// Copyright 2008, Google Inc.
//
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//
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//     this list of conditions and the following disclaimer.
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//     this list of conditions and the following disclaimer in the documentation
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//     used to endorse or promote products derived from this software without
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#ifndef GEARS_BLOB_BLOB_INPUT_STREAM_FF_H__
#define GEARS_BLOB_BLOB_INPUT_STREAM_FF_H__

#ifdef OFFICIAL_BUILD
// The blob API has not been finalized for official builds
#else

#include <nsIInputStream.h>
#include "gears/base/common/scoped_refptr.h"

class BlobInterface;

// BlobInputStream provides an nsIInputStream interface for blobs.
class BlobInputStream : public nsIInputStream {
 public:
  BlobInputStream();
  explicit BlobInputStream(BlobInterface *blob);
  virtual ~BlobInputStream();

  // Replaces the stream's current blob (if any) with the argument.
  // The argument can be NULL.
  void Reset(BlobInterface *blob);

  NS_DECL_ISUPPORTS
  NS_DECL_NSIINPUTSTREAM

 private:
  scoped_refptr<BlobInterface> blob_;
  int64 offset_;

  DISALLOW_EVIL_CONSTRUCTORS(BlobInputStream);
};

#endif  // not OFFICIAL_BUILD

#endif  // GEARS_BLOB_BLOB_INPUT_STREAM_FF_H__