Added AppendGzipBytesLevel for gzipping with desired compression level

1 files changed, 16 insertions, 3 deletions

diff --git a/compress.go b/compress.go
index 033bb60..f619cdd 100644
--- a/compress.go
+++ b/compress.go
@@ -108,15 +108,28 @@ var gzipWriterPoolMap = func() map[int]*sync.Pool {
 	return m
 }()
 
-// AppendGzipBytes appends gzipped src to dst and returns the resulting dst.
-func AppendGzipBytes(dst, src []byte) []byte {
+// AppendGzipBytesLevel appends gzipped src to dst using the given
+// compression level and returns the resulting dst.
+//
+// Supported compression levels are:
+//
+//    * CompressNoCompression
+//    * CompressBestSpeed
+//    * CompressBestCompression
+//    * CompressDefaultCompression
+func AppendGzipBytesLevel(dst, src []byte, level int) []byte {
 	w := &byteSliceWriter{dst}
-	zw := acquireGzipWriter(w, CompressDefaultCompression)
+	zw := acquireGzipWriter(w, level)
 	zw.Write(src)
 	releaseGzipWriter(zw)
 	return w.b
 }
 
+// AppendGzipBytes appends gzipped src to dst and returns the resulting dst.
+func AppendGzipBytes(dst, src []byte) []byte {
+	return AppendGzipBytesLevel(dst, src, CompressDefaultCompression)
+}
+
 // AppendGunzipBytes append gunzipped src to dst and returns the resulting dst.
 func AppendGunzipBytes(dst, src []byte) ([]byte, error) {
 	r := &byteSliceReader{src}