+/*
+ * Test board mask calculation functions.
+ * Copyright © 2022 Nick Bowler
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include "game.h"
+
+enum { display_width = 12 };
+
+static void show_patterns(const char *name, uint_fast32_t func(int))
+{
+ unsigned long vals[5];
+ int i, row, labelw = display_width;
+
+ for (i = 0; i < 5; i++) {
+ printf("%*s", display_width-labelw, "");
+ labelw = printf("%2s(%d)", name, i);
+ vals[i] = func(i);
+ }
+ putchar('\n');
+
+ for (row = 0; row < 5; row++) {
+ putchar(' ');
+ for (i = 0; i < 25; i++) {
+ unsigned long val;
+
+ val = vals[i/5];
+ vals[i/5] >>= 1;
+
+ if (i && i % 5 == 0)
+ printf("%*s", display_width-5, "");
+ putchar(val & 1 ? '@' : '.');
+ if (i == 24)
+ putchar('\n');
+ }
+ }
+}
+
+int main(void)
+{
+ show_patterns("left", board_left);
+ putchar('\n');
+ show_patterns("right", board_right);
+ putchar('\n');
+ show_patterns("above", board_above);
+ putchar('\n');
+ show_patterns("below", board_below);
+}