package secio

import "gvisor.dev/gvisor/pkg/secio"

Package secio provides support for sectioned I/O.

Index ¶

• Variables
• type FullReader
• func (r FullReader) Read(dst []byte) (int, error)
• type SectionReader
• func NewOffsetReader(r io.ReaderAt, off int64) *SectionReader
• func NewSectionReader(r io.ReaderAt, off int64, n int64) *SectionReader
• func (r *SectionReader) Read(dst []byte) (int, error)
• type SectionWriter
• func NewOffsetWriter(w io.WriterAt, off int64) *SectionWriter
• func NewSectionWriter(w io.WriterAt, off int64, n int64) *SectionWriter
• func (w *SectionWriter) Write(src []byte) (int, error)

Variables ¶

var ErrReachedLimit = errors.New("reached limit")

ErrReachedLimit is returned when SectionReader.Read or SectionWriter.Write reaches its limit.

Types ¶

type FullReader ¶

type FullReader struct {
	Reader io.Reader
}

FullReader adapts an io.Reader to never return partial reads with a nil error.

func (FullReader) Read ¶

func (r FullReader) Read(dst []byte) (int, error)

Read implements io.Reader.Read.

type SectionReader ¶

type SectionReader struct {
	// contains filtered or unexported fields
}

SectionReader implements io.Reader on a section of an underlying io.ReaderAt. It is similar to io.SectionReader, but:

• Reading beyond the limit returns ErrReachedLimit, not io.EOF.

• Limit overflow is handled correctly.

func NewOffsetReader ¶

func NewOffsetReader(r io.ReaderAt, off int64) *SectionReader

NewOffsetReader returns an io.Reader that reads from r starting at offset off.

func NewSectionReader ¶

func NewSectionReader(r io.ReaderAt, off int64, n int64) *SectionReader

NewSectionReader returns an io.Reader that reads from r starting at offset off and stops with ErrReachedLimit after n bytes.

func (*SectionReader) Read ¶

func (r *SectionReader) Read(dst []byte) (int, error)

Read implements io.Reader.Read.

type SectionWriter ¶

type SectionWriter struct {
	// contains filtered or unexported fields
}

SectionWriter implements io.Writer on a section of an underlying io.WriterAt. Writing beyond the limit returns ErrReachedLimit.

func NewOffsetWriter ¶

func NewOffsetWriter(w io.WriterAt, off int64) *SectionWriter

NewOffsetWriter returns an io.Writer that writes to w starting at offset off.

func NewSectionWriter ¶

func NewSectionWriter(w io.WriterAt, off int64, n int64) *SectionWriter

NewSectionWriter returns an io.Writer that writes to w starting at offset off and stops with ErrReachedLimit after n bytes.

func (*SectionWriter) Write ¶

func (w *SectionWriter) Write(src []byte) (int, error)

Write implements io.Writer.Write.

Source Files ¶

full_reader.go secio.go