C: 2022 day 2

2022/RESULTS.txt

@@ -19,3 +19,25 @@ aoc.bash: res=198551
 aoc-c: res=198551
 	time: 0:00.00 real, 0.00 user, 0.00 sys
 	context-switch:	0+1, page-faults: 0+87
+
+=========================================
+================= day02 =================
+=========================================
+
++++++++++++++++++ part 1
+aoc.bash: res=11841
+	time: 0:00.05 real, 0.05 user, 0.00 sys
+	context-switch:	7+1, page-faults: 0+273
+
+aoc-c: res=11841
+	time: 0:00.00 real, 0.00 user, 0.00 sys
+	context-switch:	0+1, page-faults: 0+87
+
++++++++++++++++++ part 2
+aoc.bash: res=13022
+	time: 0:00.05 real, 0.03 user, 0.01 sys
+	context-switch:	9+1, page-faults: 0+272
+
+aoc-c: res=13022
+	time: 0:00.00 real, 0.00 user, 0.00 sys
+	context-switch:	0+1, page-faults: 0+87

2022/day02/Makefile

@@ -71,11 +71,11 @@ assembly: aoc-c.s
 
 part1: aoc-c
 	@$(TIME) aoc.bash -p 1 < $(INPUT) 2>&1
-	@#$(TIME) aoc-c -p 1 < $(INPUT)
+	@$(TIME) aoc-c -p 1 < $(INPUT)
 
 part2: aoc-c
 	@$(TIME) aoc.bash -p 2 < $(INPUT) 2>&1
-	@#$(TIME) aoc-c -p 2 < $(INPUT)
+	@$(TIME) aoc-c -p 2 < $(INPUT)
 
 ccls: $(CCLSFILE)
 

2022/day02/aoc-c.c

@@ -0,0 +1,64 @@
+/* aoc-c.c: Advent of Code 2022, day 2
+ *
+ * Copyright (C) 2022 Bruno Raoult ("br")
+ * Licensed under the GNU General Public License v3.0 or later.
+ * Some rights reserved. See COPYING.
+ *
+ * You should have received a copy of the GNU General Public License along with this
+ * program. If not, see <https://www.gnu.org/licenses/gpl-3.0-standalone.html>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later <https://spdx.org/licenses/GPL-3.0-or-later.html>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "plist.h"
+#include "debug.h"
+#include "pool.h"
+#include "aoc.h"
+
+/* we will use the following convention, for input line "a x":
+ * position in array=(a-'A' * 3) + x - 'X'
+ */
+enum {
+    A = 0, B, C,
+    X = 0, Y, Z
+};
+#define pos(x, y) ((x) * 3 + (y))
+
+int outcome[2][9] = {                             /* shape is known */
+    {
+        [pos(A, X)] = 3 + 1, [pos(A, Y)] = 6 + 2, [pos(A, Z)] = 0 + 3,
+        [pos(B, X)] = 0 + 1, [pos(B, Y)] = 3 + 2, [pos(B, Z)] = 6 + 3,
+        [pos(C, X)] = 6 + 1, [pos(C, Y)] = 0 + 2, [pos(C, Z)] = 3 + 3
+    },
+    {                                             /* result is known */
+        [pos(A, X)] = 0 + 3, [pos(A, Y)] = 3 + 1, [pos(A, Z)] = 6 + 2,
+        [pos(B, X)] = 0 + 1, [pos(B, Y)] = 3 + 2, [pos(B, Z)] = 6 + 3,
+        [pos(C, X)] = 0 + 2, [pos(C, Y)] = 3 + 3, [pos(C, Z)] = 6 + 1
+    }
+};
+
+static int *parse(int *res)
+{
+    size_t alloc = 0;
+    char *buf = NULL;
+    ssize_t buflen;
+
+    while ((buflen = getline(&buf, &alloc, stdin)) > 0) {
+        for (int i = 0; i < 2; ++i)
+            res[i] += outcome[i][pos(buf[0] - 'A', buf[2] - 'X')];
+    }
+    free(buf);
+    return res;
+}
+
+int main(int ac, char **av)
+{
+    int res[2] = { 0, 0 };
+
+    printf("%s: res=%d\n", *av, parse(res)[parseargs(ac, av) - 1]);
+    exit(0);
+}

2022/day02/aoc.bash

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 #
-# aoc.bash: Advent of Code 2022, day 1
+# aoc.bash: Advent of Code 2022, day 2
 #
 # Copyright (C) 2022 Bruno Raoult ("br")
 # Licensed under the GNU General Public License v3.0 or later.