C++ time displayer - testing stuff

/*
 * MAIN.CPP - 25.07.2021 @ 09:59
 * Marcin Gomulak aka Maki
 * makipol@gmail.com
 * PUBLIC DOMAIN - whatever
 *
 *
 * This tiny software just displays time in 24-hour mode updating every second
 */


// ReSharper disable CommentTypo
#include <iostream>
#include <ctime>
#include <chrono>

using chrono = std::chrono::system_clock;
#define NEWLINE << std::endl;  // NOLINT(cppcoreguidelines-macro-usage) ||||| No, I don't agree

#define __GLORYTEXT "glory to twenty-four time system!"

#define WIDE_CHARS 1 //CHANGE TO SWITCH BETWEEN ANSI AND WIDE CHAR
#if WIDE_CHARS
#define _CHAR wchar_t //this is extremely dangerous- don't do that
#define _COUT std::wcout
#define SPRINTFS swprintf_s
constexpr _CHAR gloryText[] = L" " __GLORYTEXT;
constexpr _CHAR TIMEFORMAT[] = L"%02d:%02d:%02d - %ls";
#else
#define SPRINTFS sprintf_s
#define _COUT std::cout
#define _CHAR char
constexpr _CHAR gloryText[] = u8" " __GLORYTEXT;
constexpr _CHAR TIMEFORMAT[] = u8"%02d:%02d:%02d - %s";
#endif

constexpr uint16_t DEFAULT_BUFFER_SIZE = 1<<8; //8bit maximum + 1
char buffer[DEFAULT_BUFFER_SIZE];
_forceinline time_t GetChronoTime() { return chrono::to_time_t(chrono::now()); }
static time_t newTime, oldTime = GetChronoTime();
static _Notnull_ _CHAR * staticBuffer = nullptr;
 _CHAR* GetTimeFormatted()
{
    tm tm; // NOLINT(cppcoreguidelines-pro-type-member-init |||| should we init the struct with {} or just
                                                                //hold the return address to stack local space?
    localtime_s(&tm, &newTime); //struct tm holds parsed data
    if(staticBuffer == nullptr)
        staticBuffer = static_cast<_CHAR*>(malloc(DEFAULT_BUFFER_SIZE * sizeof(_CHAR)));
#pragma warning (push)
#pragma warning (disable: 6387) //I'm aware of it and it's not a case in here
    SPRINTFS(staticBuffer, DEFAULT_BUFFER_SIZE, TIMEFORMAT,
        tm.tm_hour, tm.tm_min, tm.tm_sec,
        gloryText);
#pragma warning (pop)
    return staticBuffer;
}

int main()
{
    while(true) { //main loop
        newTime = GetChronoTime(); //grab actual value
        if(oldTime != newTime) {  //this is stack so whatever
            oldTime = newTime; //reupdate the value for last/old time
            _COUT << GetTimeFormatted() NEWLINE }
                } //end of endless loop
    return 0;
}