Streams.h

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/* Copyright 2016 Kristofer Björnson
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef COM_DAFER45_TBTK_STREAMS
#define COM_DAFER45_TBTK_STREAMS

#include <ostream>
#include <fstream>
#include <string>
#include <vector>

namespace TBTK{
namespace Util{

class Streams{
public:
    static std::ostream out;

    static std::ostream log;

    static std::ostream err;

    static void setStdMuteOut();

    static void setStdMuteErr();

    static void openLog(std::string filename = "TBTKLog");

    static void closeLog();

    static bool logIsOpen();
private:
    static class NullBuffer : public std::streambuf{
    public:
        int overflow(int c);
    } nullBuffer;

    class ForkBuffer : public std::streambuf{
    public:
        ForkBuffer(
            std::basic_ostream<char, std::char_traits<char>> *ostream1,
            std::basic_ostream<char, std::char_traits<char>> *ostream2
        );

        void mute(int n, bool isMute);
    private:
        std::basic_ostream<char, std::char_traits<char>> *ostreams[2];

        bool isMute[2];

        int overflow(int c);
    };

    class LogBuffer : public std::streambuf{
    public:
        LogBuffer();

        ~LogBuffer();

        void open(std::string fileName);

        void close();

        bool isOpen();
    private:
        std::ofstream fout;

        int overflow(int c);
    };

    static std::ostream null;

    static ForkBuffer stdOutBuffer;

    static LogBuffer stdLogBuffer;

    static ForkBuffer stdErrBuffer;

    static std::ofstream logFile;
};

};  //End of namespace Util
};  //End of namespace TBTK

#endif