log.hpp

/* This file is part of Raul.
 * Copyright (C) 2009 David Robillard <http://drobilla.net>
 *
 * Raul is free software; you can redistribute it and/or modify it under the
 * terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * Raul is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef RAUL_LOG_HPP
#define RAUL_LOG_HPP

#include <iostream>
#include <sstream>
#include <string>

namespace Raul {

class LogBuffer : public std::streambuf
{
public:
    enum Colour {
        DEFAULT = 0,
        RED = 31,
        GREEN,
        YELLOW,
        BLUE,
        MAGENTA,
        CYAN,
        WHITE
    };

    LogBuffer(const char* prefix="", Colour colour=DEFAULT)
        : _prefix(prefix)
        , _colour(colour)
        , _out(std::cout)
    {}

    std::string colour(Colour c);

    std::string plain();

protected:
    int_type overflow(int_type c) {
        if (c == '\n')
            emit();
        else if (c != traits_type::eof())
            _line += c;

        return c;
    }

    int sync() {
        if (!_line.empty())
            emit();
        return 0;
    }

private:
    void emit();

    const char*   _prefix;
    Colour        _colour;
    std::string   _line;
    std::ostream& _out;
};


class NullBuffer : public std::streambuf
{
protected:
    int_type overflow(int_type c) { return c; }
    int      sync()               { return 0; }
};


extern std::ostream info;
extern std::ostream warn;
extern std::ostream error;
extern std::ostream debug;


} // namespace Raul

#endif // RAUL_LOG_HPP