FileUtil.h

#ifndef _CSTRINGFILE_H_
#define _CSTRINGFILE_H_

#include <windows.h>

class FileUtil {
private:
    HANDLE m_file; // file handle
    DWORD m_file_size; // file size
    BYTE* m_buffer; // the buffer for reading
    int m_buffer_size; // its size
    int m_buffer_index; // current parsing position
    int m_buffer_readed; // the size of the buffer read in memory
    int m_buffer_line; // the counter of lines in a file

public:
    FileUtil(const int nBufSize = 65536);
    ~FileUtil();

    bool Open(LPCTSTR lpFileName, const DWORD dwAccess, const DWORD dwCreationFlags);
    inline void Close() {
        if (m_file != INVALID_HANDLE_VALUE) {
            CloseHandle(m_file);
            m_file = INVALID_HANDLE_VALUE;
        }
        m_file_size = 0;
    }
    inline DWORD Size() const {
        return (m_file_size);
    }
    int Read(void* buffer, const DWORD length);
    int Write(const void* buffer, const DWORD length);
    void Reset();
    int GetNextLine(char* line, const int maxsize);
};
//+------------------------------------------------------------------+
#endif // !_STRINGFILE_H_