ibrcommon/ibrcommon/data/Base64Reader.h

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/*
 * Base64Reader.h
 *
 *  Created on: 21.06.2011
 *      Author: morgenro
 */

#ifndef BASE64READER_H_
#define BASE64READER_H_

#include <iostream>
#include <string.h>
#include <stdint.h>

namespace ibrcommon
{
        class Base64Reader : public std::basic_streambuf<char, std::char_traits<char> >, public std::istream
        {
        public:
                Base64Reader(std::istream &stream, const size_t limit = 0, const size_t buffer = 2048);
                virtual ~Base64Reader();

        protected:
                virtual int underflow();

        private:
                static const char decodeCharacterTable[];

                std::istream &_stream;

                // Output buffer
                char *data_buf_;

                // length of the data buffer
                size_t data_size_;

                uint8_t _base64_state;

                size_t _char_counter;

                char _base64_buf[4];
                char _base64_padding;

                size_t _byte_read;
                size_t _byte_limit;
        };
}

#endif /* BASE64READER_H_ */