Function expand_macro_string

source/runtime.cpp:4669–4771

}

static std::string expand_macro_string(const std::string &input, std::vector<std::pair<std::string, std::string>> macros, std::chrono::system_clock::time_point now)
{
	const auto now_seconds = std::chrono::time_point_cast<std::chrono::seconds>(now);

	char timestamp[21];
	const std::time_t t = std::chrono::system_clock::to_time_t(now_seconds);
	struct tm tm; localtime_s(&tm, &t);

	std::snprintf(timestamp, std::size(timestamp), "%.4d-%.2d-%.2d", tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday);
	macros.emplace_back("Date", timestamp);
	std::snprintf(timestamp, std::size(timestamp), "%.4d", tm.tm_year + 1900);
	macros.emplace_back("DateYear", timestamp);
	macros.emplace_back("Year", timestamp);
	std::snprintf(timestamp, std::size(timestamp), "%.2d", tm.tm_mon + 1);
	macros.emplace_back("DateMonth", timestamp);
	macros.emplace_back("Month", timestamp);
	std::snprintf(timestamp, std::size(timestamp), "%.2d", tm.tm_mday);
	macros.emplace_back("DateDay", timestamp);
	macros.emplace_back("Day", timestamp);

	std::snprintf(timestamp, std::size(timestamp), "%.2d-%.2d-%.2d", tm.tm_hour, tm.tm_min, tm.tm_sec);
	macros.emplace_back("Time", timestamp);
	std::snprintf(timestamp, std::size(timestamp), "%.2d", tm.tm_hour);
	macros.emplace_back("TimeHour", timestamp);
	macros.emplace_back("Hour", timestamp);
	std::snprintf(timestamp, std::size(timestamp), "%.2d", tm.tm_min);
	macros.emplace_back("TimeMinute", timestamp);
	macros.emplace_back("Minute", timestamp);
	std::snprintf(timestamp, std::size(timestamp), "%.2d", tm.tm_sec);
	macros.emplace_back("TimeSecond", timestamp);
	macros.emplace_back("Second", timestamp);
	std::snprintf(timestamp, std::size(timestamp), "%.3lld", std::chrono::duration_cast<std::chrono::milliseconds>(now - now_seconds).count());
	macros.emplace_back("TimeMillisecond", timestamp);
	macros.emplace_back("Millisecond", timestamp);
	macros.emplace_back("TimeMS", timestamp);

	std::string result;

	for (size_t offset = 0, macro_beg, macro_end; offset < input.size(); offset = macro_end + 1)
	{
		macro_beg = input.find('%', offset);
		macro_end = input.find('%', macro_beg + 1);

		if (macro_beg == std::string::npos || macro_end == std::string::npos)
		{
			result += input.substr(offset);
			break;
		}
		else
		{
			result += input.substr(offset, macro_beg - offset);

			if (macro_end == macro_beg + 1) // Handle case of %% to escape percentage symbol
			{
				result += '%';
				continue;
			}
		}