io

Documentation

Index

• Variables
• func ByteHead()
• func CloseReaderIf(r io.Reader) error
• func CloseWriterIf(w io.Writer) error
• func FprintGzip(w io.Writer, r io.Reader) (n int64, err error)
• func Head(r io.Reader, n int) ([]byte, error)
• func PrintGzip(r io.Reader) (n int64, err error)
• func ReadCloser(filename string) (io.ReadCloser, error)
• func ReadGzip(dst io.Writer, src io.Reader) (n int64, err error)

Variables

var (
	DefaultHeadLength int = 5

	ReplacementChar rune = unicode.ReplacementChar
)

Functions

func ByteHead

func ByteHead()

func CloseReaderIf

func CloseReaderIf(r io.Reader) error

CloseReaderIf checks a reader to see if it also has a close method. If so, it calls r.Close(). Useful for places where any io.Reader can be used, but a file (or other ReadCloser that requires closing) may be substituted.

func CloseWriterIf

func CloseWriterIf(w io.Writer) error

CloseWriterIf checks a writer to see if it also has a close method. If so, it calls r.Close(). Useful for places where any io.Writer can be used, but a file (or other WriteCloser that requires closing) may be substituted.

func FprintGzip

func FprintGzip(w io.Writer, r io.Reader) (n int64, err error)

func Head

func Head(r io.Reader, n int) ([]byte, error)

Head returns an io.Reader that always returns the first n lines of a source reader

func PrintGzip

func PrintGzip(r io.Reader) (n int64, err error)

func ReadCloser

func ReadCloser(filename string) (io.ReadCloser, error)

ReadCloser returns an io.ReadCloser from a file. The caller is responsible for closing the file when finished with it.

func ReadGzip

func ReadGzip(dst io.Writer, src io.Reader) (n int64, err error)