AutoFilePtr.h

// -*- c++ -*-

#ifndef __AUTO_FILE_PRT_H__
#define __AUTO_FILE_PRT_H__

// system
#include <stdio.h>

// tool
#include "tools/NoCopy.h"


class AutoFilePtr
{
public:

    AutoFilePtr(const char *filename, const char *mode)
        : f(0)
    {
        open(filename, mode);
    }

    AutoFilePtr(FILE *f = 0) : f(f) {}

    ~AutoFilePtr()
    {
        close();
    }

    bool open(const char *filename, const char *mode)
    {
        set(fopen(filename, mode));
        return f != 0;
    }

    void close()
    {
        set(0);
    }

    void set(FILE *new_f)
    {
        if (f)
            fclose(f);
        f = new_f;
    }

    operator bool () const
    {
        return f != 0;
    }

    operator FILE * () const
    {
        return f;
    }
private:
    PROHIBIT_DEFAULT_COPY(AutoFilePtr);
    FILE *f;
};

#endif