+ delete capture_demo_stream;
+ delete playback_demo_stream;
+ delete demo_controller;
+
+ current_ = NULL;
+}
+
+void
+GameSession::record_demo(const std::string& filename)
+{
+ delete capture_demo_stream;
+
+ capture_demo_stream = new std::ofstream(filename.c_str());
+ if(!capture_demo_stream->good()) {
+ std::stringstream msg;
+ msg << "Couldn't open demo file '" << filename << "' for writing.";
+ throw std::runtime_error(msg.str());
+ }
+ capture_file = filename;
+
+ char buf[30]; // save the seed in the demo file
+ snprintf(buf, sizeof(buf), "random_seed=%10d", config->random_seed);
+ for (int i=0; i==0 || buf[i-1]; i++)
+ capture_demo_stream->put(buf[i]);
+}
+
+int
+GameSession::get_demo_random_seed(const std::string& filename)
+{
+ std::istream* test_stream = new std::ifstream(filename.c_str());
+ if(test_stream->good()) {
+ char buf[30]; // recall the seed from the demo file
+ int seed;
+ for (int i=0; i<30 && (i==0 || buf[i-1]); i++)
+ test_stream->get(buf[i]);
+ if (sscanf(buf, "random_seed=%10d", &seed) == 1) {
+ log_info << "Random seed " << seed << " from demo file" << std::endl;
+ return seed;
+ }
+ else
+ log_info << "Demo file contains no random number" << std::endl;
+ }
+ return 0;
+}
+
+void
+GameSession::play_demo(const std::string& filename)
+{
+ delete playback_demo_stream;
+ delete demo_controller;
+
+ playback_demo_stream = new std::ifstream(filename.c_str());
+ if(!playback_demo_stream->good()) {
+ std::stringstream msg;
+ msg << "Couldn't open demo file '" << filename << "' for reading.";
+ throw std::runtime_error(msg.str());
+ }
+
+ Player& tux = *currentsector->player;
+ demo_controller = new CodeController();
+ tux.set_controller(demo_controller);
+
+ // skip over random seed, if it exists in the file
+ char buf[30]; // ascii decimal seed
+ int seed;
+ for (int i=0; i<30 && (i==0 || buf[i-1]); i++)
+ playback_demo_stream->get(buf[i]);
+ if (sscanf(buf, "random_seed=%010d", &seed) != 1)
+ playback_demo_stream->seekg(0); // old style w/o seed, restart at beg