Function format

src/util/string/string.cpp:180–240

}

string format(double number) {
	const vector<string> suffixes = { "", "K", "M", "G", "T", "P", "E" };

	if (number == 0) {
		return "0";
	}

	bool is_negative = number < 0;
	double abs_number = std::abs(number);

	int suffix_index = 0;
	if (abs_number >= 1000) {
		int exp = static_cast<int>(std::log10(abs_number) / 3);
		suffix_index = std::min(exp, static_cast<int>(suffixes.size() - 1));
	}

	double divisor = std::pow(1000.0, suffix_index);
	double formatted_number = abs_number / divisor;

	std::ostringstream oss;
	oss << std::fixed << std::setprecision(2) << formatted_number;
	string num_str = oss.str();

	// Trim trailing zeros and decimal point if needed
	size_t dot_pos = num_str.find('.');
	if (dot_pos != std::string::npos) {
		// Find the last non-zero character after the decimal point
		size_t last_non_zero = num_str.find_last_not_of('0');
		if (last_non_zero != std::string::npos) {
			num_str = num_str.substr(0, last_non_zero + 1);
			// If the decimal point is now at the end, remove it
			if (num_str.back() == '.') {
				num_str.pop_back();
			}
		}
	}

	// Check if after trimming, the number is 1000 or more, adjust suffix if possible
	if (formatted_number >= 999.995 && suffix_index < (int)suffixes.size() - 1) {
		suffix_index++;
		divisor *= 1000;
		formatted_number = abs_number / divisor;
		oss.str("");
		oss << std::fixed << std::setprecision(2) << formatted_number;
		num_str = oss.str();
		// Trim again
		dot_pos = num_str.find('.');
		if (dot_pos != std::string::npos) {
			size_t last_non_zero = num_str.find_last_not_of('0');
			if (last_non_zero != std::string::npos) {
				num_str = num_str.substr(0, last_non_zero + 1);
				if (num_str.back() == '.') {
					num_str.pop_back();
				}
			}
		}
	}