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//
// Base64Encoder.cpp
//
// Library: Foundation
// Package: Streams
// Module: Base64
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/Base64Encoder.h"
namespace Poco {
const unsigned char Base64EncoderBuf::OUT_ENCODING[64] =
{
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
'w', 'x', 'y', 'z', '0', '1', '2', '3',
'4', '5', '6', '7', '8', '9', '+', '/'
};
const unsigned char Base64EncoderBuf::OUT_ENCODING_URL[64] =
{
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
'w', 'x', 'y', 'z', '0', '1', '2', '3',
'4', '5', '6', '7', '8', '9', '-', '_'
};
Base64EncoderBuf::Base64EncoderBuf(std::ostream& ostr, int options):
_options(options),
_groupLength(0),
_pos(0),
_lineLength((options & BASE64_URL_ENCODING) ? 0 : 72),
_buf(*ostr.rdbuf()),
_pOutEncoding((options & BASE64_URL_ENCODING) ? OUT_ENCODING_URL : OUT_ENCODING)
{
}
Base64EncoderBuf::~Base64EncoderBuf()
{
try
{
close();
}
catch (...)
{
}
}
void Base64EncoderBuf::setLineLength(int lineLength)
{
_lineLength = lineLength;
}
int Base64EncoderBuf::getLineLength() const
{
return _lineLength;
}
int Base64EncoderBuf::writeToDevice(char c)
{
static const int eof = std::char_traits<char>::eof();
_group[_groupLength++] = (unsigned char) c;
if (_groupLength == 3)
{
unsigned char idx;
idx = _group[0] >> 2;
if (_buf.sputc(_pOutEncoding[idx]) == eof) return eof;
idx = ((_group[0] & 0x03) << 4) | (_group[1] >> 4);
if (_buf.sputc(_pOutEncoding[idx]) == eof) return eof;
idx = ((_group[1] & 0x0F) << 2) | (_group[2] >> 6);
if (_buf.sputc(_pOutEncoding[idx]) == eof) return eof;
idx = _group[2] & 0x3F;
if (_buf.sputc(_pOutEncoding[idx]) == eof) return eof;
_pos += 4;
if (_lineLength > 0 && _pos >= _lineLength)
{
if (_buf.sputc('\r') == eof) return eof;
if (_buf.sputc('\n') == eof) return eof;
_pos = 0;
}
_groupLength = 0;
}
return charToInt(c);
}
int Base64EncoderBuf::close()
{
static const int eof = std::char_traits<char>::eof();
if (sync() == eof) return eof;
if (_groupLength == 1)
{
_group[1] = 0;
unsigned char idx;
idx = _group[0] >> 2;
if (_buf.sputc(_pOutEncoding[idx]) == eof) return eof;
idx = ((_group[0] & 0x03) << 4) | (_group[1] >> 4);
if (_buf.sputc(_pOutEncoding[idx]) == eof) return eof;
if (!(_options & BASE64_NO_PADDING))
{
if (_buf.sputc('=') == eof) return eof;
if (_buf.sputc('=') == eof) return eof;
}
}
else if (_groupLength == 2)
{
_group[2] = 0;
unsigned char idx;
idx = _group[0] >> 2;
if (_buf.sputc(_pOutEncoding[idx]) == eof) return eof;
idx = ((_group[0] & 0x03) << 4) | (_group[1] >> 4);
if (_buf.sputc(_pOutEncoding[idx]) == eof) return eof;
idx = ((_group[1] & 0x0F) << 2) | (_group[2] >> 6);
if (_buf.sputc(_pOutEncoding[idx]) == eof) return eof;
if (!(_options & BASE64_NO_PADDING))
{
if (_buf.sputc('=') == eof) return eof;
}
}
_groupLength = 0;
return _buf.pubsync();
}
Base64EncoderIOS::Base64EncoderIOS(std::ostream& ostr, int options): _buf(ostr, options)
{
poco_ios_init(&_buf);
}
Base64EncoderIOS::~Base64EncoderIOS()
{
}
int Base64EncoderIOS::close()
{
return _buf.close();
}
Base64EncoderBuf* Base64EncoderIOS::rdbuf()
{
return &_buf;
}
Base64Encoder::Base64Encoder(std::ostream& ostr, int options): Base64EncoderIOS(ostr, options), std::ostream(&_buf)
{
}
Base64Encoder::~Base64Encoder()
{
}
} // namespace Poco
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