[C++]ifstream, ofstream 개선

// ex)

COutFile outFile;

outFile.open ( "abc/dd/ee.txt" );

만약, abc/dd폴더가 없으면 만들고 나서 ee.txt를 만든다.

#ifndef WIZFILESTREAM_H_INCLUDED

#define WIZFILESTREAM_H_INCLUDED

//

#include <fstream>

#include <string>

#include <windows.h> // for CreateDirectory

using namespace std;

void MakeFolder( const string fileName )

{

    for( int i=1; i < fileName.length(); i++ )

    {

        if( fileName[i] == '\\' || fileName[i] == '/' ) //

        {

            string subStr = fileName.substr( 0, i );

            const char* ccSubStr = subStr.c_str();

            CreateDirectory( ccSubStr, NULL ); // for gnu, minGW compiler!, not Visual Compiler!

        }

    }

}

class CInFile{

private:

    bool isOpen;

    ifstream* inFile;

    // 대입, 복사생성자 방지., 비교 연산 방지.

    CInFile( const CInFile& p ); // 별도 구현 없음.

    CInFile& operator=( const CInFile& p );

    bool operator==( const CInFile& p );

    // new, delete 금지..

    static void* operator new( size_t construcFunc );

    static void operator delete( void* d );

public:

    CInFile(){

        isOpen = false;

        inFile = new ifstream();

    }

    ~CInFile(){ // 상속해서는 안 된다.

        if( isOpen ){

            //cout << "close" << endl;

            close();

        }

        delete inFile;

    }

    bool open( string fileName ){ // 파일 이름.

        if( isOpen ){ // 닫지 않았다면..

            close();

        }

        inFile->open( fileName.data() );

        isOpen = !inFile->fail(); // 한번 실패하면 계속 실패상태이다.? //원래대로 못돌리나 ?

        if( !isOpen ){

            delete inFile;

            inFile = new ifstream();

        }

        return isOpen; //실패하면 false.

    }

    void close() {

        inFile->close();

        isOpen = false;

    }

    bool eof(){ return inFile->eof(); }

    void useSKIPWS(){

        inFile->unsetf( ios::skipws );

    }

    string getLine(){

        string temp;

        getline( *inFile, temp );

        return temp;

    }

    bool isOpened()const{

        return isOpen;

    }

public:

    template <class T>

    friend

    CInFile& operator>>( CInFile& stream, T& x );

};

class COutFile{

private:

    bool isOpen;

    ofstream* outFile;

    // 대입, 복사생성자 방지., 비교 연산 방지. //10.3

    COutFile( const COutFile& p ); // 별도 구현 없음.

    COutFile& operator=( const COutFile& p );

    bool operator==( const COutFile& p );

    // new, delete 금지..

    static void* operator new( size_t construcFunc );

    static void operator delete( void* d );

public:

    COutFile(){

        isOpen = false;

        outFile = new ofstream();

    }

    ~COutFile(){ // 상속해서는 안 된다.

        if( isOpen ){

            //cout << "close" << endl;

            close();

        }

       delete outFile;

    }

    bool open( string fileName, bool append=false ){ // 파일 이름.

        if( isOpen ){ // 닫지 않았다면..

            outFile->close();

        }

        // create folder..

        MakeFolder( fileName );

        // append chk

        if( append ){

            outFile->open( fileName.data(), ios::app );

        }

        else{

            outFile->open( fileName.data() );

        }

        // open chk

        isOpen = !outFile->fail(); // 한번 실패하면 계속 실패상태이다.? //원래대로 못돌리나 ?

        // err process

        if( !isOpen ){

            delete outFile;

            outFile = new ofstream();

        }

        return isOpen; //실패하면 false.

    }

    void close(){

        outFile->close();

        isOpen = false;

    }

    bool eof()const{ return outFile->eof(); }

    bool isOpened()const

    {

        return isOpen;

    }

    template <class T>

    friend

    COutFile& operator<<( COutFile& stream, T x );

};

template <class T>

CInFile& operator>>( CInFile& stream, T& x )

{

    (*stream.inFile) >> x ;

    return stream;

}

template <class T>

COutFile& operator<<( COutFile& stream, T x )

{

    (*stream.outFile) << x;

    return stream;

}

#endif // WIZFILESTREAM_H_INCLUDED

[출처] ifstream, ofstream 개선|작성자 Wizard