h804tun/common.cpp

#include "common.h"

#include <unistd.h>
#include <cerrno>
#include <cstring>

namespace h804 {
void daemon_notify_ready() {
#ifdef H804_SYSTEMD_ENABLE
    sd_notify(0, "READY=1");
#endif
}

void daemon_notify(const std::string& args) {
#ifdef H804_SYSTEMD_ENABLE
    sd_notify(0, args.c_str());
#else
    (void)args;
#endif
}

// clang-format off
const char* _log_text[(size_t)LogLevel::_SIZE] = {
#ifdef H804_SYSTEMD_ENABLE
    SD_DEBUG "[DEBUG] ",
    SD_INFO "[INFO ] ",
    SD_NOTICE "[NOTIC] ",
    SD_WARNING "[WARN ] ",
    SD_ERR "[ERROR] "
#else
    "[DEBUG] ",
    "[INFO ] ",
    "[NOTIC] ",
    "[WARN ] ",
    "[ERROR] "
#endif
};

const char* _log_colors[(size_t)LogLevel::_SIZE] = {
            "[DEBUG] ",
    "\e[0;32m[INFO ] ",
    "\e[0;36m[NOTIC] ",
    "\e[1;93m[WARN ] ",
    "\e[1;91m[ERROR] "
};
// clang-format on
const char* log_reset = "\e[0m";

void _log(const LogLevel, const std::string&);
void _log(const LogLevel, const char*);

void _log(const LogLevel level, const std::string& text) {
    if (isatty(STDERR_FILENO)) {
        std::cerr << _log_colors[(size_t)level] << text << log_reset << std::endl;
    } else {
        std::cerr << _log_text[(size_t)level] << text << std::endl;
    }
}

void _log(const LogLevel level, const char* text) {
    if (isatty(STDERR_FILENO)) {
        std::cerr << _log_colors[(size_t)level] << text << log_reset << std::endl;
    } else {
        std::cerr << _log_text[(size_t)level] << text << std::endl;
    }
}

_Logger::_Logger(LogLevel level) : level(level) {}

void _Logger::operator<<(const std::string& str) const { _log(level, str); }

void _Logger::operator<<(const char* str) const { _log(level, str); }

errno_exception::errno_exception() noexcept : _what(strerror(errno)), saved_errno(errno) {}

errno_exception::errno_exception(const char* msg) noexcept
    : _what(std::string(msg) + ": " + strerror(errno)), saved_errno(errno) {}

const char* errno_exception::what() const noexcept { return this->_what.c_str(); }

void check(long x) {
    if (x < 0) {
        throw errno_exception();
    }
}
void check(long x, const char* msg) {
    if (x < 0) {
        throw errno_exception(msg);
    }
}

}  // namespace h804