ActiveGo 1.8Package ioutil
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var (
ErrShortRead = fmt.Errorf("ioutil: short read")
ErrExpectEOF = fmt.Errorf("ioutil: expect EOF")
)
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.
type PageWriter ¶
PageWriter implements the io.Writer interface so that writes will either be in page chunks or from flushing.
type PageWriter struct {
// contains filtered or unexported fields
}
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
func (*PageWriter) Write ¶
func (pw *PageWriter) Write(p []byte) (n int, err error)
type ReaderAndCloser ¶
ReaderAndCloser implements io.ReadCloser interface by combining reader and closer together.
type ReaderAndCloser struct {
io.Reader
io.Closer
}