/usr/include/odil/base64.txx is in libodil-dev 0.8.0-4build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* odil - Copyright (C) Universite de Strasbourg
* Distributed under the terms of the CeCILL-B license, as published by
* the CEA-CNRS-INRIA. Refer to the LICENSE file or to
* http://www.cecill.info/licences/Licence_CeCILL-B_V1-en.html
* for details.
************************************************************************/
#include "odil/base64.h"
#include <iostream>
#include <string>
#ifndef _90eec83b_0ab6_4669_8454_e5a7e0a11a26
#define _90eec83b_0ab6_4669_8454_e5a7e0a11a26
namespace odil
{
namespace base64
{
template<typename TInputIterator, typename TOutputIterator>
void encode(
TInputIterator begin, TInputIterator end, TOutputIterator destination)
{
auto iterator = begin;
unsigned char carry=0;
unsigned int position=0;
while(iterator != end)
{
unsigned char const input = static_cast<unsigned char>(*iterator);
unsigned char symbol_index;
if(position%3 == 0)
{
symbol_index = input >> 2;
carry = input & 3;
*destination = symbols[symbol_index];
}
else if(position%3 == 1)
{
symbol_index = (carry << 4) + (input >> 4);
carry = input & 15;
*destination = symbols[symbol_index];
}
else // position%3 == 2
{
symbol_index = (carry << 2) + (input >> 6);
carry = input & 63;
*destination = symbols[symbol_index];
++destination;
*destination = symbols[carry];
}
++iterator;
++destination;
++position;
}
if(position%3 == 1)
{
*destination = symbols[carry<<4];
++destination;
*destination = '=';
++destination;
*destination = '=';
}
else if(position%3 == 2)
{
*destination = symbols[carry<<2];
++destination;
*destination = '=';
}
// Otherwise (position%3 == 0), nothing to do.
}
template<typename TInputIterator, typename TOutputIterator>
void decode(
TInputIterator begin, TInputIterator end, TOutputIterator destination)
{
auto iterator = begin;
unsigned char current=0;
unsigned int position=0;
while(iterator != end)
{
unsigned char input = static_cast<unsigned char>(*iterator);
if(input != '=')
{
input = reversed_symbols[input];
if(position%4 == 0)
{
current = input;
}
else if(position%4 == 1)
{
current = (current << 2) + (input >> 4);
*destination = current;
++destination;
current = input & 15;
}
else if(position%4 == 2)
{
current = (current << 4) + (input >> 2);
*destination = current;
++destination;
current = input & 3;
}
else // position%4 == 3
{
current = (current << 6) + input;
*destination = current;
++destination;
}
}
++iterator;
++position;
}
}
}
}
#endif // _90eec83b_0ab6_4669_8454_e5a7e0a11a26
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