fortuna: add moar_random_data() fun

fortuna.cpp

@@ -118,6 +118,28 @@ auto Fortuna::random_data(const uint64_t n_bytes) -> void {
 	fmt::print(stderr, "getting random data took {:.{}f}s\n", diff.count(), 12);
 } // random_data
 
+auto Fortuna::moar_random_data(const uint64_t& n_bytes) -> void {
+	// used for requests of more than 2^20 bytes
+	// modus operandi: calculate how many consecutive requests to
+	// "random_data(2^20)" are needed, call random_data() until done
+
+	if (n_bytes > Fortuna::two_pow_twenty) {
+		uint64_t how_many_ops{n_bytes / Fortuna::two_pow_twenty};
+
+		uint64_t remaining{n_bytes};
+		fmt::print(stderr, "[i] fortuna: remaining {} bytes\n", remaining);
+		while (--how_many_ops > 0) {
+			this->random_data(Fortuna::two_pow_twenty);
+			remaining -= Fortuna::two_pow_twenty;
+			fmt::print(stderr, "[i] fortuna: remaining {} bytes\n", remaining);
+		}
+		this->random_data(remaining);
+	}
+	else {
+		this->random_data(n_bytes);
+	}
+} // moar_random_data
+
 
 auto Fortuna::seed_file_manager_service() -> void {
 	static constexpr const std::chrono::seconds checkup_interval{7};

fortuna.h

@@ -36,6 +36,8 @@ public:
 	~Fortuna() noexcept;
 
 	[[optimize_for_synchronized]] auto random_data(const uint64_t) -> void;
+	[[optimize_for_synchronized]] auto moar_random_data(const uint64_t&)
+		-> void;
 
 	auto set_reseed_ctr_to_null() -> void {
 		std::scoped_lock sl(mtx_accu, print_mtx);