// NewReader creates a new Reader reading the given reader.
func NewReader(r io.Reader) (io.ReadCloser, error) {
z := &reader{
r: r,
h: xxhash.New(0),
}
if err := z.readFrame(); err != nil {
return nil, err
}
return z, nil
}
// NewWriterLevel is like NewWriter but specifies the compression level instead
// of assuming the default compression level.
func NewWriterLevel(w io.Writer, level int) (io.WriteCloser, error) {
if level < defaultCompression || level > BestCompression {
return nil, fmt.Errorf("lz4: invalid compression level: %d", level)
}
return &writer{
level: level,
w: w,
h: xxhash.New(0),
}, nil
}
// newBitReader returns a new bitReader reading from r. If r is not
// already an io.ByteReader, it will be converted via a bufio.Reader.
func newBitReader(r io.Reader) bitReader {
br, ok := r.(io.ByteReader)
if !ok {
br = bufio.NewReader(r)
}
return bitReader{
r: br,
h: xxhash.New(0),
}
}