/
encoder.go
56 lines (44 loc) · 1.03 KB
/
encoder.go
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package zlib
import (
"compress/zlib"
"io"
"github.com/pkg/errors"
"github.com/mickep76/compress"
)
type encoder struct {
writer io.WriteCloser
level int
}
func (a *algorithm) NewEncoder(w io.Writer, opts ...compress.EncoderOption) (compress.Encoder, error) {
e := &encoder{}
for _, opt := range opts {
if err := opt(e); err != nil {
return nil, err
}
}
if e.level == 0 {
e.writer = zlib.NewWriter(w)
} else {
var err error
if e.writer, err = zlib.NewWriterLevel(w, e.level); err != nil {
return nil, err
}
}
return e, nil
}
func (e *encoder) SetEndian(endian compress.Endian) error {
return errors.Wrap(compress.ErrUnsupportedOption, "algorithm zlib")
}
func (e *encoder) SetLitWidth(width int) error {
return errors.Wrap(compress.ErrUnsupportedOption, "algorithm zlib")
}
func (e *encoder) SetLevel(level compress.Level) error {
e.level = int(level)
return nil
}
func (e *encoder) Write(v []byte) (int, error) {
return e.writer.Write(v)
}
func (e *encoder) Close() error {
return e.writer.Close()
}