src/share/classes/java/util/zip/Inflater.java

@@ -76,10 +76,12 @@
     private final ZStreamRef zsRef;
     private byte[] buf = defaultBuf;
     private int off, len;
     private boolean finished;
     private boolean needDict;
+    private long bytesRead;
+    private long bytesWritten;
 
     private static final byte[] defaultBuf = new byte[0];
 
     static {
         /* Zip library is loaded from System.initializeSystemClass */

@@ -251,11 +253,15 @@
         if (off < 0 || len < 0 || off > b.length - len) {
             throw new ArrayIndexOutOfBoundsException();
         }
         synchronized (zsRef) {
             ensureOpen();
-            return inflateBytes(zsRef.address(), b, off, len);
+            int thisLen = this.len;
+            int n = inflateBytes(zsRef.address(), b, off, len); 
+            bytesWritten += n;
+            bytesRead += (thisLen - this.len);
+            return n;
         }
     }
 
     /**
      * Uncompresses bytes into specified buffer. Returns actual number

@@ -305,11 +311,11 @@
      * @since 1.5
      */
     public long getBytesRead() {
         synchronized (zsRef) {
             ensureOpen();
-            return getBytesRead(zsRef.address());
+            return bytesRead;
         }
     }
 
     /**
      * Returns the total number of uncompressed bytes output so far.

@@ -331,11 +337,11 @@
      * @since 1.5
      */
     public long getBytesWritten() {
         synchronized (zsRef) {
             ensureOpen();
-            return getBytesWritten(zsRef.address());
+            return bytesWritten;
         }
     }
 
     /**
      * Resets inflater so that a new set of input data can be processed.

@@ -346,10 +352,11 @@
             reset(zsRef.address());
             buf = defaultBuf;
             finished = false;
             needDict = false;
             off = len = 0;
+            bytesRead = bytesWritten = 0;
         }
     }
 
     /**
      * Closes the decompressor and discards any unprocessed input.

@@ -393,10 +400,8 @@
     private native static void setDictionary(long addr, byte[] b, int off,
                                              int len);
     private native int inflateBytes(long addr, byte[] b, int off, int len)
             throws DataFormatException;
     private native static int getAdler(long addr);
-    private native static long getBytesRead(long addr);
-    private native static long getBytesWritten(long addr);
     private native static void reset(long addr);
     private native static void end(long addr);
 }