Clear to EOL after Enter.

main.c

@@ -113,6 +113,8 @@ static void list_statement() {
     uint8_t *line = g_program;
     uint8_t *next_line;
 
+    print_newline();
+
     while ((next_line = get_next_line(line)) != 0) {
         print_int(get_line_number(line));
         print_char(' ');
@@ -529,6 +531,7 @@ int16_t main(void)
                     }
                 } else if (key == 13) {
                     // Return.
+                    clear_to_eol();
                     print_char('\n');
 
                     process_input_buffer();

runtime.c

@@ -6,6 +6,7 @@
 #define SCREEN_HEIGHT 24
 #define SCREEN_WIDTH 40
 #define SCREEN_STRIDE (3*SCREEN_WIDTH + 8)
+#define CLEAR_CHAR (' ' | 0x80)
 
 // Location of cursor in logical screen space.
 uint16_t g_cursor_x = 0;
@@ -65,11 +66,22 @@ void move_cursor(int16_t x, int16_t y) {
     g_cursor_y = y;
 }
 
+/**
+ * Blanks out the rest of the line, from the cursor (inclusive) on.
+ * Does not move the cursor.
+ */
+void clear_to_eol(void) {
+    uint8_t *pos = cursor_pos();
+
+    hide_cursor();
+    memset(pos, CLEAR_CHAR, SCREEN_WIDTH - g_cursor_x);
+}
+
 /**
  * Clear the screen with non-reversed spaces.
  */
 void home(void) {
-    memset(TEXT_PAGE1_BASE, ' ' | 0x80, SCREEN_STRIDE*8);
+    memset(TEXT_PAGE1_BASE, CLEAR_CHAR, SCREEN_STRIDE*8);
     move_cursor(0, 0);
 }
 
@@ -90,7 +102,7 @@ static void scroll_up(void) {
     }
 
     // This is provided by cc65:
-    memset(previous_line, ' ' | 0x80, SCREEN_WIDTH);
+    memset(previous_line, CLEAR_CHAR, SCREEN_WIDTH);
 }
 
 /**

runtime.h

@@ -13,6 +13,8 @@ void show_cursor(void);
 void hide_cursor(void);
 void move_cursor(int16_t x, int16_t y);
 
+void clear_to_eol(void);
+
 void home(void);
 
 void print(uint8_t *s);