文本文件编辑器

原理很简单, 利用标准库的文件流, 逐行读取文本文件, 然后每行一个 string 放进 vector 容器里面去.

行操作就可以简单的操作每一个 string 即可. 
列操作可以操作每一个 string 的下标即可.

#pragma once

#include <string>
#include <vector>
#include <fstream>

template< class _Elem >
class CTxtFileEditor :
    public std::vector<basic_string<_Elem, char_traits<_Elem>, allocator<_Elem>>>
{
    typedef basic_ifstream<_Elem, char_traits<_Elem> > IFStream;
    typedef basic_ofstream<_Elem, char_traits<_Elem> > OFStream;
    typedef basic_string<_Elem, char_traits<_Elem>, allocator<_Elem>> String;
    String m_wscPathFile;
public:
    CTxtFileEditor(const String pathFile)
    {
        ReadViaLocalFile(pathFile);
    }
    CTxtFileEditor(const _Elem * ptrPathFile)
    {
        const String pathFile = ptrPathFile;
        ReadViaLocalFile(pathFile);
    }
    bool ReadViaLocalFile(const String pathFile)
    {
        if ( pathFile.empty() )
            return false;

        m_wscPathFile = pathFile;

        std::locale old = std::locale::global(std::locale("chs"));
        IFStream fin(m_wscPathFile.c_str());
        std::locale::global(old);

        String line;
        while( getline(fin,line) )
        {
            push_back( line );
        }

        fin.close();

        return true;
    }
    bool UpdateLocalFile()
    {
        if ( m_wscPathFile.empty() )
            return false;
        std::locale old = std::locale::global(std::locale("chs"));
        OFStream fout( m_wscPathFile.c_str() );
        std::locale::global(old);
        for ( iterator it = begin(); it != end(); ++it )
        {
            String content = *it + static_cast<_Elem>('\n');
            fout.write ( content.c_str(),static_cast<std::streamsize>(content.size()) );
        }
        fout.close();
        return true;
    }
};

typedef CTxtFileEditor< char > CTxtFileEditorA;
typedef CTxtFileEditor< wchar_t > CTxtFileEditorW;