mirror of
https://github.com/pocoproject/poco.git
synced 2024-12-13 18:45:10 +01:00
151 lines
5.4 KiB
C++
151 lines
5.4 KiB
C++
//
|
|
// StreamConverter.h
|
|
//
|
|
// $Id: //poco/1.4/Foundation/include/Poco/StreamConverter.h#1 $
|
|
//
|
|
// Library: Foundation
|
|
// Package: Text
|
|
// Module: StreamConverter
|
|
//
|
|
// Definition of the StreamConverter class.
|
|
//
|
|
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
|
|
// and Contributors.
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person or organization
|
|
// obtaining a copy of the software and accompanying documentation covered by
|
|
// this license (the "Software") to use, reproduce, display, distribute,
|
|
// execute, and transmit the Software, and to prepare derivative works of the
|
|
// Software, and to permit third-parties to whom the Software is furnished to
|
|
// do so, all subject to the following:
|
|
//
|
|
// The copyright notices in the Software and this entire statement, including
|
|
// the above license grant, this restriction and the following disclaimer,
|
|
// must be included in all copies of the Software, in whole or in part, and
|
|
// all derivative works of the Software, unless such copies or derivative
|
|
// works are solely in the form of machine-executable object code generated by
|
|
// a source language processor.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
|
|
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
|
|
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
|
|
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
|
// DEALINGS IN THE SOFTWARE.
|
|
//
|
|
|
|
|
|
#ifndef Foundation_StreamConverter_INCLUDED
|
|
#define Foundation_StreamConverter_INCLUDED
|
|
|
|
|
|
#include "Poco/Foundation.h"
|
|
#include "Poco/TextEncoding.h"
|
|
#include "Poco/UnbufferedStreamBuf.h"
|
|
#include <istream>
|
|
#include <ostream>
|
|
|
|
|
|
namespace Poco {
|
|
|
|
|
|
class Foundation_API StreamConverterBuf: public UnbufferedStreamBuf
|
|
/// A StreamConverter converts streams from one encoding (inEncoding)
|
|
/// into another (outEncoding).
|
|
/// If a character cannot be represented in outEncoding, defaultChar
|
|
/// is used instead.
|
|
/// If a byte sequence is not valid in inEncoding, defaultChar is used
|
|
/// instead and the encoding error count is incremented.
|
|
{
|
|
public:
|
|
StreamConverterBuf(std::istream& istr, const TextEncoding& inEncoding, const TextEncoding& outEncoding, int defaultChar = '?');
|
|
/// Creates the StreamConverterBuf and connects it
|
|
/// to the given input stream.
|
|
|
|
StreamConverterBuf(std::ostream& ostr, const TextEncoding& inEncoding, const TextEncoding& outEncoding, int defaultChar = '?');
|
|
/// Creates the StreamConverterBuf and connects it
|
|
/// to the given output stream.
|
|
|
|
~StreamConverterBuf();
|
|
/// Destroys the StreamConverterBuf.
|
|
|
|
int errors() const;
|
|
/// Returns the number of encoding errors encountered.
|
|
|
|
protected:
|
|
int readFromDevice();
|
|
int writeToDevice(char c);
|
|
|
|
private:
|
|
std::istream* _pIstr;
|
|
std::ostream* _pOstr;
|
|
const TextEncoding& _inEncoding;
|
|
const TextEncoding& _outEncoding;
|
|
int _defaultChar;
|
|
unsigned char _buffer[TextEncoding::MAX_SEQUENCE_LENGTH];
|
|
int _sequenceLength;
|
|
int _pos;
|
|
int _errors;
|
|
};
|
|
|
|
|
|
class Foundation_API StreamConverterIOS: public virtual std::ios
|
|
/// The base class for InputStreamConverter and OutputStreamConverter.
|
|
///
|
|
/// This class is needed to ensure the correct initialization
|
|
/// order of the stream buffer and base classes.
|
|
{
|
|
public:
|
|
StreamConverterIOS(std::istream& istr, const TextEncoding& inEncoding, const TextEncoding& outEncoding, int defaultChar = '?');
|
|
StreamConverterIOS(std::ostream& ostr, const TextEncoding& inEncoding, const TextEncoding& outEncoding, int defaultChar = '?');
|
|
~StreamConverterIOS();
|
|
StreamConverterBuf* rdbuf();
|
|
int errors() const;
|
|
|
|
protected:
|
|
StreamConverterBuf _buf;
|
|
};
|
|
|
|
|
|
class Foundation_API InputStreamConverter: public StreamConverterIOS, public std::istream
|
|
/// This stream converts all characters read from the
|
|
/// underlying istream from one character encoding into another.
|
|
/// If a character cannot be represented in outEncoding, defaultChar
|
|
/// is used instead.
|
|
/// If a byte sequence read from the underlying stream is not valid in inEncoding,
|
|
/// defaultChar is used instead and the encoding error count is incremented.
|
|
{
|
|
public:
|
|
InputStreamConverter(std::istream& istr, const TextEncoding& inEncoding, const TextEncoding& outEncoding, int defaultChar = '?');
|
|
/// Creates the InputStreamConverter and connects it
|
|
/// to the given input stream.
|
|
|
|
~InputStreamConverter();
|
|
/// Destroys the stream.
|
|
};
|
|
|
|
|
|
class Foundation_API OutputStreamConverter: public StreamConverterIOS, public std::ostream
|
|
/// This stream converts all characters written to the
|
|
/// underlying ostream from one character encoding into another.
|
|
/// If a character cannot be represented in outEncoding, defaultChar
|
|
/// is used instead.
|
|
/// If a byte sequence written to the stream is not valid in inEncoding,
|
|
/// defaultChar is used instead and the encoding error count is incremented.
|
|
{
|
|
public:
|
|
OutputStreamConverter(std::ostream& ostr, const TextEncoding& inEncoding, const TextEncoding& outEncoding, int defaultChar = '?');
|
|
/// Creates the OutputStreamConverter and connects it
|
|
/// to the given input stream.
|
|
|
|
~OutputStreamConverter();
|
|
/// Destroys the CountingOutputStream.
|
|
};
|
|
|
|
|
|
} // namespace Poco
|
|
|
|
|
|
#endif // Foundation_StreamConverter_INCLUDED
|