basecode.h

#ifndef CRYPTOPP_BASECODE_H
#define CRYPTOPP_BASECODE_H

#include "filters.h"
#include "algparam.h"

NAMESPACE_BEGIN(CryptoPP)

class BaseN_Encoder : public Unflushable<Filter>
{
public:
        BaseN_Encoder(BufferedTransformation *attachment=NULL)
                : Unflushable<Filter>(attachment) {}

        BaseN_Encoder(const byte *alphabet, int log2base, BufferedTransformation *attachment=NULL, int padding=-1)
                : Unflushable<Filter>(attachment)
        {
                IsolatedInitialize(MakeParameters("EncodingLookupArray", alphabet)
                        ("Log2Base", log2base)
                        ("Pad", padding != -1)
                        ("PaddingByte", byte(padding)));
        }

        void IsolatedInitialize(const NameValuePairs &parameters);
        unsigned int Put2(const byte *begin, unsigned int 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;
};

class BaseN_Decoder : public Unflushable<Filter>
{
public:
        BaseN_Decoder(BufferedTransformation *attachment=NULL)
                : Unflushable<Filter>(attachment) {}

        BaseN_Decoder(const int *lookup, int log2base, BufferedTransformation *attachment=NULL)
                : Unflushable<Filter>(attachment)
        {
                IsolatedInitialize(MakeParameters("DecodingLookupArray", lookup)("Log2Base", log2base));
        }

        void IsolatedInitialize(const NameValuePairs &parameters);
        unsigned int Put2(const byte *begin, unsigned int length, int messageEnd, bool blocking);

        static void InitializeDecodingLookupArray(int *lookup, const byte *alphabet, unsigned int log2base, bool caseInsensitive);

private:
        const int *m_lookup;
        int m_padding, m_bitsPerChar, m_outputBlockSize;
        int m_bytePos, m_bitPos;
        SecByteBlock m_outBuf;
};

class Grouper : public Bufferless<Filter>
{
public:
        Grouper(BufferedTransformation *attachment=NULL)
                : Bufferless<Filter>(attachment) {}

        Grouper(int groupSize, const std::string &separator, const std::string &terminator, BufferedTransformation *attachment=NULL)
                : Bufferless<Filter>(attachment)
        {
                IsolatedInitialize(MakeParameters("GroupSize", groupSize)
                        ("Separator", ConstByteArrayParameter(separator))
                        ("Terminator", ConstByteArrayParameter(terminator)));
        }

        void IsolatedInitialize(const NameValuePairs &parameters);
        unsigned int Put2(const byte *begin, unsigned int length, int messageEnd, bool blocking);

private:
        SecByteBlock m_separator, m_terminator;
        unsigned int m_groupSize, m_counter;
};

NAMESPACE_END

#endif

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