added progress bar

src/streamer.cpp

@@ -5,6 +5,34 @@
 #include <ostream>
 #include <string>
 #include <unistd.h>
+#include <sys/ioctl.h>
+
+const char CLEAR_LINE[] = "\x1b[2K";
+
+static void display_progress(unsigned long at, unsigned long size) {
+	
+	struct winsize w;
+	ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
+	unsigned cols = w.ws_col - 8;
+
+	std::cout << "[";
+	
+	unsigned long j = at * cols / size;
+
+	for(unsigned long i = 0; i < cols; i++) {
+		char ch;
+		if(i > j) {
+			ch = ' ';
+		} else if(i == j) {
+			ch = '>';
+		} else {
+			ch = '=';
+		}
+		std::cout << ch;
+	}
+
+	std::cout << "] " << (at * 100 / size) << "%\r" << std::flush;
+}
 
 int main(int argc, char** argv) {
 	std::string data;
@@ -14,6 +42,8 @@ int main(int argc, char** argv) {
 		return 1;
 	}
 
+	std::cout << "loaded: " << data.length() << " bytes" << std::endl;
+
 	unsigned at = 0;
 	Device device(argv[1]);
 	device.put(Device::Mode::e_serial);
@@ -22,12 +52,12 @@ int main(int argc, char** argv) {
 		Device::Mode mode = (Device::Mode)device.get();
 		switch(mode) {
 		default: {
-			std::cout << "device: unknown (" << mode << ")" << std::endl;
+			std::cout << CLEAR_LINE << "device: unknown (" << mode << ")" << std::endl;
 			break;
 		}
 		case Device::Mode::e_ready: {
 			device.put(Device::Mode::e_serial);
-			std::cout << "device: ready" << std::endl;
+			std::cout << CLEAR_LINE << "device: ready" << std::endl;
 			break;
 		}
 		case Device::Mode::e_jump: {
@@ -35,7 +65,6 @@ int main(int argc, char** argv) {
 			at = (at << 8) | (device.get() & 0xff);
 			at = (at << 8) | (device.get() & 0xff);
 			at = (at << 8) | (device.get() & 0xff);
-			std::cout << "device: jump (" << at << ")" << std::endl;
 			break;
 		}
 		case Device::Mode::e_read: {
@@ -53,6 +82,8 @@ int main(int argc, char** argv) {
 			}
 			break;
 		}}
+
+		display_progress(at, data.length());
 	}
 }