// hex.h - originally written and placed in the public domain by Wei Dai

/// \file hex.h

/// \brief Classes for HexEncoder and HexDecoder

#ifndef CRYPTOPP_HEX_H

#define CRYPTOPP_HEX_H

#include "cryptlib.h"

#include "basecode.h"

NAMESPACE_BEGIN(CryptoPP)

/// \brief Converts given data to base 16

class CRYPTOPP_DLL HexEncoder : public SimpleProxyFilter

{

public:

  /// \brief Construct a HexEncoder

  /// \param attachment a BufferedTrasformation to attach to this object

  /// \param uppercase a flag indicating uppercase output

  /// \param groupSize the size of the output grouping

  /// \param separator the separator to use between groups

  /// \param terminator the terminator append after processing

  HexEncoder(BufferedTransformation *attachment = NULLPTR, bool uppercase = true, int groupSize = 0, const std::string &separator = ":", const std::string &terminator = "")

    : SimpleProxyFilter(new BaseN_Encoder(new Grouper), attachment)

  {

    IsolatedInitialize(MakeParameters(Name::Uppercase(), uppercase)(Name::GroupSize(), groupSize)(Name::Separator(), ConstByteArrayParameter(separator))(Name::Terminator(), ConstByteArrayParameter(terminator)));

  }

  void IsolatedInitialize(const NameValuePairs &parameters);

};

/// \brief Decode base 16 data back to bytes

class CRYPTOPP_DLL HexDecoder : public BaseN_Decoder

{

public:

  /// \brief Construct a HexDecoder

  /// \param attachment a BufferedTrasformation to attach to this object

  HexDecoder(BufferedTransformation *attachment = NULLPTR)

    : BaseN_Decoder(GetDefaultDecodingLookupArray(), 4, attachment) {}

  void IsolatedInitialize(const NameValuePairs &parameters);

private:

  static const int * CRYPTOPP_API GetDefaultDecodingLookupArray();

};

NAMESPACE_END

#endif