io_util.h

/* Copyright (c) The Grit Game Engine authors 2016
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#ifndef IO_UTIL_H
#define IO_UTIL_H

#include <cstdlib>
#include <cstdio>
#include <cstring>

#include <string>
#include <iostream>
#include <fstream>

#include "exception.h"

std::string absolute_path (const std::string &dir, const std::string &rel);

class InFile {
    std::ifstream in;
    public:
    const std::string filename;
    InFile (const std::string &filename);
    ~InFile (void) { in.close(); }
    template<class T> void read (T &v)
    {
        in.read((char*)&v, sizeof(v));
        if (!in.good()) {
            EXCEPT<<filename<<": "<<std::string(strerror(errno))<<std::endl;
        }   
    }
    template<class T> T read (void)
    {
        T v;
        read(v);
        return v;
    }
};

class OutFile {
    std::ofstream out;
    public:
    const std::string filename;
    OutFile (const std::string &filename);
    ~OutFile (void) { out.close(); }
    template<class T> void write (const T &v)
    {
        out.write((char*)&v, sizeof(v));
        if (!out.good()) {
            EXCEPT<<filename<<": "<<std::string(strerror(errno))<<std::endl;
        }   
    }
};

#endif