func MustClose(c io.Closer)
MustClose closes Closer c and calls log.Fatal if it returns a non-nil error.
func MustWriter(w io.Writer) io.Writer
MustWriter returns a Writer that wraps the provided Writer, except that it calls log.Fatal instead of returning a non-nil error.
Reader implements a seekable buffered io.Reader.
type Reader struct {
*bufio.Reader
// contains filtered or unexported fields
}
func NewReader(f *os.File) *Reader
NewReader returns a Reader from an open file.
func Open(name string) (*Reader, error)
Open returns a Reader for the file named name.
func (r *Reader) Close() error
func (r *Reader) File() *os.File
func (r *Reader) MustSeek(offset int64, whence int) int64
func (r *Reader) Offset() int64
func (r *Reader) Slice(length uint64) ([]byte, bool, error)
Slice reads the next length bytes of r into a slice.
This slice may be backed by mmap'ed memory. Currently, this memory will never be unmapped. The second result reports whether the backing memory is read-only.
func (r *Reader) SliceRO(length uint64) []byte
SliceRO returns a slice containing the next length bytes of r backed by a read-only mmap'd data. If the mmap cannot be established (limit exceeded, region too small, etc) a nil slice will be returned. If mmap succeeds, it will never be unmapped.
Writer implements a seekable buffered io.Writer.
type Writer struct {
*bufio.Writer
// contains filtered or unexported fields
}
func Create(name string) (*Writer, error)
Create creates the file named name and returns a Writer for that file.
func (w *Writer) Close() error
func (w *Writer) File() *os.File
func (w *Writer) MustSeek(offset int64, whence int) int64
func (w *Writer) Offset() int64