package ioutil

import "go.etcd.io/etcd/pkg/v3/ioutil"

Package ioutil implements I/O utility functions.

Index ¶

• Variables
• func NewExactReadCloser(rc io.ReadCloser, totalBytes int64) io.ReadCloser
• func NewLimitedBufferReader(r io.Reader, n int) io.Reader
• func WriteAndSyncFile(filename string, data []byte, perm os.FileMode) error
• type PageWriter
• func NewPageWriter(w io.Writer, pageBytes, pageOffset int) *PageWriter
• func (pw *PageWriter) Flush() error
• func (pw *PageWriter) FlushN() (int, error)
• func (pw *PageWriter) Write(p []byte) (n int, err error)
• type ReaderAndCloser

Variables ¶

var (
	ErrShortRead = fmt.Errorf("ioutil: short read")
	ErrExpectEOF = fmt.Errorf("ioutil: expect EOF")
)

Functions ¶

func NewExactReadCloser ¶

func NewExactReadCloser(rc io.ReadCloser, totalBytes int64) io.ReadCloser

NewExactReadCloser returns a ReadCloser that returns errors if the underlying reader does not read back exactly the requested number of bytes.

func NewLimitedBufferReader ¶

func NewLimitedBufferReader(r io.Reader, n int) io.Reader

NewLimitedBufferReader returns a reader that reads from the given reader but limits the amount of data returned to at most n bytes.

func WriteAndSyncFile ¶

func WriteAndSyncFile(filename string, data []byte, perm os.FileMode) error

WriteAndSyncFile behaves just like ioutil.WriteFile in the standard library, but calls Sync before closing the file. WriteAndSyncFile guarantees the data is synced if there is no error returned.

Types ¶

type PageWriter ¶

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

PageWriter implements the io.Writer interface so that writes will either be in page chunks or from flushing.

func NewPageWriter ¶

func NewPageWriter(w io.Writer, pageBytes, pageOffset int) *PageWriter

NewPageWriter creates a new PageWriter. pageBytes is the number of bytes to write per page. pageOffset is the starting offset of io.Writer.

func (*PageWriter) Flush ¶

func (pw *PageWriter) Flush() error

Flush flushes buffered data.

func (*PageWriter) FlushN ¶

func (pw *PageWriter) FlushN() (int, error)

FlushN flushes buffered data and returns the number of written bytes.

func (*PageWriter) Write ¶

func (pw *PageWriter) Write(p []byte) (n int, err error)

type ReaderAndCloser ¶

type ReaderAndCloser struct {
	io.Reader
	io.Closer
}

ReaderAndCloser implements io.ReadCloser interface by combining reader and closer together.

Source Files ¶

pagewriter.go readcloser.go reader.go util.go