C++ std::fstream类代码示例

bool Context::saveContextSettingsToFile( std::fstream &file ) const{
    
    if( !file.is_open() ){
        errorLog << "saveContextSettingsToFile(fstream &file) - The file is not open!" << std::endl;
        return false;
    }
    
    if( !MLBase::saveBaseSettingsToFile( file ) ) return false;
    
    file << "Initialized: " << initialized << std::endl;
    
    return true;
}

MemoryAccessor::MemoryAccessor( GsTLInt size, std::fstream& stream ) {

  values_ = new(std::nothrow) float[size];
  flags_ = new(std::nothrow) bool[size];
  if(values_ == NULL || flags_ == NULL) size_ = 0;
  else {
    size_ = size;

    if( !stream.is_open() ) {
      GsTLlog << "Error: Stream not open when trying to swap property to memory!!"
              << gstlIO::end;
    }
    stream.seekg(0);
    
    long int remaining = size*sizeof( float );
    stream.read( (char*) values_, remaining );
    
    // read the flags
    remaining = size*sizeof( bool );
    stream.read( (char*) flags_, remaining );
  }
}

bool unpatch(std::fstream &file, char* buffer, size_t size)
{
	std::vector<size_t> regemu;
	find_all(buffer, "REGEMU32", size, 8, regemu);

	if (!regemu.empty())
	{
		for (size_t pos : regemu)
		{
			file.seekg(pos, std::ios::beg);
			file.write("ADVAPI32", 8);
		}

		wprintf(L"REGEMU32 found (%d) and unpatched. ", regemu.size());
	}
	else
	{
		wprintf(L"REGEMU32 not found. ");
	}

	return !regemu.empty();
}

std::streampos search_forward ( std::fstream & _bs, const std::string & sample )
{
	size_t match ( 0 );
	cSaveIStreamPosition ip ( &_bs );
	streampos result ( static_cast<streampos>( -1 ) );
	cSaveStreamExceptions se ( &_bs, std::ios_base::goodbit );
	
	for( int ch( EOF ); match < sample.length(); match++ )
	{
		ch = _bs.get();
		if( ch == EOF )
			break;
		else if( ch != sample[match] )
			match = 0;
	}
	if( match == sample.length() )
		result = _bs.tellg() - static_cast<streampos>( match );
	
	_bs.clear();
	
	return result;
}

bool ClassLabelChangeFilter::save( std::fstream &file ) const {
    
    if( !file.is_open() ){
        errorLog << "save(fstream &file) - The file is not open!" << std::endl;
        return false;
    }
    
    file << "GRT_CLASS_LABEL_CHANGE_FILTER_FILE_V1.0" << std::endl;
    file << "NumInputDimensions: " << numInputDimensions << std::endl;
    file << "NumOutputDimensions: " << numOutputDimensions << std::endl;
    
    return true;
}

void write_var(std::fstream &stream, T variable)
{
    static_assert(std::is_signed<T>::value == false, "Value must be unsigned");

    constexpr const BYTE ZERO_BITTED = std::numeric_limits<BYTE>::max() / 2;
    constexpr const BYTE ONE_BITTED = ZERO_BITTED + 1;

    loop:
    {
        if ((variable & ~ZERO_BITTED) == 0)
        {
            stream.put(static_cast<BYTE>(variable));
            return;
        }
        else
        {
            stream.put(static_cast<BYTE>((variable & ZERO_BITTED) | ONE_BITTED));
            variable >>= 7;
        }
    }
    goto loop;
}

 inline void ReadElectricField(std::fstream& field_file) {
   std::string line;
   assert(field_file.is_open());
   getline(field_file, line);
   const std::vector<std::string> split_line = Split(line, ' ');
   std::vector<std::string>::const_iterator i_split = split_line.begin();
   for (int i_atom = 0; i_atom < group_size_; i_atom++) {
     for (int i_dim = 0; i_dim < DIMS; i_dim++) {
       electric_fields_(i_atom,i_dim) = atof((*i_split).c_str());
       i_split++;
     }
   }
 }

bool RBMQuantizer::load( std::fstream &file ){
    
    //Clear any previous model
    clear();
    
    if( !file.is_open() ){
        errorLog << "load(fstream &file) - The file is not open!" << std::endl;
        return false;
    }
    
    std::string word;
    
    //First, you should read and validate the header
    file >> word;
    if( word != "RBM_QUANTIZER_FILE_V1.0" ){
        errorLog << "load(fstream &file) - Invalid file format!" << std::endl;
        return false;
    }
    
    //Second, you should load the base feature extraction settings to the file
    if( !loadFeatureExtractionSettingsFromFile( file ) ){
        errorLog << "loadFeatureExtractionSettingsFromFile(fstream &file) - Failed to load base feature extraction settings from file!" << std::endl;
        return false;
    }
    
    file >> word;
    if( word != "QuantizerTrained:" ){
        errorLog << "load(fstream &file) - Failed to load QuantizerTrained!" << std::endl;
        return false;
    }
    file >> trained;
    
    file >> word;
    if( word != "NumClusters:" ){
        errorLog << "load(fstream &file) - Failed to load NumClusters!" << std::endl;
        return false;
    }
    file >> numClusters;
    
    if( trained ){
        if( !rbm.load( file ) ){
            errorLog << "load(fstream &file) - Failed to load SelfOrganizingMap settings from file!" << std::endl;
            return false;
        }
        initialized = true;
        featureDataReady = false;
        quantizationDistances.resize(numClusters,0);
    }
    
    return true;
}

void PEObject::WriteHeader(std::fstream &stream)
{
    unsigned zero = 0;
    for (int i =0; i < name.size() && i < 8; i++)
        stream.write(&name[i], 1);
    for (int i = name.size(); i < 8; i++)
        stream.write((char *)&zero, 1);
    unsigned msize = ObjectAlign(objectAlign, size);
    stream.write((char *)&msize, 4);
    stream.write((char *)&virtual_addr, 4);
    msize = ObjectAlign(fileAlign, initSize);
    stream.write((char *)&msize, 4);
    stream.write((char *)&raw_addr, 4);
    stream.write((char *)&zero, 4);
    stream.write((char *)&zero, 4);
    stream.write((char *)&zero, 4);
    int flg = (flags ^ WINF_NEG_FLAGS) & WINF_IMAGE_FLAGS; /* get characteristice for section */
    stream.write((char *)&flg, 4);
}

void printFile(std::fstream &file, const char filename[]) {
    file.seekg(0, file.end);
    int fileSize = file.tellg();
    contact contacts[ROWS_TOTAL_COUNT];
    std::ifstream fileToRead;
    fileToRead.open(filename, std::ios::binary | std::ios::in);
    if (fileToRead.fail()) {
        std::cout << "Не удается открыть файл\n";
        exit(1);
    }
    fileToRead.seekg(0, fileToRead.beg);
    bool formatError = false;

    std::cout << std::endl << "***************** Prinitng file ****************" << std::endl << std::endl;
    for (int i = 0; i < fileSize / ROW_LENGTH; i++) {
        fileToRead.read(contacts[i].firstName, NAME_LENGTH);
        fileToRead.read(contacts[i].lastName, NAME_LENGTH);
        fileToRead.read(contacts[i].phone, PHONE_LENGTH);

        std::cout << std::setw(NAME_LENGTH) << contacts[i].firstName << " | ";
        std::cout << std::setw(NAME_LENGTH) << contacts[i].lastName << " | ";
        std::cout << contacts[i].phone << std::endl;

        if (contacts[i].phone[1] != '(' || contacts[i].phone[5] != ')' || contacts[i].phone[9] != '-') {
            formatError = true;
        }
    }
    std::cout << std::endl << "***************** end of file ******************" << std::endl << std::endl;
    std::cout << "Length of the file should be " << ROW_LENGTH * ROWS_TOTAL_COUNT << ", got " << fileSize << std::endl;

    if (!formatError) {
        std::cout << "Correct formatting" << std::endl;
    }
    else {
        std::cout << "Error: incorrect formatting" << std::endl;
    }
    fileToRead.close();
}

void LuaHistoryFile::SaveLuaTable(lua_State* luaState, int nIndex, size_t nBufferLen, std::fstream& fileStream)
{
	vector<string> vecStrings;
	if(lua_istable(luaState,nIndex))
	{
		int nStrCnt = lua_objlen(luaState,nIndex);
		const char* cszWrite = NULL;
		for(int ix = 1; ix <= nStrCnt; ++ix)
		{
			lua_rawgeti(luaState, nIndex , ix);
			if(lua_isstring(luaState, -1))
			{
				cszWrite = luaL_checkstring(luaState, -1);
				wstring wstrWrite;
				UTF8_to_Unicode(cszWrite, strlen(cszWrite), wstrWrite);
				string astrWrite;
				wstrWrite += WCHAR('\n');
				Unicode_to_ANSI(wstrWrite.c_str(), wstrWrite.size(),astrWrite);
				vecStrings.push_back(astrWrite);
				
			}
			lua_pop(luaState,1);
		}
	}
	char szStrCnt[100];
	itoa(vecStrings.size(), szStrCnt, 100);
	int nStrCntLen = strlen(szStrCnt);
	szStrCnt[nStrCntLen] = '\n';
	fileStream.write(szStrCnt, nStrCntLen + 1);
	for(size_t ix = 0; ix < vecStrings.size(); ++ix)
	{
		const char* buf = vecStrings[ix].c_str();
		size_t buflen = vecStrings[ix].size();
		fileStream.write(buf, buflen);
		
	}
	
}

bool ClassLabelFilter::loadModelFromFile( std::fstream &file ){
    
    if( !file.is_open() ){
        errorLog << "loadModelFromFile(fstream &file) - The file is not open!" << std::endl;
        return false;
    }
    
    std::string word;
    
    //Load the header
    file >> word;
    
    if( word != "GRT_CLASS_LABEL_FILTER_FILE_V1.0" ){
        errorLog << "loadModelFromFile(fstream &file) - Invalid file format!" << std::endl;
        return false;     
    }
    
    file >> word;
    if( word != "NumInputDimensions:" ){
        errorLog << "loadModelFromFile(fstream &file) - Failed to read NumInputDimensions header!" << std::endl;
        return false;     
    }
    file >> numInputDimensions;
    
    //Load the number of output dimensions
    file >> word;
    if( word != "NumOutputDimensions:" ){
        errorLog << "loadModelFromFile(fstream &file) - Failed to read NumOutputDimensions header!" << std::endl;
        return false;     
    }
    file >> numOutputDimensions;
    
    //Load the minimumCount
    file >> word;
    if( word != "MinimumCount:" ){
        errorLog << "loadModelFromFile(fstream &file) - Failed to read MinimumCount header!" << std::endl;
        return false;     
    }
    file >> minimumCount;
    
    file >> word;
    if( word != "BufferSize:" ){
        errorLog << "loadModelFromFile(fstream &file) - Failed to read BufferSize header!" << std::endl;
        return false;     
    }
    file >> bufferSize;
    
    //Init the classLabelFilter module to ensure everything is initialized correctly
    return init(minimumCount,bufferSize);
}

// sets the prog name. Requires a file pointer. Extracts exactly six characters
// from fstream
void HeaderRecord::setProgName(std::fstream & file) {
    int i;
    // get 6 characters and append them to the progName string
    for (i = 0; i < 6; i++) {
        // needs a string argument for append()
        char tempChar = file.get();
        
        // error handler, check for eof bit
        Record::unexpectedEOF(file);
        // append to string
        progName += tempChar;
    }
    std::cout << "Program name: " + progName;
}

/// Reads from file stream.
void Tile::ReadFrom(std::fstream & file){
	// Read version
	int version;
	file.read((char*)&version, sizeof(int));
	assert(tileVersion == version);
	// Read type
	file.read((char*)&typeIndex, sizeof(int));
	// Read position.
	position.ReadFrom(file);
	
	// Write stuff bound to the tile.
	int stuff = 0;
	file.read((char*)&stuff, sizeof(int));
	// If got event
	if (stuff & 0x001){
		// Load event source
		event = new Script();
		event->source.ReadFrom(file);
		// Load it straight away, or...?
	}
	// Write description of additional details to file.
	description.WriteTo(file);
}

bool ClassLabelTimeoutFilter::loadModelFromFile( std::fstream &file ){
    
    if( !file.is_open() ){
        errorLog << "loadModelFromFile(fstream &file) - The file is not open!" << std::endl;
        return false;
    }
    
    std::string word;
    
    //Load the header
    file >> word;
    
    if( word != "GRT_CLASS_LABEL_TIMEOUT_FILTER_FILE_V1.0" ){
        errorLog << "loadModelFromFile(fstream &file) - Invalid file format!" << std::endl;
        return false;     
    }
    
    file >> word;
    if( word != "NumInputDimensions:" ){
        errorLog << "loadModelFromFile(fstream &file) - Failed to read NumInputDimensions header!" << std::endl;
        return false;     
    }
    file >> numInputDimensions;
    
    //Load the number of output dimensions
    file >> word;
    if( word != "NumOutputDimensions:" ){
        errorLog << "loadModelFromFile(fstream &file) - Failed to read NumOutputDimensions header!" << std::endl;
        return false;     
    }
    file >> numOutputDimensions;
    
    //Load the filterMode
    file >> word;
    if( word != "FilterMode:" ){
        errorLog << "loadModelFromFile(fstream &file) - Failed to read FilterMode header!" << std::endl;
        return false;     
    }
    file >> filterMode;
    
    file >> word;
    if( word != "TimeoutDuration:" ){
        errorLog << "loadModelFromFile(fstream &file) - Failed to read TimeoutDuration header!" << std::endl;
        return false;     
    }
    file >> timeoutDuration;
    
    //Init the classLabelTimeoutFilter module to ensure everything is initialized correctly
    return init(timeoutDuration,filterMode);
}