} }

type halfReader struct {
	r io.Reader
}

func (r *halfReader) Read(p []byte) (int, error) {
	return r.r.Read(p[0 : (len(p)+1)/2])
}

// DataErrReader changes the way errors are handled by a Reader. Normally, a
// Reader returns an error (typically EOF) from the first Read call after the
// last piece of data is read. DataErrReader wraps a Reader and changes its

	return 0, r.error
}

func (r errorReader) ReadAt(p []byte, off int64) (n int, err error) {
	return 0, r.error
}

func (r errorReader) Seek(offset int64, whence int) (int64, error) {
	return 0, r.error
}

func (r errorReader) Close() error {
	return r.error
}

// readSeekerFromReader converts an io.Reader into an io.ReadSeeker.
// In general Seek may not be efficient, but it is optimized for

// that provides an optimized implementation of [ReadDir].
type ReadDirFS interface {
	FS

	// ReadDir reads the named directory
	// and returns a list of directory entries sorted by filename.
	ReadDir(name string) ([]DirEntry, error)
}

// ReadDir reads the named directory
// and returns a list of directory entries sorted by filename.
//
// If fs implements [ReadDirFS], ReadDir calls fs.ReadDir.

}

// Calling Close does not close the wrapped [io.Reader] originally passed to [NewReader].
// In order for the ZLIB checksum to be verified, the reader must be
// fully consumed until the [io.EOF].
func (z *reader) Close() error {
	if z.err != nil && z.err != io.EOF {
		return z.err
	}
	z.err = z.decompressor.Close()
	return z.err
}

func (z *reader) Reset(r io.Reader, dict []byte) error {

//
//	// Now, we need an io.Reader that can access
//	// the ETag computed over the content.
//	reader := etag.Wrap(encryptedContent, content)
func Wrap(wrapped, content io.Reader) io.Reader {
	if t, ok := content.(Tagger); ok {
		return wrapReader{
			Reader: wrapped,
			Tagger: t,
		}
	}
	return wrapReader{
		Reader: wrapped,
	}
}

// A Reader wraps an io.Reader and computes the

	"runtime"
	"sync"
	"unicode/utf8"

	csv "github.com/minio/csvparser"
	"github.com/minio/minio/internal/s3select/sql"
)

// Reader - CSV record reader for S3Select.
type Reader struct {
	args         *ReaderArgs
	readCloser   io.ReadCloser    // raw input
	buf          *bufio.Reader    // input to the splitter
	columnNames  []string         // names of columns
	nameIndexMap map[string]int64 // name to column index

// NewMonitoredReader returns reference to a monitored reader that throttles reads to configured bandwidth for the
// bucket.
func NewMonitoredReader(ctx context.Context, m *Monitor, r io.Reader, opts *MonitorReaderOptions) *MonitoredReader {
	reader := MonitoredReader{
		r:        r,
		throttle: m.throttle(opts.BucketOptions),
		m:        m,
		opts:     opts,
		ctx:      ctx,
	}
	reader.m.init(opts.BucketOptions)
	return &reader

	"fmt"
	"io"

	"internal/trace/event"
	"internal/trace/version"
)

// Reader parses trace bytes with only very basic validation
// into an event stream.
type Reader struct {
	r     *bufio.Reader
	v     version.Version
	specs []event.Spec
}

// NewReader creates a new reader for the trace wire format.
func NewReader(r io.Reader) (*Reader, error) {
	br := bufio.NewReader(r)
	v, err := version.ReadHeader(br)

// is a *[Reader].
func NewReader(r io.Reader, order Order, litWidth int) io.ReadCloser {
	return newReader(r, order, litWidth)
}

func newReader(src io.Reader, order Order, litWidth int) *Reader {
	r := new(Reader)
	r.init(src, order, litWidth)
	return r
}

func (r *Reader) init(src io.Reader, order Order, litWidth int) {
	switch order {
	case LSB: