base64.hpp

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//
// base64.hpp - c++ wrapper for base64 functions
//

#ifndef _BASE64_HPP_INCLUDED
#define _BASE64_HPP_INCLUDED

#include <iostream>
#include "types/base64.h"

namespace _Wolframe     {
namespace base64        {

inline size_t encodedSize( size_t dataSize, unsigned short lineLength )
{
        return base64_encodedSize( dataSize, lineLength );
}

inline int encode( const void* data, size_t dataSize,
                   char* encoded, size_t encodedMaxSize, unsigned short lineLength = 72 )
{
        return base64_encode( data, dataSize, encoded, encodedMaxSize, lineLength );
}

std::string encode( const void* data, size_t dataSize, unsigned short lineLength );

class Encoder
{
        static const size_t BUFFERSIZE = 512;
public:
        Encoder( size_t bufferSize = BUFFERSIZE,
                 unsigned short lineLength = DEFAULT_BASE64_LINE_LENGTH )
                : m_bufferSize( bufferSize )
        {
                base64_initEncodeState( &m_state, lineLength );
        }

        size_t encodedSize( size_t dataSize )
        {
                return base64_encodedSize( dataSize, m_state.lineLength );
        }

        int encodeChunk( const void* data, size_t dataSize,
                         char* encoded, size_t encodedMaxSize )
        {
                return base64_encodeChunk( &m_state, data, dataSize, encoded, encodedMaxSize );
        }

        int encodeEndChunk( char* encoded, size_t encodedMaxSize )
        {
                return base64_encodeEndChunk( &m_state, encoded, encodedMaxSize );
        }

        void encode( std::istream& input, std::ostream& output );

private:
        base64_EncodeState      m_state;
        const size_t            m_bufferSize;

#ifdef _WIN32
// prevents C4512 on Windows (the m_bufferSize is const in the class)
private:
        Encoder& operator=( const Encoder &o );
#endif
};


inline int decode( const char* encoded, size_t encodedSize, void* data, size_t dataMaxSize )
{
        return base64_decode( encoded, encodedSize, data, dataMaxSize );
}

inline int decode( const std::string encoded, void* data, size_t dataMaxSize )
{
        return base64_decode( encoded.data(), encoded.length(), data, dataMaxSize );
}


class Decoder
{
        static const size_t BUFFERSIZE = 512;
public:
        Decoder() : m_bufferSize( BUFFERSIZE )
        {
                base64_initDecodeState( &m_state );
        }

        Decoder( size_t bufferSize ) : m_bufferSize( bufferSize )
        {
                base64_initDecodeState( &m_state );
        }

        int decode( const char* encoded, size_t encodedSize,
                    void* data, size_t dataMaxSize )
        {
                return base64_decodeChunk( &m_state, encoded, encodedSize, data, dataMaxSize );
        }

        void decode( std::istream& input, std::ostream& output );

private:
        base64_DecodeState      m_state;
        const size_t            m_bufferSize;

#ifdef _WIN32
// prevents C4512 on Windows (the m_bufferSize is const in the class)
private:
        Decoder& operator=( const Decoder &o );
#endif
};

}} // namespace _Wolframe::base64

#endif // _BASE64_HPP_INCLUDED