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/*
* Buffering Filter
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_BUFFERING_FILTER_H__
#define BOTAN_BUFFERING_FILTER_H__
#include <botan/filter.h>
namespace Botan {
/**
* Buffering_Filter: This class represents filters for operations that
* maintain an internal state.
*/
class BOTAN_DLL Buffering_Filter : public Filter
{
public:
void write(const byte[], u32bit);
virtual void end_msg();
Buffering_Filter(u32bit, u32bit = 0);
virtual ~Buffering_Filter() {}
protected:
virtual void initial_block(const byte[]) {}
virtual void main_block(const byte[]) = 0;
virtual void final_block(const byte[], u32bit) = 0;
private:
const u32bit INITIAL_BLOCK_SIZE, BLOCK_SIZE;
SecureVector<byte> initial, block;
u32bit initial_block_pos, block_pos;
};
}
#endif
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