ev3cxx_file.h

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#pragma once

#include <stdio.h>

#include "ev3api.h"
#include "ev3cxx_format.h"

namespace ev3cxx {
    
class File
{
protected:
    File() : m_filedesc(NULL) {}

public:
    File(const char * filename, const char * mode = "w+") {
        open(filename, mode);
    }

    virtual ~File() {
        close();
    }

    FILE * operator () () {
        return m_filedesc;
    }

    virtual bool_t open(const char * filename, const char * mode = "w+") {
        return ((m_filedesc = fopen(filename, mode)) != NULL);
    }
    
    virtual bool_t isOpen(){
        return (m_filedesc != NULL);
    }

    virtual int close() {
        if(isOpen()) { 
            int ret = fclose(m_filedesc);
            if(0 == ret) {
                m_filedesc = NULL;
            }
            return ret;
        }
        return 0;
    }

    int write(char ch) {
        return fputc(ch, m_filedesc);
    }

    int readChar() {
        return fgetc(m_filedesc);
    } 

    template <typename T>
    typename std::enable_if<std::is_integral<T>::value, int>::type 
    readNumber(T &val) 
    {
        long long integral;
        int er = fscanf(m_filedesc, "%lld", &integral);
        val = integral;
        return er;
    }  

    template <typename T>
    typename std::enable_if<std::is_floating_point<T>::value, int>::type 
    readNumber(T &val) 
    {
        double floating_point;
        int er = fscanf(m_filedesc, "%lf", &floating_point);
        val = floating_point;
        return er;
    }  

    void rewind() {
        ::rewind(m_filedesc);
    }

protected:
     FILE * m_filedesc;               
   
}; // class File

} // namespace ev3cxx