added iterations/sec counter (when verbose)

src/main.cpp

@@ -12,8 +12,10 @@
 #include <stdexcept>
 #include <vector>
 #include <memory>
+#include <thread>
 #include <getopt.h>
 #include <sqlite3.h>
+#include <sc/integer_locale.hpp>
 #include "robinsonizer_mode.hpp"
 #include "engine.hpp"
 
@@ -137,8 +139,27 @@ int main(int argc, const char * argv[]) {
         if (start.size() == 0) start = "This sentence contains";
         if (maxiter == 0) maxiter = 10;
         engine robinsonizer {start, std::move(numerals), maxiter, mode, verbose};
-        robinsonizer.run();
-        std::cout << robinsonizer << '\n';
+        if (verbose) {
+            std::locale loc {std::locale {}, new sc::integer_locale};
+            std::cerr.imbue(loc);
+            std::cout.imbue(loc);
+
+            std::thread worker {[&robinsonizer](){robinsonizer.run();}};
+
+            unsigned long long cur_iter {robinsonizer.total_iterations()};
+            unsigned long long prev_iter {0};
+
+            while (!robinsonizer.found()) { // show progress info
+                prev_iter = cur_iter;
+                std::this_thread::sleep_for(std::chrono::seconds{1});
+                cur_iter = robinsonizer.total_iterations();
+                std::cerr << '\r' << cur_iter - prev_iter << " iterations per second, " << cur_iter << " total        ";
+            }
+            worker.join();
+        } else {
+            robinsonizer.run();
+        }
+        std::cout << '\n' << robinsonizer << '\n';
 
     } catch (const std::exception& ex) {
         std::cerr << "autogram: " << ex.what() << '\n';