print.cpp

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// -------------------------------------------------------//
//
// SHAMROCK code for hydrodynamics
// Copyright (c) 2021-2026 Timothée David--Cléris <tim.shamrock@proton.me>
// SPDX-License-Identifier: CeCILL Free Software License Agreement v2.1
// Shamrock is licensed under the CeCILL 2.1 License, see LICENSE for more information
//
// -------------------------------------------------------//
 
#include "shambase/print.hpp"
#include <iostream>
#include <ostream>
 
namespace shambase {
 
    using printer_t = void (*)(std::string_view);
    using flush_t   = void (*)();
 
    static printer_t _printer   = nullptr; 
    static printer_t _printerln = nullptr; 
    static flush_t _flush       = nullptr; 
 
    void print(std::string_view s) {
        if (_printer == nullptr) {
            std::cout << s;
        } else {
            _printer(s);
        }
    }
    void println(std::string_view s) {
        if (_printerln == nullptr) {
            std::cout << s << "\n";
        } else {
            _printerln(s);
        }
    }
    void flush() {
        if (_flush == nullptr) {
            std::cout << std::flush;
        } else {
            _flush();
        }
    }
 
    void change_printer(
        void (*func_printer_normal)(std::string_view),
        void (*func_printer_ln)(std::string_view),
        void (*func_flush_func)()) {
        _printer   = func_printer_normal;
        _printerln = func_printer_ln;
        _flush     = func_flush_func;
    }
 
    void reset_std_behavior() { change_printer(nullptr, nullptr, nullptr); }
 
} // namespace shambase