import quincy 17.2.0

[ceph.git] / ceph / src / arrow / go / parquet / compress / snappy.go

diff --git a/ceph/src/arrow/go/parquet/compress/snappy.go b/ceph/src/arrow/go/parquet/compress/snappy.go
new file mode 100644 (file)
index 0000000..6468df7
--- /dev/null
+++ b/ceph/src/arrow/go/parquet/compress/snappy.go
@@ -0,0 +1,62 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package compress
+
+import (
+       "io"
+       "io/ioutil"
+
+       "github.com/golang/snappy"
+)
+
+type snappyCodec struct{}
+
+func (snappyCodec) Encode(dst, src []byte) []byte {
+       return snappy.Encode(dst, src)
+}
+
+func (snappyCodec) EncodeLevel(dst, src []byte, _ int) []byte {
+       return snappy.Encode(dst, src)
+}
+
+func (snappyCodec) Decode(dst, src []byte) []byte {
+       dst, err := snappy.Decode(dst, src)
+       if err != nil {
+               panic(err)
+       }
+       return dst
+}
+
+func (snappyCodec) NewReader(r io.Reader) io.ReadCloser {
+       return ioutil.NopCloser(snappy.NewReader(r))
+}
+
+func (snappyCodec) CompressBound(len int64) int64 {
+       return int64(snappy.MaxEncodedLen(int(len)))
+}
+
+func (snappyCodec) NewWriter(w io.Writer) io.WriteCloser {
+       return snappy.NewBufferedWriter(w)
+}
+
+func (s snappyCodec) NewWriterLevel(w io.Writer, _ int) (io.WriteCloser, error) {
+       return s.NewWriter(w), nil
+}
+
+func init() {
+       codecs[Codecs.Snappy] = snappyCodec{}
+}