+inline
+uint16_t matrix_get_row(int row) {
+ return matrix[row];
+}
+
+void matrix_print(void) {
+ print("\nr/c 01234567\n");
+ for (int row = 0; row < matrix_rows(); row++) {
+ phex(row); print(": ");
+ pbin_reverse(matrix_get_row(row));
+ if (matrix_has_ghost_in_row(row)) {
+ print(" <ghost");
+ }
+ print("\n");
+ }
+}
+
+int matrix_key_count(void) {
+ int count = 0;
+ for (int i = 0; i < MATRIX_ROWS; i++) {
+ count += bit_pop(~matrix[i]);
+ }
+ return count;
+}
+
+inline
+static bool matrix_has_ghost_in_row(int row) {