Add a method to expose whether the stream is positioned at the end of a BGZF block.

Author: tomwhite

src/java/htsjdk/samtools/util/BlockCompressedInputStream.java

@@ -132,6 +132,14 @@ public int available()
         return mCurrentBlock.length - mCurrentOffset;
     }
 
+    /**
+     * @return <code>true</code> if the stream is at the end of a BGZF block,
+     * <code>false</code> otherwise.
+     */
+    public boolean endOfBlock() {
+        return (mCurrentBlock != null && mCurrentOffset == mCurrentBlock.length);
+    }
+
     /**
      * Closes the underlying InputStream or RandomAccessFile
      */