Clear the screen before printing stats

cmdline/mingw.c

@@ -271,6 +271,28 @@ void os_abort(void)
 	exit(EXIT_FAILURE);
 }
 
+void os_clear(void)
+{
+	HANDLE console;
+	CONSOLE_SCREEN_BUFFER_INFO screen;
+	COORD coord;
+	DWORD written;
+
+	/* get the console */
+	console = GetStdHandle(STD_OUTPUT_HANDLE);
+	if (console == INVALID_HANDLE_VALUE)
+		return;
+
+	/* get the screen size */
+	if (!GetConsoleScreenBufferInfo(console, &screen))
+		return;
+
+	/* fill the screen with spaces */
+	coord.X = 0;
+	coord.Y = 0;
+	FillConsoleOutputCharacterA(console, ' ', screen.dwSize.X * screen.dwSize.Y, coord, &written);
+}
+
 /**
  * Size in chars of conversion buffers for u8to16() and u16to8().
  */

cmdline/portable.h

@@ -352,6 +352,11 @@ void os_done(void);
  */
 void os_abort(void) __noreturn;
 
+/**
+ * Clear the screen.
+ */
+void os_clear(void);
+
 /**
  * Log file.
  *

cmdline/state.c

@@ -4018,6 +4018,7 @@ int state_progress(struct snapraid_state* state, struct snapraid_io* io, block_o
 				out_eta = (countmax - countpos) * delta_time / (60 * delta_pos);
 
 			if (msg_level >= MSG_VERBOSE) {
+				os_clear();
 				state_usage_graph(state, io, state->progress_ptr, oldest);
 			}
 		}

cmdline/unix.c

@@ -1226,5 +1226,11 @@ void os_abort(void)
 }
 /* LCOV_EXCL_STOP */
 
+void os_clear(void)
+{
+	/* ANSI code for clear screen */
+	printf("\033[2J");
+}
+
 #endif