// 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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//     used to endorse or promote products derived from this software without
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#ifndef GEARS_BLOB_BUFFER_BLOB_H__
#define GEARS_BLOB_BUFFER_BLOB_H__

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

#include <vector>
#include "gears/blob/blob_interface.h"

// Because BufferBlobs store their contents in a vector, they are restricted in
// size by the maximum value of int.
class BufferBlob : public BlobInterface {
 public:
  // Initialize a BufferBlob from the contents of a vector.
  // It performs a vector::swap, so that no copy is made.
  // The vector argument is an in/out parameter, and will be returned empty.
  BufferBlob(std::vector<uint8> *buffer);

  // Initializes a BufferBlob from an arbitrary array of bytes.
  // The bytes are copied.
  BufferBlob(const void *source, int64 num_bytes);

  int64 Read(uint8 *destination, int64 offset, int64 max_bytes) const;

  int64 Length() const;

 private:
  typedef std::vector<uint8> BufferType;
  typedef BufferType::size_type size_type;
  BufferType buffer_;

  DISALLOW_EVIL_CONSTRUCTORS(BufferBlob);
};

#endif  // not OFFICIAL_BUILD

#endif  // GEARS_BLOB_BUFFER_BLOB_H__