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// **************************************************************************
// * This file is part of the FreeFileSync project. It is distributed under *
// * GNU General Public License: http://www.gnu.org/licenses/gpl.html *
// * Copyright (C) 2008-2011 ZenJu (zhnmju123 AT gmx.de) *
// **************************************************************************
//
#ifndef SERIALIZE_H_INCLUDED
#define SERIALIZE_H_INCLUDED
#include <vector>
#include "file_error.h"
#include <wx/stream.h>
#include <memory>
#include <boost/cstdint.hpp>
#include "file_io.h"
namespace zen
{
//unchecked, unformatted serialization
template <class T> T readPOD (wxInputStream& stream);
template <class T> void writePOD(wxOutputStream& stream, const T& pod);
template <class S> S readString (wxInputStream& stream);
template <class S> void writeString(wxOutputStream& stream, const S& str);
//############# wxWidgets stream adapter #############
// can be used as base classes (have virtual destructors)
class FileInputStream : public wxInputStream
{
public:
FileInputStream(const Zstring& filename) : //throw (FileError)
fileObj(filename) {}
private:
virtual size_t OnSysRead(void* buffer, size_t bufsize)
{
return fileObj.read(buffer, bufsize); //throw (FileError)
}
zen::FileInput fileObj;
};
class FileOutputStream : public wxOutputStream
{
public:
FileOutputStream(const Zstring& filename) : //throw (FileError)
fileObj(filename, zen::FileOutput::ACC_OVERWRITE) {}
private:
virtual size_t OnSysWrite(const void* buffer, size_t bufsize)
{
fileObj.write(buffer, bufsize); //throw (FileError)
return bufsize;
}
zen::FileOutput fileObj;
};
class ReadInputStream //throw (FileError)
{
protected:
ReadInputStream(wxInputStream& stream, const wxString& errorObjName) : stream_(stream), errorObjName_(errorObjName) {}
template <class T>
T readNumberC() const; //throw (FileError), checked read operation
template <class S>
S readStringC() const; //throw (FileError), checked read operation
typedef std::shared_ptr<std::vector<char> > CharArray; //there's no guarantee std::string has a ref-counted implementation... so use this "thing"
CharArray readArrayC() const; //throw (FileError)
void check() const;
wxInputStream& getStream()
{
return stream_;
}
private:
wxInputStream& stream_;
void throwReadError() const; //throw (FileError)
const wxString& errorObjName_; //used for error text only
};
class WriteOutputStream //throw (FileError)
{
protected:
WriteOutputStream(const wxString& errorObjName, wxOutputStream& stream) : stream_(stream), errorObjName_(errorObjName) {}
template <class T>
void writeNumberC(T number) const; //throw (FileError), checked write operation
template <class S>
void writeStringC(const S& str) const; //throw (FileError), checked write operation
void writeArrayC(const std::vector<char>& buffer) const; //throw (FileError)
void check() const;
wxOutputStream& getStream()
{
return stream_;
}
private:
wxOutputStream& stream_;
void throwWriteError() const; //throw (FileError)
const wxString& errorObjName_; //used for error text only!
};
//---------------Inline Implementation---------------------------------------------------
template <class T>
inline
T readPOD(wxInputStream& stream)
{
T pod = 0;
stream.Read(reinterpret_cast<char*>(&pod), sizeof(T));
return pod;
}
template <class T>
inline
void writePOD(wxOutputStream& stream, const T& pod)
{
stream.Write(reinterpret_cast<const char*>(&pod), sizeof(T));
}
template <class S>
inline
S readString(wxInputStream& stream)
{
typedef typename S::value_type CharType;
const boost::uint32_t strLength = readPOD<boost::uint32_t>(stream);
if (strLength <= 1000)
{
CharType buffer[1000];
stream.Read(buffer, sizeof(CharType) * strLength);
return S(buffer, strLength);
}
else
{
std::vector<CharType> buffer(strLength); //throw (std::bad_alloc)
stream.Read(&buffer[0], sizeof(CharType) * strLength);
return S(&buffer[0], strLength);
}
}
template <class S>
inline
void writeString(wxOutputStream& stream, const S& str)
{
writePOD(stream, static_cast<boost::uint32_t>(str.length()));
stream.Write(str.c_str(), sizeof(typename S::value_type) * str.length());
}
inline
void ReadInputStream::check() const
{
if (stream_.GetLastError() != wxSTREAM_NO_ERROR)
throwReadError();
}
template <class T>
inline
T ReadInputStream::readNumberC() const //checked read operation
{
T output = readPOD<T>(stream_);
check();
return output;
}
template <class S>
inline
S ReadInputStream::readStringC() const //checked read operation
{
S output;
try
{
output = readString<S>(stream_); //throw (std::bad_alloc)
check();
}
catch (std::exception&)
{
throwReadError();
}
return output;
}
template <class T>
inline
void WriteOutputStream::writeNumberC(T number) const //checked write operation
{
writePOD<T>(stream_, number);
check();
}
template <class S>
inline
void WriteOutputStream::writeStringC(const S& str) const //checked write operation
{
writeString(stream_, str);
check();
}
inline
void WriteOutputStream::check() const
{
if (stream_.GetLastError() != wxSTREAM_NO_ERROR)
throwWriteError();
}
}
#endif //SERIALIZE_H_INCLUDED
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