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executable file
·204 lines (173 loc) · 5.02 KB
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//
// Base32Encoder.cpp
//
// $Id: //poco/1.4/Foundation/src/Base32Encoder.cpp#2 $
//
// Library: Foundation
// Package: Streams
// Module: Base32
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/Base32Encoder.h"
namespace Poco {
const unsigned char Base32EncoderBuf::OUT_ENCODING[32] =
{
'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', '2', '3', '4', '5', '6', '7',
};
Base32EncoderBuf::Base32EncoderBuf(std::ostream& ostr, bool padding):
_groupLength(0),
_buf(*ostr.rdbuf()),
_doPadding(padding)
{
}
Base32EncoderBuf::~Base32EncoderBuf()
{
try
{
close();
}
catch (...)
{
}
}
int Base32EncoderBuf::writeToDevice(char c)
{
static const int eof = std::char_traits<char>::eof();
_group[_groupLength++] = (unsigned char) c;
if (_groupLength == 5)
{
unsigned char idx;
idx = _group[0] >> 3;
if (_buf.sputc(OUT_ENCODING[idx]) == eof) return eof;
idx = ((_group[0] & 0x07) << 2) | (_group[1] >> 6);
if (_buf.sputc(OUT_ENCODING[idx]) == eof) return eof;
idx = ((_group[1] & 0x3E) >> 1);
if (_buf.sputc(OUT_ENCODING[idx]) == eof) return eof;
idx = ((_group[1] & 0x01) << 4) | (_group[2] >> 4);
if (_buf.sputc(OUT_ENCODING[idx]) == eof) return eof;
idx = ((_group[2] & 0x0F) << 1) | (_group[3] >> 7);
if (_buf.sputc(OUT_ENCODING[idx]) == eof) return eof;
idx = ((_group[3] & 0x7C) >> 2);
if (_buf.sputc(OUT_ENCODING[idx]) == eof) return eof;
idx = ((_group[3] & 0x03) << 3) | (_group[4] >> 5);
if (_buf.sputc(OUT_ENCODING[idx]) == eof) return eof;
idx = (_group[4] & 0x1F);
if (_buf.sputc(OUT_ENCODING[idx]) == eof) return eof;
_groupLength = 0;
}
return charToInt(c);
}
int Base32EncoderBuf::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] >> 3;
if (_buf.sputc(OUT_ENCODING[idx]) == eof) return eof;
idx = ((_group[0] & 0x07) << 2);
if (_buf.sputc(OUT_ENCODING[idx]) == eof) return eof;
if (_doPadding) {
if (_buf.sputc('=') == eof) return eof;
if (_buf.sputc('=') == eof) return eof;
if (_buf.sputc('=') == eof) return eof;
if (_buf.sputc('=') == eof) return eof;
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] >> 3;
if (_buf.sputc(OUT_ENCODING[idx]) == eof) return eof;
idx = ((_group[0] & 0x07) << 2) | (_group[1] >> 6);
if (_buf.sputc(OUT_ENCODING[idx]) == eof) return eof;
idx = ((_group[1] & 0x3E) >> 1);
if (_buf.sputc(OUT_ENCODING[idx]) == eof) return eof;
idx = ((_group[1] & 0x01) << 4);
if (_buf.sputc(OUT_ENCODING[idx]) == eof) return eof;
if (_doPadding) {
if (_buf.sputc('=') == eof) return eof;
if (_buf.sputc('=') == eof) return eof;
if (_buf.sputc('=') == eof) return eof;
if (_buf.sputc('=') == eof) return eof;
}
}
else if (_groupLength == 3)
{
_group[3] = 0;
unsigned char idx;
idx = _group[0] >> 3;
if (_buf.sputc(OUT_ENCODING[idx]) == eof) return eof;
idx = ((_group[0] & 0x07) << 2) | (_group[1] >> 6);
if (_buf.sputc(OUT_ENCODING[idx]) == eof) return eof;
idx = ((_group[1] & 0x3E) >> 1);
if (_buf.sputc(OUT_ENCODING[idx]) == eof) return eof;
idx = ((_group[1] & 0x01) << 4) | (_group[2] >> 4);
if (_buf.sputc(OUT_ENCODING[idx]) == eof) return eof;
idx = ((_group[2] & 0x0F) << 1);
if (_buf.sputc(OUT_ENCODING[idx]) == eof) return eof;
if (_doPadding) {
if (_buf.sputc('=') == eof) return eof;
if (_buf.sputc('=') == eof) return eof;
if (_buf.sputc('=') == eof) return eof;
}
}
else if (_groupLength == 4)
{
_group[4] = 0;
unsigned char idx;
idx = _group[0] >> 3;
if (_buf.sputc(OUT_ENCODING[idx]) == eof) return eof;
idx = ((_group[0] & 0x07) << 2) | (_group[1] >> 6);
if (_buf.sputc(OUT_ENCODING[idx]) == eof) return eof;
idx = ((_group[1] & 0x3E) >> 1);
if (_buf.sputc(OUT_ENCODING[idx]) == eof) return eof;
idx = ((_group[1] & 0x01) << 4) | (_group[2] >> 4);
if (_buf.sputc(OUT_ENCODING[idx]) == eof) return eof;
idx = ((_group[2] & 0x0F) << 1) | (_group[3] >> 7);
if (_buf.sputc(OUT_ENCODING[idx]) == eof) return eof;
idx = ((_group[3] & 0x7C) >> 2);
if (_buf.sputc(OUT_ENCODING[idx]) == eof) return eof;
idx = ((_group[3] & 0x03) << 3);
if (_buf.sputc(OUT_ENCODING[idx]) == eof) return eof;
if (_doPadding && _buf.sputc('=') == eof) return eof;
}
_groupLength = 0;
return _buf.pubsync();
}
Base32EncoderIOS::Base32EncoderIOS(std::ostream& ostr, bool padding):
_buf(ostr, padding)
{
poco_ios_init(&_buf);
}
Base32EncoderIOS::~Base32EncoderIOS()
{
}
int Base32EncoderIOS::close()
{
return _buf.close();
}
Base32EncoderBuf* Base32EncoderIOS::rdbuf()
{
return &_buf;
}
Base32Encoder::Base32Encoder(std::ostream& ostr, bool padding):
Base32EncoderIOS(ostr, padding), std::ostream(&_buf)
{
}
Base32Encoder::~Base32Encoder()
{
}
} // namespace Poco