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//
// StreamConverter.cpp
//
// Library: Foundation
// Package: Text
// Module: StreamConverter
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/StreamConverter.h"
#include "Poco/TextEncoding.h"
namespace Poco {
StreamConverterBuf::StreamConverterBuf(std::istream& istr, const TextEncoding& inEncoding, const TextEncoding& outEncoding, int defaultChar):
_pIstr(&istr),
_pOstr(0),
_inEncoding(inEncoding),
_outEncoding(outEncoding),
_defaultChar(defaultChar),
_sequenceLength(0),
_pos(0),
_errors(0)
{
}
StreamConverterBuf::StreamConverterBuf(std::ostream& ostr, const TextEncoding& inEncoding, const TextEncoding& outEncoding, int defaultChar):
_pIstr(0),
_pOstr(&ostr),
_inEncoding(inEncoding),
_outEncoding(outEncoding),
_defaultChar(defaultChar),
_sequenceLength(0),
_pos(0),
_errors(0)
{
}
StreamConverterBuf::~StreamConverterBuf()
{
}
int StreamConverterBuf::readFromDevice()
{
poco_assert_dbg (_pIstr);
if (_pos < _sequenceLength) return _buffer[_pos++];
_pos = 0;
_sequenceLength = 0;
int c = _pIstr->get();
if (c == -1) return -1;
poco_assert (c < 256);
int uc;
_buffer [0] = (unsigned char) c;
int n = _inEncoding.queryConvert(_buffer, 1);
int read = 1;
while (-1 > n)
{
poco_assert_dbg(-n <= sizeof(_buffer));
_pIstr->read((char*) _buffer + read, -n - read);
read = -n;
n = _inEncoding.queryConvert(_buffer, -n);
}
if (-1 >= n)
{
uc = _defaultChar;
++_errors;
}
else
{
uc = n;
}
_sequenceLength = _outEncoding.convert(uc, _buffer, sizeof(_buffer));
if (_sequenceLength == 0)
_sequenceLength = _outEncoding.convert(_defaultChar, _buffer, sizeof(_buffer));
if (_sequenceLength == 0)
return -1;
else
return _buffer[_pos++];
}
int StreamConverterBuf::writeToDevice(char c)
{
poco_assert_dbg (_pOstr);
_buffer[_pos++] = (unsigned char) c;
if (_sequenceLength == 0 || _sequenceLength == _pos)
{
int n = _inEncoding.queryConvert(_buffer, _pos);
if (-1 <= n)
{
int uc = n;
if (-1 == n)
{
++_errors;
return -1;
}
int number = _outEncoding.convert(uc, _buffer, sizeof(_buffer));
if (number == 0) number = _outEncoding.convert(_defaultChar, _buffer, sizeof(_buffer));
poco_assert_dbg (number <= sizeof(_buffer));
_pOstr->write((char*) _buffer, number);
_sequenceLength = 0;
_pos = 0;
}
else
{
_sequenceLength = -n;
}
}
return charToInt(c);
}
int StreamConverterBuf::errors() const
{
return _errors;
}
StreamConverterIOS::StreamConverterIOS(std::istream& istr, const TextEncoding& inEncoding, const TextEncoding& outEncoding, int defaultChar):
_buf(istr, inEncoding, outEncoding, defaultChar)
{
poco_ios_init(&_buf);
}
StreamConverterIOS::StreamConverterIOS(std::ostream& ostr, const TextEncoding& inEncoding, const TextEncoding& outEncoding, int defaultChar):
_buf(ostr, inEncoding, outEncoding, defaultChar)
{
poco_ios_init(&_buf);
}
StreamConverterIOS::~StreamConverterIOS()
{
}
StreamConverterBuf* StreamConverterIOS::rdbuf()
{
return &_buf;
}
int StreamConverterIOS::errors() const
{
return _buf.errors();
}
InputStreamConverter::InputStreamConverter(std::istream& istr, const TextEncoding& inEncoding, const TextEncoding& outEncoding, int defaultChar):
StreamConverterIOS(istr, inEncoding, outEncoding, defaultChar),
std::istream(&_buf)
{
}
InputStreamConverter::~InputStreamConverter()
{
}
OutputStreamConverter::OutputStreamConverter(std::ostream& ostr, const TextEncoding& inEncoding, const TextEncoding& outEncoding, int defaultChar):
StreamConverterIOS(ostr, inEncoding, outEncoding, defaultChar),
std::ostream(&_buf)
{
}
OutputStreamConverter::~OutputStreamConverter()
{
}
} // namespace Poco
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