// :mode=c++:

/*

encode.h - c++ wrapper for a base64 encoding algorithm

This is part of the libb64 project, and has been placed in the public domain.

For details, see http://sourceforge.net/projects/libb64

*/

#ifndef BASE64_ENCODE_H

#define BASE64_ENCODE_H

#include <iostream>

namespace base64

{

	extern "C"

	{

		#include "cencode.h"

	}

	struct encoder

	{

		base64_encodestate _state;

		int _buffersize;

		encoder(int buffersize_in = BUFFERSIZE)

		: _buffersize(buffersize_in)

		{

			base64_init_encodestate(&_state);

		}

		int encode(char value_in)

		{

			return base64_encode_value(value_in);

		}

		int encode(const char* code_in, const int length_in, char* plaintext_out)

		{

			return base64_encode_block(code_in, length_in, plaintext_out, &_state);

		}

		int encode_end(char* plaintext_out)

		{

			return base64_encode_blockend(plaintext_out, &_state);

		}

		void encode(std::istream& istream_in, std::ostream& ostream_in)

		{

			base64_init_encodestate(&_state);

			//

			const int N = _buffersize;

			char* plaintext = new char[N];

			char* code = new char[2*N];

			int plainlength;

			int codelength;

			do

			{

				istream_in.read(plaintext, N);

				plainlength = static_cast<int>(istream_in.gcount());

				//

				codelength = encode(plaintext, plainlength, code);

				ostream_in.write(code, codelength);

			}

			while (istream_in.good() && plainlength > 0);

			codelength = encode_end(code);

			ostream_in.write(code, codelength);

			//

			base64_init_encodestate(&_state);

			delete [] code;

			delete [] plaintext;

		}

	};

} // namespace base64

#endif // BASE64_ENCODE_H