while (fgets(line, sizeof(line), in)) {
                conf_lineno++;
                sym = NULL;
-               switch (line[0]) {
-               case '#':
+               if (line[0] == '#') {
                        if (memcmp(line + 2, "CONFIG_", 7))
                                continue;
                        p = strchr(line + 9, ' ');
                        default:
                                ;
                        }
-                       break;
-               case 'C':
-                       if (memcmp(line, "CONFIG_", 7)) {
-                               conf_warning("unexpected data");
-                               continue;
-                       }
+               } else if (memcmp(line, "CONFIG_", 7) == 0) {
                        p = strchr(line + 7, '=');
                        if (!p)
                                continue;
                        }
                        if (conf_set_sym_val(sym, def, def_flags, p))
                                continue;
-                       break;
-               case '\r':
-               case '\n':
-                       break;
-               default:
-                       conf_warning("unexpected data");
+               } else {
+                       if (line[0] != '\r' && line[0] != '\n')
+                               conf_warning("unexpected data");
                        continue;
                }
                if (sym && sym_is_choice_value(sym)) {