[VOL-1386] This commit add "dep" as the package management tool
for voltha-go.
Change-Id: I52bc4911dd00a441756ec7c30f46d45091f3f90e
diff --git a/vendor/github.com/Shopify/sarama/compress.go b/vendor/github.com/Shopify/sarama/compress.go
new file mode 100644
index 0000000..94b716e
--- /dev/null
+++ b/vendor/github.com/Shopify/sarama/compress.go
@@ -0,0 +1,75 @@
+package sarama
+
+import (
+ "bytes"
+ "compress/gzip"
+ "fmt"
+ "sync"
+
+ "github.com/eapache/go-xerial-snappy"
+ "github.com/pierrec/lz4"
+)
+
+var (
+ lz4WriterPool = sync.Pool{
+ New: func() interface{} {
+ return lz4.NewWriter(nil)
+ },
+ }
+
+ gzipWriterPool = sync.Pool{
+ New: func() interface{} {
+ return gzip.NewWriter(nil)
+ },
+ }
+)
+
+func compress(cc CompressionCodec, level int, data []byte) ([]byte, error) {
+ switch cc {
+ case CompressionNone:
+ return data, nil
+ case CompressionGZIP:
+ var (
+ err error
+ buf bytes.Buffer
+ writer *gzip.Writer
+ )
+ if level != CompressionLevelDefault {
+ writer, err = gzip.NewWriterLevel(&buf, level)
+ if err != nil {
+ return nil, err
+ }
+ } else {
+ writer = gzipWriterPool.Get().(*gzip.Writer)
+ defer gzipWriterPool.Put(writer)
+ writer.Reset(&buf)
+ }
+ if _, err := writer.Write(data); err != nil {
+ return nil, err
+ }
+ if err := writer.Close(); err != nil {
+ return nil, err
+ }
+ return buf.Bytes(), nil
+ case CompressionSnappy:
+ return snappy.Encode(data), nil
+ case CompressionLZ4:
+ writer := lz4WriterPool.Get().(*lz4.Writer)
+ defer lz4WriterPool.Put(writer)
+
+ var buf bytes.Buffer
+ writer.Reset(&buf)
+
+ if _, err := writer.Write(data); err != nil {
+ return nil, err
+ }
+ if err := writer.Close(); err != nil {
+ return nil, err
+ }
+ return buf.Bytes(), nil
+ case CompressionZSTD:
+ return zstdCompressLevel(nil, data, level)
+ default:
+ return nil, PacketEncodingError{fmt.Sprintf("unsupported compression codec (%d)", cc)}
+ }
+}