Use non-JNI method for read(byte[])

Author: xerial

src/main/java/org/xerial/snappy/SnappyInputStream.java

@@ -157,10 +157,27 @@ protected void readFully(byte[] fragment, int fragmentLength)
      * @see java.io.InputStream#read(byte[], int, int)
      */
     @Override
-    public int read(byte[] b, int off, int len)
+    public int read(byte[] b, int byteOffset, int byteLength)
             throws IOException
     {
-        return rawRead(b, off, len);
+        int writtenBytes = 0;
+        for (; writtenBytes < byteLength; ) {
+
+            if (uncompressedCursor >= uncompressedLimit) {
+                if (hasNextChunk()) {
+                    continue;
+                }
+                else {
+                    return writtenBytes == 0 ? -1 : writtenBytes;
+                }
+            }
+            int bytesToWrite = Math.min(uncompressedLimit - uncompressedCursor, byteLength - writtenBytes);
+            System.arraycopy(uncompressed, uncompressedCursor, b, byteOffset + writtenBytes, bytesToWrite);
+            writtenBytes += bytesToWrite;
+            uncompressedCursor += bytesToWrite;
+        }
+
+        return writtenBytes;
     }
 
     /**