io

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)