// Copyright 2008, Google Inc.
//
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// modification, are permitted provided that the following conditions are met:
//
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//     this list of conditions and the following disclaimer.
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#ifndef GEARS_BLOB_BLOB_INPUT_STREAM_SF__
#define GEARS_BLOB_BLOB_INPUT_STREAM_SF__

#import <Foundation/NSStream.h>

#include "gears/base/common/common.h"

class BlobInterface;

// BlobInputStream provides an NSInputStream interface for blobs.
@interface BlobInputStream : NSInputStream {
 @private
  BlobInterface* blob_;
  int64 offset_;
  id delegate_;  // WEAK, not retained

  // Since various undocumented methods get called on a stream, we'll
  // use a 1-byte dummy stream object to handle all unexpected messages.
  NSInputStream *dummy_stream_;
  NSData *dummy_data_;
}

#pragma mark Public Instance methods

// Initializes a BlobInputStream with a blob.
- (id)initFromBlob:(BlobInterface *)blob;

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

@end
#endif  // GEARS_BLOB_BLOB_INPUT_STREAM_SF__