STL Compatible Base64 Encoder

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Environment: Any C++ compiler with STL support

This is compatible with STL base64 encoder.

It can encode/decode data from/to i(o)streams, streambufs, memory buffers, etc. Encoder uses iterator concept. Iterator must overload the *, ==, !=, and prefics ++ operators.

See encoder using:

1) Declare encoder

#include <base64.hpp>

int _State = 0;

base64<char> encoder; // base64 output/input in chars

                      // (may be wchar_t, …) or base64<> encoder;

2) Encode data form cin stream to output file

#include <iostream>

#include <fstream>



//

   …

//

// encode from cin



istream& istr = cin;

istreambuf_iterator<char> _From(istr.rdbuf());

istreambuf_iterator<char> _To(0);



//_From, _Last, _To may be any iterator class or pointers

// encode to output file

ofstream ostr(“test_out.txt”);

ostreambuf_iterator<char> _Out(ostr);



// Encode data with CRLF ta the end of line.

// You can use base64<>::noline() or base64<>::crlfsp()

// or other classes.

encoder.put(_From, _To, _Out, _State, base64<>::crlf());

3) Decode data form file stream to console output stream

// decode from file …

ifstream istr(“test_out.txt”);

istreambuf_iterator<char> _From(istr.rdbuf());

istreambuf_iterator<char> _To(0);



// … to console

ostreambuf_iterator<char> _Out(cout);

encoder.get(_From, _To, _Out, _State);

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