// Work distrubutes and manages the work. If any processing results in an
// error, the errCnt is incremented and a ErrProcess is returned. For more
// details the errs map can be checked. The key for the errs map is the
// filename that had the error.
//
// For compression operations, if the format specified is unknown or not
// supported, either compress.Unknown or a peu.Unsupported error will be
// returned.
func (w *Worker) Work() error {
// make sure concurrency is at least 1
if w.concurrency < 1 {
w.concurrency = 1
}
if w.decompress {
return w.Decompress()
}
w.Format = compress.ParseFormat(w.format)
return w.Compress()
}
// Compress is the handler for compression. Bytes read is returned along with
// any non io.EOF error that may have occurred.
func Compress(format string, r io.Reader, w io.Writer) (int64, error) {
if format == "" {
return 0, ErrNoFormat
}
f := compress.ParseFormat(format)
switch f {
case compress.LZ4:
return CompressLZ4(r, w)
case compress.GZip:
return CompressGZip(r, w)
default:
return 0, ErrUnsupported
}
}