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#ifndef CRYPTOPP_BASECODE_H
#define CRYPTOPP_BASECODE_H
#include "filters.h"
#include "algparam.h"
#include "argnames.h"
NAMESPACE_BEGIN(CryptoPP)
//! base n encoder, where n is a power of 2
class CRYPTOPP_DLL BaseN_Encoder : public Unflushable<Filter>
{
public:
BaseN_Encoder(BufferedTransformation *attachment=NULL)
{Detach(attachment);}
BaseN_Encoder(const byte *alphabet, int log2base, BufferedTransformation *attachment=NULL, int padding=-1)
{
Detach(attachment);
IsolatedInitialize(MakeParameters(Name::EncodingLookupArray(), alphabet)
(Name::Log2Base(), log2base)
(Name::Pad(), padding != -1)
(Name::PaddingByte(), byte(padding)));
}
void IsolatedInitialize(const NameValuePairs ¶meters);
size_t Put2(const byte *begin, size_t length, int messageEnd, bool blocking);
private:
const byte *m_alphabet;
int m_padding, m_bitsPerChar, m_outputBlockSize;
int m_bytePos, m_bitPos;
SecByteBlock m_outBuf;
};
//! base n decoder, where n is a power of 2
class CRYPTOPP_DLL BaseN_Decoder : public Unflushable<Filter>
{
public:
BaseN_Decoder(BufferedTransformation *attachment=NULL)
{Detach(attachment);}
BaseN_Decoder(const int *lookup, int log2base, BufferedTransformation *attachment=NULL)
{
Detach(attachment);
IsolatedInitialize(MakeParameters(Name::DecodingLookupArray(), lookup)(Name::Log2Base(), log2base));
}
void IsolatedInitialize(const NameValuePairs ¶meters);
size_t Put2(const byte *begin, size_t length, int messageEnd, bool blocking);
static void CRYPTOPP_API InitializeDecodingLookupArray(int *lookup, const byte *alphabet, unsigned int base, bool caseInsensitive);
private:
const int *m_lookup;
int m_padding, m_bitsPerChar, m_outputBlockSize;
int m_bytePos, m_bitPos;
SecByteBlock m_outBuf;
};
//! filter that breaks input stream into groups of fixed size
class CRYPTOPP_DLL Grouper : public Bufferless<Filter>
{
public:
Grouper(BufferedTransformation *attachment=NULL)
{Detach(attachment);}
Grouper(int groupSize, const std::string &separator, const std::string &terminator, BufferedTransformation *attachment=NULL)
{
Detach(attachment);
IsolatedInitialize(MakeParameters(Name::GroupSize(), groupSize)
(Name::Separator(), ConstByteArrayParameter(separator))
(Name::Terminator(), ConstByteArrayParameter(terminator)));
}
void IsolatedInitialize(const NameValuePairs ¶meters);
size_t Put2(const byte *begin, size_t length, int messageEnd, bool blocking);
private:
SecByteBlock m_separator, m_terminator;
size_t m_groupSize, m_counter;
};
NAMESPACE_END
#endif
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