+/*
+ * Helper to test board_rect function.
+ * 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 "game.h"
+#include "tap.h"
+
+#define mask_char(x) ((x) ? '@' : '.')
+
+static void print_mask(const char *prefix, unsigned long mask)
+{
+ int i;
+
+ for (i = 0; i < 5; i++) {
+ tap_diag("%s%c%c%c%c%c", prefix, mask_char(mask & 1),
+ mask_char(mask & 2),
+ mask_char(mask & 4),
+ mask_char(mask & 8),
+ mask_char(mask & 16));
+ mask >>= 5;
+ }
+}
+
+static void do_check(int x1, int y1, int x2, int y2)
+{
+ unsigned long expect = board_right(x1)
+ & board_below(y1)
+ & board_left(x2)
+ & board_above(y2);
+
+ unsigned long actual = board_rect(x1, y1, x2, y2);
+
+ if (!tap_result(actual == expect, "board_rect(%d, %d, %d, %d)",
+ x1, y1, x2, y2))
+ {
+ tap_diag("Failed, unexpected result");
+ tap_diag("Received 0x%.7lx:", actual);
+ print_mask(" ", actual);
+ tap_diag("Expected 0x%.7lx:", expect);
+ print_mask(" ", expect);
+ }
+}
+
+int main(void)
+{
+ int x1, y1, x2, y2;
+
+ tap_plan(225);
+
+ /* Exhaustive search of all valid inputs */
+ for (x1 = 0; x1 < 5; x1++) {
+ for (y1 = 0; y1 < 5; y1++) {
+ for (x2 = x1; x2 < 5; x2++) {
+ for (y2 = y1; y2 < 5; y2++) {
+ do_check(x1, y1, x2, y2);
+ }
+ }
+ }
+ }
+ tap_done();
+}