Function generate_displayable_code

src/dpp/voice/enabled/displayable_code.cpp:32–53

namespace dpp {

std::string generate_displayable_code(const std::vector<uint8_t> &data, size_t desired_length = 30, size_t group_size = 5) {

	if (data.empty()) {
		return "";
	}

	const size_t group_modulus = std::pow(10, group_size);
	std::stringstream result;

	for (size_t i = 0; i < desired_length; i += group_size) {
		size_t group_value{0};

		for (size_t j = group_size; j > 0; --j) {
			const size_t next_byte = data.at(i + (group_size - j));
			group_value = (group_value << 8) | next_byte;
		}
		group_value %= group_modulus;
		result << std::setw(group_size) << std::setfill('0') << std::to_string(group_value) << " ";
	}

	return result.str();
}

}